一、集群规划

在3台虚拟机节点上安装ZooKeeper：

1. cloud-01
2. cloud-02
3. cloud-03

   二、安装解压

   1.下载ZooKeeper

   apache镜像下载太慢，故选择清华镜像

   nzx@cloud-01:/opt/nzx/module/zookeeper-3.5.8$ wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.5.8/apache-zookeeper-3.5.8-bin.tar.gz

   2.解压安装

   nzx@cloud-01:/opt/nzx/module/zookeeper-3.5.8$ tar -zxvf apache-zookeeper-3.5.8-bin.tar.gz
   nzx@cloud-01:/opt/nzx/module/zookeeper-3.5.8$ mv apache-zookeeper-3.5.8-bin /opt/nzx/module/zookeeper-3.5.8
   nzx@cloud-01:/opt/nzx/module/zookeeper-3.5.8$ xsync /opt/nzx/module/zookeeper-3.5.8
   

   三、ZooKeeper配置

   1.配置服务器编号

   nzx@cloud-01:/opt/nzx/module/zookeeper-3.5.8$ pwd
   /opt/nzx/module/zookeeper-3.5.8
   nzx@cloud-01:/opt/nzx/module/zookeeper-3.5.8$ mkdir -p zkData
   nzx@cloud-01:/opt/nzx/module/zookeeper-3.5.8$ touch zkData/myid
   

   在myid文件中，cloud-01写入数字1，cloud-02写入数字2，cloud-03写入数字3

   2.配置zoo.cfg

   nzx@cloud-01:/opt/nzx/module/zookeeper-3.5.8/conf$ mv zoo_sample.cfg zoo.cfg
   

   修改zoo.cfg:

• 修改存储路径设置：

dataDir=/opt/nzx/module/zookeeper-3.5.8/zkData

• 添加集群配置信息：

######################cluster############################
server.1=cloud-01:2888:3888
server.2=cloud-02:2888:3888
server.3=cloud-03:2888:3888

server.A=B:C:D：

• A：第几号服务器
• B：服务器的IP地址
• C：这个服务器与leader交换信息的端口
• D：选举新的leader的通信端口

  四、启动ZooKeeper

  nzx@cloud-01:/opt/nzx/module/zookeeper-3.5.8$ bin/zkServer.sh start
  nzx@cloud-02:/opt/nzx/module/zookeeper-3.5.8$ bin/zkServer.sh start
  nzx@cloud-03:/opt/nzx/module/zookeeper-3.5.8$ bin/zkServer.sh start
  

  五、查看ZooKeeper状态

  nzx@cloud-01:/opt/nzx/module/zookeeper-3.5.8$ bin/zkServer.sh status
  ZooKeeper JMX enabled by default
  Using config: /opt/nzx/module/zookeeper-3.5.8/bin/../conf/zoo.cfg
  Client port found: 2181. Client address: localhost.
  Mode: follower
  

  nzx@cloud-02:/opt/nzx/module/zookeeper-3.5.8$ bin/zkServer.sh status
  ZooKeeper JMX enabled by default
  Using config: /opt/nzx/module/zookeeper-3.5.8/bin/../conf/zoo.cfg
  Client port found: 2181. Client address: localhost.
  Mode: leader
  

  nzx@cloud-03:/opt/nzx/module/zookeeper-3.5.8$ bin/zkServer.sh status
  ZooKeeper JMX enabled by default
  Using config: /opt/nzx/module/zookeeper-3.5.8/bin/../conf/zoo.cfg
  Client port found: 2181. Client address: localhost.
  Mode: follower