Zookeeper 集群安装及操作（入门级）

1 集群操作 
1.1 集群安装 
1）集群规划 
在 master、slave1 和 slave2 三个节点上都部署 Zookeeper。 
2）解压安装 
（1）在 hadoop102 解压 Zookeeper 安装包到/opt/apps/目录下 

[root@master softs]# tar -zxvf apache-zookeeper-3.5.7-bin.tar.gz -C /opt/apps/

（2）修改 apache-zookeeper-3.5.7-bin 名称为 zookeeper-3.5.7 

[root@master apps]# mv apache-zookeeper-3.5.7-bin zookeeper-3.5.7

3）配置服务器编号 
（1）在/opt/module/zookeeper-3.5.7/这个目录下创建 zkData 

[root@master zookeeper-3.5.7]# mkdir zkData

（2）在/opt/module/zookeeper-3.5.7/zkData 目录下创建一个 myid 的文件 

[root@master zookeeper-3.5.7]# cd zkData/
[root@master zkData]# touch myid

[root@master zkData]# vi myid

（注意：上下不要有空行，左右不要有空格）
注意：添加 myid 文件， master为0，slave1为1，slave2为2。

3）配置zoo.cfg文件 
（1）重命名/opt/module/zookeeper-3.5.7/conf 这个目录下的 zoo_sample.cfg 为 zoo.cfg 

[root@master conf]# mv zoo_sample.cfg zoo.cfg 

（2）打开 zoo.cfg 文件 

[root@master conf]# vi zoo.cfg

#修改数据存储路径配置 

dataDir=/opt/apps/zookeeper-3.5.7/zkData 

#增加如下配置 

server.0=master:2888:3888 
server.1=slave1:2888:3888 
server.2=slave2:2888:3888 

4）拷贝配置好的 zookeeper 到其他机器上 

[root@master module ]$ xsync zookeeper-3.5.7 

并分别在 slave1、slave2 上修改 myid 文件中内容为 1、2 
5）集群操作 
（1）分别启动 Zookeeper 

 启动前：三台机房分布关闭防火墙

[root@slave2 ~]# systemctl status firewalld

[root@slave1 ~]# systemctl status firewalld

[root@master ~]# systemctl status firewalld

启动命令

[root@master zookeeper-3.5.7]$ bin/zkServer.sh start

master

[root@master zookeeper-3.5.7]# bin/zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/apps/zookeeper-3.5.7/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@master zookeeper-3.5.7]# jps
1648 Jps
1609 QuorumPeerMain

[root@master zookeeper-3.5.7]# bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/apps/zookeeper-3.5.7/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower

slave1

[root@slave1 zookeeper-3.5.7]# bin/zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/apps/zookeeper-3.5.7/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@slave1 zookeeper-3.5.7]# jps
1507 Jps
1462 QuorumPeerMain

[root@slave1 zookeeper-3.5.7]# bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/apps/zookeeper-3.5.7/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: leader

slave2

[root@slave2 zookeeper-3.5.7]# bin/zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/apps/zookeeper-3.5.7/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
[root@slave2 zookeeper-3.5.7]# jps
1489 QuorumPeerMain
1527 Jps

[root@slave2 zookeeper-3.5.7]# bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/apps/zookeeper-3.5.7/bin/../conf/zoo.cfg
Client port found: 2181. Client address: localhost.
Mode: follower