“ZooKeeper 常用命令”的版本间的差异

2022年8月16日 (二) 07:43的版本

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

root@ca09cd8f59b4:/opt/zookeeper/bin# ./zkCli.sh
Connecting to localhost:2181
......
[zk: localhost:2181(CONNECTED) 0]

指定 host:port 连接指定 ZooKeeper 服务

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]

查询

查询当前节点下的全部子节点

ls 节点名称

[zk: localhost:2181(CONNECTED) 0] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 1]

查询当前节点下的数据

[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]

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

[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]

创建有序节点

[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]

创建临时节点

[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]

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

[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]

@@ 第1行： / 第1行： @@
-===ZooKeeper 常用命令===
+===启动命令行客户端连接 ZooKeeper 实例===
-====启动命令行客户端连接 ZooKeeper 实例====
@@ 第22行： / 第20行： @@
-====查询====
+===查询===
+==== 查询当前节点下的全部子节点 ====
-查询当前节点下的全部子节点
 ls 节点名称<syntaxhighlight lang="shell-session">
@@ 第32行： / 第29行： @@
 [zookeeper]
 [zk: localhost:2181(CONNECTED) 1]
-</syntaxhighlight>查询当前节点下的数据<syntaxhighlight lang="shell-session">
+</syntaxhighlight>
+==== 查询当前节点下的数据 ====
+<syntaxhighlight lang="shell-session">
 [zk: localhost:2181(CONNECTED) 4] get /zookeeper
@@ 第54行： / 第55行： @@
 mtime（modify time）是修改时间
-====创建节点====
+===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<syntaxhighlight lang="shell-session">
+-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
@@ 第78行： / 第82行： @@
 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>