zookeeper集群安装

环境准备

• zookeeper安装包：http://www-eu.apache.org/dist/zookeeper/stable/zookeeper-3.4.12.tar.gz

• centos + java 运行环境，这里我分别准备三台centos虚拟机192.168.146.151，192.168.146.152，192.168.146.153

安装配置

• 解压zookeeper安装包，tar -zxvf zookeeper-3.4.12.tar.gz ,解压后目录

  zookeeper_list

• 添加zookeeper配置，进入conf目录，使用cp zoo_sample.cfg zoo.cfg 复制zoo_sample.cfg为zoo.cfg

  修改后配置

  # 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=/tmp/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
  server.1=192.168.146.151:2188:3181
  server.2=192.168.146.152:2188:3181
  server.3=192.168.146.153:2188:3181
  

  主要配置说明

  ​ clientPort运行端口号

  ​ dataDir数据存储位置

  myid设置

  ​ 当安装zookeeper集群环境时要在dataDir目录下创建当前zookeeper的myid

  ​ 如我在192.168.146.151机器上创建在/tmp/zookeeper/myid文件，文件内容为1，依次类推 。

  添加server集群配置

  ​ server.1=192.168.146.151:2188:3181-->server.myid=ip:clientPort:prot，有几台机器添加几条配置 ，注意两个端口号不可以重复（如果重复会出现端口号重复的问题）,如上配置。

• 启动运行，进入每台机器zookeeper目录中的bin文件夹，运行zkServer.sh脚本，如 sh zkServer.sh start ,运行时可在启动目录下查看zookeeper.out 控制台日志。

• 启动好了可通过运行bin目录下的zkCli.sh脚本连接zookeeper，如

  zkclient.png

  也可通过sh zkServer.sh status 查看当前zookeeper是什么角色

注：zookeeper 集群角色分为leader、follower、observer，这里我配置的只有leader和follower，要台添加一台observer机器，在server配置后面标记为observer如：server.4=192.168.146.154:2188:3181:observer