Zookeeper 4、Zookeeper开发

1、登录Zookeeper客户端

#通过zkCli.sh可以登录到Zookeeper

$ cd /usr/local/zookeeper-3.4.6/bin

$ ./zkCli.sh 

#如果显示下面这样就说明登录成功了

JLine support is enabled

WATCHER::

WatchedEvent state:SyncConnected type:None path:null

[zk: localhost:2181(CONNECTED) 0] 

2、如何在Zookeeper下使用帮助文档

#通过 -h命令可以可看Zookeeper下的所有命令和使用方法

[zk: localhost:2181(CONNECTED) 0] -h

ZooKeeper -server host:port cmd args

    connect host:port

    get path [watch]

    ls path [watch]

    set path data [version]

    rmr path

    delquota [-n|-b] path

    quit

    printwatches on|off

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

    stat path [watch]

    close

    ls2 path [watch]

    history

    listquota path

    setAcl path acl

    getAcl path

    sync path

    redo cmdno

    addauth scheme auth

    delete path [version]

    setquota -n|-b val path

　　下面是一些小练习：

#查看所有目录

ls /

#在Zookeeper的根目录下创建一个test的文件 内容是xxx

create / test2 womendoushixiaoxueshen

# 获取一个文件的值，下面是输出信息

get /test2

#womendoushixiaoxueshen

#cZxid = 0x4300000003

#ctime = Sun Mar 13 13:28:53 CST 2016

#mZxid = 0x4300000004

#mtime = Sun Mar 13 14:12:15 CST 2016

#pZxid = 0x4300000003

#cversion = 0

#dataVersion = 1

#aclVersion = 0

#ephemeralOwner = 0x0

#dataLength = 10

#numChildren = 0

#重新设置一个文件的值

 set /test2 helloword

#删除一个文件或目录

rmr /test2