Hadoop基礎（三十四）：Zookeeper 客戶端命令列操作

阿新 • • 發佈：2020-07-21

客戶端命令列操作

1．啟動客戶端

[atguigu@hadoop103 zookeeper-3.4.10]$ bin/zkCli.sh

2．顯示所有操作命令

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

3．檢視當前 znode 中所包含的內容

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

4．檢視當前節點詳細資料

[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．分別建立 2 個普通節點

[zk: localhost:2181(CONNECTED) 3] create /sanguo "jinlian"
Created /sanguo
[zk: localhost:2181(CONNECTED) 4] create /sanguo/shuguo 
"liubei"
Created  
/sanguo/shuguo

6．獲得節點的值

[zk: localhost:2181(CONNECTED) 5] get /sanguo
jinlian
cZxid = 0x100000003
ctime = Wed Aug 29 00:03:23 CST 2018
mZxid = 0x100000003
mtime = Wed Aug 29 00:03:23 CST 2018
pZxid = 0x100000004
cversion = 1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 7
numChildren = 1
[zk: localhost:2181(CONNECTED) 6 
]
[zk: localhost:2181(CONNECTED) 6] get /sanguo/shuguo
liubei
cZxid = 0x100000004
ctime = Wed Aug 29 00:04:35 CST 2018
mZxid = 0x100000004
mtime = Wed Aug 29 00:04:35 CST 2018
pZxid = 0x100000004
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 6
numChildren = 0

7．建立短暫節點

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

（1）在當前客戶端是能檢視到的

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

（2）退出當前客戶端然後再重啟客戶端

[zk: localhost:2181(CONNECTED) 12] quit
[atguigu@hadoop104 zookeeper-3.4.10]$ bin/zkCli.sh

（3）再次檢視根目錄下短暫節點已經刪除

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

[shuguo] 8．建立帶序號的節點（1）先建立一個普通的根節點/sanguo/weiguo

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

（2）建立帶序號的節點

[zk: localhost:2181(CONNECTED) 2] create -s 
/sanguo/weiguo/xiaoqiao "jinlian"
Created /sanguo/weiguo/xiaoqiao0000000000
[zk: localhost:2181(CONNECTED) 3] create -s 
/sanguo/weiguo/daqiao "jinlian"
Created /sanguo/weiguo/daqiao0000000001
[zk: localhost:2181(CONNECTED) 4] create -s 
/sanguo/weiguo/diaocan "jinlian"
Created /sanguo/weiguo/diaocan0000000002

如果原來沒有序號節點，序號從 0 開始依次遞增。如果原節點下已有 2 個節點，則再排序時從 2 開始，以此類推。 9．修改節點資料值

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

10．節點的值變化監聽（1）在 hadoop104 主機上註冊監聽/sanguo 節點資料變化

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

（2）在 hadoop103 主機上修改/sanguo 節點的資料

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

（3）觀察 hadoop104 主機收到資料變化的監聽

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

11．節點的子節點變化監聽（路徑變化）（1）在 hadoop104 主機上註冊監聽/sanguo 節點的子節點變化

[zk: localhost:2181(CONNECTED) 1] ls /sanguo watch
[aa0000000001, server101]

（2）在 hadoop103 主機/sanguo 節點上建立子節點

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

（3）觀察 hadoop104 主機收到子節點變化的監聽

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

12．刪除節點

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

13．遞迴刪除節點

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

14．檢視節點狀態

[zk: localhost:2181(CONNECTED) 17] stat /sanguo
cZxid = 0x100000003
ctime = Wed Aug 29 00:03:23 CST 2018
mZxid = 0x100000011
mtime = Wed Aug 29 00:21:23 CST 2018
pZxid = 0x100000014
cversion = 9
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 4
numChildren = 1