十分详细的Hadoop环境搭建

分手后的思念是犯贱 2022-05-20 05:41 160阅读 0赞

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> 原文：[ 史上最详细的Hadoop环境搭建][Hadoop]   
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### 前言 ###

Hadoop在大数据技术体系中的地位至关重要，Hadoop是大数据技术的基础，对Hadoop基础知识的掌握的扎实程度，会决定在大数据技术道路上走多远。

这是一篇入门文章，Hadoop的学习方法很多，网上也有很多学习路线图。本文的思路是：以安装部署Apache Hadoop2.x版本为主线，来介绍Hadoop2.x的架构组成、各模块协同工作原理、技术细节。安装不是目的，通过安装认识Hadoop才是目的。

本文分为五个部分、十三节、四十九步。

#### 第一部分：Linux环境安装 ####

Hadoop是运行在Linux，虽然借助工具也可以运行在Windows上，但是建议还是运行在Linux系统上，第一部分介绍Linux环境的安装、配置、Java JDK安装等。

#### 第二部分：Hadoop本地模式安装 ####

Hadoop本地模式只是用于本地开发调试，或者快速安装体验Hadoop，这部分做简单的介绍。

#### 第三部分：Hadoop伪分布式模式安装 ####

学习Hadoop一般是在伪分布式模式下进行。这种模式是在一台机器上各个进程上运行Hadoop的各个模块，伪分布式的意思是虽然各个模块是在各个进程上分开运行的，但是只是运行在一个操作系统上的，并不是真正的分布式。

#### 第四部分：完全分布式安装 ####

完全分布式模式才是生产环境采用的模式，Hadoop运行在服务器集群上，生产环境一般都会做HA，以实现高可用。

#### 第五部分：Hadoop HA安装 ####

HA是指高可用，为了解决Hadoop单点故障问题，生产环境一般都做HA部署。这部分介绍了如何配置Hadoop2.x的高可用，并简单介绍了HA的工作原理。   
安装过程中，会穿插简单介绍涉及到的知识。希望能对大家有所帮助。

### 第一部分：Linux环境安装 ###

#### 第一步、配置Vmware NAT网络 ####

一、Vmware网络模式介绍

参考：[http://blog.csdn.net/collection4u/article/details/14127671][http_blog.csdn.net_collection4u_article_details_14127671]

二、NAT模式配置

NAT是网络地址转换，是在宿主机和虚拟机之间增加一个地址转换服务，负责外部和虚拟机之间的通讯转接和IP转换。

我们部署Hadoop集群，这里选择NAT模式，各个虚拟机通过NAT使用宿主机的IP来访问外网。

我们的要求是集群中的各个虚拟机有固定的IP、可以访问外网，所以进行如下设置：

1、 Vmware安装后，默认的NAT设置如下：

![enter image description here][]

2、 默认的设置是启动DHCP服务的，NAT会自动给虚拟机分配IP，但是我们需要将各个机器的IP固定下来，所以要取消这个默认设置。

3、 为机器设置一个子网网段，默认是192.168.136网段，我们这里设置为100网段，将来各个虚拟机Ip就为 192.168.100.\*。

4、 点击NAT设置按钮，打开对话框，可以修改网关地址和DNS地址。这里我们为NAT指定DNS地址。

![enter image description here][enter image description here 1]

5、 网关地址为当前网段里的.2地址，好像是固定的，我们不做修改，先记住网关地址就好了，后面会用到。

#### 第二步、安装Linux操作系统 ####

三、Vmware上安装Linux系统

1、 文件菜单选择新建虚拟机

2、 选择经典类型安装，下一步。

3、 选择稍后安装操作系统，下一步。

4、 选择Linux系统，版本选择CentOS 64位。

![enter image description here][enter image description here 2]

5、 命名虚拟机，给虚拟机起个名字，将来显示在Vmware左侧。并选择Linux系统保存在宿主机的哪个目录下，应该一个虚拟机保存在一个目录下，不能多个虚拟机使用一个目录。

![enter image description here][enter image description here 3]

6、 指定磁盘容量，是指定分给Linux虚拟机多大的硬盘，默认20G就可以，下一步。

7、 点击自定义硬件，可以查看、修改虚拟机的硬件配置，这里我们不做修改。

8、 点击完成后，就创建了一个虚拟机，但是此时的虚拟机还是一个空壳，没有操作系统，接下来安装操作系统。

9、 点击编辑虚拟机设置，找到DVD，指定操作系统ISO文件所在位置。

![enter image description here][enter image description here 4]

10、 点击开启此虚拟机，选择第一个回车开始安装操作系统。

![enter image description here][enter image description here 5]

11、 设置root密码。

![enter image description here][enter image description here 6]

12、 选择Desktop，这样就会装一个Xwindow。

![enter image description here][enter image description here 7]

13、 先不添加普通用户，其他用默认的，就把Linux安装完毕了。

四、设置网络

因为Vmware的NAT设置中关闭了DHCP自动分配IP功能，所以Linux还没有IP，需要我们设置网络各个参数。

1、 用root进入Xwindow，右击右上角的网络连接图标，选择修改连接。

![enter image description here][enter image description here 8]

2、 网络连接里列出了当前Linux里所有的网卡，这里只有一个网卡System eth0，点击编辑。

![enter image description here][enter image description here 9]

3、 配置IP、子网掩码、网关（和NAT设置的一样）、DNS等参数，因为NAT里设置网段为100.\*，所以这台机器可以设置为192.168.100.10网关和NAT一致，为192.168.100.2

![enter image description here][enter image description here 10]

4、 用ping来检查是否可以连接外网，如下图，已经连接成功。

![enter image description here][enter image description here 11]

五、修改Hostname

1、 临时修改hostname

[root@localhost Desktop]# hostname bigdata-senior01.chybinmy.com
      
       
        1

这种修改方式，系统重启后就会失效。

2、 永久修改hostname

想永久修改，应该修改配置文件 /etc/sysconfig/network。

命令：[root@bigdata-senior01 ~] vim /etc/sysconfig/network
      
       
        1

打开文件后，

NETWORKING=yes #使用网络 
        HOSTNAME=bigdata-senior01.chybinmy.com #设置主机名 
       
      
       
        1
        2

六、配置Host

命令：[root @bigdata-senior01 ~] vim /etc/hosts 
        添加hosts: 192.168 .100 .10 bigdata-senior01.chybinmy.com 
       
      
       
        1
        2

七、关闭防火墙

学习环境可以直接把防火墙关闭掉。

(1) 用root用户登录后，执行查看防火墙状态。

[root@bigdata-senior01 hadoop]# service iptables status
      
       
        1

(2) 用\[root@bigdata-senior01 hadoop\]\# service iptables stop关闭防火墙，这个是临时关闭防火墙。

[root @bigdata-senior01 hadoop- 2.5 .0]# service iptables stop 
        iptables: Setting chains to policy ACCEPT: filter [ OK ] 
        iptables: Flushing firewall rules: [ OK ] 
        iptables: Unloading modules: [ OK ] 
       
      
       
        1
        2
        3
        4

(3) 如果要永久关闭防火墙用。

[root@bigdata-senior01 hadoop]# chkconfig iptables off
      
       
        1

关闭，这种需要重启才能生效。

八、关闭selinux

selinux是Linux一个子安全机制，学习环境可以将它禁用。

[hadoop@bigdata-senior01 hadoop-2.5.0]$ vim /etc/sysconfig/selinux</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; 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box-sizing: border-box; max-width: 100%;"></p><h4 id="第三步安装jdk" style="margin: 0.8em 0px; padding: 0px; box-sizing: border-box; font-family: "microsoft yahei"; font-weight: 300; line-height: 1.1; color: rgb(63, 63, 63); font-size: 1.25em;"><a target="_blank" name="t9" style="color: rgb(79, 161, 219); box-sizing: border-box;"></a>第三步、安装JDK</h4><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">九、安装Java JDK</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 查看是否已经安装了java JDK。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[root<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 Desktop]# java –version</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">注意：Hadoop机器上的JDK，最好是Oracle的Java JDK，不然会有一些问题，比如可能没有JPS命令。 <br style="box-sizing: border-box;">如果安装了其他版本的JDK，卸载掉。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 安装java JDK</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">(1) 去下载Oracle版本Java JDK：jdk-7u67-linux-x64.tar.gz</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">(2) 将jdk-7u67-linux-x64.tar.gz解压到/opt/modules目录下</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[root<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 /]# tar -zxvf jdk-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">7</span></span>u67-linux-x64.tar.gz -C /opt/modules</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">(3) 添加环境变量</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">设置JDK的环境变量 JAVA_HOME。需要修改配置文件/etc/profile，追加</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">export JAVA_HOME=<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;"><span class="hljs-string">"/opt/modules/jdk1.7.0_67"</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">export PATH=$JAVA_HOME/bin:$PATH</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">修改完毕后，执行 source /etc/profile</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">(4)安装后再次执行 java –version,可以看见已经安装完成。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[root<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 /]# java -version</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">java version <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;"><span class="hljs-string">"1.7.0_67"</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">Java(TM) <span class="hljs-function">SE Runtime <span class="hljs-title">Environment</span> <span class="hljs-params">(build </span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-function"><span class="hljs-params"><span class="hljs-number">1.7</span></span></span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-function"><span class="hljs-params"><span class="hljs-number">.0</span></span></span></span><span class="hljs-function"><span class="hljs-params">_67-b01)</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">Java <span class="hljs-title">HotSpot</span><span class="hljs-params">(TM)</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-function">64</span></span><span class="hljs-function">-Bit Server <span class="hljs-title">VM</span> <span class="hljs-params">(build </span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-function"><span class="hljs-params"><span class="hljs-number">24.65</span></span></span></span><span class="hljs-function"><span class="hljs-params">-b04, mixed mode)</span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li></ul><div class="hljs-button" data-title="复制"></div></pre><h3 id="第二部分hadoop本地模式安装-1" style="margin: 0.8em 0px; padding: 0px; box-sizing: border-box; font-family: "microsoft yahei"; font-weight: 300; line-height: 1.1; color: rgb(63, 63, 63); font-size: 1.7em;"><a name="t2"></a><a target="_blank" name="t10" style="color: rgb(79, 161, 219); box-sizing: border-box;"></a>第二部分：Hadoop本地模式安装</h3><h4 id="第四步hadoop部署模式" style="margin: 0.8em 0px; padding: 0px; box-sizing: border-box; font-family: "microsoft yahei"; font-weight: 300; line-height: 1.1; color: rgb(63, 63, 63); font-size: 1.25em;"><a target="_blank" name="t11" style="color: rgb(79, 161, 219); box-sizing: border-box;"></a>第四步、Hadoop部署模式</h4><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">Hadoop部署模式有：本地模式、伪分布模式、完全分布式模式、HA完全分布式模式。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">区分的依据是NameNode、DataNode、ResourceManager、NodeManager等模块运行在几个JVM进程、几个机器。</p><table style="box-sizing: border-box; width: 945.778px; border-collapse: collapse; border-spacing: 0px; border: 1px solid rgb(238, 238, 238); color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><thead style="box-sizing: border-box;"><tr style="box-sizing: border-box;"><th style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">模式名称</th><th style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">各个模块占用的JVM进程数</th><th style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">各个模块运行在几个机器数上</th></tr></thead><tbody style="box-sizing: border-box;"><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">本地模式</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">1个</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">1个</td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">伪分布式模式</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">N个</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">1个</td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">完全分布式模式</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">N个</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">N个</td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">HA完全分布式</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">N个</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">N个</td></tr></tbody></table><h4 id="第五步本地模式部署" style="margin: 0.8em 0px; padding: 0px; box-sizing: border-box; font-family: "microsoft yahei"; font-weight: 300; line-height: 1.1; color: rgb(63, 63, 63); font-size: 1.25em;"><a target="_blank" name="t12" style="color: rgb(79, 161, 219); box-sizing: border-box;"></a>第五步、本地模式部署</h4><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">十、本地模式介绍</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">本地模式是最简单的模式，所有模块都运行与一个JVM进程中，使用的本地文件系统，而不是HDFS，本地模式主要是用于本地开发过程中的运行调试用。下载hadoop安装包后不用任何设置，默认的就是本地模式。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">十一、解压hadoop后就是直接可以使用</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 创建一个存放本地模式hadoop的目录</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 modules]$ mkdir /opt/modules/hadoopstandalone
      
       
        1

2、 解压hadoop文件

[hadoop@bigdata-senior01 modules]$ tar -zxf /opt/sofeware/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>.tar.gz  -C /opt/modules/hadoopstandalone/</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 确保JAVA_HOME环境变量已经配置好</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 modules]$ echo ${JAVA_HOME}</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">/opt/modules/jdk1<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.7</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>_67</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">十二、运行MapReduce程序，验证</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">我们这里用hadoop自带的wordcount例子来在本地模式下测试跑mapreduce。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 准备mapreduce输入文件wc.input</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 modules]$ cat /opt/data/wc.input

*  hadoop mapreduce hive
 *  hbase spark storm
 *  sqoop hadoop hive
 *  spark hadoop
 *   *  1
     *  2
     *  3
     *  4
     *  5
    
    2、 运行hadoop自带的mapreduce Demo
    
        [hadoop@bigdata-senior01 hadoopstandalone]$ bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>.jar wordcount /opt/data/wc.input output2</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/7492ce20-5cba-11e7-86d9-f17e4b747fa0" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">这里可以看到job ID中有local字样，说明是运行在本地模式下的。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 查看输出文件</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">本地模式下，mapreduce的输出是输出到本地。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoopstandalone]$ ll output2
            
             total 4 
             -rw-r--r-- 1 hadoop hadoop 60 Jul 7 12: 50 part-r- 00000 
             -rw-r--r-- 1 hadoop hadoop 0 Jul 7 12: 50 _SUCCESS 
             1 2 3 4
    
    输出目录中有\_SUCCESS文件说明JOB运行成功，part-r-00000是输出结果文件。   
     
    
    ### 第三部分：Hadoop伪分布式模式安装 ###
    
    #### 第六步、伪分布式Hadoop部署过程 ####
    
    十三、Hadoop所用的用户设置
    
    1、 创建一个名字为hadoop的普通用户
    
        [root @bigdata-senior01 ~]# useradd hadoop 
             [root @bigdata-senior01 ~]# passwd hadoop 
            
         
            
             1
             2
    
    2、 给hadoop用户sudo权限
    
        [root@bigdata-senior01 ~]# vim /etc/sudoers
         
            
             1
    
    设置权限，学习环境可以将hadoop用户的权限设置的大一些，但是生产环境一定要注意普通用户的权限限制。
    
        root ALL=(ALL) ALL 
             hadoop ALL=(root) NOPASSWD:ALL 
            
         
            
             1
             2
    
    注意：如果root用户无权修改sudoers文件，先手动为root用户添加写权限。
    
        [root@bigdata-senior01 ~]# chmod u+w /etc/sudoers
         
            
             1
    
    3、 切换到hadoop用户
    
        [root @bigdata-senior01 ~]# su - hadoop 
             [hadoop @bigdata-senior01 ~]$</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">4、 创建存放hadoop文件的目录</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 ~]$ sudo mkdir /opt/modules 1
    
    5、 将hadoop文件夹的所有者指定为hadoop用户
    
    如果存放hadoop的目录的所有者不是hadoop，之后hadoop运行中可能会有权限问题，那么就讲所有者改为hadoop。
    
        [hadoop@bigdata-senior01 ~]# sudo chown -R hadoop:hadoop /opt/modules
         
            
             1
    
    十四、解压Hadoop目录文件
    
    1、 复制hadoop-2.5.0.tar.gz到/opt/modules目录下。
    
    2、 解压hadoop-2.5.0.tar.gz
    
        [hadoop @bigdata-senior01 ~]# cd /opt/modules 
             [hadoop @bigdata-senior01 hadoop]# tar -zxvf hadoop- 2.5 .0.tar.gz 
            
         
            
             1
             2
    
    十五、配置Hadoop
    
    1、 配置Hadoop环境变量
    
        [hadoop@bigdata-senior01 hadoop]# vim /etc/profile
         
            
             1
    
    追加配置：
    
        export HADOOP_HOME= "/opt/modules/hadoop-2.5.0" 
             export PATH=$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$PATH</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">执行：source /etc/profile 使得配置生效</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">验证HADOOP_HOME参数：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 /]$ echo $HADOOP_HOME</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">/opt/modules/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 配置 hadoop-env.sh、mapred-env.sh、yarn-env.sh文件的JAVA_HOME参数</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 ~]$ sudo vim ${HADOOP_HOME}/etc/hadoop/hadoop-env.sh</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">修改JAVA_HOME参数为：</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">export JAVA_HOME=<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;"><span class="hljs-string">"/opt/modules/jdk1.7.0_67"</span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 配置core-site.xml</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/85acb450-5cba-11e7-8ca5-edc6aa6f5290" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">[hadoop@bigdata-senior01 ~]<span class="MathJax_Preview" style="box-sizing: border-box; color: rgb(136, 136, 136);"></span>{HADOOP_HOME}/etc/hadoop/core-site.xml</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">（1） fs.defaultFS参数配置的是HDFS的地址。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>fs.defaultFS<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>hdfs://bigdata-senior01.chybinmy.com:8020<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">（2） <code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">hadoop.tmp.dir</code>配置的是Hadoop临时目录，比如HDFS的NameNode数据默认都存放这个目录下，查看<code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">*-default.xml</code>等默认配置文件，就可以看到很多依赖<code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">${hadoop.tmp.dir}的配置。 默认的hadoop.tmp.dir是/tmp/hadoop-${user.name}</code>,此时有个问题就是NameNode会将HDFS的元数据存储在这个/tmp目录下，如果操作系统重启了，系统会清空/tmp目录下的东西，导致NameNode元数据丢失，是个非常严重的问题，所有我们应该修改这个路径。</p><ul style="box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><li style="box-sizing: border-box;">创建临时目录：</li></ul><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"> [hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sudo mkdir -p /opt/data/tmp 1
    
     *  将临时目录的所有者修改为hadoop
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ sudo chown –R hadoop:hadoop /opt/data/tmp</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><ul style="box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><li style="box-sizing: border-box;">修改hadoop.tmp.dir</li></ul><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">   <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>hadoop.tmp.dir<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>/opt/data/tmp<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">十六、配置、格式化、启动HDFS</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 配置hdfs-site.xml</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/90cfa810-5cba-11e7-86d9-f17e4b747fa0" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ vim ${HADOOP_HOME}/etc/hadoop/hdfs-site.xml</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">       <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>dfs.replication<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">       <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>1<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">dfs.replication配置的是HDFS存储时的备份数量，因为这里是伪分布式环境只有一个节点，所以这里设置为1。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 格式化HDFS</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/a037bf90-5cba-11e7-8ca5-edc6aa6f5290" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 ~]$ hdfs namenode –format
         
            
             1
    
    格式化是对HDFS这个分布式文件系统中的DataNode进行分块，统计所有分块后的初始元数据的存储在NameNode中。
    
    格式化后，查看core-site.xml里hadoop.tmp.dir（本例是/opt/data目录）指定的目录下是否有了dfs目录，如果有，说明格式化成功。
    
    注意：
    
    1.  格式化时，这里注意hadoop.tmp.dir目录的权限问题，应该hadoop普通用户有读写权限才行，可以将/opt/data的所有者改为hadoop。   
        \[hadoop@bigdata-senior01 hadoop-2.5.0\]sudo chown -R hadoop:hadoop /opt/data</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">查看NameNode格式化后的目录。</p></li></ol><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-java hljs  has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">   \[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 ~\] sudo chown -R hadoop:hadoop /opt/data</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">查看NameNode格式化后的目录。</p></li></ol><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-java hljs  has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">   \[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 ~\]  ll /opt/data/tmp/dfs/name/current
        
         *  1
        
        ![enter image description here][enter image description here 12]
        
        fsimage是NameNode元数据在内存满了后，持久化保存到的文件。
        
        `fsimage*.md5` 是校验文件，用于校验fsimage的完整性。
        
        `seen_txid` 是hadoop的版本
        
        vession文件里保存：
        
         *  namespaceID：NameNode的唯一ID。
         *  clusterID:集群ID，NameNode和DataNode的集群ID应该一致，表明是一个集群。
        
            #Mon Jul 04 17: 25: 50 CST 2016 
                   namespaceID= 2101579007 
                   clusterID=CID- 205277e6- 493b- 4601- 8e33-c09d1d23ece4 
                   cTime= 0 
                   storageType=NAME_NODE 
                   blockpoolID=BP- 1641019026- 127.0 .0 .1- 1467624350057 
                   layoutVersion=- 57 
                  
               
                  
                   1
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                   3
                   4
                   5
                   6
                   7
        
        3、 启动NameNode
        
            [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ ${HADOOP_HOME}/sbin/hadoop-daemon.sh start namenode 
                   starting namenode, logging to /opt/modules/hadoop- 2.5 .0/logs/hadoop-hadoop-namenode-bigdata-senior01.chybinmy.com.out 
                  
               
                  
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        ![enter image description here][enter image description here 13]
        
        4、 启动DataNode
        
            [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ ${HADOOP_HOME}/sbin/hadoop-daemon.sh start datanode 
                   starting datanode, logging to /opt/modules/hadoop- 2.5 .0/logs/hadoop-hadoop-datanode-bigdata-senior01.chybinmy.com.out 
                  
               
                  
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        ![enter image description here][enter image description here 14]
        
        5、 启动SecondaryNameNode
        
            [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ ${HADOOP_HOME}/sbin/hadoop-daemon.sh start secondarynamenode 
                   starting secondarynamenode, logging to /opt/modules/hadoop- 2.5 .0/logs/hadoop-hadoop-secondarynamenode-bigdata-senior01.chybinmy.com.out 
                  
               
                  
                   1
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        ![enter image description here][enter image description here 15]
        
        6、 JPS命令查看是否已经启动成功，有结果就是启动成功了。
        
            [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ jps</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3034</span></span> NameNode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3233</span></span> Jps</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3193</span></span> SecondaryNameNode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3110</span></span> DataNode</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/f36a1e60-5cba-11e7-8ca5-edc6aa6f5290" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">7、 HDFS上测试创建目录、上传、下载文件</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">HDFS上创建目录</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ ${HADOOP_HOME}/bin/hdfs dfs -mkdir /demo1</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">上传本地文件到HDFS上</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ ${HADOOP_HOME}/bin/hdfs dfs -put </div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">${HADOOP_HOME}/etc/hadoop/core-site.xml /demo1 
                  
               
                  
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        读取HDFS上的文件内容
        
            [hadoop@bigdata-senior01 hadoop-2.5.0]$ ${HADOOP_HOME}/bin/hdfs dfs -cat /demo1/core-site.xml
               
                  
                   1
        
        ![enter image description here][enter image description here 16]
        
        从HDFS上下载文件到本地
        
            [hadoop@bigdata-senior01 hadoop-2.5.0]$ bin/hdfs dfs -get /demo1/core-site.xml</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/08da3f50-5cbb-11e7-8ca5-edc6aa6f5290" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><h4 id="十七配置启动yarn" style="margin: 0.8em 0px; padding: 0px; box-sizing: border-box; font-family: "microsoft yahei"; font-weight: 300; line-height: 1.1; color: rgb(63, 63, 63); font-size: 1.25em;"><a target="_blank" name="t15" style="color: rgb(79, 161, 219); box-sizing: border-box;"></a>十七、配置、启动YARN</h4><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 配置mapred-site.xml</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">默认没有mapred-site.xml文件，但是有个mapred-site.xml.template配置模板文件。复制模板生成mapred-site.xml。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]# cp etc/hadoop/mapred-site.xml.template etc/hadoop/mapred-site.xml</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">添加配置如下：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>mapreduce.framework.name<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>yarn<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">指定mapreduce运行在yarn框架上。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/2de68010-5cbb-11e7-8ca5-edc6aa6f5290" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 配置yarn-site.xml</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">添加配置如下：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.nodemanager.aux-services<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>mapreduce_shuffle<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.resourcemanager.hostname<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>bigdata-senior01.chybinmy.com<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">7</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">8</li></ul><div class="hljs-button" data-title="复制"></div></pre><ul style="box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">yarn.nodemanager.aux-services配置了yarn的默认混洗方式，选择为mapreduce的默认混洗算法。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">yarn.resourcemanager.hostname指定了Resourcemanager运行在哪个节点上。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;"><img src="http://images.gitbook.cn/dff66250-5cbd-11e7-b8ee-cfb7eda16afc" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p></li></ul><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 启动Resourcemanager</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ ${HADOOP_HOME}/sbin/yarn-daemon.sh start resourcemanager</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/e9a9e790-5cbd-11e7-8ca5-edc6aa6f5290" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">4、 启动nodemanager</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ ${HADOOP_HOME}/sbin/yarn-daemon.sh start nodemanager</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/f03f8b00-5cbd-11e7-b8ee-cfb7eda16afc" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">5、 查看是否启动成功</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ jps
    2.  3034 NameNode
    3.  4439 NodeManager
    4.  4197 ResourceManager
    5.  4543 Jps
    6.  3193 SecondaryNameNode
    7.  3110 DataNode
    
     *  1
     *  2
     *  3
     *  4
     *  5
     *  6
     *  7
    
    可以看到ResourceManager、NodeManager已经启动成功了。
    
    ![enter image description here][enter image description here 17]
    
    6、 YARN的Web页面
    
    YARN的Web客户端端口号是8088，通过[http://192.168.100.10:8088/][http_192.168.100.10_8088]可以查看。
    
    ![enter image description here][enter image description here 18]
    
    十八、运行MapReduce Job
    
    在Hadoop的share目录里，自带了一些jar包，里面带有一些mapreduce实例小例子，位置在share/hadoop/mapreduce/hadoop-mapreduce-examples-2.5.0.jar，可以运行这些例子体验刚搭建好的Hadoop平台，我们这里来运行最经典的WordCount实例。
    
    1、 创建测试用的Input文件
    
    创建输入目录:
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ bin/hdfs dfs -mkdir -p /wordcountdemo/input</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">创建原始文件:</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">在本地/opt/data目录创建一个文件wc.input,内容如下。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/178763e0-5cbe-11e7-86d9-f17e4b747fa0" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">将wc.input文件上传到HDFS的/wordcountdemo/input目录中:</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ bin/hdfs dfs -put /opt/data/wc.input /wordcountdemo/input
         
            
             1
    
    ![enter image description here][enter image description here 19]
    
    2、 运行WordCount MapReduce Job
    
        [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ bin/yarn jar share/hadoop/mapreduce/hadoop-mapreduce-examples-</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>.jar wordcount /wordcountdemo/input /wordcountdemo/output</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/268f32f0-5cbe-11e7-8185-21ba04c77532" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 查看输出结果目录</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ bin/hdfs dfs -ls /wordcountdemo/output 
             -rw-r--r-- 1 hadoop supergroup 0 2016- 07- 05 05: 12 /wordcountdemo/output/_SUCCESS 
             -rw-r--r-- 1 hadoop supergroup 60 2016- 07- 05 05: 12 /wordcountdemo/output/part-r- 00000 
            
         
            
             1
             2
             3
    
    ![enter image description here][enter image description here 20]
    
     *  output目录中有两个文件，\_SUCCESS文件是空文件，有这个文件说明Job执行成功。
     *  part-r-00000文件是结果文件，其中-r-说明这个文件是Reduce阶段产生的结果，mapreduce程序执行时，可以没有reduce阶段，但是肯定会有map阶段，如果没有reduce阶段这个地方有是-m-。
     *  一个reduce会产生一个part-r-开头的文件。
     *  查看输出文件内容。
    
        [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ bin/hdfs dfs -cat /wordcountdemo/output/part-r-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">00000</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">hadoop <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">hbase <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">1</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">hive <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">mapreduce <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">1</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">spark <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">sqoop <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">1</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">storm <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">1</span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">7</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">8</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">结果是按照键值排好序的。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">十九、停止Hadoop</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> [hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/hadoop-daemon.sh stop namenode 
             stopping namenode 
             [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ sbin/hadoop-daemon.sh stop datanode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">stopping datanode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/yarn-daemon.sh stop resourcemanager 
             stopping resourcemanager 
             [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ sbin/yarn-daemon.sh stop nodemanager</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">stopping nodemanager</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">7</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">8</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/3c58e590-5cbe-11e7-86d9-f17e4b747fa0" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">二十、 Hadoop各个功能模块的理解</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 HDFS模块</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">HDFS负责大数据的存储，通过将大文件分块后进行分布式存储方式，突破了服务器硬盘大小的限制，解决了单台机器无法存储大文件的问题，HDFS是个相对独立的模块，可以为YARN提供服务，也可以为HBase等其他模块提供服务。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 YARN模块</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">YARN是一个通用的资源协同和任务调度框架，是为了解决Hadoop1.x中MapReduce里NameNode负载太大和其他问题而创建的一个框架。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">YARN是个通用框架，不止可以运行MapReduce，还可以运行Spark、Storm等其他计算框架。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 MapReduce模块</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">MapReduce是一个计算框架，它给出了一种数据处理的方式，即通过Map阶段、Reduce阶段来分布式地流式处理数据。它只适用于大数据的离线处理，对实时性要求很高的应用不适用。</p><h4 id="第七步开启历史服务" style="margin: 0.8em 0px; padding: 0px; box-sizing: border-box; font-family: "microsoft yahei"; font-weight: 300; line-height: 1.1; color: rgb(63, 63, 63); font-size: 1.25em;"><a target="_blank" name="t16" style="color: rgb(79, 161, 219); box-sizing: border-box;"></a>第七步、开启历史服务</h4><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">二十一、历史服务介绍</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">Hadoop开启历史服务可以在web页面上查看Yarn上执行job情况的详细信息。可以通过历史服务器查看已经运行完的Mapreduce作业记录，比如用了多少个Map、用了多少个Reduce、作业提交时间、作业启动时间、作业完成时间等信息。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">二十二、开启历史服务</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/mr-jobhistory-daemon.sh start historyserver、 1
    
    开启后，可以通过Web页面查看历史服务器：
    
    [http://bigdata-senior01.chybinmy.com:19888/][http_bigdata-senior01.chybinmy.com_19888]
    
    二十三、Web查看job执行历史
    
    1、 运行一个mapreduce任务
    
        [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ bin/yarn jar share/hadoop/mapreduce/hadoop-mapreduce-examples-</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>.jar wordcount /wordcountdemo/input /wordcountdemo/output1</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 job执行中</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/477f82d0-5cbe-11e7-8185-21ba04c77532" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 查看job历史</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/50e9ca10-5cbe-11e7-86d9-f17e4b747fa0" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/57a39750-5cbe-11e7-b8ee-cfb7eda16afc" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">历史服务器的Web端口默认是19888，可以查看Web界面。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">但是在上面所显示的某一个Job任务页面的最下面，Map和Reduce个数的链接上，点击进入Map的详细信息页面，再查看某一个Map或者Reduce的详细日志是看不到的，是因为没有开启日志聚集服务。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">二十四、开启日志聚集</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">4、 日志聚集介绍</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">MapReduce是在各个机器上运行的，在运行过程中产生的日志存在于各个机器上，为了能够统一查看各个机器的运行日志，将日志集中存放在HDFS上，这个过程就是日志聚集。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">5、 开启日志聚集</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">配置日志聚集功能：</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">Hadoop默认是不启用日志聚集的。在yarn-site.xml文件里配置启用日志聚集。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.log-aggregation-enable<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>true<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.log-aggregation.retain-seconds<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>106800<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">7</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">8</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">yarn.log-aggregation-enable:是否启用日志聚集功能。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">yarn.log-aggregation.retain-seconds：设置日志保留时间，单位是秒。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">将配置文件分发到其他节点：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln" style="width:1166px"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop]$ scp /opt/modules/hadoop- 2.5 .0/etc/hadoop/yarn-site.xml bigdata-senior02.chybinmy.com:/opt/modules/hadoop- 2.5 .0/etc/hadoop/ 
             [hadoop @bigdata-senior01 hadoop]$ scp /opt/modules/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>/etc/hadoop/yarn-site.xml bigdata-senior03.chybinmy.com:/opt/modules/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>/etc/hadoop/</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">重启Yarn进程：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/stop-yarn.sh 
             [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ sbin/start-yarn.sh</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">重启HistoryServer进程：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/mr-jobhistory-daemon.sh stop historyserver 
             [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ sbin/mr-jobhistory-daemon.sh start historyserver</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">6、 测试日志聚集</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">运行一个demo MapReduce，使之产生日志：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">bin/yarn jar share/hadoop/mapreduce/hadoop-mapreduce-examples-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>.jar wordcount /input /output1</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">查看日志：</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">运行Job后，就可以在历史服务器Web页面查看各个Map和Reduce的日志了。 <br style="box-sizing: border-box;"> </p><h3 id="第四部分完全分布式安装-1" style="margin: 0.8em 0px; padding: 0px; box-sizing: border-box; font-family: "microsoft yahei"; font-weight: 300; line-height: 1.1; color: rgb(63, 63, 63); font-size: 1.7em;"><a name="t4"></a><a target="_blank" name="t17" style="color: rgb(79, 161, 219); box-sizing: border-box;"></a>第四部分：完全分布式安装</h3><h4 id="第八步完全布式环境部署hadoop" style="margin: 0.8em 0px; padding: 0px; box-sizing: border-box; font-family: "microsoft yahei"; font-weight: 300; line-height: 1.1; color: rgb(63, 63, 63); font-size: 1.25em;"><a target="_blank" name="t18" style="color: rgb(79, 161, 219); box-sizing: border-box;"></a>第八步、完全布式环境部署Hadoop</h4><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">完全分部式是真正利用多台Linux主机来进行部署Hadoop，对Linux机器集群进行规划，使得Hadoop各个模块分别部署在不同的多台机器上。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">二十五、环境准备</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 克隆虚拟机</p><ul style="box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">Vmware左侧选中要克隆的机器，这里对原有的BigData01机器进行克隆，虚拟机菜单中，选中管理菜单下的克隆命令。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">选择“创建完整克隆”，虚拟机名称为BigData02，选择虚拟机文件保存路径，进行克隆。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">再次克隆一个名为BigData03的虚拟机。</p></li></ul><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 配置网络</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">修改网卡名称：</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">在BigData02和BigData03机器上编辑网卡信息。执行sudo vim /etc/udev/rules.d/70-persistent-net.rules命令。因为是从BigData01机器克隆来的，所以会保留BigData01的网卡eth0，并且再添加一个网卡eth1。并且eth0的Mac地址和BigData01的地址是一样的，Mac地址不允许相同，所以要删除eth0，只保留eth1网卡，并且要将eth1改名为eth0。将修改后的eth0的mac地址复制下来，修改network-scripts文件中的HWADDR属性。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">sudo vim /etc/sysconfig/network-scripts/ifcfg-eth0</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/692fc750-5cbe-11e7-8ca5-edc6aa6f5290" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">修改网络参数：</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">BigData02机器IP改为192.168.100.12</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">BigData03机器IP改为192.168.100.13</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 配置Hostname</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">BigData02配置hostname为 bigdata-senior02.chybinmy.com</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">BigData03配置hostname为 bigdata-senior03.chybinmy.com</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">4、 配置hosts</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">BigData01、BigData02、BigData03三台机器hosts都配置为：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop@bigdata-senior01 hadoop-2.5.0]$ sudo vim /etc/hosts 
             192.168.100.10 bigdata-senior01.chybinmy.com 
             192.168.100.12 bigdata-senior02.chybinmy.com 
             192.168.100.13 bigdata-senior03.chybinmy.com 
            
         
            
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    5、 配置Windows上的SSH客户端
    
    在本地Windows中的SSH客户端上添加对BigData02、BigData03机器的SSH链接。
    
    二十六、服务器功能规划
    
    <table> 
     <thead> 
      <tr> 
       <th>bigdata-senior01.chybinmy.com</th> 
       <th>bigdata-senior02.chybinmy.com</th> 
       <th>bigdata-senior03.chybinmy.com</th> 
      </tr> 
     </thead> 
     <tbody> 
      <tr> 
       <td>NameNode</td> 
       <td>ResourceManage</td> 
       <td>&nbsp;</td> 
      </tr> 
      <tr> 
       <td>DataNode</td> 
       <td>DataNode</td> 
       <td>DataNode</td> 
      </tr> 
      <tr> 
       <td>NodeManager</td> 
       <td>NodeManager</td> 
       <td>NodeManager</td> 
      </tr> 
      <tr> 
       <td>HistoryServer</td> 
       <td>&nbsp;</td> 
       <td>SecondaryNameNode</td> 
      </tr> 
     </tbody> 
    </table>
    
    二十七、在第一台机器上安装新的Hadoop
    
    为了和之前BigData01机器上安装伪分布式Hadoop区分开来，我们将BigData01上的Hadoop服务都停止掉，然后在一个新的目录/opt/modules/app下安装另外一个Hadoop。   
    我们采用先在第一台机器上解压、配置Hadoop，然后再分发到其他两台机器上的方式来安装集群。
    
    6、 解压Hadoop目录：
    
        [hadoop@bigdata-senior01 modules]$ tar -zxf /opt/sofeware/hadoop-2.5.0.tar.gz -C /opt/modules/app/</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">7、 配置Hadoop JDK路径修改hadoop-env.sh、mapred-env.sh、yarn-env.sh文件中的JDK路径：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">export JAVA_HOME="/opt/modules/jdk1.7.0_67"</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">8、 配置core-site.xml</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop@bigdata-senior01 hadoop-2.5.0]$ vim etc/hadoop/core-site.xml
         
            
             1
    
        <configuration> 
             <property> 
             <name>fs.defaultFS </name> 
             <value>hdfs://bigdata-senior01.chybinmy.com:8020 </value> 
             </property> 
             <property> 
             <name>hadoop.tmp.dir </name> 
             <value>/opt/modules/app/hadoop-2.5.0/data/tmp </value> 
             </property> 
             </configuration> 
            
         
            
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    fs.defaultFS为NameNode的地址。
    
    hadoop.tmp.dir为hadoop临时目录的地址，默认情况下，NameNode和DataNode的数据文件都会存在这个目录下的对应子目录下。应该保证此目录是存在的，如果不存在，先创建。
    
    9、 配置hdfs-site.xml
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ vim etc/hadoop/hdfs-site.xml</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">configuration</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">   <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>dfs.namenode.secondary.http-address<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">   <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>bigdata-senior03.chybinmy.com:50090<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">configuration</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">dfs.namenode.secondary.http-address是指定secondaryNameNode的http访问地址和端口号，因为在规划中，我们将BigData03规划为SecondaryNameNode服务器。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">所以这里设置为：bigdata-senior03.chybinmy.com:50090</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">10、 配置slaves</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop@bigdata-senior01 hadoop-2.5.0]$ vim etc/hadoop/slaves
            
             bigdata-senior01.chybinmy.com 
             bigdata-senior02.chybinmy.com 
             bigdata-senior03.chybinmy.com 
             1 2 3 4
    
    slaves文件是指定HDFS上有哪些DataNode节点。
    
    11、 配置yarn-site.xml
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ vim etc/hadoop/yarn-site.xml</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.nodemanager.aux-services<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>mapreduce_shuffle<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.resourcemanager.hostname<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>bigdata-senior02.chybinmy.com<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="9"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="10"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.log-aggregation-enable<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="11"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>true<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="12"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="13"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="14"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.log-aggregation.retain-seconds<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="15"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>106800<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="16"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">7</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">8</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">9</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">10</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">11</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">12</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">13</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">14</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">15</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">16</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">根据规划<code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">yarn.resourcemanager.hostname</code>这个指定resourcemanager服务器指向<code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">bigdata-senior02.chybinmy.com</code>。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">yarn.log-aggregation-enable</code>是配置是否启用日志聚集功能。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">yarn.log-aggregation.retain-seconds</code>是配置聚集的日志在HDFS上最多保存多长时间。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">12、 配置mapred-site.xml</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">从mapred-site.xml.template复制一个mapred-site.xml文件。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop@bigdata-senior01 hadoop-2.5.0]$ cp etc/hadoop/mapred-site.xml.template etc/hadoop/mapred-site.xml
         
            
             1
    
        <configuration> 
             <property> 
             <name>mapreduce.framework.name </name> 
             <value>yarn </value> 
             </property> 
             <property> 
             <name>mapreduce.jobhistory.address </name> 
             <value>bigdata-senior01.chybinmy.com:10020 </value> 
             </property> 
             <property> 
             <name>mapreduce.jobhistory.webapp.address </name> 
             <value>bigdata-senior01.chybinmy.com:19888 </value> 
             </property> 
             </configuration> 
            
         
            
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    mapreduce.framework.name设置mapreduce任务运行在yarn上。
    
    mapreduce.jobhistory.address是设置mapreduce的历史服务器安装在BigData01机器上。
    
    mapreduce.jobhistory.webapp.address是设置历史服务器的web页面地址和端口号。
    
    二十八、设置SSH无密码登录
    
    Hadoop集群中的各个机器间会相互地通过SSH访问，每次访问都输入密码是不现实的，所以要配置各个机器间的
    
    SSH是无密码登录的。
    
    1、 在BigData01上生成公钥
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ ssh-keygen -t rsa</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">一路回车，都设置为默认值，然后再当前用户的Home目录下的<code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">.ssh</code>目录中会生成公钥文件<code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">（id_rsa.pub）</code>和私钥文件<code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">（id_rsa）</code>。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 分发公钥</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop@bigdata-senior01 hadoop-2.5.0]$ ssh-copy-id bigdata-senior01.chybinmy.com
            
             [hadoop@bigdata-senior01 hadoop-2.5.0]$ ssh-copy-id bigdata-senior02.chybinmy.com</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop@bigdata-senior01 hadoop-2.5.0]$ ssh-copy-id bigdata-senior03.chybinmy.com 
             1 2 3
    
    3、 设置BigData02、BigData03到其他机器的无密钥登录
    
    同样的在BigData02、BigData03上生成公钥和私钥后，将公钥分发到三台机器上。
    
    二十九、分发Hadoop文件
    
    1、 首先在其他两台机器上创建存放Hadoop的目录
    
        [hadoop@bigdata-senior02 ~]$ mkdir /opt/modules/app</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop@bigdata-senior03 ~]$ mkdir /opt/modules/app 
            
         
            
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    2、 通过Scp分发
    
    Hadoop根目录下的share/doc目录是存放的hadoop的文档，文件相当大，建议在分发之前将这个目录删除掉，可以节省硬盘空间并能提高分发的速度。
    
    doc目录大小有1.6G。
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ du -sh /opt/modules/app/hadoop-2.5.0/share/doc</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">1.6G /opt/modules/app/hadoop-2.5.0/share/doc</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop@bigdata-senior01 hadoop-2.5.0]$ scp -r /opt/modules/app/hadoop-2.5.0/ bigdata-senior02.chybinmy.com:/opt/modules/app 
             [hadoop@bigdata-senior01 hadoop-2.5.0]$ scp -r /opt/modules/app/hadoop-2.5.0/ bigdata-senior03.chybinmy.com:/opt/modules/app</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">三十、格式NameNode</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">在NameNode机器上执行格式化：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop@bigdata-senior01 hadoop-2.5.0]$ /opt/modules/app/hadoop-2.5.0/bin/hdfs namenode –format 1
    
    注意：
    
    如果需要重新格式化NameNode,需要先将原来NameNode和DataNode下的文件全部删除，不然会报错，NameNode和DataNode所在目录是在`core-site.xml`中`hadoop.tmp.dir`、`dfs.namenode.name.dir`、`dfs.datanode.data.dir`属性配置的。
    
        <property> 
             <name>hadoop.tmp.dir </name> 
             <value>/opt/data/tmp </value> 
             </property> 
             <property> 
             <name>dfs.namenode.name.dir </name> 
             <value>file://${hadoop.tmp.dir}/dfs/name<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="9"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="10"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>dfs.datanode.data.dir<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="11"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>file://${hadoop.tmp.dir}/dfs/data </value> 
             </property> 
            
         
            
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    因为每次格式化，默认是创建一个集群ID，并写入NameNode和DataNode的VERSION文件中（VERSION文件所在目录为dfs/name/current 和 dfs/data/current），重新格式化时，默认会生成一个新的集群ID,如果不删除原来的目录，会导致namenode中的VERSION文件中是新的集群ID,而DataNode中是旧的集群ID，不一致时会报错。
    
    另一种方法是格式化时指定集群ID参数，指定为旧的集群ID。
    
    三十一、启动集群
    
    1、 启动HDFS
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ /opt/modules/app/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>/sbin/start-dfs.sh</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/7c4619c0-5cbe-11e7-8ca5-edc6aa6f5290" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 启动YARN</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ /opt/modules/app/hadoop-2.5.0/sbin/start-yarn.sh
         
            
             1
    
    在BigData02上启动ResourceManager:
    
        [hadoop@bigdata-senior02 hadoop-2.5.0]$ sbin/yarn-daemon.sh start resourcemanager</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/98a56fd0-5cbe-11e7-8ca5-edc6aa6f5290" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 启动日志服务器</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">因为我们规划的是在BigData03服务器上运行MapReduce日志服务，所以要在BigData03上启动。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln" style="width:1040px"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior03 ~]$ /opt/modules/app/hadoop-2.5.0/sbin/mr-jobhistory-daemon.sh start historyserver
            
             starting historyserver, logging to /opt/modules/app/hadoop- 2.5 .0/logs/mapred-hadoop-historyserver-bigda ta-senior03.chybinmy.com.out 
             1 2
    
        [hadoop @bigdata-senior03 ~]$ jps</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3570</span></span> Jps</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3537</span></span> JobHistoryServer</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3310</span></span> SecondaryNameNode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3213</span></span> DataNode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3392</span></span> NodeManager</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">4、 查看HDFS Web页面</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><a target="_blank" href="http://bigdata-senior01.chybinmy.com:50070/" rel="nofollow" style="color: rgb(79, 161, 219); text-decoration-line: none; box-sizing: border-box;">http://bigdata-senior01.chybinmy.com:50070/</a></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">5、 查看YARN Web 页面</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><a target="_blank" href="http://bigdata-senior02.chybinmy.com:8088/cluster" rel="nofollow" style="color: rgb(79, 161, 219); text-decoration-line: none; box-sizing: border-box;">http://bigdata-senior02.chybinmy.com:8088/cluster</a></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">三十二、测试Job</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">我们这里用hadoop自带的wordcount例子来在本地模式下测试跑mapreduce。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 准备mapreduce输入文件wc.input</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 modules]$ cat /opt/data/wc.input 
             hadoop mapreduce hive 
             hbase spark storm 
             sqoop hadoop hive 
             spark hadoop 
            
         
            
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             5
    
    2、 在HDFS创建输入目录input
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ bin/hdfs dfs -mkdir /input</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 将wc.input上传到HDFS</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ bin/hdfs dfs -put /opt/data/wc.input /input/wc.input
         
            
             1
    
    4、 运行hadoop自带的mapreduce Demo
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ bin/yarn jar share/hadoop/mapreduce/hadoop-mapreduce-examples-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>.jar wordcount /input/wc.input /output</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/a5cbfbc0-5cbe-11e7-8185-21ba04c77532" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">5、 查看输出文件</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ bin/hdfs dfs -ls /output
            
             Found 2 items 
             -rw-r--r-- 3 hadoop supergroup 0 2016- 07- 14 16: 36 /output/_SUCCESS 
             -rw-r--r-- 3 hadoop supergroup 60 2016- 07- 14 16: 36 /output/part-r- 00000 
             1 2 3 4
    
    ### 第五部分：Hadoop HA安装 ###
    
    HA的意思是High Availability高可用，指当当前工作中的机器宕机后，会自动处理这个异常，并将工作无缝地转移到其他备用机器上去，以来保证服务的高可用。
    
    HA方式安装部署才是最常见的生产环境上的安装部署方式。Hadoop HA是Hadoop 2.x中新添加的特性，包括NameNode HA 和 ResourceManager HA。因为DataNode和NodeManager本身就是被设计为高可用的，所以不用对他们进行特殊的高可用处理。
    
    第九步、时间服务器搭建
    
    Hadoop对集群中各个机器的时间同步要求比较高，要求各个机器的系统时间不能相差太多，不然会造成很多问题。可以配置集群中各个机器和互联网的时间服务器进行时间同步，但是在实际生产环境中，集群中大部分服务器是不能连接外网的，这时候可以在内网搭建一个自己的时间服务器（NTP服务器），集群的各个机器与这个时间服务器进行时间同步。
    
    三十三、配置NTP服务器
    
    我们选择第三台机器（bigdata-senior03.chybinmy.com）为NTF服务器，其他机器和这台机器进行同步。
    
    1、 检查ntp服务是否已经安装
    
        [hadoop @bigdata-senior03 data]$ sudo rpm -qa | grep ntp</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">ntpdate-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">4.2</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.6</span>p5-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">1</span>.</span>el6.centos.x86_64</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">ntp-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">4.2</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.6</span>p5-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">1</span>.</span>el6.centos.x86_64</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">显示已经安装过了ntp程序，其中<code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">ntpdate-4.2.6p5-1.el6.centos.x86_64</code> 是用来和某台服务器进行同步的，<code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">ntp-4.2.6p5-1.el6.centos.x86_64</code>是用来提供时间同步服务的。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 修改配置文件ntp.conf</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior03 data]$ vim /etc/ntp.conf 1
    
    启用restrice,修改网段
    
    restrict 192.168.100.0 mask 255.255.255.0 nomodify notrap   
    将这行的注释去掉，并且将网段改为集群的网段，我们这里是100网段。
    
    注释掉server域名配置
    
        #server 0.centos.pool.ntp.org iburst 
             #server 1.centos.pool.ntp.org iburst 
             #server 2.centos.pool.ntp.org iburst 
             #server 3.centos.pool.ntp.org iburst 
            
         
            
             1
             2
             3
             4
    
    是时间服务器的域名，这里不需要连接互联网，所以将他们注释掉。
    
    修改
    
    server 127.127.1.0
    
    fudge 127.127.1.0 stratum 10
    
    3、 修改配置文件ntpd
    
        [hadoop@bigdata-senior03 ~]$ sudo vim /etc/sysconfig/ntpd</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">添加一行配置：SYNC_CLOCK=yes</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/c8db0cf0-5cbe-11e7-b8ee-cfb7eda16afc" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">4、 启动ntp服务</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior03 ~]$ sudo chkconfig ntpd on
         
            
             1
    
    这样每次机器启动时，ntp服务都会自动启动。
    
    三十四、配置其他机器的同步
    
    切换到root用户进行配置通过contab进行定时同步：
    
        [root @bigdata-senior02 hadoop]# crontab -e 
             */ 10 * * * * /usr/sbin/ntpdate bigdata-senior03.chybinmy.com 
             [root @bigdata-senior02 hadoop]# crontab -e 
             */ 10 * * * * /usr/sbin/ntpdate bigdata-senior03.chybinmy.com 
            
         
            
             1
             2
             3
             4
    
    三十五、 测试同步是否有效
    
    1、 查看目前三台机器的时间
    
        [hadoop @bigdata-senior03 ~]$ date <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;"><span class="hljs-string">"+%Y-%m-%d %H:%M:%S"</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2016</span></span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">09</span></span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">23</span></span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">16</span></span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">43</span></span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">56</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior02 ~]$ date "+%Y-%m-%d %H:%M:%S" 
             2016- 09- 23 16: 44: 08 
             [hadoop @bigdata-senior01 data]$ date <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;"><span class="hljs-string">"+%Y-%m-%d %H:%M:%S"</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2016</span></span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">09</span></span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">23</span></span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">16</span></span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">44</span></span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">18</span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 修改bigdata-senior01上的时间</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">将时间改为一个以前的时间：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 data]$ sudo date -s '2016-01-01 00:00:00' 
             Fri Jan 1 00: 00: 00 CST 2016 
             [hadoop @bigdata-senior01 data]$ date <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;"><span class="hljs-string">"+%Y-%m-%d %H:%M:%S"</span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2016</span></span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">01</span></span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">01</span></span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">00</span></span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">00</span></span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">05</span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">等10分钟，看是否可以实现自动同步，将bigdata-senior01上的时间修改为和bigdata-senior03上的一致。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 查看是否自动同步时间</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 data]$ date "+%Y-%m-%d %H:%M:%S" 
             2016- 09- 23 16: 54: 36 
            
         
            
             1
             2
    
    可以看到bigdata-senior01上的时间已经实现自动同步了。
    
    #### 第十步、Zookeeper分布式机器部署 ####
    
    三十六、zookeeper说明
    
    Zookeeper在Hadoop集群中的作用。
    
    Zookeeper是分布式管理协作框架，Zookeeper集群用来保证Hadoop集群的高可用，（高可用的含义是：集群中就算有一部分服务器宕机，也能保证正常地对外提供服务。）
    
    Zookeeper保证高可用的原理。
    
    Zookeeper集群能够保证NamaNode服务高可用的原理是：Hadoop集群中有两个NameNode服务，两个NaameNode都定时地给Zookeeper发送心跳，告诉Zookeeper我还活着，可以提供服务，单某一个时间只有一个是Action状态，另外一个是Standby状态，一旦Zookeeper检测不到Action NameNode发送来的心跳后，就切换到Standby状态的NameNode上，将它设置为Action状态，所以集群中总有一个可用的NameNode，达到了NameNode的高可用目的。
    
    Zookeeper的选举机制。
    
    Zookeeper集群也能保证自身的高可用，保证自身高可用的原理是，Zookeeper集群中的各个机器分为Leader和Follower两个角色，写入数据时，要先写入Leader，Leader同意写入后，再通知Follower写入。客户端读取数时，因为数据都是一样的，可以从任意一台机器上读取数据。
    
    这里Leader角色就存在单点故障的隐患，高可用就是解决单点故障隐患的。Zookeeper从机制上解决了Leader的单点故障问题，Leader是哪一台机器是不固定的，Leader是选举出来的。选举流程是，集群中任何一台机器发现集群中没有Leader时，就推荐自己为Leader，其他机器来同意，当超过一半数的机器同意它为Leader时，选举结束，所以Zookeeper集群中的机器数据必须是奇数。这样就算当Leader机器宕机后，会很快选举出新的Leader，保证了Zookeeper集群本身的高可用。
    
    写入高可用。
    
    集群中的写入操作都是先通知Leader，Leader再通知Follower写入，实际上当超过一半的机器写入成功后，就认为写入成功了，所以就算有些机器宕机，写入也是成功的。
    
    读取高可用。
    
    zookeeperk客户端读取数据时，可以读取集群中的任何一个机器。所以部分机器的宕机并不影响读取。
    
    zookeeper服务器必须是奇数台，因为zookeeper有选举制度，角色有：领导者、跟随者、观察者，选举的目的是保证集群中数据的一致性。
    
    三十七、安装zookeeper
    
    我们这里在BigData01、BigData02、BigData03三台机器上安装zookeeper集群。
    
    1、 解压安装包
    
    在BigData01上安装解压zookeeper安装包。
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ tar -zxf /opt/sofeware/zookeeper-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3.4</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.8</span>.tar.gz -C /opt/modules/</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 修改配置</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">拷贝conf下的zoo_sample.cfg副本，改名为zoo.cfg。zoo.cfg是zookeeper的配置文件：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 zookeeper-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3.4</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.8</span>]$ cp conf/zoo_sample.cfg conf/zoo.cfg
         
            
             1
    
    dataDir属性设置zookeeper的数据文件存放的目录：
    
    dataDir=/opt/modules/zookeeper-3.4.8/data/zData
    
    指定zookeeper集群中各个机器的信息：
    
        server .1=bigdata-senior01.chybinmy.com: 2888: 3888 
             server .2=bigdata-senior02.chybinmy.com: 2888: 3888 
             server .3=bigdata-senior03.chybinmy.com: 2888: 3888 
            
         
            
             1
             2
             3
    
    server后面的数字范围是1到255，所以一个zookeeper集群最多可以有255个机器。
    
    ![enter image description here][enter image description here 21]
    
    3、 创建myid文件
    
    在dataDir所指定的目录下创一个名为myid的文件，文件内容为server点后面的数字。
    
    ![enter image description here][enter image description here 22]
    
    4、 分发到其他机器
    
        [hadoop @bigdata-senior01 zookeeper- 3.4 .8]$ scp -r /opt/modules/zookeeper-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3.4</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.8</span> bigdata-senior02.chybinmy.com:/opt/modules</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 zookeeper-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3.4</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.8</span>]$ scp -r /opt/modules/zookeeper- 3.4 .8 bigdata-senior03.chybinmy.com:/opt/modules 
            
         
            
             1
             2
    
    5、 修改其他机器上的myid文件
    
        [hadoop @bigdata-senior02 zookeeper- 3.4. 8] $ </span>echo <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">2</span> > <span class="hljs-regexp" style="color: rgb(0, 136, 0); box-sizing: border-box;">/opt/modules</span><span class="hljs-regexp" style="color: rgb(0, 136, 0); box-sizing: border-box;">/zookeeper-3.4.8/data</span><span class="hljs-regexp" style="color: rgb(0, 136, 0); box-sizing: border-box;">/zData/myid</span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">@bigdata</span>-senior02 zookeeper-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">3.4</span>.<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">8</span>]<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">$ cat /opt/modules/zookeeper- 3.4. 8/data/zData/myid 
             2 
            
         
            
             1
             2
             3
    
        [hadoop @bigdata-senior03 ~] $ </span>echo <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">3</span> > <span class="hljs-regexp" style="color: rgb(0, 136, 0); box-sizing: border-box;">/opt/modules</span><span class="hljs-regexp" style="color: rgb(0, 136, 0); box-sizing: border-box;">/zookeeper-3.4.8/data</span><span class="hljs-regexp" style="color: rgb(0, 136, 0); box-sizing: border-box;">/zData/myid</span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">@bigdata</span>-senior03 ~]<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">$ cat /opt/modules/zookeeper- 3.4. 8/data/zData/myid 
             3 
            
         
            
             1
             2
             3
    
    6、 启动zookeeper
    
    需要在各个机器上分别启动zookeeper。
    
        [hadoop @bigdata-senior01 zookeeper- 3.4. 8] $ </span>bin/zkServer.sh start</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">@bigdata</span>-senior02 zookeeper-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">3.4</span>.<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">8</span>]<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">$ bin/zkServer.sh start 
             [hadoop @bigdata-senior03 zookeeper- 3.4. 8] $ </span>bin/zkServer.sh start</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/e6e83a10-5cbe-11e7-86d9-f17e4b747fa0" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">三十八、zookeeper命令</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">进入zookeeper Shell</span></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">在zookeeper根目录下执行 bin/zkCli.sh进入zk shell模式。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">zookeeper很像一个小型的文件系统，/是根目录，下面的所有节点都叫zNode。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">进入zk shell 后输入任意字符，可以列出所有的zookeeper命令</span></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/f0fc55e0-5cbe-11e7-b8ee-cfb7eda16afc" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">查询zNode上的数据：get /zookeeper</span></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">创建一个zNode : create /znode1 “demodata “</span></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">列出所有子zNode：ls /</span></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/f9ff01b0-5cbe-11e7-8185-21ba04c77532" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">删除znode : rmr /znode1</span></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">退出shell模式：quit</span></p><h4 id="第十一步hadoop-2x-hdfs-ha-部署" style="margin: 0.8em 0px; padding: 0px; box-sizing: border-box; font-family: "microsoft yahei"; font-weight: 300; line-height: 1.1; color: rgb(63, 63, 63); font-size: 1.25em;"><a target="_blank" name="t21" style="color: rgb(79, 161, 219); box-sizing: border-box;"></a>第十一步、Hadoop 2.x HDFS HA 部署</h4><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">三十九、HDFS HA原理</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">单NameNode的缺陷存在单点故障的问题，如果NameNode不可用，则会导致整个HDFS文件系统不可用。所以需要设计高可用的HDFS（Hadoop HA）来解决NameNode单点故障的问题。解决的方法是在HDFS集群中设置多个NameNode节点。但是一旦引入多个NameNode，就有一些问题需要解决。</p><ul style="box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">HDFS HA需要保证的四个问题：</p><ul style="box-sizing: border-box;"><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">保证NameNode内存中元数据数据一致，并保证编辑日志文件的安全性。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">多个NameNode如何协作</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">客户端如何能正确地访问到可用的那个NameNode。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">怎么保证任意时刻只能有一个NameNode处于对外服务状态。</p></li></ul></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">解决方法</p><ul style="box-sizing: border-box;"><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">对于保证NameNode元数据的一致性和编辑日志的安全性，采用Zookeeper来存储编辑日志文件。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">两个NameNode一个是Active状态的，一个是Standby状态的，一个时间点只能有一个Active状态的 <br style="box-sizing: border-box;">NameNode提供服务,两个NameNode上存储的元数据是实时同步的，当Active的NameNode出现问题时，通过Zookeeper实时切换到Standby的NameNode上，并将Standby改为Active状态。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">客户端通过连接一个Zookeeper的代理来确定当时哪个NameNode处于服务状态。</p></li></ul></li></ul><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">四十、HDFS HA架构图</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/0446fec0-5cbf-11e7-86d9-f17e4b747fa0" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><ul style="box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">HDFS HA架构中有两台NameNode节点，一台是处于活动状态（Active）为客户端提供服务，另外一台处于热备份状态（Standby）。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">元数据文件有两个文件：fsimage和edits，备份元数据就是备份这两个文件。JournalNode用来实时从Active NameNode上拷贝edits文件，JournalNode有三台也是为了实现高可用。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">Standby NameNode不对外提供元数据的访问，它从Active NameNode上拷贝fsimage文件，从JournalNode上拷贝edits文件，然后负责合并fsimage和edits文件，相当于SecondaryNameNode的作用。最终目的是保证Standby NameNode上的元数据信息和Active NameNode上的元数据信息一致，以实现热备份。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">Zookeeper来保证在Active NameNode失效时及时将Standby NameNode修改为Active状态。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">ZKFC（失效检测控制）是Hadoop里的一个Zookeeper客户端，在每一个NameNode节点上都启动一个ZKFC进程，来监控NameNode的状态，并把NameNode的状态信息汇报给Zookeeper集群，其实就是在Zookeeper上创建了一个Znode节点，节点里保存了NameNode状态信息。当NameNode失效后，ZKFC检测到报告给Zookeeper，Zookeeper把对应的Znode删除掉，Standby ZKFC发现没有Active状态的NameNode时，就会用shell命令将自己监控的NameNode改为Active状态，并修改Znode上的数据。 <br style="box-sizing: border-box;">Znode是个临时的节点，临时节点特征是客户端的连接断了后就会把znode删除，所以当ZKFC失效时，也会导致切换NameNode。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">DataNode会将心跳信息和Block汇报信息同时发给两台NameNode，DataNode只接受Active NameNode发来的文件读写操作指令。</p></li></ul><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">四十一、搭建HDFS HA 环境</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 服务器角色规划</p><table style="box-sizing: border-box; width: 945.778px; border-collapse: collapse; border-spacing: 0px; border: 1px solid rgb(238, 238, 238); color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><thead style="box-sizing: border-box;"><tr style="box-sizing: border-box;"><th style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);"><span style="box-sizing: border-box;">bigdata-senior01.chybinmy.com</span></th><th style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);"><span style="box-sizing: border-box;">bigdata-senior01.chybinmy.com</span></th><th style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);"><span style="box-sizing: border-box;">bigdata-senior01.chybinmy.com</span></th></tr></thead><tbody style="box-sizing: border-box;"><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">NameNode</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">NameNode</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);"> </td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">Zookeeper</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">Zookeeper</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">Zookeeper</td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">DataNode</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">DataNode</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">DataNode</td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);"> </td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">ResourceManage</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">ResourceManage</td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">NodeManager</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">NodeManager</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">NodeManager</td></tr></tbody></table><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 创建HDFS HA 版本Hadoop程序目录</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">在bigdata01、bigdata02、bigdata03三台机器上分别创建目录/opt/modules/hadoopha/用来存放Hadoop HA环境。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 modules]$ mkdir /opt/modules/hadoopha 1
    
    3、 新解压Hadoop 2.5.0
    
        [hadoop@bigdata-senior01 ~]$ tar -zxf /opt/sofeware/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>.tar.gz -C /opt/modules/hadoopha/</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">4、 配置Hadoop JDK路径</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">修改hadoop-env.sh、mapred-env.sh、yarn-env.sh文件中的JDK路径</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">export JAVA_HOME=<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;"><span class="hljs-string">"/opt/modules/jdk1.7.0_67"</span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">5、 配置hdfs-site.xml</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln" style="width:1040px"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-pi" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="php"><span class="hljs-meta"><?</span>xml version=<span class="hljs-string">"1.0"</span> encoding=<span class="hljs-string">"UTF-8"</span><span class="hljs-meta">?></span></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">configuration</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>dfs.nameservices<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>ns1<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="9"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="10"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>dfs.ha.namenodes.ns1<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="11"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>nn1,nn2<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="12"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="13"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="14"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="15"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>dfs.namenode.rpc-address.ns1.nn1<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="16"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>bigdata-senior01.chybinmy.com:8020<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="17"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="18"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; 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color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="51"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>sshfence<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="52"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="53"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="54"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>dfs.ha.fencing.ssh.private-key-files<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="55"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>/home/hadoop/.ssh/id_rsa<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="56"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="57"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">configuration</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">7</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">8</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">9</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">10</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">11</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">12</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">13</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">14</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">15</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">16</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">17</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">18</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">19</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">20</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">21</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">22</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">23</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">24</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">25</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">26</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">27</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">28</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">29</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">30</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">31</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">32</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">33</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">34</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">35</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">36</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">37</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">38</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">39</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">40</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">41</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">42</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">43</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">44</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">45</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">46</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">47</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">48</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">49</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">50</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">51</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">52</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">53</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">54</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">55</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">56</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">57</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">58</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">6、 配置core-site.xml</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-pi" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="php"><span class="hljs-meta"><?</span>xml version=<span class="hljs-string">"1.0"</span> encoding=<span class="hljs-string">"UTF-8"</span><span class="hljs-meta">?></span></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">configuration</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>fs.defaultFS<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>hdfs://ns1<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="9"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="10"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>hadoop.tmp.dir<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="11"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>/opt/modules/hadoopha/hadoop-2.5.0/data/tmp<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="12"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="13"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">configuration</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">7</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">8</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">9</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">10</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">11</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">12</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">13</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">14</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><code style="box-sizing: border-box; font-family: "Source Code Pro", monospace; padding: 2px 4px; font-size: 13.5px; background-color: rgba(128, 128, 128, 0.075); white-space: nowrap; border-radius: 0px;">hadoop.tmp.dir</code>设置hadoop临时目录地址，默认时，NameNode和DataNode的数据存在这个路径下。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">7、 配置slaves文件</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">bigdata-senior01.chybinmy.com</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">bigdata-senior02.chybinmy.com</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">bigdata-senior03.chybinmy.com</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">8、 分发到其他节点</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">分发之前先将share/doc目录删除，这个目录中是帮助文件，并且很大，可以删除。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln" style="width:851px"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ scp -r /opt/modules/hadoopha bigdata-senior02.chybinmy.com:/opt/modules
            
             [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ scp -r /opt/modules/hadoopha bigdata-senior03.chybinmy.com:/opt/modules</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">9、 启动HDFS HA集群</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">三台机器分别启动Journalnode。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/hadoop-daemon.sh start journalnode 
             [hadoop @bigdata-senior02 hadoop- 2.5 .0]$ sbin/hadoop-daemon.sh start journalnode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior03 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/hadoop-daemon.sh start journalnode 
             1 2 3
    
    jps命令查看是否启动。
    
    10、 启动Zookeeper
    
    在三台节点上启动Zookeeper：
    
        [hadoop @bigdata-senior01 zookeeper- 3.4 .8]$ bin/zkServer.sh start</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior02 zookeeper-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3.4</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.8</span>]$ bin/zkServer.sh start 
             [hadoop @bigdata-senior03 zookeeper- 3.4 .8]$ bin/zkServer.sh start</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">11、 格式化NameNode</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">在第一台上进行NameNode格式化：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ bin/hdfs namenode -format 1
    
    在第二台NameNode上：
    
        [hadoop@bigdata-senior02 hadoop-2.5.0]$ bin/hdfs namenode -bootstrapStandby</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">12、 启动NameNode</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">在第一台、第二台上启动NameNode：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/hadoop-daemon.sh start namenode
            
             [hadoop @bigdata-senior02 hadoop- 2.5 .0]$ sbin/hadoop-daemon.sh start namenode</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">查看HDFS Web页面，此时两个NameNode都是standby状态。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">切换第一台为active状态：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ bin/hdfs haadmin -transitionToActive nn1 1
    
    可以添加上forcemanual参数，强制将一个NameNode转换为Active状态。
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ bin/hdfs haadmin –transitionToActive -forcemanual nn1</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">此时从web 页面就看到第一台已经是active状态了。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/14fd6830-5cbf-11e7-b8ee-cfb7eda16afc" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">13、 配置故障自动转移</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">利用zookeeper集群实现故障自动转移，在配置故障自动转移之前，要先关闭集群，不能在HDFS运行期间进行配置。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">关闭NameNode、DataNode、JournalNode、zookeeper</span></p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/hadoop-daemon.sh stop namenode
            
             [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ sbin/hadoop-daemon.sh stop datanode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/hadoop-daemon.sh stop journalnode 
             [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ cd ../../zookeeper-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3.4</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.8</span>/</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 zookeeper-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3.4</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.8</span>]$ bin/zkServer.sh stop 
             [hadoop @bigdata-senior02 hadoop- 2.5 .0]$ sbin/hadoop-daemon.sh stop namenode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior02 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/hadoop-daemon.sh stop datanode 
             [hadoop @bigdata- senior02 hadoop- 2.5 .0]$ sbin/hadoop-daemon.sh stop journalnode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="9"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>- senior02 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ cd ../../zookeeper- 3.4 .8/ 
             [hadoop @bigdata- senior02 zookeeper- 3.4 .8]$ bin/zkServer.sh stop</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="11"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>- senior03 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/hadoop-daemon.sh stop datanode 
             [hadoop @bigdata- senior03 hadoop- 2.5 .0]$ sbin/hadoop-daemon.sh stop journalnode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="13"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>- senior03 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ cd ../../zookeeper- 3.4 .8/ 
             [hadoop @bigdata- senior03 zookeeper- 3.4 .8]$ bin/zkServer.sh stop</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">7</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">8</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">9</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">10</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">11</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">12</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">13</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">14</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">修改hdfs-site.xml</span></p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>dfs.ha.automatic-failover.enabled<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>true<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">修改core-site.xml</span></p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln" style="width:928px"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>ha.zookeeper.quorum<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"> <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>bigdata-senior01.chybinmy.com:2181,bigdata-senior02.chybinmy.com:2181,bigdata-senior03.chybinmy.com:2181<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">将hdfs-site.xml和core-site.xml分发到其他机器</span></p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln" style="width:1334px"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ scp /opt/modules/hadoopha/hadoop- 2.5 .0/etc/hadoop/hdfs-site.xml bigdata-senior02.chybinmy.com:/opt/modules/hadoopha/hadoop- 2.5 .0/etc/hadoop/ 
             [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ scp /opt/modules/hadoopha/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>/etc/hadoop/hdfs-site.xml bigdata-senior03.chybinmy.com:/opt/modules/hadoopha/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>/etc/hadoop/</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ scp /opt/modules/hadoopha/hadoop- 2.5 .0/etc/hadoop/core-site.xml bigdata-senior02.chybinmy.com:/opt/modules/hadoopha/hadoop- 2.5 .0/etc/hadoop/ 
             [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ scp /opt/modules/hadoopha/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>/etc/hadoop/core-site.xml bigdata-senior03.chybinmy.com:/opt/modules/hadoopha/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>/etc/hadoop/</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">启动zookeeper</span></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">三台机器启动zookeeper</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ /opt/modules/zookeeper- 3.4 .8/bin/zkServer.sh start 1
    
    创建一个zNode
    
        [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ cd /opt/modules/hadoopha/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>/</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ bin/hdfs zkfc -formatZK 
            
         
            
             1
             2
    
    ![enter image description here][enter image description here 23]
    
    在Zookeeper上创建一个存储namenode相关的节点。
    
    14、 启动HDFS、JournalNode、zkfc
    
    启动NameNode、DataNode、JournalNode、zkfc
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ sbin/start-dfs.sh</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">zkfc只针对NameNode监听。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">四十二、测试HDFS HA</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 测试故障自动转移和数据是否共享</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">在nn1上上传文件</span></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">目前bigdata-senior01节点上的NameNode是Active状态的。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/31cc7000-5cbf-11e7-8ca5-edc6aa6f5290" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ bin/hdfs dfs -put /opt/data/wc.input /
         
            
             1
    
    ![enter image description here][enter image description here 24]
    
    将nn1上的NodeNode进程杀掉
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ kill -<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">9</span></span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">3364</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">nn1上的namenode已经无法访问了。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">查看nn2是否是Active状态</span></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/485a8410-5cbf-11e7-86d9-f17e4b747fa0" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><span style="box-sizing: border-box;">在nn2上查看是否看见文件</span></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/50a355c0-5cbf-11e7-8185-21ba04c77532" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">经以上验证，已经实现了nn1和nn2之间的文件同步和故障自动转移。</p><h4 id="第十二步hadoop-2x-yarn-ha-部署" style="margin: 0.8em 0px; padding: 0px; box-sizing: border-box; font-family: "microsoft yahei"; font-weight: 300; line-height: 1.1; color: rgb(63, 63, 63); font-size: 1.25em;"><a target="_blank" name="t22" style="color: rgb(79, 161, 219); box-sizing: border-box;"></a>第十二步、Hadoop 2.x YARN HA 部署</h4><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">四十三、YARN HA原理</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">Hadoop2.4版本之前，ResourceManager也存在单点故障的问题，也需要实现HA来保证ResourceManger的高可也用性。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">ResouceManager从记录着当前集群的资源分配情况和JOB的运行状态，YRAN HA 利用Zookeeper等共享存储介质来存储这些信息来达到高可用。另外利用Zookeeper来实现ResourceManager自动故障转移。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><img src="http://images.gitbook.cn/6676a550-5cbf-11e7-8185-21ba04c77532" alt="enter image description here" title="" style="border: none; box-sizing: border-box; max-width: 100%;"></p><ul style="box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">MasterHADaemon：控制RM的 Master的启动和停止，和RM运行在一个进程中，可以接收外部RPC命令。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">共享存储：Active Master将信息写入共享存储，Standby Master读取共享存储信息以保持和Active Master同步。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">ZKFailoverController：基于Zookeeper实现的切换控制器，由ActiveStandbyElector和HealthMonitor组成，ActiveStandbyElector负责与Zookeeper交互，判断所管理的Master是进入Active还是Standby；HealthMonitor负责监控Master的活动健康情况，是个监视器。</p></li><li style="box-sizing: border-box;"><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box;">Zookeeper：核心功能是维护一把全局锁控制整个集群上只有一个Active的ResourceManager。</p></li></ul><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">四十四、搭建YARN HA环境</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 服务器角色规划</p><table style="box-sizing: border-box; width: 945.778px; border-collapse: collapse; border-spacing: 0px; border: 1px solid rgb(238, 238, 238); color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;"><thead style="box-sizing: border-box;"><tr style="box-sizing: border-box;"><th style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);"><span style="box-sizing: border-box;">bigdata-senior01.chybinmy.com</span></th><th style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);"><span style="box-sizing: border-box;">bigdata-senior01.chybinmy.com</span></th><th style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);"><span style="box-sizing: border-box;">bigdata-senior01.chybinmy.com</span></th></tr></thead><tbody style="box-sizing: border-box;"><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">NameNode</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">NameNode</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);"> </td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">Zookeeper</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">Zookeeper</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">Zookeeper</td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">DataNode</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">DataNode</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">DataNode</td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);"> </td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">ResourceManage</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">ResourceManage</td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">NodeManager</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">NodeManager</td><td style="box-sizing: border-box; padding: 8px; line-height: 20px; vertical-align: top; border: 1px solid rgb(238, 238, 238);">NodeManager</td></tr></tbody></table><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">2、 修改配置文件yarn-site.xml</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-xml hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln" style="width:935px"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-pi" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="php"><span class="hljs-meta"><?</span>xml version=<span class="hljs-string">"1.0"</span> encoding=<span class="hljs-string">"UTF-8"</span><span class="hljs-meta">?></span></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">configuration</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.nodemanager.aux-services<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>mapreduce_shuffle<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.log-aggregation-enable<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="9"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>true<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="10"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="11"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="12"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.log-aggregation.retain-seconds<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="13"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>106800<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="14"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="15"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="16"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="17"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.resourcemanager.ha.enabled<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="18"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>true<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="19"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="20"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="21"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="22"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.resourcemanager.cluster-id<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="23"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>yarn-cluster<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="24"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="25"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="26"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="27"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.resourcemanager.ha.rm-ids<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="28"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>rm12,rm13<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="29"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="30"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="31"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="32"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.resourcemanager.hostname.rm12<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="33"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>bigdata-senior02.chybinmy.com<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="34"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="35"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="36"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="37"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.resourcemanager.hostname.rm13<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="38"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>bigdata-senior03.chybinmy.com<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="39"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="40"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="41"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="42"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.resourcemanager.zk-address<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="43"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>bigdata-senior01.chybinmy.com:2181,bigdata-senior02.chybinmy.com:2181,bigdata-senior03.chybinmy.com:2181<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="44"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="45"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="46"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="47"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.resourcemanager.recovery.enabled<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="48"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>true<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="49"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="50"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="51"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"><span class="hljs-comment"></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="52"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span>yarn.resourcemanager.store.class<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">name</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="53"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"><</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span>org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore<span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">value</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="54"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">  <span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">property</span></span></span><span class="hljs-tag">></span></span></div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="55"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-tag" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-tag"></</span><span class="hljs-title" style="box-sizing: border-box; color: rgb(0, 0, 136);"><span class="hljs-tag"><span class="hljs-name">configuration</span></span></span><span class="hljs-tag">></span></span></div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">4</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">5</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">6</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">7</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">8</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">9</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">10</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">11</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">12</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">13</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">14</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">15</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">16</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">17</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">18</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">19</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">20</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">21</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">22</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">23</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">24</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">25</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">26</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">27</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">28</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">29</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">30</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">31</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">32</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">33</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">34</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">35</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">36</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">37</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">38</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">39</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">40</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">41</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">42</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">43</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">44</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">45</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">46</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">47</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">48</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">49</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">50</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">51</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">52</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">53</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">54</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">55</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">56</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 分发到其他机器</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln" style="width:1341px"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ scp /opt/modules/hadoopha/hadoop-2.5.0/etc/hadoop/yarn-site.xml bigdata-senior02.chybinmy.com:/opt/modules/hadoopha/hadoop-2.5.0/etc/hadoop/
            
             [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ scp /opt/modules/hadoopha/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>/etc/hadoop/yarn-site.xml bigdata-senior03.chybinmy.com:/opt/modules/hadoopha/hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>/etc/hadoop/\</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">4、 启动</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">在bigdata-senior01上启动yarn：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" οnclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/start-yarn.sh 1
    
    在bigdata-senior02、bigdata-senior03上启动resourcemanager：
    
        [hadoop @bigdata-senior02 hadoop- 2.5 .0]$ sbin/yarn-daemon.sh start resourcemanager</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior03 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/yarn-daemon.sh start resourcemanager 
            
         
            
             1
             2
    
    启动后各个节点的进程。
    
    ![enter image description here][enter image description here 25]
    
    ![enter image description here][enter image description here 26]
    
    ![enter image description here][enter image description here 27]
    
    Web客户端访问bigdata02机器上的resourcemanager正常，它是active状态的。
    
    [http://bigdata-senior02.chybinmy.com:8088/cluster][http_bigdata-senior02.chybinmy.com_8088_cluster]
    
    访问另外一个resourcemanager，因为他是standby,会自动跳转到active的resourcemanager。
    
    [http://bigdata-senior03.chybinmy.com:8088/cluster][http_bigdata-senior03.chybinmy.com_8088_cluster]
    
    四十五、测试YARN HA
    
    5、 运行一个mapreduce job
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ bin/yarn jar share/hadoop/mapreduce/hadoop-mapreduce-examples-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>.jar wordcount /wc.input /input</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">6、 在job运行过程中，将Active状态的resourcemanager进程杀掉。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior02 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ kill -9 4475
         
            
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    7、 观察另外一个resourcemanager是否可以自动接替。
    
    bigdata02的resourcemanage Web客户端已经不能访问，bigdata03的resourcemanage已经自动变为active状态。
    
    8、 观察job是否可以顺利完成。
    
    而mapreduce job 也能顺利完成，没有因为resourcemanager的意外故障而影响运行。
    
    经过以上测试，已经验证YARN HA 已经搭建成功。
    
    #### 第十三步、HDFS Federation 架构部署 ####
    
    四十六、HDFS Federation 的使用原因
    
    1、 单个NameNode节点的局限性
    
    命名空间的限制。
    
    NameNode上存储着整个HDFS上的文件的元数据，NameNode是部署在一台机器上的，因为单个机器硬件的限制，必然会限制NameNode所能管理的文件个数，制约了数据量的增长。
    
    数据隔离问题。
    
    整个HDFS上的文件都由一个NameNode管理，所以一个程序很有可能会影响到整个HDFS上的程序，并且权限控制比较复杂。
    
    性能瓶颈。
    
    单个NameNode时HDFS文件系统的吞吐量受限于单个NameNode的吞吐量。因为NameNode是个JVM进程，JVM进程所占用的内存很大时，性能会下降很多。
    
    2、 HDFS Federation介绍
    
    HDFS Federation是可以在Hadoop集群中设置多个NameNode，不同于HA中多个NameNode是完全一样的，是多个备份，Federation中的多个NameNode是不同的，可以理解为将一个NameNode切分为了多个NameNode，每一个NameNode只负责管理一部分数据。   
    HDFS Federation中的多个NameNode共用DataNode。
    
    四十七、HDFS Federation的架构图
    
    ![enter image description here][enter image description here 28]
    
    四十八、HDFS Federation搭建
    
    1、 服务器角色规划
    
    <table> 
     <thead> 
      <tr> 
       <th>bigdata-senior01.chybinmy.com</th> 
       <th>bigdata-senior01.chybinmy.com</th> 
       <th>bigdata-senior01.chybinmy.com</th> 
      </tr> 
     </thead> 
     <tbody> 
      <tr> 
       <td>NameNode1</td> 
       <td>NameNode2</td> 
       <td>NameNode3</td> 
      </tr> 
      <tr> 
       <td>&nbsp;</td> 
       <td>ResourceManage</td> 
       <td>&nbsp;</td> 
      </tr> 
      <tr> 
       <td>DataNode</td> 
       <td>DataNode</td> 
       <td>DataNode</td> 
      </tr> 
      <tr> 
       <td>NodeManager</td> 
       <td>NodeManager</td> 
       <td>NodeManager</td> 
      </tr> 
     </tbody> 
    </table>
    
    2、 创建HDFS Federation 版本Hadoop程序目录
    
    在bigdata01上创建目录/opt/modules/hadoopfederation /用来存放Hadoop Federation环境。
    
        [hadoop@bigdata-senior01 modules]$ mkdir /opt/modules/hadoopfederation</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">3、 新解压Hadoop 2.5.0</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 ~]$ tar -zxf /opt/sofeware/hadoop-2.5.0.tar.gz -C /opt/modules/hadoopfederation/
         
            
             1
    
    4、 配置Hadoop JDK路径
    
    修改hadoop-env.sh、mapred-env.sh、yarn-env.sh文件中的JDK路径。
    
    export JAVA\_HOME=”/opt/modules/jdk1.7.0\_67”
    
    5、 配置hdfs-site.xml
    
        <configuration> 
             <property> 
             <!—配置三台NameNode --> 
             <name>dfs.nameservices </name> 
             <value>ns1,ns2,ns3 </value> 
             </property> 
             <property> 
             <!—第一台NameNode的机器名和rpc端口，指定了NameNode和DataNode通讯用的端口号 --> 
             <name>dfs.namenode.rpc-address.ns1 </name> 
             <value>bigdata-senior01.chybinmy.com:8020 </value> 
             </property> 
             <property> 
             <!—第一台NameNode的机器名和rpc端口，备用端口号 --> 
             <name>dfs.namenode.serviceerpc-address.ns1 </name> 
             <value>bigdata-senior01.chybinmy.com:8022 </value> 
             </property> 
             <property> 
             <!—第一台NameNode的http页面地址和端口号 --> 
             <name>dfs.namenode.http-address.ns1 </name> 
             <value>bigdata-senior01.chybinmy.com:50070 </value> 
             </property> 
             <property> 
             <!—第一台NameNode的https页面地址和端口号 --> 
             <name>dfs.namenode.https-address.ns1 </name> 
             <value>bigdata-senior01.chybinmy.com:50470 </value> 
             </property> 
             
             <property> 
             <name>dfs.namenode.rpc-address.ns2 </name> 
             <value>bigdata-senior02.chybinmy.com:8020 </value> 
             </property> 
             <property> 
             <name>dfs.namenode.serviceerpc-address.ns2 </name> 
             <value>bigdata-senior02.chybinmy.com:8022 </value> 
             </property> 
             <property> 
             <name>dfs.namenode.http-address.ns2 </name> 
             <value>bigdata-senior02.chybinmy.com:50070 </value> 
             </property> 
             <property> 
             <name>dfs.namenode.https-address.ns2 </name> 
             <value>bigdata-senior02.chybinmy.com:50470 </value> 
             </property> 
             
             
             <property> 
             <name>dfs.namenode.rpc-address.ns3 </name> 
             <value>bigdata-senior03.chybinmy.com:8020 </value> 
             </property> 
             <property> 
             <name>dfs.namenode.serviceerpc-address.ns3 </name> 
             <value>bigdata-senior03.chybinmy.com:8022 </value> 
             </property> 
             <property> 
             <name>dfs.namenode.http-address.ns3 </name> 
             <value>bigdata-senior03.chybinmy.com:50070 </value> 
             </property> 
             <property> 
             <name>dfs.namenode.https-address.ns3 </name> 
             <value>bigdata-senior03.chybinmy.com:50470 </value> 
             </property> 
             
             </configuration> 
            
         
            
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    6、 配置core-site.xml
    
        <configuration> 
             <property> 
             <name>hadoop.tmp.dir </name> 
             <value>/opt/modules/hadoopha/hadoop-2.5.0/data/tmp </value> 
             </property> 
             </configuration> 
            
         
            
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    hadoop.tmp.dir设置hadoop临时目录地址，默认时，NameNode和DataNode的数据存在这个路径下。
    
    7、 配置slaves文件
    
        bigdata-senior01.chybinmy.com 
             bigdata-senior02.chybinmy.com 
             bigdata-senior03.chybinmy.com 
            
         
            
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    8、 配置yarn-site.xml
    
        <configuration> 
             <property> 
             <name>yarn.nodemanager.aux-services </name> 
             <value>mapreduce_shuffle </value> 
             </property> 
             <property> 
             <name>yarn.resourcemanager.hostname </name> 
             <value>bigdata-senior02.chybinmy.com </value> 
             </property> 
             <property> 
             <name>yarn.log-aggregation-enable </name> 
             <value>true </value> 
             </property> 
             <property> 
             <name>yarn.log-aggregation.retain-seconds </name> 
             <value>106800 </value> 
             </property> 
             </configuration> 
            
         
            
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    9、 分发到其他节点
    
    分发之前先将share/doc目录删除，这个目录中是帮助文件，并且很大，可以删除。
    
        [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ scp -r /opt/modules/ /opt/modules/hadoopfederation bigdata-senior02.chybinmy.com:/opt/modules</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ scp -r /opt/modules/hadoopfederation bigdata-senior03.chybinmy.com:/opt/modules 
            
         
            
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    10、 格式化NameNode
    
    在第一台上进行NameNode格式化。
    
        [hadoop@bigdata-senior01 hadoop-2.5.0]$ bin/hdfs namenode -format -clusterId hadoop-federation-clusterId</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">这里一定要指定一个集群ID，使得多个NameNode的集群ID是一样的，因为这三个NameNode在同一个集群中，这里集群ID为hadoop-federation-clusterId。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">在第二台NameNode上。</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior02 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ bin/hdfs namenode -format -clusterId hadoop-federation-clusterId
         
            
             1
    
    在第二台NameNode上。
    
        [hadoop@bigdata-senior03 hadoop-2.5.0]$ bin/hdfs namenode -format -clusterId hadoop-federation-clusterId</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">11、 启动NameNode</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">在第一台、第二台、第三台机器上启动NameNode：</p><pre class="prettyprint" name="code" style="white-space: nowrap; word-wrap: break-word; box-sizing: border-box; position: relative; overflow-y: hidden; overflow-x: auto; margin-top: 0px; margin-bottom: 1.1em; font-family: "Source Code Pro", monospace; padding: 5px 5px 5px 60px; font-size: 14px; line-height: 1.45; word-break: break-all; color: rgb(51, 51, 51); background-color: rgba(128, 128, 128, 0.05); border: 0px solid rgb(136, 136, 136); border-radius: 0px;" onclick="hljs.copyCode(event)"><code class="language-java hljs has-numbering" style="display: block; padding: 0px; background: transparent; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal;"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/hadoop-daemon.sh start namenode
            
             [hadoop @bigdata-senior02 hadoop- 2.5 .0]$ sbin/hadoop-daemon.sh start namenode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior03 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/hadoop-daemon.sh start namenode 
             1 2 3
    
    启动后，用jps命令查看是否已经启动成功。
    
    查看HDFS Web页面，此时三个NameNode都是standby状态。
    
    ![enter image description here][enter image description here 29]
    
    ![enter image description here][enter image description here 30]
    
    ![enter image description here][enter image description here 31]
    
    12、 启动DataNode
    
        [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ sbin/hadoop-daemon.sh start datanode</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior02 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ sbin/hadoop-daemon.sh start datanode 
             [hadoop @bigdata-senior03 hadoop- 2.5 .0]$ sbin/hadoop-daemon.sh start datanode</div></div></li></ol></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">1</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">2</li><li style="box-sizing: border-box; padding: 0px 5px; list-style: none; margin-left: 0px;">3</li></ul><div class="hljs-button" data-title="复制"></div></pre><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">启动后，用jps命令确认DataNode进程已经启动成功。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">四十九、测试HDFS Federation</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">1、 修改core-site.xml</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">在bigdata-senior01机器上,修改core-site.xml文件，指定连接的NameNode是第一台NameNode。</p><p style="margin-top: 0px; margin-bottom: 1.1em; padding-top: 0px; padding-bottom: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: "microsoft yahei"; font-size: 15px;">[hadoop@bigdata-senior01 hadoop-2.5.0]$ vim etc/hadoop/core-site.xml 
              
                 
                  <configuration> 
                  <property> 
                  <name>fs.defaultFS </name> 
                  <value>hdfs://bigdata-senior01.chybinmy.com:8020 </value> 
                  </property> 
                  <property> 
                  <name>hadoop.tmp.dir </name> 
                  <value>/opt/modules/hadoopfederation/hadoop-2.5.0/data/tmp </value> 
                  </property> 
                  </configuration> 
                 
              
                 
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                 2、 在bigdate-senior01上传一个文件到HDFS 
              
                 
                  [hadoop @bigdata-senior01 hadoop- 2.5 .0]$ bin/hdfs dfs -mkdir /tmp</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">[hadoop<span class="hljs-annotation" style="color: rgb(155, 133, 157); box-sizing: border-box;"><span class="hljs-meta">@bigdata</span></span>-senior01 hadoop-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;"><span class="hljs-number">2.5</span></span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]$ bin/hdfs dfs -put ~/shuffle_daily.sh /tmp/shuffle_daily.sh 
                 
              
                 
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                 3、 查看HDFS文件 可以看到，刚才的文件只上传到了bigdate-senior01机器上的NameNode上了，并没有上传到其他的NameNode上去。 这样，在HDFS的客户端，可以指定要上传到哪个NameNode上，从而来达到了划分NameNode的目的。 后记 这篇文章的操作步骤并不是工作中标准的操作流程，如果在成百上千的机器全部这样安装会被累死，希望读者可以通过文章中一步步地安装，从而初步了解到Hadoop的组成部分，协助过程等，这对于Hadoop的深入使用有很大的帮助。

[Hadoop]: http://gitbook.cn/books/5954c9600326c7705af8a92a/index.html
[http_blog.csdn.net_collection4u_article_details_14127671]: http://blog.csdn.net/collection4u/article/details/14127671
[enter image description here]: /images/20220520/5d4dee70b96b4f81b94daf051cd6e854.png
[enter image description here 1]: /images/20220520/44ccab7723164b9f9db6b3d2a72a6de1.png
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[enter image description here 17]: /images/20220520/a7178996e8f5413fb83a78c1368398ed.png
[http_192.168.100.10_8088]: http://192.168.100.10:8088/
[enter image description here 18]: /images/20220520/d9e8bdc3a4944d1eb3f72d73131f327a.png
[enter image description here 19]: /images/20220520/47de0cc1608047c0ac33da67b3dc14cf.png
[enter image description here 20]: /images/20220520/ab867903c7924b07afc21ff892fde978.png
[http_bigdata-senior01.chybinmy.com_19888]: http://bigdata-senior01.chybinmy.com:19888/
[enter image description here 21]: /images/20220520/5d65bfa2183f4512910088fb8abada2f.png
[enter image description here 22]: /images/20220520/7257000728c648e9929efc199db4fe3d.png
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[enter image description here 27]: /images/20220520/8deddf94905945c7baf8fdbe13b13fce.png
[http_bigdata-senior02.chybinmy.com_8088_cluster]: http://bigdata-senior02.chybinmy.com:8088/cluster
[http_bigdata-senior03.chybinmy.com_8088_cluster]: http://bigdata-senior03.chybinmy.com:8088/cluster
[enter image description here 28]: /images/20220520/cc8f9afa55cb4dbbace0b87d2bcd4cd3.png
[enter image description here 29]: /images/20220520/0eeaea563f154503b143b02ae8a78404.png
[enter image description here 30]: /images/20220520/06b66b5d27204b308137ede6b087acc5.png
[enter image description here 31]: /images/20220520/51e60d4707114cec8d68c1d8f9c28c44.png