部署zookeeper实践

 hadoop@datanode2:~/zookeeper-3.4.6/bin$ sh zkServer.sh
JMX enabled by default
zkServer.sh: 81: /home/hadoop/zookeeper-3.4.6/bin/zkEnv.sh: Syntax error: "(" unexpected (expecting "fi") 

11.命令行的操作

进入命令行

hadoop@namenode:~/zookeeper-3.4.6/bin$ zkCli.sh 

Connecting to localhost:2181
2014-11-16 01:18:30,600 [myid:] - INFO  [main:Environment@100] - Client environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT
2014-11-16 01:18:30,604 [myid:] - INFO  [main:Environment@100] - Client environment:host.name=namenode
2014-11-16 01:18:30,605 [myid:] - INFO  [main:Environment@100] - Client environment:java.version=1.7.0_65
2014-11-16 01:18:30,608 [myid:] - INFO  [main:Environment@100] - Client environment:java.vendor=Oracle Corporation
2014-11-16 01:18:30,608 [myid:] - INFO  [main:Environment@100] - Client environment:java.home=/usr/programs/jdk1.7.0_65/jre
2014-11-16 01:18:30,609 [myid:] - INFO  [main:Environment@100] - Client environment:java.class.path=/home/hadoop/zookeeper-3.4.6/bin/../build/classes:/home/hadoop/zookeeper-3.4.6/bin/../build/lib/*.jar:/home/hadoop/zookeeper-3.4.6/bin/../lib/slf4j-log4j12-1.6.1.jar:/home/hadoop/zookeeper-3.4.6/bin/../lib/slf4j-api-1.6.1.jar:/home/hadoop/zookeeper-3.4.6/bin/../lib/netty-3.7.0.Final.jar:/home/hadoop/zookeeper-3.4.6/bin/../lib/log4j-1.2.16.jar:/home/hadoop/zookeeper-3.4.6/bin/../lib/jline-0.9.94.jar:/home/hadoop/zookeeper-3.4.6/bin/../zookeeper-3.4.6.jar:/home/hadoop/zookeeper-3.4.6/bin/../src/java/lib/*.jar:/home/hadoop/zookeeper-3.4.6/bin/../conf:
2014-11-16 01:18:30,610 [myid:] - INFO  [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/i386:/lib:/usr/lib
2014-11-16 01:18:30,610 [myid:] - INFO  [main:Environment@100] - Client environment:java.io.tmpdir=/tmp
2014-11-16 01:18:30,611 [myid:] - INFO  [main:Environment@100] - Client environment:java.compiler=<NA>
2014-11-16 01:18:30,614 [myid:] - INFO  [main:Environment@100] - Client environment:os.name=Linux
2014-11-16 01:18:30,614 [myid:] - INFO  [main:Environment@100] - Client environment:os.arch=i386
2014-11-16 01:18:30,615 [myid:] - INFO  [main:Environment@100] - Client environment:os.version=3.5.0-23-generic
2014-11-16 01:18:30,615 [myid:] - INFO  [main:Environment@100] - Client environment:user.name=hadoop
2014-11-16 01:18:30,615 [myid:] - INFO  [main:Environment@100] - Client environment:user.home=/home/hadoop
2014-11-16 01:18:30,616 [myid:] - INFO  [main:Environment@100] - Client environment:user.dir=/home/hadoop/zookeeper-3.4.6/bin
2014-11-16 01:18:30,618 [myid:] - INFO  [main:ZooKeeper@438] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@e13c84
Welcome to ZooKeeper!
2014-11-16 01:18:30,653 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@975] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
2014-11-16 01:18:30,665 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@852] - Socket connection established to localhost/127.0.0.1:2181, initiating session
JLine support is enabled
2014-11-16 01:18:30,679 [myid:] - INFO  [main-SendThread(localhost:2181):ClientCnxn$SendThread@1235] - Session establishment complete on server localhost/127.0.0.1:2181, sessionid = 0x49b7dc68450002, negotiated timeout = 30000
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
[zk: localhost:2181(CONNECTED) 0] ls /
[zookeeper]
[zk: localhost:2181(CONNECTED) 1] ls /zookeeper
[quota]
[zk: localhost:2181(CONNECTED) 2] ls /zookeeper/quota
[]
[zk: localhost:2181(CONNECTED) 3] create /key value
Created /key

[zk: localhost:2181(CONNECTED) 5] ls / 
[key, zookeeper]

[zk: localhost:2181(CONNECTED) 6] get /key
value
cZxid = 0x100000006
ctime = Sun Nov 16 01:20:15 PST 2014
mZxid = 0x100000006
mtime = Sun Nov 16 01:20:15 PST 2014
pZxid = 0x100000006
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 5
numChildren = 0

12.测试zookeeper的一致性

在上一步（11.命令行的操作）里面，我们在namenode里面往zookeeper里面放了key，现在我们看看在其他节点datanode1是否也会出现这个

hadoop@namenode:~/zookeeper-3.4.6/bin$ ssh datanode1

hadoop@datanode1:~$ zkCli.sh 

[zk: localhost:2181(CONNECTED) 2] get /key
value
cZxid = 0x100000006
ctime = Sun Nov 16 01:20:15 PST 2014
mZxid = 0x100000006
mtime = Sun Nov 16 01:20:15 PST 2014
pZxid = 0x100000006
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 5
numChildren = 0

也是出现了key文件，表示在各个节点是有同步的

13.最后补充一个查看mode的命令

hadoop@datanode1:~/zookeeper-3.4.6/bin$ zkServer.sh status
JMX enabled by default
Using config: /home/hadoop/zookeeper-3.4.6/bin/../conf/zoo.cfg
Mode: leader