Zookeeper的安装与集群搭建（二）Zookeeper集群安装

• 主机规划

分配四台虚拟主机

主机名	OS	IP	用途	备注
CentOS 7_107	CentOS7	192.168.1.107	ZooKeeper
CentOS 7_108	CentOS7	192.168.1.108	ZooKeeper
CentOS 7_109	CentOS7	192.168.1.109	ZooKeeper
CentOS 7_110	CentOS7	192.168.1.110	ZooKeeper	observe

• 修改配置文件

在这四台主机上安装完成Zookeeper后

分别对其配置

1.修改zoo.cfg文件

增加集群的配置

server.1=192.168.1.107:2888:3888
server.2=192.168.1.108:2888:3888
server.3=192.168.1.109:2888:3888
server.4=192.168.1.110:2888:3888:observer

2.创建myid

分别在四台主机下usr/data/zookeeper目录下设置myid

myid的值对应于配置的server.X，如107设置为1,108设置为2，109设置为3,110设置于为4

cd /usr/data/zookeeper

107主机下

echo 1 > myid

108主机下

echo 2 > myid

109主机下

echo 3 > myid

110主机下

echo 4 > myid

3.在observer主机（110主机）zoo.cfg增加peerType=observer

• 启动Zookeeper集群

依次对四台主机启动Zookeeper

./zkServer.sh status

分别查看Zookeeper状态

107主机：

[root@test2 bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/app/zookeeper/bin/../conf/zoo.cfg
Mode: follower

 108主机

[root@test1 bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/app/zookeeper/bin/../conf/zoo.cfg
Mode: leader

109主机

[root@test3 bin]# ./zkServer.sh status

ZooKeeper JMX enabled by default

Using config: /usr/local/app/zookeeper/bin/../conf/zoo.cfg

Mode: follower

110主机

[root@localhost bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/app/zookeeper/bin/../conf/zoo.cfg
Mode: observer

显示的信息中Mode的内容就能看出谁是leader谁是follower，谁是observer