微系列：4、在Centos中，搭建Zookeeper集群

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

./zkServer.sh start

#!/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.sh
PIDFILE=/var/lib/zookeeper/zookeeper_server.pid
case "$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