Zookeeper（三）详解

Zookeeper客户端命令

1、启动客户端

[atguigu@hadoop103 zookeeper-3.5.7]$ 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、查看当前节点详细数据

[zk: localhost:2181(CONNECTED) 1] ls -s /

5、分别创建2个普通节点

[zk: localhost:2181(CONNECTED) 3] create /sanguo "diaochan"    

6、获得节点的值

[zk: localhost:2181(CONNECTED) 5] get /sanguo    
[zk: localhost:2181(CONNECTED) 6] get -s /sanguo  
[zk: localhost:2181(CONNECTED) 7] get -s /sanguo/shuguo  

7、创建临时节点

[zk: localhost:2181(CONNECTED) 7] create -e /sanguo/wuguo "zhouyu"

  1）在当前客户端是能查看到的

[zk: localhost:2181(CONNECTED) 3] ls /sanguo 

  2）退出当前客户端然后再重启客户端

[zk: localhost:2181(CONNECTED) 12] quit

[atguigu@hadoop104 zookeeper-3.5.7]$ 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 /sanguo

8、创建带序号的节点

  1）先创建一个普通的根节点/sanguo/weiguo

[zk: localhost:2181(CONNECTED) 1] create /sanguo/weiguo "caocao"

  2）创建带序号的节点

[zk: localhost:2181(CONNECTED) 2] create /sanguo/weiguo "caocao"

[zk: localhost:2181(CONNECTED) 3] create -s /sanguo/weiguo

[zk: localhost:2181(CONNECTED) 4] create -s /sanguo/weiguo

[zk: localhost:2181(CONNECTED) 5] create -s /sanguo/weiguo

[zk: localhost:2181(CONNECTED) 6] ls /sanguo

  如果节点下原来没有子节点，序号从0开始依次递增。如果原节点下已有2个节点，则再排序时从2开始，以此类推。

9、修改节点数据值

[zk: localhost:2181(CONNECTED) 6] set /sanguo/weiguo "caopi"

10、节点的值变化监听

  1）在hadoop104主机上注册监听/sanguo节点数据变化

[zk: localhost:2181(CONNECTED) 26] [zk: localhost:2181(CONNECTED) 8] get -w /sanguo  

  2）在hadoop103主机上修改/sanguo节点的数据

[zk: localhost:2181(CONNECTED) 1] set /sanguo "xishi"

  3）观察hadoop104主机收到数据变化的监听

11、节点的子节点变化监听（路径变化）

  1）在hadoop104主机上注册监听/sanguo节点的子节点变化

[zk: localhost:2181(CONNECTED) 1] ls -w /sanguo

  2）在hadoop103主机/sanguo节点上创建子节点

[zk: localhost:2181(CONNECTED) 2] create /sanguo/jin "simayi"

  3）观察hadoop104主机收到子节点变化的监听

12、删除节点

[zk: localhost:2181(CONNECTED) 4] delete /sanguo/jin

13、递归删除节点

[zk: localhost:2181(CONNECTED) 15] deleteall /sanguo/shuguo

14、查看节点状态

[zk: localhost:2181(CONNECTED) 17] stat /sanguo