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zookeeper部署

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最新的版本可以通过官网 http://hadoop.apache.org/zookeeper/来获取，Zookeeper 的安装非常简单，下面将从单机模式和集群模式两个方面介绍 Zookeeper 的安装和配置。

单机模式

  1. 解压安装包zookerper-3.4.7.tar.gz

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    tar -xzvf zookerper-3.4.7.tar.gz

  2. 创建Zookeeper子目录

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    cp -r zookerper-3.4.7 zookerper

  3. 修改Zookeeper配置文件conf/zoo.cfg

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    # The number of milliseconds of each tick
    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=./data
    dataLogDir=./logs
    # the port at which the clients will connect
    clientPort=2181
    # the maximum number of client connections.
    # increase this if you need to handle more clients
    #maxClientCnxns=60
    #
    # Be sure to read the maintenance section of the 
    # administrator guide before turning on autopurge.
    #
    # http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
    #
    # The number of snapshots to retain in dataDir
    #autopurge.snapRetainCount=3
    # Purge task interval in hours
    # Set to "0" to disable auto purge feature
    #autopurge.purgeInterval=1

  4. 运行

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    $ cd bin
    $ ./zkServer.sh start

  5. 查看运行状态

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    ./zkServer.sh status

伪集群模式

  1. 新建两个directory

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    cp -r zookeeper/ zookerper1/
    cp -r zookeeper/ zookerper2/

  2. 修改Zookeeper配置文件conf/zoo.cfg,这里配置了3个实例

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    server.1=localhost:2887:3887
    server.2=localhost:2888:3888
    server.3=localhost:2889:3889

  3. 分别在data目录下添加myid文件

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    echo "1" > myid
    echo "2" > myid
    echo "3" > myid

  4. 分别运行3个实例

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