搭建 Zookeeper 集羣環境

搭建 Zookeeper 集羣環境

  1. 下載安裝包

     # 下載
     wget https://apache.org/dist/zookeeper/stable/apache-zookeeper-3.5.5-bin.tar.gz
    # 解壓
    tar -zxvf apache-zookeeper-3.5.5-bin.tar.gz
    # 移動到要安裝的目錄並 cd 進入相應路徑
    # 。。。命令省略。。。
    
  2. 配置 zoo.cfg 文件

    # 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=/home/shaw/data/zookeeper
    # 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
    
    ###### 配置分佈式集羣 ######
    server.1=192.168.100.117:2888:3888
    server.2=192.168.100.118:2888:3888
    server.3=192.168.100.119:2888:3888
    

    注:

    1. 上面的配置中,Zookeeper 的數據目錄配置爲 /home/shaw/data/zookeeper
    2. 配置中的 192.168.100.117192.168.100.118192.168.100.117 爲三個 zookeeper 集羣服務器的 IP 地址;
    3. 配置中的 28883888 分別爲集羣間進行通信、選舉的端口;
    4. server.1server.2server.3 中的 123分別對應 /home/shaw/data/zookeeper/myid 中的內容,例如 server.1 服務器上的 /home/shaw/data/zookeeper/myid 內容便是 1server.2 服務器上的 /home/shaw/data/zookeeper/myid 內容便是 2
  3. 在 zookeeper 的數據目錄(本例中爲 /home/shaw/data/zookeeper)下配置 myid;

  4. 啓動各個服務器上的 zookeeper 服務:

    ./bin/zkServer.sh start
    
  5. 查看各個服務器上的 zookeeper 啓動狀態:

    ./bin/zkServer.sh status
    
  6. 連接到 zookeeper 服務器:

    # 連接到 192.168.100.117 zookeeper 服務器,端口號 2181
    ./bin/zkCli.sh -server 192.168.100.117:2181
    
  7. 一些常用命令:

    # 查看根目錄下的節點
    ls /
    
    # 創建 /shawearn 節點
    create /shawearn
    # 或創建的同時指定節點值
    create /shawearn hello
    
    # 查看節點值
    get /shawearn
    
    # 設置節點值
    set /shawearn HelloWorld!
    
    # 刪除指定節點,節點下面必須不含子節點
    delete /shawearn
    
    # 刪除指定節點及其下屬所有節點
    deleteall /shawearn
    
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