zookeeper實戰記錄（4）-命令行操作

目錄

Zookeeper實戰記錄-目錄：https://blog.csdn.net/weixin_39565597/article/details/104401912

1、help：顯示所有操作命令

# 幫助信息
[zk: localhost:2181(CONNECTED) 1] help
ZooKeeper -server host:port cmd args
        stat path [watch]
        set path data [version]
        ls path [watch]
        delquota [-n|-b] path
        ls2 path [watch]
        setAcl path acl
        setquota -n|-b val path
        history
        redo cmdno
        printwatches on|off
        delete path [version]
        sync path
        listquota path
        rmr path
        get path [watch]
        create [-s] [-e] path data acl
        addauth scheme auth
        quit
        getAcl path
        close
        connect host:port

2、ls path [watch]：使用 ls 命令來查看當前znode中所包含的內容

# 查詢'/'目錄下所有節點
[zk: localhost:2181(CONNECTED) 1] ls /
[zookeeper]

3、ls2 path [watch]：查看當前節點數據並能看到更新次數等數據

# 查詢'/'目錄下所有節點，且顯示其stat結構信息
[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

4、get path [watch]：獲得節點的值

# 獲取zookeeper節點的信息（數據（第一行）+stat結構體）
[zk: localhost:2181(CONNECTED) 1] get /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、create [-s][-e] path data：普通創建[-s含有序列]、[-e臨時（重啓或者超時消失）]

# 創建hello節點信息，數據爲www.baidu.com
[zk: localhost:2181(CONNECTED) 1] create /hello 'www.baidu.com'
# 查看節點，發現已經創建按成功hello節點
[zk: localhost:2181(CONNECTED) 2] ls /
[hello, zookeeper]
# 獲取hello節點信息
[zk: localhost:2181(CONNECTED) 2] get /hello
www.baidu.com
cZxid = 0x2
ctime = Mon Feb 17 22:08:48 CST 2020
mZxid = 0x2
mtime = Mon Feb 17 22:08:48 CST 2020
pZxid = 0x2
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 13
numChildren = 0

6、set：設置節點的具體值

# 設置節點數據
[zk: localhost:2181(CONNECTED) 1] set /hello 'com.baidu.www'
cZxid = 0x4
ctime = Tue Feb 18 20:55:36 CST 2020
mZxid = 0x9
mtime = Tue Feb 18 21:07:11 CST 2020
pZxid = 0x4
cversion = 0
dataVersion = 4
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 6
numChildren = 0
# 查看節點數據已經修改了
[zk: localhost:2181(CONNECTED) 1] get /hello
com.baidu.www
cZxid = 0x4
ctime = Tue Feb 18 20:55:36 CST 2020
mZxid = 0x9
mtime = Tue Feb 18 21:07:11 CST 2020
pZxid = 0x4
cversion = 0
dataVersion = 4
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 6
numChildren = 0

7、stat：查看節點狀態

# 查看節點的結構體
[zk: localhost:2181(CONNECTED) 1] stat /hello
cZxid = 0x4
ctime = Tue Feb 18 20:55:36 CST 2020
mZxid = 0x9
mtime = Tue Feb 18 21:07:11 CST 2020
pZxid = 0x4
cversion = 0
dataVersion = 4
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 6
numChildren = 0

8、delete：刪除節點

# 刪除節點信息，如果有子節點則不能刪除，必須先刪除其下子節點。
[zk: localhost:2181(CONNECTED) 1] delete /hello
# 刪除成功
[zk: localhost:2181(CONNECTED) 2] ls /
[zookeeper]

9、rmr：遞歸刪除節點

# 刪除節點信息，如果該節點下還有其它節點，則會遞歸刪除。
[zk: localhost:2181(CONNECTED) 1] rmr /hello
WATCHER::

WatchedEvent state:SyncConnected type:NodeDeleted path:/hello
# 刪除成功
[zk: localhost:2181(CONNECTED) 2] ls /
[zookeeper]