zookeeper（伪集群部署）

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zookeeper（伪集群部署）

ZooKeeper有三种安装方式：单机模式 & 伪集群模式 & 集群模式

单机模式：ZooKeeper以单实例的形式运 行在一台服务器上，适合测试环境。

伪集群模式：在一台服务器上跑多个ZooKeeper实例。

集群模式： ZooKeeper运行在多台服务器上，适合生产环境。

一、zookeeper单机伪集群部署

在一台主机上跑多个zk实例，每个zk实例对应一个独立的配置文件；但是每个配置文件的clientPort & dataDir & dataLogDir绝对不能相同，还需要在dataDir中创建myid文件来指定该dataDir对应的zk实例。

一台主机部署3个zookeeper实例：

服务	IP	端口
zookeeper1	192.168.5.25	2181
zookeeper2	192.168.5.25	2182
zookeeper3	192.168.5.25	2183

1.部署jdk

                 源码安装jdk

2.部署zookeeper

tar -xvf apache-zookeeper-3.6.2-bin.tar.gz -C /usr/local/
ln -s  /usr/local/apache-zookeeper-3.6.2-bin/  /usr/local/zookeeper

3.创建数据目录，日志目录，创建myid文件填入id值

mkdir -p /usr/local/zookeeper/data{1..3}
mkdir -p /usr/local/zookeeper/log{1..3}
echo 1 >/usr/local/zookeeper/data1/myid                    （id值需要和zoo.cfg配置文件中server.1对应）
echo 2 >/usr/local/zookeeper/data2/myid                    
echo 3 >/usr/local/zookeeper/data3/myid

4.创建zoo{1,2,3}.cfg配置文件

cd /usr/local/zookeeper/conf/
cp zoo_sample.cfg zoo1.cfg
cp zoo1.cfg zoo2.cfg
cp zoo1.cfg zoo3.cfg

5.修改zoo{1,2,3}.cfg

vim  zoo1.cfg
 
dataDir=/usr/local/zookeeper/data1
dataLogDir=/usr/local/zookeeper/log1
clientPort=2181
server.1=127.0.0.1:2887:3887
server.2=127.0.0.1:2888:3888
server.3=127.0.0.1:2889:3889

vim  zoo2.cfg
 
dataDir=/usr/local/zookeeper/data2
dataLogDir=/usr/local/zookeeper/log2
clientPort=2182
server.1=127.0.0.1:2887:3887
server.2=127.0.0.1:2888:3888
server.3=127.0.0.1:2889:3889

vim  zoo3.cfg
 
dataDir=/usr/local/zookeeper/data3
dataLogDir=/usr/local/zookeeper/log3
clientPort=2183
server.1=127.0.0.1:2887:3887
server.2=127.0.0.1:2888:3888
server.3=127.0.0.1:2889:3889

6.启动各实例

/usr/local/zookeeper/bin/zkServer.sh start /usr/local/zookeeper/conf/zoo1.cfg 
/usr/local/zookeeper/bin/zkServer.sh start /usr/local/zookeeper/conf/zoo2.cfg 
/usr/local/zookeeper/bin/zkServer.sh start /usr/local/zookeeper/conf/zoo3.cfg 

7.查看端口

[root@localhost ~]# netstat -anptu | grep java

 8.查看zookeeper状态

[root@localhost ~]# /usr/local/zookeeper/bin/zkServer.sh status /usr/local/zookeeper/conf/zoo1.cfg 
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/conf/zoo1.cfg
Client port found: 2181. Client address: localhost. Client SSL: false.
Mode: follower
[root@localhost ~]# /usr/local/zookeeper/bin/zkServer.sh status /usr/local/zookeeper/conf/zoo2.cfg  
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/conf/zoo2.cfg
Client port found: 2182. Client address: localhost. Client SSL: false.
Mode: leader
[root@localhost ~]# /usr/local/zookeeper/bin/zkServer.sh status /usr/local/zookeeper/conf/zoo3.cfg  
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/conf/zoo3.cfg
Client port found: 2183. Client address: localhost. Client SSL: false.
Mode: follower