hadoop-1.2.1安装方法详解

Myth丶恋晨 2022-07-31 15:27 163阅读 0赞

一、环境准备  
1、安装VMware软件，然后在VMware里安装三台Linux虚拟机(我使用的是redhat)  
2、设置虚拟机

<table style="word-wrap:break-word; empty-cells:show; border-collapse:collapse; border:1px solid rgb(227,237,245); table-layout:auto; width:377px; color:rgb(68,68,68); font-family:Tahoma,'Microsoft Yahei',Simsun; font-size:14px; line-height:21px"> 
 <tbody style="word-wrap:break-word"> 
  <tr style="word-wrap:break-word"> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      主机名 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      ip 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      内存 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      硬盘 
    </div> </td> 
  </tr> 
  <tr style="word-wrap:break-word"> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      master 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      192.168.10.200 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      500M 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      8G 
    </div> </td> 
  </tr> 
  <tr style="word-wrap:break-word"> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      slave1 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      192.168.10.201 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      500M 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      8G 
    </div> </td> 
  </tr> 
  <tr style="word-wrap:break-word"> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      slave2 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      192.168.10.202 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      500M 
    </div> </td> 
   <td style="word-wrap:break-word; font-size:14px; padding:4px; border:1px solid rgb(227,237,245); overflow:hidden"> 
    <div style="word-wrap:break-word">
      8G 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

3、下载hadoop-1.2.1安装文件hadoop-1.2.1-bin.tar.gz  
  
二、安装  
注：标示“三台主机”的表示要在三台电脑上都做该操作，“master节点”表示只在mdw主机上操作  
1、关闭防火墙(三台主机)(学习时可以直接关闭，正式环境是通过开放端口)  
service iptables stop  停止防火墙服务，重启电脑后仍然会开启  
chkconfig iptables off  关闭防火墙服务开机启动，重启后生效  
可以两个命令结合使用避免重启  
  
2、关闭SELINUX(三台主机)  
修改/etc/selinux/config 中的SELINUX="" 为 disabled   
  
3、修改hosts文件(三台主机)  
在hosts文件中添加或修改一下内容  
192.168.10.200 master  
192.168.10.201 slave1  
192.168.10.202 slave2  
  
由于我以前安装greenplum时已经修改过hosts文件，所以我直接追加相应的解析名：  
192.168.10.200 mdw master  
192.168.10.201 sdw1 slave1  
192.168.10.202 sdw2 slave2  
  
[greendplum安装方法][greendplum] ：http://blog.csdn.net/gnail\_oug/article/details/46945283   
  
添加之后，可以通过ping命令测试是否正确，如：ping slave1 测试是否能访问slave1节点

4、配置java环境(三台主机)  
上传jdk文件并授权之后，执行安装配置  
\[root@mdw temp\]\# . /jdk-6u45-linux-i586-rpm.bin  
  
  
验证jdk安装  
\[root@mdw temp\]\# java -version  
java version "1.6.0\_45"  
Java(TM) SE Runtime Environment (build 1.6.0\_45-b06）  
Java HotSpot(TM) Client VM (build 20.45-b01, mixed mode, sharing)  
  
5、创建hadoop用户，并设置密码(三台主机)  
\[root@mdw temp\]\# useradd hadoop  
\[root@mdw temp\]\# passwd hadoop  
  
  
6、设置无密码登录(三台主机)  
      (1)三台主机上分别使用hadoop用户登录，生成密钥  
\[hadoop@mdw ~\]$ ssh-keygen -t rsa  
Generating public/private rsa key pair.  
Enter file in which to save the key (/home/hadoop/.ssh/id\_rsa): (按Enter键)  
Created directory '/home/hadoop/.ssh'.  
Enter passphrase (empty for no passphrase): (按Enter键)  
Enter same passphrase again: (按Enter键)  
Your identification has been saved in /home/hadoop/.ssh/id\_rsa.  
Your public key has been saved in /home/hadoop/.ssh/id\_rsa.pub.  
The key fingerprint is:  
02:68:05:12:5b:b2:8e:53:e8:d0:0d:85:b8:77:ad:49 hadoop@mdw  
The key's randomart image is:  
\+--\[ RSA 2048\]----+  
|+o++o            |  
|.O.=             |  
|=.= o.           |  
|\*o. E..          |  
|o+ o o. S        |  
| .  o  .         |  
|                 |  
|                 |  
|                 |  
\+-----------------+  
  
  
这样在hadoop用户目录下产生了一个.ssh隐藏文件夹  
  
        (2)配置SSH无密码登录主机  
三台主机分别将公钥id\_rsa.pub的内容追加到authorized\_keys文件，并将authorized\_keys文件发送到其他两台主机  
\[hadoop@mdw ~\]$ cat ~/.ssh/id\_rsa.pub >>~/.ssh/authorized\_keys  
\[hadoop@mdw ~\]$ scp ~/.ssh/authorized\_keys slave1:~/.ssh/  
执行完以上操作后，每台主机的authorized\_keys文件里都包含这三台主机的公钥  
  
       (3)三台主机上分别更改authorized\_keys文件的权限为600  
\[hadoop@mdw .ssh\]$ chmod 600 authorized\_keys   
       (4)验证SSH无密码登录  
\[hadoop@mdw ~\]$ ssh slave1  
\[hadoop@mdw ~\]$ ssh slave2  
在任意一台主机上，都可以无密码登录到另外两台主机  
  
  
7、配置hadoop用的jdk环境变量(master主机)  
在hadoop用户文件夹下的 .bashrc文件中添加以下内容

export JAVA_HOME=/usr/java/jdk1.6.0_45
    export PATH=$PATH:$JAVA_HOME/bin
    export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib

将 .bashrc文件发送到另外两台主机  
\[hadoop@mdw ~\]$  scp .bashrc slave1:~  
\[hadoop@mdw ~\]$  scp .bashrc slave2:~  
  
  
8、上传hadoop安装文件，并解压文件(master主机)  
\[hadoop@mdw temp\]$  cp /mnt/cdrom/hadoop-1.2.1-bin.tar.gz .  
\[hadoop@mdw temp\]$  tar -xzvf hadoop-1.2.1-bin.tar.gz   
如果是使用root用户上传解压的文件，要将文件所属者改为hadoop  
\# chown -R hadoop:hadoop hadoop-1.2.1  
  
9、修改hadoop-env.sh文件，配置hadoop的运行环境(master主机)  
修改/home/hadoop/hadoop-1.2.1/conf/hadoop-env.sh 文件，  
将里面的  
\# export JAVA\_HOME=/usr/lib/j2sdk1.5-sun   
配置去掉注释，并改为   
export JAVA\_HOME=/usr/java/jdk1.6.0\_45  
  
将里面的  
\# export HADOOP\_HEAPSIZE=2000  
去掉注释，并改为  
export HADOOP\_HEAPSIZE=100  
如果你电脑的内存够大，这里可以不用配置，也可以根据你自己的电脑内存情况配置  
  
10、修改core-site.xml文件  
修改/home/hadoop/hadoop-1.2.1/conf/core-site.xml 文件，添加以下配置  
<property>  
        <name>fs.default.name</name>  
        <value>hdfs://master:9000</value>  
</property>  
<property>  
         <name>hadoop.tmp.dir</name>  
         <value>/home/hadoop/tmp</value>  
</property>

11、修改hdfs-site.xml文件

修改/home/hadoop/hadoop-1.2.1/conf/hdfs-site.xml 文件，添加以下配置

<property>  
        <name>dfs.data.dir</name>  
        <value>/data/hadoop</value>  
</property>  
<property>  
        <name>dfs.replication</name>  
        <value>2</value>  
</property>  
  
  
注意：在每个DataNode节点上要创建好指定的目录/data/hadoop，并且将所属用户改为hadoop  
\[root@sdw1 data\]\# chown hadoop:hadoop hadoop/  
  
12、修改mapred-site.xml   
修改/home/hadoop/hadoop-1.2.1/conf/mapred-site.xml 文件，添加以下配置  
<property>  
        <name>mapred.job.tracker</name>  
        <value>master:9001</value>  
</property>  
  
  
13、修改masters和slaves文件   
修改/home/hadoop/hadoop-1.2.1/conf/masters文件，内容改为：  
master  
修改/home/hadoop/hadoop-1.2.1/conf/slaves文件，内容改为：  
slave1  
slave2  
  
  
  
14、把在Master节点上配置好的hadoop目录复制到slave1和slave2节点  
\[hadoop@mdw ~\]$ scp -r hadoop-1.2.1/ slave1:~  
\[hadoop@mdw ~\]$ scp -r hadoop-1.2.1/ slave2:~  
  
15、格式化HDFS分布式文件系统  
\[hadoop@mdw ~\]$  ./hadoop-1.2.1/bin/hadoop namenode -format  
15/05/26 06:58:43 INFO namenode.NameNode: STARTUP\_MSG:   
/\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*  
STARTUP\_MSG: Starting NameNode  
STARTUP\_MSG:   host = mdw/192.168.1.200  
STARTUP\_MSG:   args = \[-format\]  
STARTUP\_MSG:   version = 1.2.1  
STARTUP\_MSG:   build =  [https://svn.apache.org/repos/asf ... branches/branch-1.2][https_svn.apache.org_repos_asf ... branches_branch-1.2]  -r 1503152; compiled by 'mattf' on Mon Jul 22 15:23:09 PDT 2013  
STARTUP\_MSG:   java = 1.6.0\_45  
\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*/  
15/05/26 06:58:43 INFO util.GSet: Computing capacity for map BlocksMap  
15/05/26 06:58:43 INFO util.GSet: VM type       = 32-bit  
15/05/26 06:58:43 INFO util.GSet: 2.0% max memory = 101384192  
15/05/26 06:58:43 INFO util.GSet: capacity      = 2^19 = 524288 entries  
15/05/26 06:58:43 INFO util.GSet: recommended=524288, actual=524288  
15/05/26 06:58:43 INFO namenode.FSNamesystem: fsOwner=hadoop  
15/05/26 06:58:43 INFO namenode.FSNamesystem: supergroup=supergroup  
15/05/26 06:58:43 INFO namenode.FSNamesystem: isPermissionEnabled=true  
15/05/26 06:58:43 INFO namenode.FSNamesystem: dfs.block.invalidate.limit=100  
15/05/26 06:58:43 INFO namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s)  
15/05/26 06:58:43 INFO namenode.FSEditLog: dfs.namenode.edits.toleration.length = 0  
15/05/26 06:58:43 INFO namenode.NameNode: Caching file names occuring more than 10 times   
15/05/26 06:58:43 INFO common.Storage: Image file /home/hadoop/tmp/dfs/name/current/fsimage of size 112 bytes saved in 0 seconds.  
15/05/26 06:58:43 INFO namenode.FSEditLog: closing edit log: position=4, editlog=/home/hadoop/tmp/dfs/name/current/edits  
15/05/26 06:58:43 INFO namenode.FSEditLog: close success: truncate to 4, editlog=/home/hadoop/tmp/dfs/name/current/edits  
15/05/26 06:58:43 INFO common.Storage: Storage directory /home/hadoop/tmp/dfs/name has been successfully formatted.  
15/05/26 06:58:43 INFO namenode.NameNode: SHUTDOWN\_MSG:   
/\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*  
SHUTDOWN\_MSG: Shutting down NameNode at mdw/192.168.1.200  
\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*/  
  
  
16、启动并检测守护进程  
\[hadoop@mdw ~\]$  ./hadoop-1.2.1/bin/start-all.sh   
starting namenode, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-namenode-mdw.out  
slave2: starting datanode, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-datanode-sdw2.out  
slave1: starting datanode, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-datanode-sdw1.out  
master: starting secondarynamenode, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-secondarynamenode-mdw.out  
starting jobtracker, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-jobtracker-mdw.out  
slave2: starting tasktracker, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-tasktracker-sdw2.out  
slave1: starting tasktracker, logging to /home/hadoop/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-tasktracker-sdw1.out  
  
  
master节点：

\[hadoop@mdw ~\]$  jps

16841 Jps

16739 JobTracker

16658 SecondaryNameNode

16488 NameNode

slave节点：  
\[hadoop@sdw1 logs\]$  jps  
31014 Jps  
30835 DataNode  
30929 TaskTracker  
  
  
17、网页查看集群状态  
http://master:50070  
http://master:50030  
如果本地电脑没有配置master解析，将master换成ip  
[http://192.168.1.200:50070][http_192.168.1.200_50070]  
[http://192.168.1.200:50030][http_192.168.1.200_50030]  
  
18、停止hadoop集群  
\[hadoop@mdw ~\]$  ./hadoop-1.2.1/bin/stop-all.sh    
stopping jobtracker  
slave2: stopping tasktracker  
slave1: stopping tasktracker  
stopping namenode  
slave2: stopping datanode  
slave1: stopping datanode  
master: stopping secondarynamenode

[greendplum]: http://blog.csdn.net/gnail_oug/article/details/46945283
[https_svn.apache.org_repos_asf ... branches_branch-1.2]: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.2
[http_192.168.1.200_50070]: http://192.168.1.200:50070/
[http_192.168.1.200_50030]: http://192.168.1.200:50030/