玉器网站模版,英文网站设计,网站策划表,传奇新服网Zookeeper的shell操作
本章节将分享一些zookeeper客服端的一些命令#xff0c;实验操作有助于理解zookeeper的数据结构。
Zookeeper命令工具
在前一章的基础上#xff0c;在启动Zookeeper服务之后#xff0c;输入以下命令#xff0c;连接到Zookeeper服务。连接成功之后实验操作有助于理解zookeeper的数据结构。
Zookeeper命令工具
在前一章的基础上在启动Zookeeper服务之后输入以下命令连接到Zookeeper服务。连接成功之后系统会输出Zookeeper的相关环境及配置信息并在屏幕输出“welcome to Zookeeper”等信息倒数几行的位置如下
[rootk8s-m1 bin]# zkCli.sh -server k8s-m1:2181
Connecting to k8s-m1:2181
2023-08-31 16:36:48,125 [myid:] - INFO [main:Environment100] - Client environment:zookeeper.version3.4.12-e5259e437540f349646870ea94dc2658c4e44b3b, built on 03/27/2018 03:55 GMT
2023-08-31 16:36:48,129 [myid:] - INFO [main:Environment100] - Client environment:host.namek8s-m1
2023-08-31 16:36:48,130 [myid:] - INFO [main:Environment100] - Client environment:java.version1.8.0_65
2023-08-31 16:36:48,132 [myid:] - INFO [main:Environment100] - Client environment:java.vendorOracle Corporation
2023-08-31 16:36:48,133 [myid:] - INFO [main:Environment100] - Client environment:java.home/opt/jdk1.8.0_65/jre
2023-08-31 16:36:48,133 [myid:] - INFO [main:Environment100] - Client environment:java.class.path/opt/zookeeper-3.4.12/bin/../build/classes:/opt/zookeeper-3.4.12/bin/../build/lib/*.jar:/opt/zookeeper-3.4.12/bin/../lib/slf4j-log4j12-1.7.25.jar:/opt/zookeeper-3.4.12/bin/../lib/slf4j-api-1.7.25.jar:/opt/zookeeper-3.4.12/bin/../lib/netty-3.10.6.Final.jar:/opt/zookeeper-3.4.12/bin/../lib/log4j-1.2.17.jar:/opt/zookeeper-3.4.12/bin/../lib/jline-0.9.94.jar:/opt/zookeeper-3.4.12/bin/../lib/audience-annotations-0.5.0.jar:/opt/zookeeper-3.4.12/bin/../zookeeper-3.4.12.jar:/opt/zookeeper-3.4.12/bin/../src/java/lib/*.jar:/opt/zookeeper-3.4.12/bin/../conf:.:/opt/jdk1.8.0_65/lib/dt.jar:/opt/jdk1.8.0_65/lib/tools.jar
2023-08-31 16:36:48,133 [myid:] - INFO [main:Environment100] - Client environment:java.library.path/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2023-08-31 16:36:48,133 [myid:] - INFO [main:Environment100] - Client environment:java.io.tmpdir/tmp
2023-08-31 16:36:48,133 [myid:] - INFO [main:Environment100] - Client environment:java.compilerNA
2023-08-31 16:36:48,133 [myid:] - INFO [main:Environment100] - Client environment:os.nameLinux
2023-08-31 16:36:48,133 [myid:] - INFO [main:Environment100] - Client environment:os.archamd64
2023-08-31 16:36:48,133 [myid:] - INFO [main:Environment100] - Client environment:os.version3.10.0-957.el7.x86_64
2023-08-31 16:36:48,133 [myid:] - INFO [main:Environment100] - Client environment:user.nameroot
2023-08-31 16:36:48,133 [myid:] - INFO [main:Environment100] - Client environment:user.home/root
2023-08-31 16:36:48,134 [myid:] - INFO [main:Environment100] - Client environment:user.dir/opt/apache-zookeeper-3.7.1-bin/bin
2023-08-31 16:36:48,135 [myid:] - INFO [main:ZooKeeper441] - Initiating client connection, connectStringk8s-m1:2181 sessionTimeout30000 watcherorg.apache.zookeeper.ZooKeeperMain$MyWatcher5c29bfd
Welcome to ZooKeeper!
2023-08-31 16:36:48,166 [myid:] - INFO [main-SendThread(k8s-m1:2181):ClientCnxn$SendThread1028] - Opening socket connection to server k8s-m1/192.168.2.140:2181. Will not attempt to authenticate using SASL (unknown error)
JLine support is enabled
2023-08-31 16:36:48,241 [myid:] - INFO [main-SendThread(k8s-m1:2181):ClientCnxn$SendThread878] - Socket connection established to k8s-m1/192.168.2.140:2181, initiating session
[zk: k8s-m1:2181(CONNECTING) 0] 2023-08-31 16:36:48,314 [myid:] - INFO [main-SendThread(k8s-m1:2181):ClientCnxn$SendThread1302] - Session establishment complete on server k8s-m1/192.168.2.140:2181, sessionid 0x1002552fac20000, negotiated timeout 30000WATCHER::WatchedEvent state:SyncConnected type:None path:null[zk: k8s-m1:2181(CONNECTED) 0]输入help之后屏幕会输出可用的Zookeeper命令如下所示
[zk: k8s-m1:2181(CONNECTED) 0]
[zk: k8s-m1:2181(CONNECTED) 0] help
ZooKeeper -server host:port cmd argsstat path [watch]set path data [version]ls path [watch]delquota [-n|-b] pathls2 path [watch]setAcl path aclsetquota -n|-b val pathhistory redo cmdnoprintwatches on|offdelete path [version]sync pathlistquota pathrmr pathget path [watch]create [-s] [-e] path data acladdauth scheme authquit getAcl pathclose connect host:port 使用Zookeeper命令的简单操作
1使用ls命令查看当前Zookeeper中所包含的内容ls /
[zk: k8s-m1:2181(CONNECTED) 1] ls /
[zookeeper]2创建一个新的Znode节点aa以及和它相关字符执行命令create /aa “first zookeeper”默认是不带编号的
[zk: k8s-m1:2181(CONNECTED) 2] create /aa first zookeeper
Created /aa创建带编号的持久性节点bb
[zk: k8s-m1:2181(CONNECTED) 3] create -s /bb bb
Created /bb0000000006创建不带编号的临时节点cc
[zk: k8s-m1:2181(CONNECTED) 4] create -e /cc cc
Created /cc创建带编号的临时节点dd
[zk: k8s-m1:2181(CONNECTED) 5] create -s -e /dd dd
Created /dd00000000083 再次使用ls命令来查看现在Zookeeper的中所包含的内容ls /
[zk: k8s-m1:2181(CONNECTED) 6] ls /
[aa, bb0000000006, cc, dd0000000008, zookeeper]此时看到上面的四个节点aa/bb/cc/dd都已经被创建。
关闭本次连接回话session并直接使用connect重新打开一个连接。
[zk: k8s-m1:2181(CONNECTED) 7] close
2023-08-31 20:17:54,078 [myid:] - INFO [main:ZooKeeper687] - Session: 0x1002552fac20002 closed
[zk: k8s-m1:2181(CLOSED) 8] 2023-08-31 20:17:54,084 [myid:] - INFO [main-EventThread:ClientCnxn$EventThread521] - EventThread shut down for session: 0x1002552fac20002[zk: k8s-m1:2181(CLOSED) 8] ls /
Not connected
[zk: k8s-m1:2181(CLOSED) 9] connect k8s-m1:2181
2023-08-31 20:18:22,837 [myid:] - INFO [main:ZooKeeper441] - Initiating client connection, connectStringk8s-m1:2181 sessionTimeout30000 watcherorg.apache.zookeeper.ZooKeeperMain$MyWatcher5680a178
[zk: k8s-m1:2181(CONNECTING) 10] 2023-08-31 20:18:22,841 [myid:] - INFO [main-SendThread(k8s-m1:2181):ClientCnxn$SendThread1028] - Opening socket connection to server k8s-m1/192.168.2.140:2181. Will not attempt to authenticate using SASL (unknown error)
2023-08-31 20:18:22,842 [myid:] - INFO [main-SendThread(k8s-m1:2181):ClientCnxn$SendThread878] - Socket connection established to k8s-m1/192.168.2.140:2181, initiating session
2023-08-31 20:18:22,863 [myid:] - INFO [main-SendThread(k8s-m1:2181):ClientCnxn$SendThread1302] - Session establishment complete on server k8s-m1/192.168.2.140:2181, sessionid 0x1002552fac20003, negotiated timeout 30000WATCHER::WatchedEvent state:SyncConnected type:None path:null重新查看临时节点已经随着上一次的会话关闭自动删除了
[zk: k8s-m1:2181(CONNECTED) 10] ls /
[aa, bb0000000006, zookeeper]
[zk: k8s-m1:2181(CONNECTED) 11] 4使用get命令来确认第二步中所创建的Znode是否包含我们创建的字符串执行命令get /aa
[zk: k8s-m1:2181(CONNECTED) 11] get /aa
first zookeeper
cZxid 0x20000000e
ctime Thu Aug 31 19:53:59 CST 2023
mZxid 0x20000000e
mtime Thu Aug 31 19:53:59 CST 2023
pZxid 0x20000000e
cversion 0
dataVersion 0
aclVersion 0
ephemeralOwner 0x0
dataLength 15
numChildren 0
[zk: k8s-m1:2181(CONNECTED) 12] 5接下来通过set命令来对zk所关联的字符串进行设置执行命令set /aa haha123
[zk: k8s-m1:2181(CONNECTED) 12] set /aa hello
cZxid 0x20000000e
ctime Thu Aug 31 19:53:59 CST 2023
mZxid 0x200000014
mtime Thu Aug 31 20:20:39 CST 2023
pZxid 0x20000000e
cversion 0
dataVersion 1
aclVersion 0
ephemeralOwner 0x0
dataLength 5
numChildren 0
[zk: k8s-m1:2181(CONNECTED) 13]6再次使用get命令来查看上次修改的内容执行命令get /aa
[zk: k8s-m1:2181(CONNECTED) 13] get /aa
hello
cZxid 0x20000000e
ctime Thu Aug 31 19:53:59 CST 2023
mZxid 0x200000014
mtime Thu Aug 31 20:20:39 CST 2023
pZxid 0x20000000e
cversion 0
dataVersion 1
aclVersion 0
ephemeralOwner 0x0
dataLength 5
numChildren 07下面我们将刚才创建的Znode删除执行命令delete /aa
[zk: k8s-m1:2181(CONNECTED) 14] delete /aa(8) 最后再次使用ls命令查看Zookeeper中的内容执行命令ls /
[zk: k8s-m1:2181(CONNECTED) 15] ls /
[bb0000000006, zookeeper]经过验证zk节点aa已经删除。 9 退出执行命令quit
[zk: k8s-m1:2181(CONNECTED) 17] quit
Quitting...
2023-08-31 20:22:07,820 [myid:] - INFO [main:ZooKeeper687] - Session: 0x1002552fac20003 closed
2023-08-31 20:22:07,820 [myid:] - INFO [main-EventThread:ClientCnxn$EventThread521] - EventThread shut down for session: 0x1002552fac20003
[rootk8s-m1 bin]# 查看状态信息
查看一个文件的状态信息
[zk: k8s-m1:2181(CONNECTED) 0] ls /
[bb0000000006, zookeeper]
[zk: k8s-m1:2181(CONNECTED) 1] stat /bb
Node does not exist: /bb
[zk: k8s-m1:2181(CONNECTED) 2] stat /bb0000000006
cZxid 0x20000000f
ctime Thu Aug 31 19:56:17 CST 2023
mZxid 0x20000000f
mtime Thu Aug 31 19:56:17 CST 2023
pZxid 0x20000000f
cversion 0
dataVersion 0
aclVersion 0
ephemeralOwner 0x0
dataLength 2
numChildren 0详细解释
zxid 一个事务编号zookeeper集群内部的所有事务都有一个全局的唯一的顺序的编号。 它由两部分组成 就是一个 64位的长整型 long 高32位: 用来标识leader关系是否改变如 0x2 低32位 用来做当前这个leader领导期间的全局的递增的事务编号如上面的0000000f
状态属性说明cZxid数据节点创建时的事务IDctime数据节点创建时的时间mZxid数据节点最后一次更新时的事务IDmtime数据节点最后一次更新时的时间pZxid数据节点的子节点列表最后一次被修改是子节点列表变更而不是子节点内容变更时的事务IDcversion子节点的版本号dataVersion数据节点的版本号aclVersion数据节点的ACL版本号ephemeralOwner如果节点是临时节点则表示创建该节点的会话的SessionID如果节点是持久节点则该属性值为0dataLength数据内容的长度numChildren数据节点当前的子节点个数
1修改节点a的数据mZxid、dataVersion、dataLength 存储信息发生变化
[zk: k8s-m1:2181(CONNECTED) 10] ls /
[bb0000000006, zookeeper]
[zk: k8s-m1:2181(CONNECTED) 12] create /aa first zookeeper
Created /aa
[zk: k8s-m1:2181(CONNECTED) 13] ls /
[bb0000000006, aa, zookeeper]
[zk: k8s-m1:2181(CONNECTED) 14] set /aa aa
cZxid 0x200000019
ctime Thu Aug 31 20:27:57 CST 2023
mZxid 0x20000001a
mtime Thu Aug 31 20:28:32 CST 2023
pZxid 0x200000019
cversion 0
dataVersion 1
aclVersion 0
ephemeralOwner 0x0
dataLength 2
numChildren 0
[zk: k8s-m1:2181(CONNECTED) 16] 2创建新的节点bb状态信息都会发生变化zxid的事物ID也会增加
[zk: k8s-m1:2181(CONNECTED) 18] create /bb second zookeeper
Created /bb
[zk: k8s-m1:2181(CONNECTED) 19] stat /bb
cZxid 0x20000001b
ctime Thu Aug 31 20:31:06 CST 2023
mZxid 0x20000001b
mtime Thu Aug 31 20:31:06 CST 2023
pZxid 0x20000001b
cversion 0
dataVersion 0
aclVersion 0
ephemeralOwner 0x0
dataLength 16
numChildren 03在aa节点下面新增节点bbpZxid、cversion、numChildren 发生改变
[zk: k8s-m1:2181(CONNECTED) 21] create /aa/bb aabb
Created /aa/bb
[zk: k8s-m1:2181(CONNECTED) 22] stat /aa
cZxid 0x200000019
ctime Thu Aug 31 20:27:57 CST 2023
mZxid 0x20000001a
mtime Thu Aug 31 20:28:32 CST 2023
pZxid 0x20000001c
cversion 1
dataVersion 1
aclVersion 0
ephemeralOwner 0x0
dataLength 2
numChildren 14ephemeralOwner 持久性的节点信息是0x0临时的几点信息是本次会话的sessionid如图 (5) 查看leader并将其干掉此时将选择另一台机器成为leader重新创建一个文件ff此时发现czxid的前3位和之前发生变化说明换了leader。其实前3位应该就是我们设置的serverid值。
#k8s-m2为leader
[rootk8s-m2 tmp]# /opt/apache-zookeeper-3.7.1-bin/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/apache-zookeeper-3.7.1-bin/bin/../conf/zoo.cfg
Mode: leader
[rootk8s-m2 tmp]# /opt/apache-zookeeper-3.7.1-bin/bin/zkServer.sh stop
ZooKeeper JMX enabled by default
Using config: /opt/apache-zookeeper-3.7.1-bin/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED#在原来的界面继续操作
[zk: k8s-m1:2181(CONNECTED) 2] create /f ff
Created /f
[zk: k8s-m1:2181(CONNECTED) 3] stat /f
cZxid 0x300000001
ctime Thu Aug 31 20:40:25 CST 2023
mZxid 0x300000001
mtime Thu Aug 31 20:40:25 CST 2023
pZxid 0x300000001
cversion 0
dataVersion 0
aclVersion 0
ephemeralOwner 0x0
dataLength 2
numChildren 0
[zk: k8s-m1:2181(CONNECTED) 4] 更多关于zookeeper的知识分享请前往博客主页。编写过程中能力有限难免出现差错敬请指正
