8.1.常用命令
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启动ZK服务 |
bin/zkServer.sh start |
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查看ZK服务状态 |
bin/zkServer.sh status |
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停止ZK服务 |
bin/zkServer.sh stop |
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重启ZK服务 |
bin/zkServer.sh restart |
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连接服务器 |
zkCli.sh -server 127.0.0.1:2181 |
8.2 客户端连接
运行 zkCli.sh –server <ip>进入命令行工具
在192.168.106.82服务器上连接到192.168.106.81服务器下的zk
[root@hadoop3bin]# zkCli.sh -server 192.168.106.81:2181
8.3 查看znode路径
查看根目录：
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[zk: 192.168.106.81:2181(CONNECTED) 0] ls / [zookeeper, mygirls] |
查看其它节点中的内容
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[zk: 192.168.106.81:2181(CONNECTED) 1] ls /mygirls [liuyifei, angelababy] [zk: 192.168.106.81:2181(CONNECTED) 2] ls /zookeeper [quota] |
8.5.创建节点
创建testnode节点，关联字符串”zz”
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[zk: 192.168.106.81:2181(CONNECTED) 3] create /zookeeper/testnode "zzzzzzz" Created /zookeeper/testnode |
8.6 获取znode数据，查看节点内容，设置节点内容，删除节点
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[zk: 192.168.106.81:2181(CONNECTED) 4] get /mygirls lsadasdasd cZxid = 0x800000002 ctime = Wed Jan 04 23:26:09 CST 2017 mZxid = 0x80000000c mtime = Wed Jan 04 23:38:06 CST 2017 pZxid = 0x800000004 cversion = 2 dataVersion = 6 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 10 numChildren = 2 [zk: 192.168.106.81:2181(CONNECTED) 5] |
设置节点内容
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[zk: 192.168.106.81:2181(CONNECTED) 6] ls /mygirls [liuyifei, angelababy] [zk: 192.168.106.81:2181(CONNECTED) 7] set /mygirls/liuyifei aaaaaaa cZxid = 0x800000003 ctime = Wed Jan 04 23:27:56 CST 2017 mZxid = 0x800000010 mtime = Thu Jan 05 00:50:37 CST 2017 pZxid = 0x800000003 cversion = 0 dataVersion = 1 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 7 numChildren = 0 [zk: 192.168.106.81:2181(CONNECTED) 8] get /mygirls/liuyifei aaaaaaa cZxid = 0x800000003 ctime = Wed Jan 04 23:27:56 CST 2017 mZxid = 0x800000010 mtime = Thu Jan 05 00:50:37 CST 2017 pZxid = 0x800000003 cversion = 0 dataVersion = 1 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 7 numChildren = 0 [zk: 192.168.106.81:2181(CONNECTED) 9] |
删除节点
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[zk: 192.168.106.81:2181(CONNECTED) 15] ls /zookeeper [testnode, quota] [zk: 192.168.106.81:2181(CONNECTED) 16] delete /zookeeper/testnode [zk: 192.168.106.81:2181(CONNECTED) 17] ls /zookeeper [quota] [zk: 192.168.106.81:2181(CONNECTED) 18] |
退出客户端的命令：quit
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[zk: 192.168.106.81:2181(CONNECTED) 18] quit Quitting... 2017-01-05 00:58:21,076 [myid:] - INFO [main:ZooKeeper@684] - Session: 0x25969e0732e0001 closed 2017-01-05 00:58:21,076 [myid:] - INFO [main-EventThread:ClientCnxn$EventThread@509] - EventThread shut down [root@hadoop3 bin]# |
8.7 监听znode事件
ls /mygirls watch ## 就对一个节点的子节点变化事件注册了监听
当在82服务器上写ls /mygirls watch的时候，在81上创建一个znode,发现80上的上图出现提醒。
get /mygirls watch ## 就对一个节点的数据内容变化事件注册了监听
开始的时候在80上执行get /mygirls watch，接着在81上执行set /mygirls bbbbbb，执行完成之后，发现在80上的右上角有消息提醒。
注意：监听器只生效一次
监听器的工作机制，其实是在客户端会专门创建一个监听线程，在本机的一个端口上等待zk集群发送过来事件
8.8.telnet连接zookeeper
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telnet 192.168.106.82 2181 成功之后，输入conf，会出现一下内容： clientPort=2181 dataDir=/home/tuzq/software/zookeeper/zkdata/version-2 dataLogDir=/home/tuzq/software/zookeeper/log/version-2 tickTime=2000 maxClientCnxns=60 minSessionTimeout=4000 maxSessionTimeout=40000 serverId=3 initLimit=10 syncLimit=5 electionAlg=3 electionPort=3888 quorumPort=2888 peerType=0 |