docker环境搭建zk集群

序

对于个人开发者而言，学习分布式的好多东东，都比较费劲，因为手头的机器不够。若是单机使用虚拟机来启动一个个虚拟server话，又比较耗费资源，要求单机性能够好。幸好docker这种轻量级的东东出现了。本文主要是记录使用docker搭建zk集群的过程。

下载zk镜像

这次使用garland搭好的镜像。

docker pull garland/zookeeper

构建zk集群

docker run -d \
 --name=zk1 \
 --net=host \
 -e SERVER_ID=1 \
 -e ADDITIONAL_ZOOKEEPER_1=server.1=localhost:2888:3888 \
 -e ADDITIONAL_ZOOKEEPER_2=server.2=localhost:2889:3889 \
 -e ADDITIONAL_ZOOKEEPER_3=server.3=localhost:2890:3890 \
 -e ADDITIONAL_ZOOKEEPER_4=clientPort=2181 \
 garland/zookeeper

docker run -d \
 --name=zk2 \
 --net=host \
 -e SERVER_ID=2 \
 -e ADDITIONAL_ZOOKEEPER_1=server.1=localhost:2888:3888 \
 -e ADDITIONAL_ZOOKEEPER_2=server.2=localhost:2889:3889 \
 -e ADDITIONAL_ZOOKEEPER_3=server.3=localhost:2890:3890 \
 -e ADDITIONAL_ZOOKEEPER_4=clientPort=2182 \
 garland/zookeeper

docker run -d \
 --name=zk3 \
 --net=host \
 -e SERVER_ID=3 \
 -e ADDITIONAL_ZOOKEEPER_1=server.1=localhost:2888:3888 \
 -e ADDITIONAL_ZOOKEEPER_2=server.2=localhost:2889:3889 \
 -e ADDITIONAL_ZOOKEEPER_3=server.3=localhost:2890:3890 \
 -e ADDITIONAL_ZOOKEEPER_4=clientPort=2183 \
 garland/zookeeper

查看集群

查看zk1(follower)

root@xixicat:~# echo stat | nc 127.0.0.1 2181
Zookeeper version: 3.4.6-1569965, built on 02/20/2014 09:09 GMT
Clients:
 /127.0.0.1:55531[0](queued=0,recved=1,sent=0)

Latency min/avg/max: 0/1/31
Received: 63
Sent: 62
Connections: 1
Outstanding: 0
Zxid: 0x100000005
Mode: follower
Node count: 5

查看zk2(leader)

root@xixicat:~# echo stat | nc 127.0.0.1 2182
Zookeeper version: 3.4.6-1569965, built on 02/20/2014 09:09 GMT
Clients:
 /127.0.0.1:53244[0](queued=0,recved=1,sent=0)

Latency min/avg/max: 0/0/0
Received: 1
Sent: 0
Connections: 1
Outstanding: 0
Zxid: 0x100000005
Mode: leader
Node count: 5

查看zk3(follower)

root@xixicat:~# echo stat | nc 127.0.0.1 2183
Zookeeper version: 3.4.6-1569965, built on 02/20/2014 09:09 GMT
Clients:
 /127.0.0.1:33983[0](queued=0,recved=1,sent=0)

Latency min/avg/max: 0/0/0
Received: 1
Sent: 0
Connections: 1
Outstanding: 0
Zxid: 0x100000005
Mode: follower
Node count: 5