ZooKeeper多机集群部署

ZooKeeper多机集群部署
为了获得可靠的zk服务，应该在多台服务器上部署多个zk，只要集群中大多数的zk服务启动了，那么总的zk服 务将是可用的。 在多台主机上搭建ZooKeeper集群的方式，与伪集群几乎是差不多的。

三台服务器上都需要执行如下操作：

安装好JDK

[root@zookeeper01 ~]#yum -y install java-1.8.0-openjdk*
[root@zookeeper01 ~]# java -version
java version "1.8.0_211"
Java(TM) SE Runtime Environment (build 1.8.0_211-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.211-b12, mixed mode)

安装好zookeeper

[root@zookeeper01 ~]# tar zxf zookeeper-3.4.14.tar.gz -C /usr/local/
[root@zookeeper01 ~]# vim /etc/profile
export ZOOKEEPER_HOME=/usr/local/zookeeper-3.4.14
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$ZOOKEEPER_HOME/bin:$PATH # 加入Java配置的PATH中
[root@zookeeper01 ~]# source /etc/profile
server0配置
[root@zookeeper01 ~]# mkdir -p /usr/local/zookeeper-3.4.14/{data,logs}
[root@zookeeper01 ~]# echo 0 > /usr/local/zookeeper-3.4.14/data/myid
[root@zookeeper01 ~]# cd /usr/local/zookeeper-3.4.14/conf/
[root@zookeeper01 conf]# cp zoo_sample.cfg zoo.cfg
[root@zookeeper01 conf]# egrep -v "^$|#" zoo.cfg # 修改配置文件为如下
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/usr/local/zookeeper-3.4.14/data/
clientPort=2181
dataLogDir=/usr/local/zookeeper-3.4.14/logs
server.0=192.168.171.134:2288:3388
server.1=192.168.171.135:2288:3388
server.2=192.168.171.140:2288:3388
[root@zookeeper01 conf]# zkServer.sh start # 启动实例
[root@zookeeper01 conf]# netstat -anput | grep java # 确定端口在监听

server1配置
[root@zookeeper02 ~]# mkdir -p /usr/local/zookeeper-3.4.14/{data,logs}
[root@zookeeper02 ~]# echo 1 > /usr/local/zookeeper-3.4.14/data/myid
[root@zookeeper02 ~]# cd /usr/local/zookeeper-3.4.14/conf/
[root@zookeeper02 conf]# scp root@192.168.171.134:/usr/local/zookeeper-3.4.14/conf/zoo.cfg ./
[root@zookeeper02 conf]# zkServer.sh start
[root@zookeeper02 conf]# netstat -anput | grep java

server2配置
[root@zookeeper03 ~]# mkdir -p /usr/local/zookeeper-3.4.14/{data,logs}
[root@zookeeper03 ~]# echo 2 > /usr/local/zookeeper-3.4.14/data/myid
[root@zookeeper03 ~]# cd /usr/local/zookeeper-3.4.14/conf/
[root@zookeeper03 conf]# scp root@192.168.171.134:/usr/local/zookeeper-3.4.14/conf/zoo.cfg ./
[root@zookeeper03 conf]# zkServer.sh start
[root@zookeeper03 conf]# netstat -anput | grep java

查看各zk节点的状态
[root@zookeeper01 /]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.14/bin/../conf/zoo.cfg
Mode: follower
[root@zookeeper02 /]# zkServer.sh status # 02服务器为leader
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.14/bin/../conf/zoo.cfg
Mode: leader
[root@zookeeper03 /]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.14/bin/../conf/zoo.cfg
Mode: follower