ZooKeeper教程(一)----Centos7下安装ZooKeeper(单机版)

1、下载源码

官网下载地址: http://mirrors.hust.edu.cn/apache/zookeeper/ 选择最新的版本进行下载

这里选择3.4.10进行下载:

wget http://mirrors.hust.edu.cn/apache/zookeeper/zookeeper-3.4.10/zookeeper-3.4.10.tar.gz

下载完成后执行以下命令进行解压:

tar -zxvf zookeeper-3.4.10.tar.gz

2、配置Zookeeper

解压之后,在zookeeper目录下创建以下目录:

[fendo@localhost ~]$ cd zookeeper-3.4.10/[fendo@localhost zookeeper-3.4.10]$ mkdir data[fendo@localhost zookeeper-3.4.10]$ mkdir logs

将zookeeper-3.4.10/conf目录下的zoo_sample.cfg文件拷贝一份,命名为zoo.cfg

[fendo@localhost conf]$ cp zoo_sample.cfg zoo.cfg

然后修改zoo.cfg文件

vim zoo.cfg

修改成如下

# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial # synchronization phase can takeinitLimit=10# The number of ticks that can pass between # sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.# do not use /tmp for storage, /tmp here is just # example sakes.dataDir=/home/fendo/zookeeper-3.4.10/datadataLogDir=/home/fendo/zookeeper-3.4.10/logs# the port at which the clients will connectclientPort=2181# the maximum number of client connections.# increase this if you need to handle more clients#maxClientCnxns=60server.1=192.168.84.130:2888:3888

其中:
2888端口号是zookeeper服务之间通信的端口。
3888是zookeeper与其他应用程序通信的端口。

然后在dataDir=/home/fendo/zookeeper-3.4.10/data下创建myid文件(编辑myid文件，并在对应的IP的机器上输入对应的编号。如在zookeeper上，myid 文件内容就是1。如果只在单点上进行安装配置，那么只有一个server.1)

vim myid

fendo用户下修改.bash_profile,增加zookeeper配置：

vim /home/fendo/.bash_profile

# zookeeper env export   ZOOKEEPER_HOME=/home/fendo/zookeeper-3.4.10 export   PATH=$ZOOKEEPER_HOME/bin:$PATH  

使配置文件生效 

source /home/fendo/.bash_profile

关闭防火墙

切换到root用户下,执行以下命令:

systemctl stop firewalld.service

3、测试Zookeeper

启动并测试zookeeper(要用普通用户启动，不要用root):

#使用fendo用户到/home/fendo/zookeeper-3.4.10/bin目录中执行  ./zkServer.sh start    #查看进程jps其中,QuorumPeerMain是zookeeper进程,启动正常。  #查看状态  ./zkServer.sh status    #服务器输出信息  tail -500f zookeeper.out    #停止zookeeper进程  ./zkServer.sh stop 

设置zookeeper服务开机启动

# 切换到/etc/rc.d/init.d/目录下  cd /etc/rc.d/init.d    # 创建zookeeper文件  touch zookeeper    #更新权限  chmod +x zookeeper    #编辑文件，在zookeeper里面输入如下内容  #!/bin/bash  #chkconfig:2345 20 90  #description:zookeeper  #processname:zookeeper  export JAVA_HOME=/user/local/java/jdk1.7.0_79  export PATH=$JAVA_HOME/bin:$PATH  case $1 in            start)su root /home/fendo/zookeeper-3.4.10/bin/zkServer.sh start;;            stop)su root /home/fendo/zookeeper-3.4.10/bin/zkServer.sh stop;;            status)su root /home/fendo/zookeeper-3.4.10/bin/zkServer.sh status;;            restart)su root /home/fendo/zookeeper-3.4.10/bin/zkServer.sh restart;;            *)  echo "require start|stop|status|restart"  ;;  esac  

然后我们就可以用service zookeeper start/stop来启动停止zookeeper服务了

使用命令把zookeeper添加到开机启动里面

chkconfig zookeeper on  chkconfig --add zookeeper

添加完成之后接这个使用chkconfig --list 来看看我们添加的zookeeper是否在里面。