ZooKeeper 3.4.5 分布式环境搭建

矫情吗；* 2021-09-26 04:50 248阅读 0赞

zookeeper是Hadoop的一个子项目，它是一个针对大型分布式系统的可靠协调系统，提供的功能包括：配置维护、名字服务、分布式同步、组服务等。zookeeper的目标是封装好复杂、易出错的关键服务，将简单易用的接口和性能高效、功能稳定的系统提供给用户。他也是Google的Chubby一个开源的实现，是高有效和可靠的协同工作系统，Zookeeper能够用来leader选举，配置信息维护等，在一个分布式的环境中，需要一个Master实例或存储一些配置信息，确保文件写入的一致性等。

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[wyp@master Downloads]$ wget http://mirrors.cnnic.cn/
    apache/zookeeper/zookeeper-3.4.5/zookeeper-3.4.5.tar.gz
    [wyp@master Downloads]$ tar -zxvf zookeeper-3.4.5.tar.gz

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 <td align="left"> 解压的文件夹名为zookeeper-3.4.5，下文将用ZOOKEEPER_HOME作为Zookeeper的安装目录。 2、修改Zookeeper的默认配置文件，如下： </td> 
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 <td align="left"> [wyp@master zookeeper-3.4.5]$ cd conf/ [wyp@master conf]$ ls -l 总用量 12 -rw-r--r--. 1 wyp wyp&nbsp; 535 Oct&nbsp; 1&nbsp; 2012 configuration.xsl -rw-r--r--. 1 wyp wyp 2161 Oct&nbsp; 1&nbsp; 2012 log4j.properties -rw-r--r--. 1 wyp wyp&nbsp; 808 Oct&nbsp; 1&nbsp; 2012 zoo_sample.cfg [wyp@master conf]$ cp zoo_sample.cfg zoo.cfg [wyp@master conf]$ vim zoo.cfg </td> 
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将里面的默认配置修改为如下（当然，具体配置可以根据你机器来定）：

tickTime=2000
    # The number of ticks that the initial
    # synchronization phase can take
    initLimit=10
    # The number of ticks that can pass between
    # sending a request and getting an acknowledgement
    
    syncLimit=5
    # the directory where the snapshot is stored.
    # do not use /tmp for storage, /tmp here is just
    # example sakes.
    dataDir=/home/wyp/zookeeper
    # the port at which the clients will connect
    clientPort=2181

server.1=master:2888:3888
    server.2=node1:2888:3888
    server.3=node2:2888:3888

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 <td align="left"> 3、在刚刚zoo.cfg文件中dataDir属性指定的目录（本文中为/home/wyp/zookeeper）下创建一个 myid，在里面添加你指定的server编号，因为这台机器是master，而zoo.cfg中master编号为1(se rver.1=master:2888:3888)，所以myid内容只需要为1即可。 </td> 
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 <td align="left"> [wyp@master conf]$ mkdir /home/wyp/zookeeper [wyp@master conf]$ vim /home/wyp/zookeeper/myid 1 [wyp@master conf]$ </td> 
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 <td align="left"> 这样就在master机器上配置好Zookeeper，接下来只需要将master配置好的Zookeeper整个目录 打包分发到node1、node2机器中： 4、打包、分发到node1、node2： </td> 
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 <td align="left"> [wyp@master Downloads]$ tar -zcvf zookeeper.tar.gz zookeeper-3.4.5 [wyp@master Downloads]$ scp zookeeper.tar.gz node1:/home/wyp/Downloads </td> 
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\[wyp@master Downloads\]$scp zookeeper.tar.gz node2:/home/wyp/Downloads

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 <td align="left"> 5、分别登陆node1、node2，并将刚刚发送的zookeeper.tar.gz文件解压： </td> 
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 <td align="left"> [wyp@master Downloads]$&nbsp; ssh node1 Last login: Sat Jan 18 16:46:50 2014 from master [wyp@node1 ~]$ cd /home/wyp/Downloads/ [wyp@node1 Downloads]$ tar -zxf zookeeper.tar.gz [wyp@node1 Downloads]$ </td> 
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 <td align="left"> 并在node1的/home/wyp/zookeeper/myid文件中添加2。同理，node2的操作和上面一样，这里 就不说了。 6、分别在master、node1、node2机器上启动Zookeeper相关服务： </td> 
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 <td align="left"> [wyp@master Downloads]$ $ZOOKEEPER_HOME/bin/zkServer.sh start JMX enabled by default Using config: /home/wyp/Downloads/zookeeper-3.4.5/bin/../conf/zoo.cfg Starting zookeeper ... STARTED </td> 
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 <td align="left"> 这样就安装并启动了Zookeeper分布式集群。 7、测试Zookeeper是否安装成功： </td> 
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 <td align="left"> [wyp@master Downloads]$ $ZOOKEEPER_HOME/bin/zkCli.sh -server master:2181 </td> 
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 <td align="left"> ##########################################、 这里输出一大推信息，就不列出 ########################################## [zk: master:2181(CONNECTED) 0] ls / [zookeeper] [zk: master:2181(CONNECTED) 1] ls / [zookeeper] [zk: master:2181(CONNECTED) 2] create /wyp hello（/wyp为创建的文件名，内容为hello） Created /wyp [zk: master:2181(CONNECTED) 3] ls / [wyp, zookeeper] [zk: master:2181(CONNECTED) 4] get /wyp hello cZxid = 0x100000004 ctime = Sun Jan 19 15:08:58 CST 2014 mZxid = 0x100000004 mtime = Sun Jan 19 15:08:58 CST 2014 pZxid = 0x100000004 cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 5 numChildren = 0 [zk: master:2181(CONNECTED) 5] set /wyp zookeeper cZxid = 0x100000004 
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 <td align="left"> mZxid = 0x100000005 mtime = Sun Jan 19 15:09:31 CST 2014 pZxid = 0x100000004 cversion = 0 dataVersion = 1 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 9 numChildren = 0 [zk: master:2181(CONNECTED) 6] get /wyp zookeeper cZxid = 0x100000004 ctime = Sun Jan 19 15:08:58 CST 2014 mZxid = 0x100000005 mtime = Sun Jan 19 15:09:31 CST 2014 pZxid = 0x100000004 cversion = 0 dataVersion = 1 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 9 numChildren = 0 [zk: master:2181(CONNECTED) 7] delete /wyp [zk: master:2181(CONNECTED) 8] ls / [zookeeper] [zk: master:2181(CONNECTED) 9] quit Quitting... 2014-01-19 15:10:07,064 [myid:] - INFO&nbsp; [main-EventThread: ClientCnxn$EventThread@509] - EventThread shut down 2014-01-19 15:10:07,064 [myid:] - INFO&nbsp; [main:ZooKeeper@684] - Session: 0x143a94f84230001 closed [wyp@master Downloads]$ </td> 
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好了，至此整个 Zookeeper 已经安装完成。

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