Centos7下安装ZooKeeper

1、下载源码

zookeeper 需要jdk的支持，需要先安装jdk

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 tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=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/data
dataLogDir=/home/fendo/zookeeper-3.4.10/logs
# the port at which the clients will connect
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
server.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。