最详细且简单的zookeeper集群搭建教程（3.6.3）

环境准备

需要有三台 Centos7 服务器，并都需要完成下面的配置要求：

• 关闭防火墙
• 新建普通用户me
• 阿里云时钟同步服务器
• 配置免密登陆
• 关闭selinux
• 配置xsync、xcall同步脚本
• 配置jdk8环境
• 确保端口2188,2888端口没有被占用

环境准备可以参考我下面的博文：

centos防火墙常用命令

centos新建普通用户

centos系统时间同步

centos配置免密登录

centos关闭SElinux

centos配置xsync和xcall同步脚本

centos安装jdk8

集群规划

hostname	IP
master	10.0.0.87
node1	10.0.0.81
node2	10.0.0.82

正式安装

安装说明：

1. 除特别说明外，所有操作均在master节点、使用me这个非root用户执行
2. 命令中出现的IP，均需要替换为自己集群中的IP【必须】
3. 命令中出现的/home/lbs/software路径，可选择替换为自定义路径【可选】

1. 下载安装包，并解压到指定路径

   wget https://archive.apache.org/dist/zookeeper/zookeeper-3.6.3/apache-zookeeper-3.6.3-bin.tar.gz
   tar -zxvf apache-zookeeper-3.6.3-bin.tar.gz -C /home/lbs/software
   mv /home/lbs/software/apache-zookeeper-3.6.3-bin /home/lbs/software/zookeeper
   

2. 修改zoo.cfg配置文件

   cp /home/lbs/software/zookeeper/conf/zoo_sample.cfg /home/lbs/software/zookeeper/conf/zoo.cfg
   
   vim /home/lbs/software/zookeeper/conf/zoo.cfg
   
   # 修改如下内容
   dataDir=/home/lbs/software/zookeeper/data
   
   # 追加如下内容
   server.1=10.0.0.87:2188:2888
   server.2=10.0.0.81:2188:2888
   server.3=10.0.0.82:2188:2888
   

3. 创建数据存储目录和myid文件

   mkdir -p /home/lbs/software/zookeeper/data
   echo "1" > /home/lbs/software/zookeeper/data/myid
   

4. 将zookeeper目录分发到其他机器节点

   xsync /home/lbs/software/zookeeper
   

5. 登录到node1节点，执行下面的命令

   echo "2" > /home/lbs/software/zookeeper/data/myid
   

6. 登录到node2节点，执行下面的命令

   echo "3" > /home/lbs/software/zookeeper/data/myid
   

7. 回到master节点，编写创建操作zookeeper集群的脚本zkCluster.sh

   tee /home/lbs/software/zookeeper/bin/zkCluster.sh <<'EOF'
   #!/bin/bash
   case $1 in
   "start"){
        for i in master node1 node2
        do
                 echo -------------------------------- $i zookeeper 启动 ---------------------------
                ssh $i "source /etc/profile;/home/lbs/software/zookeeper/bin/zkServer.sh start"
        done
   }
   ;;
   "stop"){
        for i in master node1 node2
        do
                echo -------------------------------- $i zookeeper 停止 ---------------------------
                ssh $i "source /etc/profile;/home/lbs/software/zookeeper/bin/zkServer.sh stop"
        done
   }
   ;;
   "status"){
        for i in master node1 node2
        do
                echo -------------------------------- $i zookeeper 状态 ---------------------------
                ssh $i "source /etc/profile;/home/lbs/software/zookeeper/bin/zkServer.sh status"
        done
   }
   ;;
   esac
   EOF
   chmod +x /home/lbs/software/zookeeper/bin/zkCluster.sh
   

操作集群

# 启动集群
/home/lbs/software/zookeeper/bin/zkCluster.sh start

# 停止集群
/home/lbs/software/zookeeper/bin/zkCluster.sh stop

# 查看集群状态
/home/lbs/software/zookeeper/bin/zkCluster.sh status

如果启动报错JAVA_HOME is not set and java could not be found in PATH，查看解决方法

如需设置zookeeper集群密码，请参考# zookeeper集群设置密码

验证集群

1. 查看zookeeper集群进程情况

   [me@master bin]$ xcall jps
   ================current host is master=================
   --> execute command "jps"
   29777 Jps
   28340 QuorumPeerMain
   Command executed successfully on master
   ================current host is node1=================
   --> execute command "jps"
   6435 QuorumPeerMain
   6710 Jps
   Command executed successfully on node1
   ================current host is node2=================
   --> execute command "jps"
   6786 Jps
   6516 QuorumPeerMain
   Command executed successfully on node2
   All commands executed successfully!
   

2. 连接到zookeeper集群中

   /home/lbs/software/zookeeper/bin/zkCli.sh -server 127.0.0.1:2181
   
   # 输入ls，查看
   [zk: 127.0.0.1:2181(CONNECTED) 0] ls
   ls [-s] [-w] [-R] path