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  • 在CentOS7上安装和使用ZooKeeper最新版本（V3.4.12）

    0.ZooKeeper文档

    http://zookeeper.apache.org/doc/r3.4.11/zookeeperOver.html

    1.准备

    在CentOS7上安装zookeeper时，如下工具必须要有：wget

    如果没有，则进行安装：

    yum -y install wget
     
    2.下载安装

    下载到本地

    1.  
      cd /usr/local/src
    2.  
    3.  
      wget   http://mirrors.hust.edu.cn/apache/zookeeper/zookeeper-3.4.12/zookeeper-3.4.12.tar.gz

    解压

    tar -xzvf zookeeper-3.4.12.tar.gz

    创建的安装目录，并移动解压后的目录到其下

    1.  
      mkdir -p ../zookeeper
    2.  
      mv zookeeper-3.4.12/ ../zookeeper

    创建数据目录，用于存放数据

    mkdir -p /var/lib/zookeeper

    创建配置

    1.  
      cd ../zookeeper/zookeeper-3.4.12/conf
    2.  
      cp zoo_sample.cfg zoo.cfg

    修改其中配置dataDir：

    vi zoo.cfg

    dataDir=/var/lib/zookeeper

    3.启动服务

    1.  
      cd ..
    2.  
      ./bin/zkServer.sh start

    输出如下信息，表示启动成功

    1.  
      Connecting to 127.0.0.1:2181
    2.  
      2018-02-09 14:56:10,914 [myid:] - INFO [main:Environment@100] - Client environment:zookeeper.version=3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0, built on 11/01/2017 18:06 GMT
    3.  
      2018-02-09 14:56:10,922 [myid:] - INFO [main:Environment@100] - Client environment:host.name=jiaodacailei-thinkpad-centos7
    4.  
      2018-02-09 14:56:10,922 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.8.0_161
    5.  
      2018-02-09 14:56:10,927 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
    6.  
      2018-02-09 14:56:10,927 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/local/jdk/jdk1.8.0_161/jre
    7.  
      2018-02-09 14:56:10,927 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/usr/local/zookeeper/zookeeper-3.4.11/bin/../build/classes:/usr/local/zookeeper/zookeeper-3.4.11/bin/../build/lib/*.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/slf4j-log4j12-1.6.1.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/slf4j-api-1.6.1.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/netty-3.10.5.Final.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/log4j-1.2.16.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/jline-0.9.94.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../lib/audience-annotations-0.5.0.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../zookeeper-3.4.11.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../src/java/lib/*.jar:/usr/local/zookeeper/zookeeper-3.4.11/bin/../conf::/usr/local/jdk/jdk1.8.0_161/lib/dt.jar:/usr/local/jdk/jdk1.8.0_161/lib/tools.jar:/usr/local/jdk/jdk1.8.0_161/jre/lib/dt.jar
    8.  
      2018-02-09 14:56:10,927 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
    9.  
      2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
    10.  
      2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=<NA>
    11.  
      2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux
    12.  
      2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64
    13.  
      2018-02-09 14:56:10,928 [myid:] - INFO [main:Environment@100] - Client environment:os.version=3.10.0-693.el7.x86_64
    14.  
      2018-02-09 14:56:10,929 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root
    15.  
      2018-02-09 14:56:10,929 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root
    16.  
      2018-02-09 14:56:10,929 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/usr/local/zookeeper/zookeeper-3.4.11
    17.  
      2018-02-09 14:56:10,932 [myid:] - INFO [main:ZooKeeper@441] - Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@579bb367
    18.  
      Welcome to ZooKeeper!
    19.  
      2018-02-09 14:56:10,983 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1035] - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
    20.  
      JLine support is enabled
    21.  
      2018-02-09 14:56:11,141 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@877] - Socket connection established to 127.0.0.1/127.0.0.1:2181, initiating session
    22.  
      [zk: 127.0.0.1:2181(CONNECTING) 0] 2018-02-09 14:56:11,242 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1302] - Session establishment complete on server 127.0.0.1/127.0.0.1:2181, sessionid = 0x1000150f9ff0000, negotiated timeout = 30000
    23.  
       
    24.  
      WATCHER::
    25.  
       
    26.  
      WatchedEvent state:SyncConnected type:None path:null

    4.启动客户端

    ./bin/zkCli.sh -server 127.0.0.1:2181

    输入如下，等待用户输入命令：

    [zk: 127.0.0.1:2181(CONNECTED) 0]

    5.获取帮助

    输入如下命令，可以获取帮助信息：

    help

    输出信息如下：

    1.  
      ZooKeeper -server host:port cmd args
    2.  
      stat path [watch]
    3.  
      set path data [version]
    4.  
      ls path [watch]
    5.  
      delquota [-n|-b] path
    6.  
      ls2 path [watch]
    7.  
      setAcl path acl
    8.  
      setquota -n|-b val path
    9.  
      history
    10.  
      redo cmdno
    11.  
      printwatches on|off
    12.  
      delete path [version]
    13.  
      sync path
    14.  
      listquota path
    15.  
      rmr path
    16.  
      get path [watch]
    17.  
      create [-s] [-e] path data acl
    18.  
      addauth scheme auth
    19.  
      quit
    20.  
      getAcl path
    21.  
      close
    22.  
      connect host:port

    上面是所有可以使用的命令

    6.ls命令

    ls /

    默认根节点下有一个zookeeper节点

    [zookeeper]

    7.创建节点

    创建节点采用create命令，创建之后查看根路径，发现多了一个节点；

    通过get命令，可以查询节点路径对应的数据

    1.  
      [zk: 127.0.0.1:2181(CONNECTED) 4] create /zk_test test_data
    2.  
      Created /zk_test
    1.  
      [zk: 127.0.0.1:2181(CONNECTED) 6] ls /
    2.  
      [zookeeper, zk_test]
    1.  
      [zk: 127.0.0.1:2181(CONNECTED) 7] get /zk_test
    2.  
      test_data
    3.  
      cZxid = 0x2
    4.  
      ctime = Fri Feb 09 15:19:11 CST 2018
    5.  
      mZxid = 0x2
    6.  
      mtime = Fri Feb 09 15:19:11 CST 2018
    7.  
      pZxid = 0x2
    8.  
      cversion = 0
    9.  
      dataVersion = 0
    10.  
      aclVersion = 0
    11.  
      ephemeralOwner = 0x0
    12.  
      dataLength = 9
    13.  
      numChildren = 0

    8.修改节点数据

    set命令可以修改路径对应的节点数据，修改后再通过get命令查看结果

    [zk: 127.0.0.1:2181(CONNECTED) 8] set /zk_test test_data_change
    cZxid = 0x2
ctime = Fri Feb 09 15:19:11 CST 2018
mZxid = 0x3
mtime = Fri Feb 09 15:21:31 CST 2018
pZxid = 0x2
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 16
numChildren = 0
    [zk: 127.0.0.1:2181(CONNECTED) 10] get /zk_test

    test_data_change
cZxid = 0x2
ctime = Fri Feb 09 15:19:11 CST 2018
mZxid = 0x3
mtime = Fri Feb 09 15:21:31 CST 2018
pZxid = 0x2
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 16
numChildren = 0

    9.删除节点

    delete命令可以删除路径对应的节点，删除之后，通过ls命令查看其父路径，可以看到节点已经减少一个

    1.  
      [zk: 127.0.0.1:2181(CONNECTED) 11] delete /zk_test
    2.  
      [zk: 127.0.0.1:2181(CONNECTED) 12] ls /
    3.  
      [zookeeper]

    10.退出客户端

    quit

    11.停止服务

    ./bin/zkServer.sh stop
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  • 原文地址：https://www.cnblogs.com/telwanggs/p/9513582.html
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