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Zookeeper生產(chǎn)常用命令大全(最新3.8.0版本)-創(chuàng)新互聯(lián)

文章目錄
  • 官方文檔
  • 一、服務(wù)端
  • 二、客戶(hù)端
    • 1、連接客戶(hù)端
    • 2、help
    • 3、create
      • 1>創(chuàng)建持久節(jié)點(diǎn)
      • 2>創(chuàng)建臨時(shí)節(jié)點(diǎn)
      • 3>創(chuàng)建持久有序節(jié)點(diǎn)
      • 4>創(chuàng)建臨時(shí)有序節(jié)點(diǎn)
      • 5>創(chuàng)建ttl節(jié)點(diǎn)
      • 6>創(chuàng)建容器節(jié)點(diǎn)
    • 4、get
    • 5、set
    • 6、ls
    • 7、stat
    • 8、刪除節(jié)點(diǎn)
      • 1>delete
      • 2>deleteall
    • 8、其他命令
  • 二、監(jiān)聽(tīng)器Watcher
    • 1、一次性監(jiān)聽(tīng)器
      • 1>監(jiān)聽(tīng)節(jié)點(diǎn)目錄變化
      • 2>監(jiān)聽(tīng)節(jié)點(diǎn)數(shù)據(jù)變化
    • 2、永久的監(jiān)聽(tīng)器
      • 1>PERSISTENT
      • 2>PERSISTENT_RECURSIVE
    • 3、刪除監(jiān)聽(tīng)器
  • 三、四字監(jiān)控命令

成都創(chuàng)新互聯(lián)公司憑借在網(wǎng)站建設(shè)、網(wǎng)站推廣領(lǐng)域領(lǐng)先的技術(shù)能力和多年的行業(yè)經(jīng)驗(yàn),為客戶(hù)提供超值的營(yíng)銷(xiāo)型網(wǎng)站建設(shè)服務(wù),我們始終認(rèn)為:好的營(yíng)銷(xiāo)型網(wǎng)站就是好的業(yè)務(wù)員。我們已成功為企業(yè)單位、個(gè)人等客戶(hù)提供了成都網(wǎng)站設(shè)計(jì)、網(wǎng)站建設(shè)服務(wù),以良好的商業(yè)信譽(yù),完善的服務(wù)及深厚的技術(shù)力量處于同行領(lǐng)先地位。官方文檔

https://zookeeper.apache.org/doc/r3.8.0/zookeeperCLI.html

在這里插入圖片描述

一、服務(wù)端

zookeeper的shell命令都體現(xiàn)在apache-zookeeper-3.8.0-bin/bin/目錄下:

?  bin ls
README.txt             zkEnv.sh               zkSnapShotToolkit.sh
zkCleanup.sh           zkServer-initialize.sh zkSnapshotComparer.cmd
zkCli.cmd              zkServer.cmd           zkSnapshotComparer.sh
zkCli.sh               zkServer.sh            zkTxnLogToolkit.cmd
zkEnv.cmd              zkSnapShotToolkit.cmd  zkTxnLogToolkit.sh

其中包括:

1>啟動(dòng)zookeeper服務(wù):

  • ./zkServer.sh start

2>查看zookeeper服務(wù)狀態(tài):

  • ./zkServer.sh status

3>停止zookeeper服務(wù):

  • ./zkServer.sh stop

4>重啟zookeeper服務(wù):

  • ./zkServer.sh restart
二、客戶(hù)端 1、連接客戶(hù)端

直接使用sh zkCli.sh命令可以連接到本地的zookeeper服務(wù)(127.0.0.1:2181);如果需要連接到其他地址的zookeeper服務(wù),需要使用以下命令格式:

sh zkCli.sh -server [ip]:[port]

示例命令:

sh zkCli.sh -server 127.0.0.1:2181

也可以不指定IP:Port,而是直接連接到本地的zookeeper(即127.0.0.1:2181)

連接成功后,系統(tǒng)會(huì)輸出 ZooKeeper 的相關(guān)環(huán)境以及配置信息。 可以在開(kāi)啟的會(huì)話(huà)中做一些客戶(hù)端操作 與 zookeeper服務(wù)進(jìn)行交互;

2、help

使用 help命令來(lái)查看幫助

[zk: 127.0.0.1:2181(CONNECTED) 21] help
ZooKeeper -server host:port -client-configuration properties-file cmd args
	addWatch [-m mode] path # optional mode is one of [PERSISTENT, PERSISTENT_RECURSIVE] - default is PERSISTENT_RECURSIVE
	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 [-b batch size]
	delquota [-n|-b|-N|-B] path
	get [-s] [-w] path
	getAcl [-s] path
	getAllChildrenNumber path
	getEphemerals path
	history 
	listquota path
	ls [-s] [-w] [-R] path
	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]
	set [-s] [-v version] path data
	setAcl [-s] [-v version] [-R] path acl
	setquota -n|-b|-N|-B val path
	stat [-w] path
	sync path
	version 
	whoami 
Command not found: Command not found help

在這里插入圖片描述

3、create

create命令:創(chuàng)建節(jié)點(diǎn),默認(rèn)持久節(jié)點(diǎn)

create [-s] [-e] [-c] [-t ttl] path [data] [acl]
  • -s:有序節(jié)點(diǎn)
  • -e:臨時(shí)節(jié)點(diǎn),不加默認(rèn)是持久節(jié)點(diǎn)
  • -t ttl:帶過(guò)期時(shí)間節(jié)點(diǎn),單位:秒,比如:create ‐t 10 /node_ttl,/node_ttl節(jié)點(diǎn)在10s后將過(guò)期被刪除。
  • -c:容器節(jié)點(diǎn),當(dāng)容器中的最后一個(gè)子級(jí)被刪除時(shí),容器將被刪除;

Zookeeper原生命令不支持級(jí)聯(lián)創(chuàng)建節(jié)點(diǎn)樹(shù)目錄,需要一級(jí)一級(jí)的創(chuàng)建;curator客戶(hù)端封裝了級(jí)聯(lián)創(chuàng)建的API。

Znode節(jié)點(diǎn)類(lèi)型有四種:

  • 持久的(persistent)
  • 臨時(shí)的(ephemeral)
  • 持久有序的(persistent_sequential)
  • 臨時(shí)有序的(ephemeral_sequential)
1>創(chuàng)建持久節(jié)點(diǎn)
[zk: 127.0.0.1:2181(CONNECTED) 0] create /node_p1
Created /node_p1
2>創(chuàng)建臨時(shí)節(jié)點(diǎn)
[zk: 127.0.0.1:2181(CONNECTED) 1] create -e /node_e1 "node value"
Created /node_e1
3>創(chuàng)建持久有序節(jié)點(diǎn)

持久有序節(jié)點(diǎn):設(shè)置的節(jié)點(diǎn)路徑會(huì)被重命名為序列數(shù),不設(shè)置節(jié)點(diǎn)前綴時(shí),序列數(shù)從0000000000開(kāi)始遞增;

  • 某一個(gè)節(jié)點(diǎn)路徑下的序列數(shù)一直遞增,無(wú)論一直帶前綴、偶爾帶前綴、或一直不帶前綴;

不設(shè)置節(jié)點(diǎn)前綴時(shí):

[zk: 127.0.0.1:2181(CONNECTED) 5] create /node_p2
Created /node_p2
[zk: 127.0.0.1:2181(CONNECTED) 6] create -s /node_p2/
Created /node_p2/0000000000
[zk: 127.0.0.1:2181(CONNECTED) 7] create -s /node_p2/
Created /node_p2/0000000001

設(shè)置節(jié)點(diǎn)前綴時(shí):

[zk: 127.0.0.1:2181(CONNECTED) 12] create -s /node_p2/seq_
Created /node_p2/seq_0000000002
[zk: 127.0.0.1:2181(CONNECTED) 13] create -s /node_p2/seq_
Created /node_p2/seq_0000000003
4>創(chuàng)建臨時(shí)有序節(jié)點(diǎn)

設(shè)置節(jié)點(diǎn)前綴時(shí):

[zk: 127.0.0.1:2181(CONNECTED) 14] create -s -e /node_p2/e_
Created /node_p2/e_0000000004
[zk: 127.0.0.1:2181(CONNECTED) 15] create -s -e /node_p2/e_
Created /node_p2/e_0000000005

不設(shè)置節(jié)點(diǎn)前綴時(shí):

[zk: 127.0.0.1:2181(CONNECTED) 16] create -s -e /node_p2/
Created /node_p2/0000000006
[zk: 127.0.0.1:2181(CONNECTED) 17] create -s -e /node_p2/
Created /node_p2/0000000007
5>創(chuàng)建ttl節(jié)點(diǎn)

默認(rèn)禁用,需要在 zoo.cfg中添加 extendedTypesEnabled=true 開(kāi)啟。 否者報(bào)如下錯(cuò):

[zk: 127.0.0.1:2181(CONNECTED) 18] create -t 10 /node_ttl "ttl node value"
KeeperErrorCode = Unimplemented for /node_ttl

開(kāi)啟ttl之后:

[zk: 127.0.0.1:2181(CONNECTED) 8] create -t 10 /node_ttl "ttl node value"
Created /node_ttl
[zk: 127.0.0.1:2181(CONNECTED) 9] get /node_ttl
ttl node value
[zk: 127.0.0.1:2181(CONNECTED) 10] get /node_ttl
Node does not exist: /node_ttl
  • /node_ttl,10s之后過(guò)期

注意:ttl不能用于臨時(shí)節(jié)點(diǎn) 。

6>創(chuàng)建容器節(jié)點(diǎn)
[zk: 127.0.0.1:2181(CONNECTED) 0] create -c /container_node mydata
Created /container_node
[zk: 127.0.0.1:2181(CONNECTED) 1] create -c /container_node/child_1 mydata
Created /container_node/child_1
[zk: 127.0.0.1:2181(CONNECTED) 2] create -c /container_node/child_2 mydata
Created /container_node/child_2
[zk: 127.0.0.1:2181(CONNECTED) 3] delete /container_node/child_1
[zk: 127.0.0.1:2181(CONNECTED) 4] delete /container_node/child_2
[zk: 127.0.0.1:2181(CONNECTED) 5] get /container_node
mydata
[zk: 127.0.0.1:2181(CONNECTED) 6] get /container_node
mydata
[zk: 127.0.0.1:2181(CONNECTED) 7] get /container_node
mydata
[zk: 127.0.0.1:2181(CONNECTED) 8] get /container_node
Node does not exist: /container_node

從測(cè)試結(jié)果來(lái)看,容器節(jié)點(diǎn)的最后一個(gè)子級(jí)被刪除之后,過(guò)了幾秒,容器節(jié)點(diǎn)才被刪除。

4、get

get命令:獲取節(jié)點(diǎn)/文件內(nèi)容

get [-s] [-w] path
  • -s:查看節(jié)點(diǎn)數(shù)據(jù)以及節(jié)點(diǎn)狀態(tài)信息
  • -w:添加一個(gè)watch,節(jié)點(diǎn)數(shù)據(jù)變更時(shí),會(huì)通知客戶(hù)端(通知是一次性的)。
[zk: 127.0.0.1:2181(CONNECTED) 12] create /node_test "testNode value"
Created /node_test
[zk: 127.0.0.1:2181(CONNECTED) 13] get /node_test
testNode value

-s 選項(xiàng)在獲取到節(jié)點(diǎn)值的同時(shí),會(huì)帶出節(jié)點(diǎn)的狀態(tài)stat:

[zk: 127.0.0.1:2181(CONNECTED) 14] get -s /node_test
testNode value
cZxid = 0x14 # 數(shù)據(jù)節(jié)點(diǎn)創(chuàng)建時(shí)的事務(wù)ID
ctime = Wed Nov 30 15:09:39 CST 2022 # 數(shù)據(jù)節(jié)點(diǎn)創(chuàng)建時(shí)的時(shí)間
mZxid = 0x18 # 數(shù)據(jù)節(jié)點(diǎn)最后一次更新時(shí)的事務(wù)ID
mtime = Wed Nov 30 15:14:25 CST 2022 # 數(shù)據(jù)節(jié)點(diǎn)最后一次更新時(shí)的時(shí)間
pZxid = 0x14 # 數(shù)據(jù)節(jié)點(diǎn)的子節(jié)點(diǎn)最后一次被修改時(shí)的事務(wù)ID
cversion = 0 # 子節(jié)點(diǎn)的更改次數(shù)
dataVersion = 3 # 節(jié)點(diǎn)數(shù)據(jù)的更改次數(shù)
aclVersion = 0 # 節(jié)點(diǎn)的ACL的更改次數(shù)
ephemeralOwner = 0x0 # 如果節(jié)點(diǎn)是臨時(shí)節(jié)點(diǎn),則表示創(chuàng)建該節(jié)點(diǎn)的會(huì)話(huà)的SessionID,如果節(jié)點(diǎn)是持久節(jié)點(diǎn),則該屬性值為0.
dataLength = 24 # 數(shù)據(jù)內(nèi)容的長(zhǎng)度
numChildren = 0 # 數(shù)據(jù)節(jié)點(diǎn)當(dāng)前的子節(jié)點(diǎn)個(gè)數(shù)
5、set

set命令:修改節(jié)點(diǎn)內(nèi)容;每次修改成功后,版本號(hào)會(huì)自動(dòng)+1,初始為0

set [-s] [-v version] path data
  • -s:更新節(jié)點(diǎn)數(shù)據(jù)并顯示節(jié)點(diǎn)狀態(tài)信息
  • -v:指定數(shù)據(jù)版本號(hào),如果指定的數(shù)據(jù)版本號(hào)和數(shù)據(jù)當(dāng)前版本號(hào)不一致,則更新失?。梢岳斫鉃闃?lè)觀鎖的概念)。
[zk: 127.0.0.1:2181(CONNECTED) 15] set /node_test "updated tesetNode value"

-s選項(xiàng),更新節(jié)點(diǎn)數(shù)據(jù)并顯示節(jié)點(diǎn)狀態(tài)信息

[zk: 127.0.0.1:2181(CONNECTED) 16] set -s /node_test "updated tesetNode value2"
cZxid = 0x14
ctime = Wed Nov 30 15:09:39 CST 2022
mZxid = 0x16
mtime = Wed Nov 30 15:13:40 CST 2022
pZxid = 0x14
cversion = 0
dataVersion = 2
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 24
numChildren = 0

-v選項(xiàng),指定數(shù)據(jù)版本號(hào),如果指定的數(shù)據(jù)版本號(hào)和數(shù)據(jù)當(dāng)前版本號(hào)不一致,則更新失敗(可以理解為樂(lè)觀鎖方式更新);

[zk: 127.0.0.1:2181(CONNECTED) 17] set -v 3 /node_test "updated tesetNode value3"
version No is not valid : /node_test
[zk: 127.0.0.1:2181(CONNECTED) 18] set -s -v 2 /node_test "updated tesetNode value3"
cZxid = 0x14
ctime = Wed Nov 30 15:09:39 CST 2022
mZxid = 0x18
mtime = Wed Nov 30 15:14:25 CST 2022
pZxid = 0x14
cversion = 0
dataVersion = 3
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 24
numChildren = 0
  • 在 -s選項(xiàng)操作后,/node_test的version為2,在-v選項(xiàng)更新時(shí),必須執(zhí)行version為2才能完成更新操作。
6、ls

ls命令:查看目錄下的節(jié)點(diǎn)信息

ls [-s] [-w] [-R] path
  • -s:顯示節(jié)點(diǎn)詳情,包括狀態(tài)信息
  • -w:添加一個(gè)watch監(jiān)視器
  • -R:列舉出節(jié)點(diǎn)的級(jí)聯(lián)節(jié)點(diǎn)
  • path:顯示某目錄下節(jié)點(diǎn)/文件
[zk: 127.0.0.1:2181(CONNECTED) 19] create /node_test/sub_node1 "1"
Created /node_test/sub_node1
[zk: 127.0.0.1:2181(CONNECTED) 20] create /node_test/sub_node2 "2"
Created /node_test/sub_node2
[zk: 127.0.0.1:2181(CONNECTED) 21] ls /node_test
[sub_node1, sub_node2]
[zk: 127.0.0.1:2181(CONNECTED) 22] ls -s /node_test
[sub_node1, sub_node2]
cZxid = 0x14
ctime = Wed Nov 30 15:09:39 CST 2022
mZxid = 0x18
mtime = Wed Nov 30 15:14:25 CST 2022
pZxid = 0x1a
cversion = 2
dataVersion = 3
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 24
numChildren = 2
[zk: 127.0.0.1:2181(CONNECTED) 23] ls -R /node_test
/node_test
/node_test/sub_node1
/node_test/sub_node2
[zk: 127.0.0.1:2181(CONNECTED) 24]
7、stat

stat命令:查看節(jié)點(diǎn)狀態(tài)。

stat [-w] path
  • -w:添加watch
  • path:查看某目錄下節(jié)點(diǎn)的狀態(tài)
[zk: 127.0.0.1:2181(CONNECTED) 24] stat /node_test
cZxid = 0x14
ctime = Wed Nov 30 15:09:39 CST 2022
mZxid = 0x18
mtime = Wed Nov 30 15:14:25 CST 2022
pZxid = 0x1a
cversion = 2
dataVersion = 3
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 24
numChildren = 2
8、刪除節(jié)點(diǎn)

delete命令只能刪除沒(méi)有子節(jié)點(diǎn)的節(jié)點(diǎn);deleteall命令可以級(jí)聯(lián)刪除當(dāng)前節(jié)點(diǎn)和子節(jié)點(diǎn);

1>delete

delete命令:只能刪除沒(méi)有子節(jié)點(diǎn)的節(jié)點(diǎn)。如果其有子節(jié)點(diǎn)時(shí),無(wú)法刪除

delete [-v version] path
  • -v:指定數(shù)據(jù)版本號(hào),如果指定的數(shù)據(jù)版本號(hào)和數(shù)據(jù)當(dāng)前版本號(hào)不一致,則刪除失??;
[zk: 127.0.0.1:2181(CONNECTED) 25] delete /node_test/sub_node1
[zk: 127.0.0.1:2181(CONNECTED) 26] ls -R /node_test
/node_test
/node_test/sub_node2
2>deleteall

deleteall命令:級(jí)聯(lián)刪除該節(jié)點(diǎn)和子節(jié)點(diǎn)。

deleteall path
[zk: 127.0.0.1:2181(CONNECTED) 27] deleteall /node_test
[zk: 127.0.0.1:2181(CONNECTED) 28] ls -R /node_test
Node does not exist: /node_test
[zk: 127.0.0.1:2181(CONNECTED) 29] ls /node_test/sub_node2
Node does not exist: /node_test/sub_node2
8、其他命令
  • getAllChildrenNumber:獲取節(jié)點(diǎn)下的所有子孫節(jié)點(diǎn)數(shù)量
  • getEphemerals:獲取當(dāng)前客戶(hù)端創(chuàng)建的所有臨時(shí)節(jié)點(diǎn)
  • history:顯示最近執(zhí)行的11條命令的歷史記錄
二、監(jiān)聽(tīng)器Watcher

Watcher(事件監(jiān)聽(tīng)器)允許用戶(hù)在指定節(jié)點(diǎn)上注冊(cè) Watcher,在特定事件發(fā)生時(shí),Watcher會(huì)被觸發(fā);Zookeeper服務(wù)端將事件通知到響應(yīng)的客戶(hù)端上去;

該機(jī)制是Zookeeper實(shí)現(xiàn)分布式協(xié)調(diào)服務(wù)的重要特性。

  • 客戶(hù)端監(jiān)聽(tīng)節(jié)點(diǎn)的變化,當(dāng)節(jié)點(diǎn)發(fā)生改變時(shí),觸發(fā)相應(yīng)的事件;
  • 當(dāng)事件被觸發(fā)時(shí),客戶(hù)端會(huì)收到一個(gè)數(shù)據(jù)包,說(shuō)明節(jié)點(diǎn)已經(jīng)改變。
1、一次性監(jiān)聽(tīng)器 1>監(jiān)聽(tīng)節(jié)點(diǎn)目錄變化

監(jiān)聽(tīng)節(jié)點(diǎn)的子節(jié)點(diǎn)變化,當(dāng)子節(jié)點(diǎn)發(fā)生改變時(shí)觸發(fā);

ls -w path

Session1:

# 創(chuàng)建節(jié)點(diǎn)
[zk: 127.0.0.1:2181(CONNECTED) 31] create /watch_node
Created /watch_node
# 監(jiān)聽(tīng)節(jié)點(diǎn)目錄變化
[zk: 127.0.0.1:2181(CONNECTED) 32] ls -w /watch_node
[]

Session2:

# 創(chuàng)建/watch_node節(jié)點(diǎn)的子節(jié)點(diǎn)
[zk: 127.0.0.1:2181(CONNECTED) 0] create /watch_node/node1 "node1 value"
Created /watch_node/node1
[zk: 127.0.0.1:2181(CONNECTED) 1] create /watch_node/node2 "node2 value"
Created /watch_node/node2

當(dāng)/watch_node節(jié)點(diǎn)的子節(jié)點(diǎn)第一次發(fā)生變化時(shí),會(huì)觸發(fā)session1的Watcher,觸發(fā)后會(huì)被刪除,無(wú)法再次觸發(fā)。

[zk: 127.0.0.1:2181(CONNECTED) 33] 
WATCHER::

WatchedEvent state:SyncConnected type:NodeChildrenChanged path:/watch_node

圖示:

在這里插入圖片描述

2>監(jiān)聽(tīng)節(jié)點(diǎn)數(shù)據(jù)變化

當(dāng)該節(jié)點(diǎn)數(shù)據(jù)發(fā)生改變時(shí)觸發(fā),但子節(jié)點(diǎn)的數(shù)據(jù)變化不會(huì)觸發(fā)。一次性監(jiān)聽(tīng),觸發(fā)后會(huì)被刪除,無(wú)法再次觸發(fā)。

get -w path

Session1:

[zk: 127.0.0.1:2181(CONNECTED) 33] get -w /watch_node
null

Session2:

[zk: 127.0.0.1:2181(CONNECTED) 3] set /watch_node "hahaha"

當(dāng)/watch_node節(jié)點(diǎn)的數(shù)據(jù)第一次發(fā)生變化時(shí),會(huì)觸發(fā)session1的Watcher,觸發(fā)后會(huì)被刪除,無(wú)法再次觸發(fā)。

[zk: 127.0.0.1:2181(CONNECTED) 34] 
WATCHER::

WatchedEvent state:SyncConnected type:NodeDataChanged path:/watch_node

圖示:

在這里插入圖片描述

2、永久的監(jiān)聽(tīng)器

在 Zookeeper 3.6.0版本之后,客戶(hù)端可以在節(jié)點(diǎn)上創(chuàng)建永久監(jiān)聽(tīng),永久監(jiān)聽(tīng)在被觸發(fā)后不會(huì)被刪除。

addWatch [-m mode] path

永久監(jiān)聽(tīng)器在創(chuàng)建時(shí)可以通過(guò) -m 選項(xiàng)指定模式,有兩種模式:

  • PERSISTENT:節(jié)點(diǎn)的數(shù)據(jù)變化以及子節(jié)點(diǎn)的變化會(huì)觸發(fā)相應(yīng)事件,子節(jié)點(diǎn)的數(shù)據(jù)變化不會(huì)觸發(fā)。
  • PERSISTENT_RECURSIVE(默認(rèn)模式,不指定時(shí)使用):節(jié)點(diǎn)的數(shù)據(jù)變化以及所有子孫節(jié)點(diǎn)的目錄或者數(shù)據(jù)變化都會(huì)觸發(fā)相應(yīng)事件。
1>PERSISTENT

PERSISTENT:該節(jié)點(diǎn)的數(shù)據(jù)變化以及子節(jié)點(diǎn)的變化會(huì)觸發(fā)相應(yīng)事件,子節(jié)點(diǎn)的數(shù)據(jù)變化不會(huì)觸發(fā)。

# 1、增加PERSISTENT模式的監(jiān)聽(tīng)器
[zk: 127.0.0.1:2181(CONNECTED) 34] addWatch -m PERSISTENT /watch_node
# 2、節(jié)點(diǎn)數(shù)據(jù)發(fā)生變更時(shí),觸發(fā)監(jiān)聽(tīng)器
[zk: 127.0.0.1:2181(CONNECTED) 35] set /watch_node "node12321"

WATCHER::

WatchedEvent state:SyncConnected type:NodeDataChanged path:/watch_node
# 3、節(jié)點(diǎn)的子節(jié)點(diǎn)新增時(shí),觸發(fā)監(jiān)聽(tīng)器
[zk: 127.0.0.1:2181(CONNECTED) 36] create /watch_node/node4 "node4"

WATCHER::Created /watch_node/node4


WatchedEvent state:SyncConnected type:NodeChildrenChanged path:/watch_node
# 4、節(jié)點(diǎn)的子節(jié)點(diǎn)數(shù)據(jù)發(fā)生變化時(shí),不會(huì)觸發(fā)監(jiān)聽(tīng)器
[zk: 127.0.0.1:2181(CONNECTED) 37] set /watch_node/node4 "node4-2"
# 5、節(jié)點(diǎn)的子節(jié)點(diǎn)刪除時(shí),觸發(fā)監(jiān)聽(tīng)器
[zk: 127.0.0.1:2181(CONNECTED) 38] delete /watch_node/node4

WATCHER::

WatchedEvent state:SyncConnected type:NodeChildrenChanged path:/watch_node
2>PERSISTENT_RECURSIVE

PERSISTENT_RECURSIVE:節(jié)點(diǎn)的數(shù)據(jù)變化以及所有子孫節(jié)點(diǎn)的目錄或者數(shù)據(jù)變化都會(huì)觸發(fā)相應(yīng)事件。

# 創(chuàng)建一個(gè)節(jié)點(diǎn)
[zk: 127.0.0.1:2181(CONNECTED) 40] create /watch_node2
Created /watch_node2
# 1、針對(duì)節(jié)點(diǎn)增加PERSISTENT_RECURSIVE模式的監(jiān)聽(tīng)器
[zk: 127.0.0.1:2181(CONNECTED) 41] addWatch -m PERSISTENT_RECURSIVE /watch_node2
# 2、節(jié)點(diǎn)數(shù)據(jù)發(fā)生變更時(shí),觸發(fā)監(jiān)聽(tīng)器
[zk: 127.0.0.1:2181(CONNECTED) 42] set /watch_node2 "hahahah"

WATCHER::

WatchedEvent state:SyncConnected type:NodeDataChanged path:/watch_node2
# 3、節(jié)點(diǎn)的子節(jié)點(diǎn)新增時(shí),觸發(fā)監(jiān)聽(tīng)器
[zk: 127.0.0.1:2181(CONNECTED) 43] create /watch_node2/node1

WATCHER::Created /watch_node2/node1


WatchedEvent state:SyncConnected type:NodeCreated path:/watch_node2/node1
# 4、節(jié)點(diǎn)的子節(jié)點(diǎn)數(shù)據(jù)發(fā)生變化時(shí),觸發(fā)監(jiān)聽(tīng)器
[zk: 127.0.0.1:2181(CONNECTED) 44] set /watch_node2/node1 "node1"

WATCHER::

WatchedEvent state:SyncConnected type:NodeDataChanged path:/watch_node2/node1
# 5、節(jié)點(diǎn)的子節(jié)點(diǎn)刪除時(shí),觸發(fā)監(jiān)聽(tīng)器
[zk: 127.0.0.1:2181(CONNECTED) 45] delete /watch_node2/node1

WATCHER::

WatchedEvent state:SyncConnected type:NodeDeleted path:/watch_node2/node1
3、刪除監(jiān)聽(tīng)器

刪除某個(gè)節(jié)點(diǎn)的監(jiān)聽(tīng)器,刪除后節(jié)點(diǎn)相應(yīng)的變更事件不會(huì)再觸發(fā)監(jiān)聽(tīng)器

removewatches path
[zk: 127.0.0.1:2181(CONNECTED) 48] removewatches  /watch_node2

WATCHER::

WatchedEvent state:SyncConnected type:PersistentWatchRemoved path:/watch_node2
三、四字監(jiān)控命令

見(jiàn)博文:https://saint.blog.csdn.net/article/details/128115252

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