zookeeper集群

源码安装至/usr/local/zookeeper

配置 /usr/local/zookeeper/conf/zoo.cfg

server.1=node1:2888:3888
server.2=node2:2888:3888
server.3=node3:2888:3888
server.4=nn01:2888:3888:observer

拷贝安装目录至所有集群主机

rsync -aSH --delete /usr/local/zookeeper node1:/usr/local/
...

创建myid文件，id必须与配置文件里主机名对应的server.(id)一致

[root@nn01 local]# echo 4 > /tmp/zookeeper/myid
[root@nn01 local]# ssh node3 'echo 3 >/tmp/zookeeper/myid'
[root@nn01 local]# ssh node2 'echo 2 >/tmp/zookeeper/myid'
[root@nn01 local]# ssh node1 'echo 1 >/tmp/zookeeper/myid'

所有集群主机启动服务

 /usr/local/zookeeper/bin/zkServer.sh start
 /usr/local/zookeeper/bin/zkServer.sh status   # 查看状态

确认主机状态

[root@nn01 local]# echo 'ruok' | socat - TCP:node3:2181
imok[root@nn01 local]# 

　[root@nn01 local]# echo 'stat' | socat - TCP:node3:2181　　

脚本

#!/bin/bash
function get_zkstat(){
    exec 2</dev/null 8<>/dev/tcp/$1/2181
    echo "stat" >&8
    _S=$(cat <&8|grep -Po "^Mode:.*")
    echo -e "$1	${_S:-Mode: NULL}"
    exec 8<&-
}

if (( $# == 0 ));then
   echo "Usage: $0 host1 host2 host3 ... ..."
else
   for i in $@;do get_zkstat ${i};done
fi

[root@nn01 local]# sh /root/zkstatus.sh node{1..3} nn01
node1    Mode: follower
node2    Mode: follower
node3    Mode: leader
nn01    Mode: observer