zookeeper客户端命令行操作
| 命令基本语法 |
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| help |
显示所有操作命令 |
| ls path [watch] |
使用 ls 命令来查看当前znode中所包含的内容 |
| ls2 path [watch] |
查看当前节点数据并能看到更新次数等数据 |
| create |
普通创建 -s 含有序列 -e 临时（重启或者超时消失） |
| get path [watch] |
获得节点的值 |
| set |
设置节点的具体值 |
| stat |
查看节点状态 |
| delete |
删除节点 |
| rmr |
递归删除节点 |
1）启动客户端
[root@hadoop103 zookeeper-3.4.10]$ bin/zkCli.sh
2）显示所有操作命令
[zk: localhost:2181(CONNECTED) 1] help
3）查看当前znode中所包含的内容
[zk: localhost:2181(CONNECTED) 0] ls / [zookeeper]
4）查看当前节点数据并能看到更新次数等数据
[zk: localhost:2181(CONNECTED) 1] ls2 / [zookeeper] cZxid = 0x0 ctime = Thu Jan 01 08:00:00 CST 1970 mZxid = 0x0 mtime = Thu Jan 01 08:00:00 CST 1970 pZxid = 0x0 cversion = -1 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 0 numChildren = 1
5）创建普通节点
[zk: localhost:2181(CONNECTED) 2] create /app1 "hello app1" Created /app1 [zk: localhost:2181(CONNECTED) 4] create /app1/server101 "192.168.1.101" Created /app1/server101
6）获得节点的值
[zk: localhost:2181(CONNECTED) 6] get /app1 hello app1 cZxid = 0x20000000a ctime = Mon Jul 17 16:08:35 CST 2017 mZxid = 0x20000000a mtime = Mon Jul 17 16:08:35 CST 2017 pZxid = 0x20000000b cversion = 1 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 10 numChildren = 1 [zk: localhost:2181(CONNECTED) 8] get /app1/server101 192.168.1.101 cZxid = 0x20000000b ctime = Mon Jul 17 16:11:04 CST 2017 mZxid = 0x20000000b mtime = Mon Jul 17 16:11:04 CST 2017 pZxid = 0x20000000b cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 13 numChildren = 0
7）创建短暂节点
[zk: localhost:2181(CONNECTED) 9] create -e /app-emphemeral 8888
（1）在当前客户端是能查看到的
[zk: localhost:2181(CONNECTED) 10] ls / [app1, app-emphemeral, zookeeper]
（2）退出当前客户端然后再重启启动客户端
[zk: localhost:2181(CONNECTED) 12] quit [root@hadoop104 zookeeper-3.4.10]$ bin/zkCli.sh
（3）再次查看根目录下短暂节点已经删除
[zk: localhost:2181(CONNECTED) 0] ls / [app1, zookeeper]
8）创建带序号的节点
（1）先创建一个普通的根节点app2
[zk: localhost:2181(CONNECTED) 11] create /app2 "app2"
（2）创建带序号的节点
[zk: localhost:2181(CONNECTED) 13] create -s /app2/aa 888 Created /app2/aa0000000000 [zk: localhost:2181(CONNECTED) 14] create -s /app2/bb 888 Created /app2/bb0000000001 [zk: localhost:2181(CONNECTED) 15] create -s /app2/cc 888 Created /app2/cc0000000002 如果原节点下有1个节点，则再排序时从1开始，以此类推。 [zk: localhost:2181(CONNECTED) 16] create -s /app1/aa 888 Created /app1/aa0000000001
9）修改节点数据值
[zk: localhost:2181(CONNECTED) 2] set /app1 999
10）节点的值变化监听
（1）在104主机上注册监听/app1节点数据变化
[zk: localhost:2181(CONNECTED) 26] get /app1 watch
（2）在103主机上修改/app1节点的数据
[zk: localhost:2181(CONNECTED) 5] set /app1 777
（3）观察104主机收到数据变化的监听
WATCHER::
WatchedEvent state:SyncConnected type:NodeDataChanged path:/app1
11）节点的子节点变化监听（路径变化）
（1）在104主机上注册监听/app1节点的子节点变化
[zk: localhost:2181(CONNECTED) 1] ls /app1 watch [aa0000000001, server101]
（2）在103主机/app1节点上创建子节点
[zk: localhost:2181(CONNECTED) 6] create /app1/bb 666 Created /app1/bb
（3）观察104主机收到子节点变化的监听
WATCHER::
WatchedEvent state:SyncConnected type:NodeChildrenChanged path:/app1
12）删除节点
[zk: localhost:2181(CONNECTED) 4] delete /app1/bb
13）递归删除节点
[zk: localhost:2181(CONNECTED) 7] rmr /app2
14）查看节点状态
[zk: localhost:2181(CONNECTED) 12] stat /app1 cZxid = 0x20000000a ctime = Mon Jul 17 16:08:35 CST 2017 mZxid = 0x200000018 mtime = Mon Jul 17 16:54:38 CST 2017 pZxid = 0x20000001c cversion = 4 dataVersion = 2 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 3 numChildren = 2
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