zookeeper 客服端使用

港控/mmm° 2024-04-20 09:57 67阅读 0赞

1、登录客户端

[root@vm254200 bin]# ./zkCli.sh -timeout 5000 -server 192.168.254.200:2181
    Connecting to 192.168.254.200:2181
    2019-09-20 20:23:29,629 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.14-4c25d480e66aadd371de8bd2fd8da255ac140bcf, built on 03/06/2019 16:18 GMT
    2019-09-20 20:23:29,633 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=vm254200

**命令集**

[zk: 192.168.254.200:2181(CONNECTED) 6] h
    ZooKeeper -server host:port cmd args
            stat path [watch]
            set path data [version]
            ls path [watch]
            delquota [-n|-b] path
            ls2 path [watch]
            setAcl path acl
            setquota -n|-b val path
            history 
            redo cmdno
            printwatches on|off
            delete path [version]
            sync path
            listquota path
            rmr path
            get path [watch]
            create [-s] [-e] path data acl
            addauth scheme auth
            quit 
            getAcl path
            close 
            connect host:port

**2、列出节点信息 ls path \[watch\]**

[zk: 192.168.254.200:2181(CONNECTED) 1] ls /
    [zookeeper]
    [zk: 192.168.254.200:2181(CONNECTED) 2] ls /zookeeper
    [quota]

**3、查询节点状态信息 stat 节点信息 stat path \[watch\]**

[zk: 192.168.254.200:2181(CONNECTED) 5] stat /zookeeper
    cZxid = 0x0    #该节点被创建时的事务ID
    ctime = Thu Jan 01 08:00:00 CST 1970  #创建时间
    mZxid = 0x0    #最后一次更新时的事务ID
    mtime = Thu Jan 01 08:00:00 CST 1970  #修改时间
    pZxid = 0x0    #子节点列表最后一次修改时的事务ID（创建子节点或删除子节点信息是变更）
    cversion = -1  #子节点版本号
    dataVersion = 0 #数据版本号
    aclVersion = 0  #权限版本号
    ephemeralOwner = 0x0   #创建此临时节点的事务ID
    dataLength = 0  #当前节点数据的长度
    numChildren = 1  #当前节点拥有子节点的个数

**4、获取节点数据内容 get path \[watch\]**

**5、 列出子节点及状态信息 ls2 path \[watch\]**

[zk: 192.168.254.200:2181(CONNECTED) 8] ls2 /zookeeper
    [quota]
    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

**6、创建节点 create \[-s\] \[-e\] path data acl**

\-s 表示是顺序节点

\-e 表示是临时节点，**会话结束后就会删除**

path 表示是路径

data 表示数据

acl 表示权限

[zk: 192.168.254.200:2181(CONNECTED) 9] create /node_1 123
    Created /node_1
    
    [zk: 192.168.254.200:2181(CONNECTED) 10] get /node_1
    123
    cZxid = 0x200000002
    ctime = Fri Sep 20 20:47:57 CST 2019
    mZxid = 0x200000002
    mtime = Fri Sep 20 20:47:57 CST 2019
    pZxid = 0x200000002
    cversion = 0
    dataVersion = 0
    aclVersion = 0
    ephemeralOwner = 0x0
    dataLength = 3
    numChildren = 0
    
    [zk: 192.168.254.200:2181(CONNECTED) 11] create /node_1/node_1 234
    Created /node_1/node_1
    
    [zk: 192.168.254.200:2181(CONNECTED) 12] create -e /node_1/node_2 2341234
    Created /node_1/node_2

7、退出 quit

8、修改节点值 set path data \[version\]

*  path：路径
 *  data：数据
 *  version：版本

每次修改 cversion 会递增、dataVersion也会递增

[zk: 192.168.254.200:2181(CONNECTED) 16] set /node_2 999
    cZxid = 0x20000000b
    ctime = Fri Sep 20 21:02:28 CST 2019
    mZxid = 0x20000001b
    mtime = Fri Sep 20 21:04:32 CST 2019
    pZxid = 0x20000000b
    cversion = 0
    dataVersion = 1
    aclVersion = 0
    ephemeralOwner = 0x0
    dataLength = 3
    numChildren = 0
    [zk: 192.168.254.200:2181(CONNECTED) 17] get /node_2
    999
    cZxid = 0x20000000b
    ctime = Fri Sep 20 21:02:28 CST 2019
    mZxid = 0x20000001b
    mtime = Fri Sep 20 21:04:32 CST 2019
    pZxid = 0x20000000b
    cversion = 0
    dataVersion = 1
    aclVersion = 0
    ephemeralOwner = 0x0
    dataLength = 3
    numChildren = 0

version 必须和查询的dataVersion版本保持一致（等于dataVersion ）大于查询的版本会报错

[zk: 192.168.254.200:2181(CONNECTED) 22] set /node_2 999 0
    version No is not valid : /node_2
    [zk: 192.168.254.200:2181(CONNECTED) 23] set /node_2 999 4
    cZxid = 0x20000000b
    ctime = Fri Sep 20 21:02:28 CST 2019
    mZxid = 0x200000020
    mtime = Fri Sep 20 21:11:49 CST 2019
    pZxid = 0x20000000b
    cversion = 0
    dataVersion = 5
    aclVersion = 0
    ephemeralOwner = 0x0
    dataLength = 3
    numChildren = 0
    [zk: 192.168.254.200:2181(CONNECTED) 24]

9、 删除指定路径数据节点 delete path \[version\]

[zk: 192.168.254.200:2181(CONNECTED) 25] delete /node_1/node_1
    [zk: 192.168.254.200:2181(CONNECTED) 26] ls
    [zk: 192.168.254.200:2181(CONNECTED) 27] ls /node_1
    []

删除有子节点的节点，循环删除 rmr path

[zk: 192.168.254.200:2181(CONNECTED) 31] rmr /node_1
    [zk: 192.168.254.200:2181(CONNECTED) 32] ls /
    [node_20000000008, node_20000000007, node_20000000009, zookeeper, node_20000000004, node_20000000015, node_20000000003, node_20000000014, node_20000000006, node_20000000005, node_20000000016, node_20000000011, node_20000000010, node_20000000002, node_20000000013, node_20000000012, node_2]
    [zk: 192.168.254.200:2181(CONNECTED) 33]

10、配额相关指令 setquota -n|-b val path

*  \-n 限制子节点的个数 val 子节点个数
 *  \-b 限制子节点的长度 val 子节点长度

[zk: 192.168.254.200:2181(CONNECTED) 36] setquota -n 2 /node_2
    Comment: the parts are option -n val 2 path /node_2
    
    [zk: 192.168.254.200:2181(CONNECTED) 37] create /node_2/node_2  123412
    Created /node_2/node_2
    
    [zk: 192.168.254.200:2181(CONNECTED) 38] create /node_2/node_3  123412
    Created /node_2/node_3
    
    #设置了配额为2，也会创建成功
    [zk: 192.168.254.200:2181(CONNECTED) 39] ls /node_2
    [node_1, node_2, node_3]

但是会在/usr/local/zookeeper-3.4.14/bin/zookeeper.out 日志文件 抛出警告信息

[root@vm254200 bin]# tail zookeeper.out 
    [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:ZooKeeperServer@949] - Client attempting to establish new session at /192.168.254.200:44834
    2019-09-20 21:02:15,949 [myid:1] - INFO  [CommitProcessor:1:ZooKeeperServer@694] - Established session 0x10000054ef50003 with negotiated timeout 5000 for client /192.168.254.200:44834
    2019-09-20 21:21:54,655 [myid:1] - WARN  [CommitProcessor:1:DataTree@302] - Quota exceeded: /node_2 count=3 limit=2
    2019-09-20 21:21:59,460 [myid:1] - WARN  [CommitProcessor:1:DataTree@302] - Quota exceeded: /node_2 count=4 limit=2

查看指定数据节点配额数据情况：listquota path

[zk: 192.168.254.200:2181(CONNECTED) 40] listquota /node_2
    absolute path is /zookeeper/quota/node_2/zookeeper_limits
    Output quota for /node_2 count=2,bytes=-1  #当前节点的配额信息   -1 是长度没有限制
    Output stat for /node_2 count=4,bytes=21   #当前节点的状态信息   21 是自己的数据长度+子节点的数据长度

删除节点配额信息 delquota \[-n|-b\] path

[zk: 192.168.254.200:2181(CONNECTED) 41] delquota -n /node_2
    [zk: 192.168.254.200:2181(CONNECTED) 42] listquota /node_2  
    absolute path is /zookeeper/quota/node_2/zookeeper_limits
    Output quota for /node_2 count=-1,bytes=-1  #节点个数没有限制
    Output stat for /node_2 count=4,bytes=21

11、列出所有指令的历史 history

[zk: 192.168.254.200:2181(CONNECTED) 43] history
    33 - ls /
    34 - create /node_2/node_1
    35 - create /node_2/node_1  123412
    36 - setquota -n 2 /node_2
    37 - create /node_2/node_2  123412
    38 - create /node_2/node_3  123412
    39 - ls /node_2
    40 - listquota /node_2
    41 - delquota -n /node_2
    42 - listquota /node_2
    43 - history

12、重复执行历史命令中的某一个指令 redo 14

[zk: 192.168.254.200:2181(CONNECTED) 44] redo 34
    [zk: 192.168.254.200:2181(CONNECTED) 45]