微系列：4、在Centos中，搭建Zookeeper集群

一、环境准备

1、需安装Java环境并配置环境变量

https://jdk.java.net/java-se-ri/11

2、下载Zookeeper（3.6.3）

压缩包并解压 https://zookeeper.apache.org/releases.html

3、配置防火墙，开放相关端口.

二、修改配置

进入Zookeeper目录下的conf目录，修改zoo_sample.cfg配置文件内容为

修改以下配置，

# 数据目录dataDir=/var/lib/zookeeper/# 集群各节点信息server.1=192.168.0.11:2888:3888server.2=192.168.0.12:2888:3888server.3=192.168.0.13:2888:3888

三、启动

进入bin目录下，执行以下命令

在各个不同的服务器分别执行，启动多个服务。

./zkServer.sh start

Zookeeper会根据配置文件中的各节点信息，自动完成选举，并组建集群

四、设置开机启动

创建文件 /etc/rc.d/init.d/zookeeper

写入以下内容

#!/bin/bash## zookeeper  ---  this script is used to start and stop zookeeper## chkconfig:   - 80 12# description:  zookeeper is a centralized service for maintaining configuration information,naming,providing distributed synchronization,and providing group services. # processname: zookeeper
EXEC=/usr/local/apache-zookeeper-3.6.3-bin/bin/zkServer.shPIDFILE=/var/lib/zookeeper/zookeeper_server.pidcase "$1" in    start)        if [ -f $PIDFILE ]        then                echo "$PIDFILE exists, process is already running or crashed"        else                echo "Starting Zookeeper server..."                $EXEC start                echo "Zookeeper server started"        fi        ;;    stop)        if [ ! -f $PIDFILE ]        then                echo "$PIDFILE does not exist, process is not running"        else                PID=$(cat $PIDFILE)                echo "Stopping ..."                $EXEC stop                while [ -x /proc/${PID} ]                do                    echo "Waiting for Zookeeper to shutdown ..."                    sleep 1                done                echo "Zookeeper stopped"        fi        ;;    *)        echo "Please use start or stop as first argument"        ;;esac

添加可执行权限

chmod +x /etc/rc.d/init.d/zookeeper

注册为系统服务

chkconfig --add zookeeper

添加开机自启动

chkconfig zookeeper on

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