Zookeeper客户端命令操作--增删查改

简介：本篇博客主要是对Zookeeper的操作，包含了：查看当前节点详细数据、创建普通节点和临时节点、获取节点的值、创建带序号节点、修改节点的数据值、节点值变化监听、节点的子节点变化监听（路径变化）、删除节点等。

• 1、启动客户端
• 2、显示所有操作命令
• 3、查看当前znode所包含的内容
• 4、查看当前节点详细数据
• 5、创建普通节点
• 6、获取节点的值（详细信息）
• 7、创建临时节点
• 8、创建待序号的节点
• 9、修改节点的数据值
• 10、节点的值变化监听
• 11、节点的子节点变化监听（路径变化）
• 12、删除节点
• 13、查看节点状态

[lqs@bdc112 zookeeper-3.5.7]$ bin/zkCli.sh

[zk: localhost:2181(CONNECTED) 0] help
ZooKeeper -server host:port cmd args
	addauth scheme auth
	close 
	config [-c] [-w] [-s]
	connect host:port
	create [-s] [-e] [-c] [-t ttl] path [data] [acl]
	delete [-v version] path
	deleteall path
	delquota [-n|-b] path
	get [-s] [-w] path
	getAcl [-s] path
	history 
	listquota path
	ls [-s] [-w] [-R] path
	ls2 path [watch]
	printwatches on|off
	quit 
	reconfig [-s] [-v version] [[-file path] | [-members serverID=host:port1:port2;port3[,...]*]] | [-add serverId=host:port1:port2;port3[,...]]* [-remove serverId[,...]*]
	redo cmdno
	removewatches path [-c|-d|-a] [-l]
	rmr path
	set [-s] [-v version] path data
	setAcl [-s] [-v version] [-R] path acl
	setquota -n|-b val path
	stat [-w] path
	sync path
Command not found: Command not found help

[zk: localhost:2181(CONNECTED) 1] ls /
[rmstore, yarn-leader-election, zookeeper]

[zk: localhost:2181(CONNECTED) 2] ls -s /
[rmstore, yarn-leader-election, zookeeper]cZxid = 0x0
ctime = Thu Jan 01 08:00:00 CST 1970
mZxid = 0x0
mtime = Thu Jan 01 08:00:00 CST 1970
pZxid = 0x300000011
cversion = 1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 3

[zk: localhost:2181(CONNECTED) 3] create /test "11"
Created /test
[zk: localhost:2181(CONNECTED) 5] create /test2 "22"
Created /test2

[zk: localhost:2181(CONNECTED) 6] get /test
11
[zk: localhost:2181(CONNECTED) 7] get -s /test
11
cZxid = 0x40000000c
ctime = Sat Dec 18 15:09:22 CST 2021
mZxid = 0x40000000c
mtime = Sat Dec 18 15:09:22 CST 2021
pZxid = 0x40000000c
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 2
numChildren = 0

[zk: localhost:2181(CONNECTED) 24] create -e /test/testl
Created /test/testl
#当前临时节点还是存在的
[zk: localhost:2181(CONNECTED) 25] ls /test
test    test2   testl   
[zk: localhost:2181(CONNECTED) 25] quit
#退出客户端再进来，该临时节点就没有
[zk: localhost:2181(CONNECTED) 0] ls /test
[]

#先创建一个节点
[zk: localhost:2181(CONNECTED) 2] ls /test
[]
[zk: localhost:2181(CONNECTED) 3] create /test/test
Created /test/test

#当我们已经创建后，再来创建就不可以了
[zk: localhost:2181(CONNECTED) 4] create /test/test
Node already exists: /test/test

#党史可以创建带序号的节点，且序号的节点编号是自动递增的
[zk: localhost:2181(CONNECTED) 5] create -s /test/test
Created /test/test0000000005
[zk: localhost:2181(CONNECTED) 8] ls /test
[test, test0000000005]
[zk: localhost:2181(CONNECTED) 9] create -s /test/test
Created /test/test0000000006
[zk: localhost:2181(CONNECTED) 10] ls /test
[test, test0000000005, test0000000006]
[zk: localhost:2181(CONNECTED) 11] create -s /test/test
Created /test/test0000000007
[zk: localhost:2181(CONNECTED) 12] ls /test
[test, test0000000005, test0000000006, test0000000007]

#创建节点zhi，并且初始化zhi的值为"123456"
[zk: localhost:2181(CONNECTED) 15] create /test/zhi "123456"
Created /test/zhi

#查看值（获取值）
[zk: localhost:2181(CONNECTED) 16] get /test/zhi
123456

#修改zhi的值为"654321"
[zk: localhost:2181(CONNECTED) 17] set /test/zhi "654321"

#查看修改后的值
[zk: localhost:2181(CONNECTED) 18] get /test/zhi
654321

#在bdc112主机上注册监听/sanguo节点数据变化
[zk: localhost:2181(CONNECTED) 21] get -w /test

#在bdc113主机上修改/sanguo节点的数据
[zk: localhost:2181(CONNECTED) 0] set /test "12"

#观察bdc112主机收到数据变化的监听
[zk: localhost:2181(CONNECTED) 22] 
WATCHER::

WatchedEvent state:SyncConnected type:NodeDataChanged path:/test

#注意，当再次去bdc113修改值是，此bdc112的监听不会有值在出现，因为这里监听只监听一次！

#在bdc112主机上注册监听/sanguo节点的子节点变化
[zk: localhost:2181(CONNECTED) 22] ls -w /test
[test, test0000000005, test0000000006, test0000000007, zhi]

#在bdc113主机/sanguo节点上创建子节点
[zk: localhost:2181(CONNECTED) 0] create /test/jinting "test"
Created /test/jinting

#观察bdc112主机收到子节点变化的监听
[zk: localhost:2181(CONNECTED) 23] 
WATCHER::

WatchedEvent state:SyncConnected type:NodeChildrenChanged path:/test

delete删除子节点

[zk: localhost:2181(CONNECTED) 24] ls /test
[jinting, test, test0000000005, test0000000006, test0000000007, zhi]
 
[zk: localhost:2181(CONNECTED) 25] delete /test/test0000000007
  
[zk: localhost:2181(CONNECTED) 26] ls /test
[jinting, test, test0000000005, test0000000006, zhi]

delete递归删除父节点

[zk: localhost:2181(CONNECTED) 30] ls /
[rmstore, test2, test, yarn-leader-election, zookeeper]
[zk: localhost:2181(CONNECTED) 27] delete /test
Node not empty: /test
[zk: localhost:2181(CONNECTED) 28] deleteall /test
[zk: localhost:2181(CONNECTED) 30] ls /
[rmstore, test2, yarn-leader-election, zookeeper]

还可以用rmr命令删除节点或父节点
但是它会说“The command ‘rmr’ has been deprecated. Please use ‘deleteall’ instead.”，即“命令’rmr’已被弃用。 请使用“deleteall”代替。 ”

[zk: localhost:2181(CONNECTED) 30] ls /
[rmstore, test2, yarn-leader-election, zookeeper]
[zk: localhost:2181(CONNECTED) 31] ls /test2
[]
[zk: localhost:2181(CONNECTED) 32] create /test2/test
Created /test2/test
[zk: localhost:2181(CONNECTED) 33] ls /test2
[test]
[zk: localhost:2181(CONNECTED) 34] rmr /test2
The command 'rmr' has been deprecated. Please use 'deleteall' instead.
[zk: localhost:2181(CONNECTED) 35] ls /
[rmstore, yarn-leader-election, zookeeper]
[zk: localhost:2181(CONNECTED) 36]

[zk: localhost:2181(CONNECTED) 36] stat /rmstore
cZxid = 0x300000011
ctime = Fri Dec 17 23:45:48 CST 2021
mZxid = 0x300000011
mtime = Fri Dec 17 23:45:48 CST 2021
pZxid = 0x300000012
cversion = 1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 1