ZooKeeper 客户端的使用
2024-09-29 13:35:57
连接zk
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cd bin zkCli.sh -timeout 5000 -server 27.154.242.214:5091 |
输入h,回车查看帮助
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[zk: 27.154.242.214:5091(CONNECTED) 2] h 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 |
创建节点
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[zk: 27.154.242.214:5091(CONNECTED) 11] create /note1 123 Created /note1 |
-s 表示是顺序节点 -e表示为临时节点
创建临时节点
(会话结束节点就被删除,qiut(退出) 然后在登陆 )
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[zk: 27.154.242.214:5091(CONNECTED) 11] create /note2 123 Created /note2 |
顺序节点
(应用场景:分布式的主键生成器)
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[zk: 27.154.242.214:5091(CONNECTED) 1] create -s /note1/note13 1333 Created /note1/note130000000002 [zk: 27.154.242.214:5091(CONNECTED) 2] create -s /note1/note13 1333 Created /note1/note130000000003 |
查看节点状态
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[zk: 27.154.242.214:5091(CONNECTED) 12] stat /note1 cZxid = 0xc0b ctime = Sun Aug 21 07:42:06 CST 2016 mZxid = 0xc0b mtime = Sun Aug 21 07:42:06 CST 2016 pZxid = 0xc0b cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 3 numChildren = 0 |
说明:每一次操作都是一个事务,每一个事务都有一个事务id
2. cZxid 该节点被创建的时候的事务id
3. ctime 节点被创建的时间
4. mZxid 最后一次更新的事务id
5. mtime 最后一次更新的时间
6. pZxid 该节点的子节点最后一次修改的事务id(修改子节点的内容不算)
7. cversion 子节点的版本号
8. dataVersion 数据版本号
9. aclVersion acl权限版本号
10. ephemeralOwner 创建临时节点的事务id(永久节点的话 这个值固定为0)
11. dataLength 当前节点存放数据长度
12. numChinldren 当前节点拥有子节点的个数
获取当前节点存储的数据的内容
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[zk: 27.154.242.214:5091(CONNECTED) 13] get /note1 123 cZxid = 0xc0b ctime = Sun Aug 21 07:42:06 CST 2016 mZxid = 0xc0b mtime = Sun Aug 21 07:42:06 CST 2016 pZxid = 0xc0b cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 3 numChildren = 0 |
ls2列出当前节点的子节点同时输出stat信息
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[zk: 27.154.242.214:5091(CONNECTED) 16] create /note1/note11 456 [zk: 27.154.242.214:5091(CONNECTED) 18] create /note1/note12 789 [zk: 27.154.242.214:5091(CONNECTED) 19] ls2 /note1 [note12, note11] cZxid = 0xc0b ctime = Sun Aug 21 07:42:06 CST 2016 mZxid = 0xc0b mtime = Sun Aug 21 07:42:06 CST 2016 pZxid = 0xc0d cversion = 2 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 3 numChildren = 2 |
修改
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[zk: 27.154.242.214:5091(CONNECTED) 8] set /note1/note11 111 cZxid = 0xc0c ctime = Sun Aug 21 07:47:28 CST 2016 mZxid = 0xc15 mtime = Sun Aug 21 09:12:07 CST 2016 pZxid = 0xc0c cversion = 0 dataVersion = 1 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 3 numChildren = 0 [zk: 27.154.242.214:5091(CONNECTED) 9] get /note1/note11 111 cZxid = 0xc0c ctime = Sun Aug 21 07:47:28 CST 2016 mZxid = 0xc15 mtime = Sun Aug 21 09:12:07 CST 2016 pZxid = 0xc0c cversion = 0 dataVersion = 1 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 3 numChildren = 0 |
再进行修改,dataversion会一直增加上去
删除节点
(rmr 循环删除节点及其子节点)
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[zk: 27.154.242.214:5091(CONNECTED) 10] delete /note1/note11 [zk: 27.154.242.214:5091(CONNECTED) 11] ls /note1 [note12, note130000000002, note130000000003] [zk: 27.154.242.214:5091(CONNECTED) 12] delete /note1 Node not empty: /note1 [zk: 27.154.242.214:5091(CONNECTED) 13] rmr /note1 [zk: 27.154.242.214:5091(CONNECTED) 14] ls / [server, zookeeper, config] |
配额相关的指令
设置配额
[setquota -n|-b val path]
-n限制子节点的个数 –b限制数据的长度
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[zk: 27.154.242.214:5091(CONNECTED) 18] create /note1 123 Created /note1 [zk: 27.154.242.214:5091(CONNECTED) 19] setquota -n 2 /note1 Comment: the parts are option -n val 2 path /note1 [zk: 27.154.242.214:5091(CONNECTED) 20] create /note1/note11 11 Created /note1/note11 [zk: 27.154.242.214:5091(CONNECTED) 21] create /note1/note12 12 Created /note1/note12 [zk: 27.154.242.214:5091(CONNECTED) 22] create /note1/note13 13 Created /note1/note13 |
发现超限了仅仅在日志记录超限信息的警告不会有异常如下:
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[lzmhdev@lzmh01 zookeeper-3.4.8]$ cd bin [lzmhdev@lzmh01 bin]$ ls README.txt zkCleanup.sh zkCli.cmd zkCli.sh zkEnv.cmd zkEnv.sh zkServer.cmd zkServer.sh zookeeper.out [lzmhdev@lzmh01 bin]$ tail -f zookeeper.out at java.lang.Thread.run(Thread.java:745) 2016-08-21 08:54:07,402 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0 /0 .0.0.0:5091:NIOServerCnxn@1008] - Closed socket connection for client /123 .59.54.18:34285 which had sessionid 0x156aa06f8d60001 2016-08-21 08:54:12,000 [myid:] - INFO [SessionTracker:ZooKeeperServer@355] - Expiring session 0x156aa06f8d60001, timeout of 5000ms exceeded 2016-08-21 08:54:12,001 [myid:] - INFO [ProcessThread(sid:0 cport:5091)::PrepRequestProcessor@489] - Processed session termination for sessionid: 0x156aa06f8d60001 2016-08-21 08:54:21,201 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0 /0 .0.0.0:5091:NIOServerCnxnFactory@192] - Accepted socket connection from /123 .59.54.18:34338 2016-08-21 08:54:21,205 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0 /0 .0.0.0:5091:ZooKeeperServer@900] - Client attempting to establish new session at /123 .59.54.18:34338 2016-08-21 08:54:21,223 [myid:] - INFO [SyncThread:0:ZooKeeperServer@645] - Established session 0x156aa06f8d60002 with negotiated timeout 5000 for client /123 .59.54.18:34338 2016-08-21 09:14:54,075 [myid:] - INFO [ProcessThread(sid:0 cport:5091)::PrepRequestProcessor@651] - Got user-level KeeperException when processing sessionid:0x156aa06f8d60002 type :delete cxid:0x15 zxid:0xc17 txntype:-1 reqpath:n /a Error Path: /note1 Error:KeeperErrorCode = Directory not empty for /note1 2016-08-21 10:10:41,080 [myid:] - WARN [SyncThread:0:DataTree@389] - Quota exceeded: /note1 count=3 limit=2 |
查看指定数据节点的配额情况
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[zk: 27.154.242.214:5091(CONNECTED) 23] listquota /note1 absolute path is /zookeeper/quota/note1/zookeeper_limits Output quota for /note1 count=2,bytes=-1 Output stat for /note1 count=4,bytes=9 |
-1 长度没有限制
删除配额
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[zk: 27.154.242.214:5091(CONNECTED) 24] delquota -n /note1 [zk: 27.154.242.214:5091(CONNECTED) 25] listquota /note1 absolute path is /zookeeper/quota/note1/zookeeper_limits Output quota for /note1 count=-1,bytes=-1 Output stat for /note1 count=4,bytes=9 |
查看历史
并重复执行
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[zk: 27.154.242.214:5091(CONNECTED) 26] history 16 - create /note1 17 - setquota -n 2 /note1 18 - create /note1 123 19 - setquota -n 2 /note1 20 - create /note1/note11 11 21 - create /note1/note12 12 22 - create /note1/note13 13 23 - listquota /note1 24 - delquota -n /note1 25 - listquota /note1 26 - history [zk: 27.154.242.214:5091(CONNECTED) 27] redo 25 absolute path is /zookeeper/quota/note1/zookeeper_limits Output quota for /note1 count=-1,bytes=-1 Output stat for /note1 count=4,bytes=9 |
参考
极客学院视频【链接:http://pan.baidu.com/s/1qYKPNyO 密码:nlz3】
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