Zookeeper集群安装
[*]在根目录创建zookeeper文件夹（service1、service2、service3都创建）
# mkdir zookeeper
通过Xshell上传文件到service1服务器：上传zookeeper-3.4.6.tar.gz到/software文件夹
2.远程copy将service1下的/software/zookeeper-3.4.6.tar.gz到service2、service3
# scp -r /software/zookeeper-3.4.6.tar.gz root@192.168.2.212:/software/
# scp -r /software/zookeeper-3.4.6.tar.gz root@192.168.2.213:/software/
3.copy /software/zookeeper-3.4.6.tar.gz到/zookeeper/目录（service1、service2、service3都执行）
# cp /software/zookeeper-3.4.6.tar.gz /zookeeper/
4.安装解压zookeeper-3.4.6.tar.gz（service1、service2、service3都执行）
# cd /zookeeper/
# tar -zxvf zookeeper-3.4.6.tar.gz
5.在/zookeeper创建两个目录：zkdata、zkdatalog（service1、service2、service3都创建）
# mkdir zkdata
# mkdir zkdatalog
6.进入/zookeeper/zookeeper-3.4.6/conf/目录
# cd /zookeeper/zookeeper-3.4.6/conf/
# ls
configuration.xsllog4j.propertieszoo.cfgzoo_sample.cfg
[*]修改zoo.cfg文件
The number of milliseconds of each tick
tickTime=2000
The number of ticks that the initial
synchronization phase can take
initLimit=10
The number of ticks that can pass between
sending a request and getting an acknowledgement
syncLimit=5
the directory where the snapshot is stored.
do not use /tmp for storage, /tmp here is just
example sakes.
dataDir=/zookeeper/zkdata
dataLogDir=/zookeeper/zkdatalog
the port at which the clients will connect
clientPort=2181
the maximum number of client connections.
increase this if you need to handle more clients
#maxClientCnxns=60
Be sure to read the maintenance section of the
administrator guide before turning on autopurge.
The number of snapshots to retain in dataDir
autopurge.snapRetainCount=3
Purge task interval in hours
Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1
server.1=192.168.2.211:12888:13888
server.2=192.168.2.212:12888:13888
server.3=192.168.2.213:12888:13888
[*]同步修改service2、service3的zoo.cfg配置
[*]myid文件写入（进入/zookeeper/zkdata目录下）
# cd /zookeeper/zkdata
# echo 1 > myid
[*]myid文件写入service2、service3
echo 2 > myid
echo 3 > myid
11.查看zk命令：
# cd /zookeeper/zookeeper-3.4.6/bin/
# ls
README.txtzkCleanup.shzkCli.cmdzkCli.shzkEnv.cmdzkEnv.shzkServer.cmdzkServer.shzookeeper.out
12.执行zkServer.sh查看详细命令：
# ./zkServer.sh
JMX enabled by default
Using config: /zookeeper/zookeeper-3.4.6/bin/../conf/zoo.cfg
Usage: ./zkServer.sh {start|start-foreground|stop|restart|status|upgrade|print-cmd}
[*]在service1、service2、service3分别启动zk服务
# ./zkServer.sh start
[*]jps查看zk进程
# jps
31483 QuorumPeerMain
31664 Jps
[*]分别在service1、service2、service3查看zk状态（可以看到leader和follower节点）
# ./zkServer.sh status
JMX enabled by default
Using config: /zookeeper/zookeeper-3.4.6/bin/../conf/zoo.cfg
Mode: follower
# ./zkServer.sh status
JMX enabled by default
Using config: /zookeeper/zookeeper-3.4.6/bin/../conf/zoo.cfg
Mode: leader
[*]看到leader和follower节点已经安装成功
11111111 66666666666666
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