常用命令
| 查看ZK服务状态 | bin/zkServer.sh status |
| 停止ZK服务 | bin/zkServer.sh stop |
| 重启ZK服务 | bin/zkServer.sh restart |
| 连接服务器 | zkCli.sh -server 127.0.0.1:2181 |
客户端连接
运行 zkCli.sh –server <ip>进入命令行工具
img在192.168.106.82服务器上连接到192.168.106.81服务器下的zk
img查看znode路径
查看根目录：
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| [zk: 192.168.106.81:2181(CONNECTED) 0] ls /
[zookeeper, mygirls]
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查看其它节点中的内容
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| [zk: 192.168.106.81:2181(CONNECTED) 1] ls /mygirls
[liuyifei, angelababy]
[zk: 192.168.106.81:2181(CONNECTED) 2] ls /zookeeper
[quota]
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创建节点
创建testnode节点，关联字符串”zz”
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| [zk: 192.168.106.81:2181(CONNECTED) 3] create /zookeeper/testnode "zzzzzzz"
Created /zookeeper/testnode
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获取znode数据，查看节点内容，设置节点内容，删除节点
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| [zk: 192.168.106.81:2181(CONNECTED) 4] get /mygirls
lsadasdasd
cZxid = 0x800000002
ctime = Wed Jan 04 23:26:09 CST 2017
mZxid = 0x80000000c
mtime = Wed Jan 04 23:38:06 CST 2017
pZxid = 0x800000004
cversion = 2
dataVersion = 6
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 10
numChildren = 2
[zk: 192.168.106.81:2181(CONNECTED) 5]
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设置节点内容
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| [zk: 192.168.106.81:2181(CONNECTED) 6] ls /mygirls
[liuyifei, angelababy]
[zk: 192.168.106.81:2181(CONNECTED) 7] set /mygirls/liuyifei aaaaaaa
cZxid = 0x800000003
ctime = Wed Jan 04 23:27:56 CST 2017
mZxid = 0x800000010
mtime = Thu Jan 05 00:50:37 CST 2017
pZxid = 0x800000003
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 7
numChildren = 0
[zk: 192.168.106.81:2181(CONNECTED) 8] get /mygirls/liuyifei
aaaaaaa
cZxid = 0x800000003
ctime = Wed Jan 04 23:27:56 CST 2017
mZxid = 0x800000010
mtime = Thu Jan 05 00:50:37 CST 2017
pZxid = 0x800000003
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 7
numChildren = 0
[zk: 192.168.106.81:2181(CONNECTED) 9]
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删除节点
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| [zk: 192.168.106.81:2181(CONNECTED) 15] ls /zookeeper
[testnode, quota]
[zk: 192.168.106.81:2181(CONNECTED) 16] delete /zookeeper/testnode
[zk: 192.168.106.81:2181(CONNECTED) 17] ls /zookeeper
[quota]
[zk: 192.168.106.81:2181(CONNECTED) 18]
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退出客户端的命令：quit
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| [zk: 192.168.106.81:2181(CONNECTED) 18] quit
Quitting...
2017-01-05 00:58:21,076 [myid:] - INFO [main:ZooKeeper@684] - Session: 0x25969e0732e0001 closed
2017-01-05 00:58:21,076 [myid:] - INFO [main-EventThread:ClientCnxn$EventThread@509] - EventThread shut down
[root@hadoop3 bin]
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监听znode事件
img当在82服务器上写ls /mygirls watch的时候，在81上创建一个znode,发现80上的上图出现提醒。
img
img开始的时候在80上执行get /mygirls watch，接着在81上执行set /mygirls bbbbbb，执行完成之后，发现在80上的右上角有消息提醒。
注意：监听器只生效一次
监听器的工作机制，其实是在客户端会专门创建一个监听线程，在本机的一个端口上等待zk集群发送过来事件
imgtelnet连接zookeeper
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| telnet 192.168.106.82 2181
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成功之后，输入conf，会出现一下内容：
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| clientPort=2181
dataDir=/home/tuzq/software/zookeeper/zkdata/version-2
dataLogDir=/home/tuzq/software/zookeeper/log/version-2
tickTime=2000
maxClientCnxns=60
minSessionTimeout=4000
maxSessionTimeout=40000
serverId=3
initLimit=10
syncLimit=5
electionAlg=3
electionPort=3888
quorumPort=2888
peerType=0
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