客户端连接

zkServer.sh start 启动zookeeper服务，运行 zkCli.sh –server ip 进入命令行工具

连接localhost的zookeeper的shell窗口

zkCli.sh -server localhost

连接hadoop01的zookeeper的shell窗口

zkCli.sh -server hadoop01

输入help，输出zk shell提示：

[zk: localhost:2181(CONNECTED) 7] help
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

shell基本操作

创建节点

create [-s] [-e] path data acl

其中，-s或-e分别指定节点特性，顺序或临时节点，若不指定，则表示持久节点；acl用来进行权限控制。
创建顺序节点：

[zk: hadoop01(CONNECTED) 0] create -s /test 123
Created /test0000000000

创建临时节点：

[zk: hadoop01(CONNECTED) 1] create -e /test-temp 123temp
Created /test-temp

创建永久节点：

[zk: hadoop01(CONNECTED) 2] create /test-p 123p
Created /test-p

读取节点

与读取相关的命令有ls 命令和get 命令，ls命令可以列出Zookeeper指定节点下的所有子节点，只能查看指定节点下的第一级的所有子节点；get命令可以获取Zookeeper指定节点的数据内容和属性信息。
　　ls path [watch]
　　get path [watch]
　　ls2 path [watch]

[zk: hadoop01(CONNECTED) 3] ls /
[test0000000000, test-p, zookeeper, test-temp]


[zk: hadoop01(CONNECTED) 4] get /
cZxid = 0x0
ctime = Thu Jan 01 08:00:00 CST 1970
mZxid = 0x0
mtime = Thu Jan 01 08:00:00 CST 1970
pZxid = 0x200000004
cversion = 2
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 4


[zk: hadoop01(CONNECTED) 5] ls2 /
[test0000000000, test-p, zookeeper, test-temp]
cZxid = 0x0
ctime = Thu Jan 01 08:00:00 CST 1970
mZxid = 0x0
mtime = Thu Jan 01 08:00:00 CST 1970
pZxid = 0x200000004
cversion = 2
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 0
numChildren = 4
[zk: hadoop01(CONNECTED) 6]

更新节点

set path data [version]
data就是要更新的新内容，version表示数据版本。

[zk: hadoop01(CONNECTED) 6] set /test-p 123pset 0
cZxid = 0x200000004
ctime = Mon Dec 09 15:49:52 CST 2019
mZxid = 0x200000005
mtime = Mon Dec 09 15:56:50 CST 2019
pZxid = 0x200000004
cversion = 0
dataVersion = 1
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 7
numChildren = 0

现在dataVersion已经变为1了，表示进行了更新。

删除节点

delete path [version]
若删除节点存在子节点，那么无法删除该节点，必须先删除子节点，再删除父节点。

Rmr path
可以递归删除节点。

quota
setquota -n|-b val path 对节点增加限制。
n:表示子节点的最大个数
b:表示数据值的最大长度
val:子节点最大个数或数据值的最大长度
path:节点路径

[zk: localhost:2181(CONNECTED) 2] create -e /quota quota
Created /quota

[zk: localhost:2181(CONNECTED) 3] setquota -n 2 /quota
Comment: the parts are option -n val 2 path /quota

listquota path 列出指定节点的quota

[zk: localhost:2181(CONNECTED) 4] listquota /quota
absolute path is /zookeeper/quota/quota/zookeeper_limits
Output quota for /quota count=2,bytes=-1
Output stat for /quota count=1,bytes=5

子节点个数为2，数据长度-1表示没限制
delquota [-n | -b] path 删除quota

其它命令

history：列出历史命令

[zk: localhost:2181(CONNECTED) 5] history
0 - create -e /qupta quota
1 - setquota -n 2 /quota
2 - create -e /quota quota
3 - setquota -n 2 /quota
4 - listquota /quota
5 - history

redo：该命令可以重新执行指定命令编号的历史命令，命令编号可以通过history查看。

[zk: localhost:2181(CONNECTED) 6] redo 5
0 - create -e /qupta quota
1 - setquota -n 2 /quota
2 - create -e /quota quota
3 - setquota -n 2 /quota
4 - listquota /quota
5 - history
6 - history