ZooKeeper快速入門系列(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礎(chǔ)上進行的。

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下 表 為 客 戶 端 常 用 的 s h e l l 操 作 color{#FF0000}{下表為客戶端常用的shell操作} 下表為客戶端常用的shell操作

命令基本語法	功能描述
help	顯示所有操作命令
ls path [watch]	使用 ls 命令來查看當前znode中所包含的內(nèi)容
ls2 path [watch]	查看當前節(jié)點數(shù)據(jù)并能看到更新次數(shù)等數(shù)據(jù)
create	普通創(chuàng)建
create	-s 含有序列
create	-e 臨時（重啟或者超時消失）
get path [watch]	獲得節(jié)點的值
set	設(shè)置節(jié)點的具體值
stat	查看節(jié)點狀態(tài)
delete	刪除節(jié)點
rmr	遞歸刪除節(jié)點

1. 啟動客戶端

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

2. 顯示所有操作

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

3. 查看當前znode中所包含的內(nèi)容

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

4. 查看當前節(jié)點詳細數(shù)據(jù)

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

5. 分別創(chuàng)建2個普通節(jié)點

[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. 獲取節(jié)點的值

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

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

7. 創(chuàng)建短暫節(jié)點

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

• 1. 在當前客戶端時能查看到的

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

• 2. 退出當前客戶端然后再重啟客戶端

[zk: localhost:2181(CONNECTED) 12] quit
[bigdata@hadoop002 zookeeper-3.4.10]$ bin/zkCli.sh

• 3. 再次查看根目錄下短暫節(jié)點已經(jīng)刪除

[zk: localhost:2181(CONNECTED) 0] ls /sanguo
[shuguo]

8. 創(chuàng)建帶序號的節(jié)點

• 1.先創(chuàng)建一個普通的根節(jié)點/sanguo/weiguo

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

• 2. 創(chuàng)建帶序號的節(jié)點
  
  ??如果原來沒有序號節(jié)點，序號從0開始依次遞增。如果原節(jié)點下已有2個節(jié)點，則再排序時從2開始，以此類推。
  
  

9. 修改節(jié)點數(shù)據(jù)值

[zk: localhost:2181(CONNECTED) 5] set /sanguo/weiguo "simayi"

10. 節(jié)點的值變化監(jiān)聽

• 1. 在hadoop004主機上注冊監(jiān)聽/sanguo節(jié)點數(shù)據(jù)變化

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

• 2. 在hadoop003主機上修改/sanguo節(jié)點的數(shù)據(jù)

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

• 3. 觀察hadoop004主機收到數(shù)據(jù)變化的監(jiān)聽

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

• 4. 圖解
  

11. 節(jié)點的子節(jié)點變化監(jiān)聽(路徑變化)

• 1. 在hadoop004主機上注冊監(jiān)聽/sanguo節(jié)點的子節(jié)點變化

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

• 2. 在hadoop003主機/sanguo節(jié)點上創(chuàng)建子節(jié)點

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

• 3. 觀察hadoop004主機收到子節(jié)點變化的監(jiān)聽

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

• 4. 圖解

12. 刪除節(jié)點

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

13. 遞歸刪除節(jié)點

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

14. 查看節(jié)點狀態(tài)

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

本篇博客就到這里了,下一篇博客博主將為大家?guī)鞿ookeeper的API操作,敬請期待!!!

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