【Apache ZooKeeper】命令行zkCli.sh使用指南
ZooKeeper命令行
原文 http://blog.csdn.net/ganglia/article/details/11606807
ZooKeeper客户端有C语言和Java两个版本。
ZooKeeper的命令在/usr/lib/zookeeper/bin文件夹下。
运行Java版本的客户端使用bash zkCli.sh -server IP:port ，运行C语言版本的使用./cli_mt IP:port，下面介绍Java版本的，C语言版差不多。
查看具体结点信息
bash zkServer.sh status root@ubuntu:/usr/lib/zookeeper/bin# bash zkServer.sh status JMX enabled by default Using config: /usr/lib/zookeeper/bin/../conf/zoo.cfg Mode: standalone
查看哪个结点被选作leader或者follower echo stat|nc 127.0.0.1 2181 root@ubuntu:/usr/lib/zookeeper/bin# echo stat|nc 127.0.0.1 2181 Zookeeper version: 3.4.5-cdh4.4.0--1, built on 09/04/2013 01:46 GMT Clients: /127.0.0.1:57736[0](queued=0,recved=1,sent=0)
Latency min/avg/max: 0/0/0 Received: 1 Sent: 0 Connections: 1 Outstanding: 0 Zxid: 0x0 Mode: standalone Node count: 4
测试是否启动了该Server，若回复imok表示已经启动 echo ruok|nc 127.0.0.1 2181 root@ubuntu:/usr/lib/zookeeper/bin# echo ruok|nc 127.0.0.1 2181 imok
ZooKeeper命令行类似于shell。 当启动 ZooKeeper 服务成功之后，输入下述命令，连接到 ZooKeeper 服务： bash zkCli.sh –server 192.168.255.133:2181
root@ubuntu:/usr/lib/zookeeper/bin# bash zkCli.sh -server 192.168.255.133:2181 Connecting to 192.168.255.133:2181 2013-09-12 15:38:39,654 [myid:] - INFO [main:Environment@100] - Client environment:zookeeper.version=3.4.5-cdh4.4.0--1, built on 09/04/2013 01:46 GMT 2013-09-12 15:38:39,657 [myid:] - INFO [main:Environment@100] - Client environment:host.name=ubuntu 2013-09-12 15:38:39,659 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.6.0_43 2013-09-12 15:38:39,660 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Sun Microsystems Inc. 2013-09-12 15:38:39,662 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/local/jdk1.6.0_43/jre 2013-09-12 15:38:39,664 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/usr/lib/zookeeper/bin/../build/classes:/usr/lib/zookeeper/bin/../build/lib/*.jar:/usr/lib/zookeeper/bin/../lib/slf4j-log4j12-1.6.1.jar:/usr/lib/zookeeper/bin/../lib/slf4j-api-1.6.1.jar:/usr/lib/zookeeper/bin/../lib/netty-3.2.2.Final.jar:/usr/lib/zookeeper/bin/../lib/log4j-1.2.15.jar:/usr/lib/zookeeper/bin/../lib/jline-0.9.94.jar:/usr/lib/zookeeper/bin/../zookeeper-3.4.5-cdh4.4.0.jar:/usr/lib/zookeeper/bin/../src/java/lib/*.jar:/usr/lib/zookeeper/bin/../conf: 2013-09-12 15:38:39,665 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/local/jdk1.6.0_43/jre/lib/amd64/server:/usr/local/jdk1.6.0_43/jre/lib/amd64:/usr/local/jdk1.6.0_43/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib 2013-09-12 15:38:39,667 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp 2013-09-12 15:38:39,668 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=<NA> 2013-09-12 15:38:39,669 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux 2013-09-12 15:38:39,670 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64 2013-09-12 15:38:39,670 [myid:] - INFO [main:Environment@100] - Client environment:os.version=3.2.0-51-generic 2013-09-12 15:38:39,672 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root 2013-09-12 15:38:39,672 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root 2013-09-12 15:38:39,673 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/usr/lib/zookeeper/bin 2013-09-12 15:38:39,674 [myid:] - INFO [main:ZooKeeper@438] - Initiating client connection, connectString=192.168.255.133:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@2666e815 Welcome to ZooKeeper! JLine support is enabled 2013-09-12 15:38:39,720 [myid:] - INFO [main-SendThread(192.168.255.133:2181):ClientCnxn$SendThread@966] - Opening socket connection to server 192.168.255.133/192.168.255.133:2181. Will not attempt to authenticate using SASL (Unable to locate a login configuration) 2013-09-12 15:38:39,729 [myid:] - INFO [main-SendThread(192.168.255.133:2181):ClientCnxn$SendThread@849] - Socket connection established to 192.168.255.133/192.168.255.133:2181, initiating session [zk: 192.168.255.133:2181(CONNECTING) 0] 2013-09-12 15:38:39,748 [myid:] - INFO [main-SendThread(192.168.255.133:2181):ClientCnxn$SendThread@1207] - Session establishment complete on server 192.168.255.133/192.168.255.133:2181, sessionid = 0x141102059a70001, negotiated timeout = 30000
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
输入help显示帮助信息：
help 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 [zk: 192.168.255.133:2181(CONNECTED) 1]
连接成功后，系统会输出 ZooKeeper 的相关环境以及配置信息，并在屏幕输出“ Welcome to ZooKeeper ”等信息。
命令行工具的一些简单操作如下：
1 ）使用 ls 命令来查看当前 ZooKeeper 中所包含的内容： [zk: 202.115.36.251:2181(CONNECTED) 1] ls / [zookeeper]
2 ）创建一个新的 znode ，使用 create /zk myData 。这个命令创建了一个新的 znode 节点“ zk ”以及与它关联的字符串： [zk: 202.115.36.251:2181(CONNECTED) 2] create /zk "myData" Created /zk
3 ）我们运行 get 命令来确认 znode 是否包含我们所创建的字符串： [zk: 202.115.36.251:2181(CONNECTED) 3] get /zk cZxid = 0x6 ctime = Thu Sep 12 15:49:16 CST 2013 mZxid = 0x7 mtime = Thu Sep 12 15:49:38 CST 2013 pZxid = 0x6 cversion = 0 dataVersion = 1 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 10 numChildren = 0
4 ）下面我们通过 set 命令来对 zk 所关联的字符串进行设置： [zk: 202.115.36.251:2181(CONNECTED) 4] set /zk "zsl" "myData" cZxid = 0x4 ctime = Thu Sep 12 15:46:37 CST 2013 mZxid = 0x4 mtime = Thu Sep 12 15:46:37 CST 2013 pZxid = 0x4 cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 8 numChildren = 0
5 ）下面我们将刚才创建的 znode 删除： [zk: 202.115.36.251:2181(CONNECTED) 5] delete /zk
当然，我们还可以创建有曾次的目录，比如使用create /zk/node1在zk目录下创建新的目录node1 [zk: 192.168.255.133:2181(CONNECTED) 18] create /zk/node1 "node1" Created /zk/node1 [zk: 192.168.255.133:2181(CONNECTED) 19] ls /zk [node1]
使用ZooKeeper四字命令
传递四个字母的字符串给ZooKeeper，ZooKeeper会返回一些有用的信息。
|
ZooKeeper 四字命令 |
功能描述 |
|
conf |
输出相关服务配置的详细信息。 |
|
cons |
列出所有连接到服务器的客户端的完全的连接 / 会话的详细信息。包括“接受 / 发送”的包数量、会话 id 、操作延迟、最后的操作执行等等信息。 |
|
dump |
列出未经处理的会话和临时节点。 |
|
envi |
输出关于服务环境的详细信息（区别于 conf 命令）。 |
|
reqs |
列出未经处理的请求 |
|
ruok |
测试服务是否处于正确状态。如果确实如此，那么服务返回“imok ”，否则不做任何相应。 |
|
stat |
输出关于性能和连接的客户端的列表。 |
|
wchs |
列出服务器 watch 的详细信息。 |
|
wchc |
通过 session 列出服务器 watch 的详细信息，它的输出是一个与watch 相关的会话的列表。 |
|
wchp |
通过路径列出服务器 watch 的详细信息。它输出一个与 session相关的路径。 |
例如：
root@ubuntu:/usr/lib/zookeeper/bin# echo conf |nc 192.168.255.133 2181 clientPort=2181 dataDir=/var/lib/zookeeper/version-2 dataLogDir=/var/log/zookeeper/version-2 tickTime=2000 maxClientCnxns=50 minSessionTimeout=4000 maxSessionTimeout=40000 serverId=0
