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linux安装配置zookeeper-3.4.10

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1.环境介绍

本次实验采用三台虚拟机(必须为奇数个),操作系统为centos6.4
三台机器已经做了ssh互信,具体IP地址主机名如下:
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[hadoop@hadoop1 conf]$ cat /etc/hosts
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127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
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::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
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192.168.56.15 basic
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192.168.56.1 PC-201306171517
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192.168.56.21 hadoop1
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192.168.56.22 hadoop2
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192.168.56.23 hadoop3
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2.下载zookeeper

zookeeper下载地址如下:
http://mirror.bit.edu.cn/apache/zookeeper/
我这里选择stable版本3.4.10.

3.解压缩zookeeper

只需要先在一台机器上做安装配置,再将目录拷贝到其它主机上.在主机hadoop1上解压缩zookeeper
将解压缩后的文件夹拷贝到安装目录中:
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[hadoop@hadoop1 soft]$ mv zookeeper-3.4.10 /hadoop/zookeeper/

4.配置zookeeper

将默认的配置文件zoo_sample.cfg改名为zoo.cfg
修改配置文件zoo.cfg:
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[hadoop@hadoop1 conf]$ vi zoo.cfg
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# The number of milliseconds of each tick
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tickTime=2000
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# The number of ticks that the initial
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# synchronization phase can take
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initLimit=10
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# The number of ticks that can pass between
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# sending a request and getting an acknowledgement
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syncLimit=5
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# the directory where the snapshot is stored.
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# do not use /tmp for storage, /tmp here is just
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# example sakes.
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dataDir=/hadoop/zookeeper/data      ###################这里是zookeeper快照目录,建议根据实际修改
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# the port at which the clients will connect
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clientPort=2181
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# the maximum number of client connections.
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# increase this if you need to handle more clients
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#maxClientCnxns=60
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server.1=hadoop1:2888:3888          ####################server.1中的1是id,后面是主机名和端口号
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server.2=hadoop2:2888:3888
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server.3=hadoop3:2888:3888
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#
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# Be sure to read the maintenance section of the
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# administrator guide before turning on autopurge.
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#
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# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
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#
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# The number of snapshots to retain in dataDir
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#autopurge.snapRetainCount=3
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# Purge task interval in hours
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# Set to "0" to disable auto purge feature
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#autopurge.purgeInterval=1
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根据zoo.cfg创建zookeeper快照目录
在data目录中新建myid文件,文件内容为server.id中的id号
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[hadoop@hadoop1 data]$ pwd
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/hadoop/zookeeper/data
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[hadoop@hadoop1 data]$ echo "1" > myid

5.其它节点安装

其它节点安装只需要将整个zookeeper目录拷贝到相同的文件夹下面,并且修改data下的myid文件,修改为各自的id:

6.启动zookeeper

为了方便可以将zookeeper的可执行文件目录添加到PATH环境变量中:
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PATH=/hadoop/zookeeper/bin:$HIVE_HOME/bin:/hadoop/pig/bin:$JAVA_HOME/bin:$PATH:$HOME/bin:/hadoop/hadoop/bin:/hadoop/hadoop/sbin
分别在每个节点上执行zkServer.sh start:
查看zookeeper的状态,可以发现一个是leader,其它两个是follower:
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[hadoop@hadoop3 data]$ zkServer.sh status
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ZooKeeper JMX enabled by default
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Using config: /hadoop/zookeeper/bin/../conf/zoo.cfg
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Mode: follower
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[hadoop@hadoop2 hadoop]$ zkServer.sh status
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ZooKeeper JMX enabled by default
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Using config: /hadoop/zookeeper/bin/../conf/zoo.cfg
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Mode: leader
查看进程信息:

7.连接zookeeper集群

使用zkCli.sh -server IP:PORT来连接zookeeper集群,具体语法如下:
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[hadoop@hadoop1 data]$ zkCli.sh -server 127.0.0.1:2181
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Connecting to 127.0.0.1:2181
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2017-09-04 21:39:29,785 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.10-39d3a4f269333c922ed3db283be479f9deacaa0f, built on 03/23/2017 10:13 GMT
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2017-09-04 21:39:29,788 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=hadoop1
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2017-09-04 21:39:29,789 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.8.0_131
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2017-09-04 21:39:29,791 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
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2017-09-04 21:39:29,791 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/local/jdk1.8.0_131/jre
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2017-09-04 21:39:29,791 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/hadoop/zookeeper/bin/../build/classes:/hadoop/zookeeper/bin/../build/lib/*.jar:/hadoop/zookeeper/bin/../lib/slf4j-log4j12-1.6.1.jar:/hadoop/zookeeper/bin/../lib/slf4j-api-1.6.1.jar:/hadoop/zookeeper/bin/../lib/netty-3.10.5.Final.jar:/hadoop/zookeeper/bin/../lib/log4j-1.2.16.jar:/hadoop/zookeeper/bin/../lib/jline-0.9.94.jar:/hadoop/zookeeper/bin/../zookeeper-3.4.10.jar:/hadoop/zookeeper/bin/../src/java/lib/*.jar:/hadoop/zookeeper/bin/../conf:
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2017-09-04 21:39:29,791 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
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2017-09-04 21:39:29,791 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
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2017-09-04 21:39:29,791 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=<NA>
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2017-09-04 21:39:29,791 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux
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2017-09-04 21:39:29,791 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=amd64
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2017-09-04 21:39:29,791 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=2.6.32-358.el6.x86_64
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2017-09-04 21:39:29,791 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=hadoop
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2017-09-04 21:39:29,791 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/home/hadoop
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2017-09-04 21:39:29,792 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/hadoop/zookeeper/data
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2017-09-04 21:39:29,796 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@506c589e
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Welcome to ZooKeeper!
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2017-09-04 21:39:29,899 [myid:] - INFO  [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
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JLine support is enabled
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2017-09-04 21:39:30,093 [myid:] - INFO  [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@876] - Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session
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[zk: 127.0.0.1:2181(CONNECTING) 0] 2017-09-04 21:39:30,223 [myid:] - INFO  [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1299] - Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x15e4d06c91b0000, negotiated timeout = 30000
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WATCHER::
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WatchedEvent state:SyncConnected type:None path:null
使用help可以查看相关命令帮助:
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[zk: 127.0.0.1:2181(CONNECTED) 0] help
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ZooKeeper -server host:port cmd args
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    stat path [watch]
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    set path data [version]
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    ls path [watch]
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    delquota [-n|-b] path
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    ls2 path [watch]
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    setAcl path acl
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    setquota -n|-b val path
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    history
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    redo cmdno
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    printwatches on|off
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    delete path [version]
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    sync path
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    listquota path
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    rmr path
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    get path [watch]
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    create [-s] [-e] path data acl
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    addauth scheme auth
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    quit
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    getAcl path
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    close
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    connect host:port
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[zk: 127.0.0.1:2181(CONNECTED) 1]
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