ZooKeeper快速入门系列(5) | Zookeeper常用的shell操作
2021-09-02 20:53:45

  此篇的操作都是在上篇的基础上进行的。

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下 表 为 客 户 端 常 用 的 s h e l l 操 作 color{#FF0000}{下表为客户端常用的shell操作} 下表为客户端常用的shell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
create	-s 含有序列
create	-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

[bigdata@hadoop002 zookeeper-3.4.10]$ bin/zkCli.sh

2. 显示所有操作

[zk: localhost:2181(CONNECTED) 1] help

3. 查看当前znode中所包含的内容

[zk: localhost:2181(CONNECTED) 2] ls /

4. 查看当前节点详细数据

[zk: localhost:2181(CONNECTED) 3] ls2 /

5. 分别创建2个普通节点

[zk: localhost:2181(CONNECTED) 6] create /sanguo "jinlian" Created /sanguo
Node already exists: /sanguo
[zk: localhost:2181(CONNECTED) 7] create /sanguo/shuguo "liubei"          
Created /sanguo/shuguo

6. 获取节点的值

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

[zk: localhost:2181(CONNECTED) 9] get /sanguo/shuguo

7. 创建短暂节点

[zk: localhost:2181(CONNECTED) 10] create -e /sanguo/wuguo "zhouyu"
Created /sanguo/wuguo

• 1. 在当前客户端时能查看到的

[zk: localhost:2181(CONNECTED) 11] ls /sanguo 
[wuguo, shuguo]

• 2. 退出当前客户端然后再重启客户端

[zk: localhost:2181(CONNECTED) 12] quit
[bigdata@hadoop002 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 /sanguo
[shuguo]

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"
Created /sanguo/weiguo

• 2. 创建带序号的节点
  
    如果原来没有序号节点，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) 5] set /sanguo/weiguo "simayi"

10. 节点的值变化监听

• 1. 在hadoop004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 /sanguo watch

• 2. 在hadoop003主机上修改/sanguo节点的数据

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

• 3. 观察hadoop004主机收到数据变化的监听

WATCHER::
WatchedEvent state:SyncConnected type:NodeDataChanged path:/sanguo

• 4. 图解
  

11. 节点的子节点变化监听(路径变化)

• 1. 在hadoop004主机上注册监听/sanguo节点的子节点变化

[zk: localhost:2181(CONNECTED) 1] ls /sanguo watch
[shuguo, weiguo]

• 2. 在hadoop003主机/sanguo节点上创建子节点

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

• 3. 观察hadoop004主机收到子节点变化的监听

WATCHER::
WatchedEvent state:SyncConnected type:NodeChildrenChanged path:/sanguo

• 4. 图解

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] rmr /sanguo/shuguo

14. 查看节点状态

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

本篇博客就到这里了,下一篇博客博主将为大家带来Zookeeper的API操作,敬请期待!!!

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