Zookeeper的客户端操作
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常用操作命令： 1）一台机器进入Zookeeper客户端：bin/zkCli.sh 一台机器退出Zookeeper客户端：quit 2）查看：ls 根目录（必须加） 3) 启动:bin/zkServer.sh start 4) 停止:bin/zkServer.sh 5）查看状态: bin/zkServer.sh status 注：如果希望节点开启时Zookeeper也随着启动，就在配置文件/etc/profile里加上这句-- /opt/module/zookeeper-3.4.10/bin/zkServer.sh start 即可。 |
1.各机器启动zookeeper
每台机器都启动zookeeper：
1）先到此目录下：/opt/module/zookeeper-3.4.10/bin
2）之后依次在bigdata111和bigdata112、bigdata113上输入命令：
[root@bigdata111 bin]#./zkServer.sh start
3）查看节点工作状态：
[root@bigdata111 bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default Using config: /opt/module/zookeeper-3.4.10/bin/../conf/zoo.cfg Mode: follower
[root@bigdata112 bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default Using config: /opt/module/zookeeper-3.4.10/bin/../conf/zoo.cfg Mode: leader
[root@bigdata113 bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default Using config: /opt/module/zookeeper-3.4.10/bin/../conf/zoo.cfg Mode: follower
2.停止zookeeper
[root@bigdata113 bin]#./zkServer.sh stop
3.客户端命令行操作
这里可以先进入bigdata111的客户端里：
[root@bigdata111 bin]# ./zkCli.sh
后续操作：
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命令基本语法 |
功能描述 |
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help |
显示所有操作命令 |
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ls path [watch] |
使用 ls 命令来查看当前znode中所包含的内容【watch--可监听】 |
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ls2 path [watch] |
查看当前节点数据并能看到更新次数等数据 |
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create |
普通创建(永久节点) -s 含有序列 -e 临时（重启或者超时消失） |
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get path [watch] |
获得节点的值-watch可修改此节点的值 |
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set |
设置节点的具体值 |
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stat |
查看节点状态 |
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delete |
删除节点 |
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rmr |
递归删除节点 |
1）启动客户端
[itstar@bigdata112 zookeeper-3.4.10]$ bin/zkCli.sh
2）显示所有操作命令
[zk: localhost:2181(CONNECTED) 1] help
3）查看当前znode中所包含的内容
[zk: localhost:2181(CONNECTED) 0] ls /
[zookeeper]
4）查看当前节点数据并能看到更新次数等数据
[zk: localhost:2181(CONNECTED) 1] ls2 /
[zookeeper]
cZxid = 0x0
ctime = Thu Jan 01 08:00:00 CST 1970
mZxid = 0x0
mtime = Thu Jan 01 08:00:00 CST 1970
pZxid = 0x0
cversion = -1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 1
5）创建普通节点
[zk: localhost:2181(CONNECTED) 2] create /app1 "hello app1"
（注意：创建的节点里必须有数据）
Created /app1
例如：
[zk: localhost:2181(CONNECTED) 4] create /Renne "liuxinrong"（引号里面是内容-字符串）
Created /Renne
[zk: localhost:2181(CONNECTED) 5] ls /
[Renne, zookeeper]
[zk: localhost:2181(CONNECTED) 4] create /app1/server101 "192.168.1.101"
Created /app1/server101
6）获得节点的值
[zk: localhost:2181(CONNECTED) 6] get /app1
hello app1
cZxid = 0x20000000a
ctime = Mon Jul 17 16:08:35 CST 2017
mZxid = 0x20000000a
mtime = Mon Jul 17 16:08:35 CST 2017
pZxid = 0x20000000b
cversion = 1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0（临时节点）
dataLength = 10
numChildren = 1
[zk: localhost:2181(CONNECTED) 8] get /app1/server101
192.168.1.101
cZxid = 0x20000000b
ctime = Mon Jul 17 16:11:04 CST 2017
mZxid = 0x20000000b
mtime = Mon Jul 17 16:11:04 CST 2017
pZxid = 0x20000000b
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 13
numChildren = 0
7）创建短暂节点
[zk: localhost:2181(CONNECTED) 9] create -e /app-emphemeral 8888
（1）在当前客户端是能查看到的
[zk: localhost:2181(CONNECTED) 10] ls /
[app1, app-emphemeral, zookeeper]
（2）退出当前客户端然后再重启客户端
[zk: localhost:2181(CONNECTED) 12] quit
[itstar@bigdata113 zookeeper-3.4.10]$ bin/zkCli.sh
（3）再次查看根目录下短暂节点已经删除
[zk: localhost:2181(CONNECTED) 0] ls /
[app1, zookeeper]
8）创建带序号的节点
（1）先创建一个普通的根节点app2
[zk: localhost:2181(CONNECTED) 11] create /app2 "app2"
（2）创建带序号的节点
[zk: localhost:2181(CONNECTED) 13] create -s /app2/aa 888
Created /app2/aa0000000000
[zk: localhost:2181(CONNECTED) 14] create -s /app2/bb 888
Created /app2/bb0000000001
[zk: localhost:2181(CONNECTED) 15] create -s /app2/cc 888
Created /app2/cc0000000002
如果原节点下有1个节点，则再排序时从1开始，以此类推。
[zk: localhost:2181(CONNECTED) 16] create -s /app1/aa 888
Created /app1/aa0000000001
接着举例：
[zk: localhost:2181(CONNECTED) 9] create -s /Renn00000000003/renn0 "liu0"
Created /Renn00000000003/renn00000000000
[zk:localhost:2181(CONNECTED)10]create -s /Renn00000000003/renn0000000000033 "liu1"
Created /Renn00000000003/renn00000000000330000000001
9）修改节点数据值
[zk: localhost:2181(CONNECTED) 2] set /app1 999
10）节点的值变化监听--只监听一次
（1）在104主机上注册监听/app1节点数据变化
[zk: localhost:2181(CONNECTED) 26] get /app1 watch
（2）在103主机上修改/app1节点的数据
[zk: localhost:2181(CONNECTED) 5] set /app1 777
（3）观察104主机收到数据变化的监听
WATCHER::
WatchedEvent state:SyncConnected type:NodeDataChanged path:/app1
之后按回车就恢复回去了
11）节点的子节点变化监听（路径变化）
（1）在104主机上注册监听/app1节点的子节点变化
[zk: localhost:2181(CONNECTED) 1] ls /app1 watch
[aa0000000001, server101]
（2）在103主机/app1节点上创建子节点
[zk: localhost:2181(CONNECTED) 6] create /app1/bb 666
Created /app1/bb
（3）观察104主机收到子节点变化的监听
WATCHER::
WatchedEvent state:SyncConnected type:NodeChildrenChanged path:/app1
12）删除节点
[zk: localhost:2181(CONNECTED) 4] delete /app1/bb
13）递归删除节点
[zk: localhost:2181(CONNECTED) 7] rmr /app2
14）查看节点状态
[zk: localhost:2181(CONNECTED) 12] stat /app1
cZxid = 0x20000000a
ctime = Mon Jul 17 16:08:35 CST 2017
mZxid = 0x200000018
mtime = Mon Jul 17 16:54:38 CST 2017
pZxid = 0x20000001c
cversion = 4
dataVersion = 2
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 3
numChildren = 2
