CentOS -- Zookeeper installation and configure

1 JDK 1.8 must installed first

2 Get Zookeeper package

wget https://archive.apache.org/dist/zookeeper/zookeeper-3.4.9/zookeeper-3.4.9.tar.gz

3 Ucompress the package to /opt/zookeeper

4 Create Zookeeper service account

useradd -m zookeeper

#add below line to /etc/home/zookeeper/.bash_profile you may modify the mem size to 60-70% physical memory

export SERVER_JVMFLAGS="-server -XX:+AlwaysPreTouch -Xmx2048m -Xms2048m"

5 Single node configuration

vi /opt/zookeeper/conf/zoo.cfg #add below lines

tickTime=2000

dataDir=/var/zookeeper

clientPort=2181

6 Change Zookeeper directories permissions

cd /opt

chown -R zookeeper:zookeeper zookeeper

mkdir -p /var/zookeeper

chown -R zookeeper:zookeeper /var/zookeeper

7 Create system service script

vi /etc/init.d/zookeeper and add

#!/bin/bash

#chkconfig:2345 20 90

#description:zookeeper

#processname:zookeeper

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.212.b04-0.el7_6.x86_64

case $1 in

        start) su - zookeeper /opt/zookeeper/bin/zkServer.sh start;;

        stop) su -  zookeeper /opt/zookeeper/bin/zkServer.sh stop;;

        status) su - zookeeper /opt/zookeeper/bin/zkServer.sh status;;

        restart) su - zookeeper /opt/zookeeper/bin/zkServer.sh restart;;

        *) echo "require start|stop|status|restart" ;;

esac

8 add system service for zookeeper

chmod u+x /etc/init.d/zookeeper

chkconfig --add zookeeper

systemctl enable zookeeper

service zookeeper start