查看“ZooKeeper 常用命令”的源代码

===启动命令行客户端连接 ZooKeeper 实例===



未指定 host:port 默认连接本地 ZooKeeper 服务<syntaxhighlight lang="shell-session">
root@ca09cd8f59b4:/opt/zookeeper/bin# ./zkCli.sh
Connecting to localhost:2181
......
[zk: localhost:2181(CONNECTED) 0] 
</syntaxhighlight>



指定 host:port 连接指定 ZooKeeper 服务<syntaxhighlight lang="shell-session">
root@ca09cd8f59b4:/opt/zookeeper/bin# ./zkCli.sh 192.168.137.201:2121
Connecting to 192.168.137.201:2181
......
[zk: 192.168.137.201:2181(CONNECTED) 0] 
</syntaxhighlight>


===查询===

==== 查询当前节点下的全部子节点 ====


ls 节点名称<syntaxhighlight lang="shell-session">
[zk: localhost:2181(CONNECTED) 0] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 1]
</syntaxhighlight>


==== 查询当前节点下的数据 ====
<syntaxhighlight lang="shell-session">
[zk: localhost:2181(CONNECTED) 4] get /zookeeper

cZxid = 0x0
ctime = Thu Jan 01 00:00:00 UTC 1970
mZxid = 0x0
mtime = Thu Jan 01 00:00:00 UTC 1970
pZxid = 0x0
cversion = -1
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 1
[zk: localhost:2181(CONNECTED) 5] 

</syntaxhighlight>查询结果第一行是数据

ctime （create time）是创建时间

mtime（modify time）是修改时间

===创建节点===
create [-s] [-e] Znode名称 Znode数据

-s：sequence，有序节点

-e：ephemeral，临时节点

==== 创建普通节点 ====
<syntaxhighlight lang="shell-session">
[zk: localhost:2181(CONNECTED) 5] create /qf xxx
Created /qf
[zk: localhost:2181(CONNECTED) 6] ls /
[qf, zookeeper]
[zk: localhost:2181(CONNECTED) 7] get /qf
xxx
cZxid = 0x6
ctime = Tue Aug 16 01:10:18 UTC 2022
mZxid = 0x6
mtime = Tue Aug 16 01:10:18 UTC 2022
pZxid = 0x6
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 3
numChildren = 0
[zk: localhost:2181(CONNECTED) 8] 
</syntaxhighlight>

==== 创建有序节点 ====
<syntaxhighlight lang="shell-session">
[zk: localhost:2181(CONNECTED) 8] create -s /qf yyy
Created /qf0000000001
[zk: localhost:2181(CONNECTED) 9] create -s /qf yyy
Created /qf0000000002
[zk: localhost:2181(CONNECTED) 10] 
</syntaxhighlight>

==== 创建临时节点 ====
<syntaxhighlight lang="shell-session">
[zk: localhost:2181(CONNECTED) 1] create -e /temp uuu
Created /temp
[zk: localhost:2181(CONNECTED) 2] ls /
[qf, temp, qf0000000001, qf0000000002, zookeeper]
[zk: localhost:2181(CONNECTED) 3] 
</syntaxhighlight>只要当前 ZooKeeper 客户端和 ZooKeeper 服务器断开连接，临时节点就会消失，但持久节点不会


==== 创建临时有序节点 ====
<syntaxhighlight lang="shell-session">
[zk: localhost:2181(CONNECTED) 3] create -s -e /temp uuu
Created /temp0000000005
[zk: localhost:2181(CONNECTED) 4] create -s -e /temp uuu
Created /temp0000000006
[zk: localhost:2181(CONNECTED) 5] create -s -e /temp uuu
Created /temp0000000007
[zk: localhost:2181(CONNECTED) 6] create -s -e /temp uuu
Created /temp0000000008
[zk: localhost:2181(CONNECTED) 7] ls /
[temp0000000006, temp0000000007, temp0000000005, qf0000000001, qf0000000002, temp0000000008, zookeeper, qf, temp]
[zk: localhost:2181(CONNECTED) 8]

</syntaxhighlight>

==== 退出确认之前创建的临时节点已经消失 ====
<syntaxhighlight lang="shell-session">
[zk: localhost:2181(CONNECTED) 9] quit
Quitting...
2022-08-16 01:27:33,264 [myid:] - INFO  [main:ZooKeeper@684] - Session: 0x182a3a9cf540003 closed
2022-08-16 01:27:33,264 [myid:] - INFO  [main-EventThread:ClientCnxn$EventThread@512] - EventThread shut down
root@ca09cd8f59b4:/opt/zookeeper/bin# ./zkCli.sh
Connecting to localhost:2181
......
Welcome to ZooKeeper!
......
[zk: localhost:2181(CONNECTED) 0] ls /
[qf0000000001, qf0000000002, zookeeper, qf]
[zk: localhost:2181(CONNECTED) 1] 

</syntaxhighlight>

==== 修改节点数据 ====
set znode名称 新数据<syntaxhighlight lang="shell-session">
[zk: localhost:2181(CONNECTED) 1] get /qf
xxx
......
[zk: localhost:2181(CONNECTED) 2] set /qf yyy
......
[zk: localhost:2181(CONNECTED) 3] get /qf
yyy
......
[zk: localhost:2181(CONNECTED) 4] get /qf
yyy
......
[zk: localhost:2181(CONNECTED) 5]

</syntaxhighlight>





=== 退出 ZooKeeper ===
<syntaxhighlight lang="shell-session">
[zk: localhost:2181(CONNECTED) 9] quit
Quitting...
2022-08-16 01:27:33,264 [myid:] - INFO  [main:ZooKeeper@684] - Session: 0x182a3a9cf540003 closed
2022-08-16 01:27:33,264 [myid:] - INFO  [main-EventThread:ClientCnxn$EventThread@512] - EventThread shut down
root@ca09cd8f59b4:/opt/zookeeper/bin#
</syntaxhighlight>