zookeeper客户端命令行操作

 

命令基本语法	功能描述
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