Centos 搭建 zookeeper

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Centos 搭建 zookeeper

时间:2016-11-15 11:16来源:linux.it.net.cn 作者:IT

安装

zookeeper-3.4.9.tar.gz

下载：

https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/stable/zookeeper-3.4.9.tar.gz

为了方便管理，我放在目录/opt/中

解压:

tar zxf zookeeper-3.4.9.tar.gz

进入配置目录：

cd zookeeper-3.4.9/conf

创建配置(直接clone样例配置)：

cp zoo_sample.cfg zoo.cfg

注：zoo_sample.cfg是一个用来demo的例子配置

先配置单机模式：

修改配置：

# The number of milliseconds of each tick

tickTime=2000

# The number of ticks that the initial

# synchronization phase can take

initLimit=10

# The number of ticks that can pass between

# sending a request and getting an acknowledgement

syncLimit=5

# the directory where the snapshot is stored.

# do not use /tmp for storage, /tmp here is just

# example sakes.

dataDir=/opt/zookeeper-3.4.9/data

// 日志文件

dataLogDir=/opt/zookeeper-3.4.9/logs

# the port at which the clients will connect

clientPort=2181

# the maximum number of client connections.

# increase this if you need to handle more clients

#maxClientCnxns=60

#

# Be sure to read the maintenance section of the

# administrator guide before turning on autopurge.

#

# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance

#

# The number of snapshots to retain in dataDir

#autopurge.snapRetainCount=3

# Purge task interval in hours

# Set to "0" to disable auto purge feature

#autopurge.purgeInterval=1

配置环境变量:

打开系统配置文件：

vim /etc/profile

加入：

export ZOOKEEPER_HOME=/opt/zookeeper-3.4.9/

追加到环境变量$Path中：

export PATH=$PATH:….$ZOOKEEPER_HOME/bin/

退出：

:wq

重新激活环境变量配置：

[root@centos_105_239 bin]# source /etc/profile

启动ZooKeeper:

[root@centos_105_239 bin]# zkServer.sh start

ZooKeeper JMX enabled by default

Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED

查询zk的状态：

[root@centos_105_239 bin]# zkServer.sh status

ZooKeeper JMX enabled by default

Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg

Mode: standalone

关闭ZooKeeper:

[root@centos_105_239 bin]# zkServer.sh stop

ZooKeeper JMX enabled by default

Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg

Stopping zookeeper ... STOPPED

重启ZooKeeper(由于当前是关闭状态，所以会有下面no zookeeper的信息):

[root@centos_105_239 bin]# zkServer.sh restart

ZooKeeper JMX enabled by default

Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg

ZooKeeper JMX enabled by default

Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg

Stopping zookeeper ... no zookeeper to stop (could not find file /opt/zookeeper-3.4.9/data

/opt/zookeeper-3.4.9/logs/zookeeper_server.pid)

ZooKeeper JMX enabled by default

Using config: /opt/zookeeper-3.4.9/bin/../conf/zoo.cfg

Starting zookeeper ... STARTED

客户端测试链接服务端：

[root@centos_105_239 bin]# zkCli.sh -server 127.0.0.1:2181

Connecting to 127.0.0.1:2181

2016-11-01 22:20:40,226 [myid:] - INFO [main:Environment@100] - Client environment:zookeeper.version=3.4.9-1757313, built on 08/23/2016 06:50 GMT

2016-11-01 22:20:40,229 [myid:] - INFO [main:Environment@100] - Client environment:host.name=<NA>

2016-11-01 22:20:40,229 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.8.0_111

2016-11-01 22:20:40,230 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=Oracle Corporation

2016-11-01 22:20:40,231 [myid:] - INFO [main:Environment@100] - Client environment:java.home=/usr/java/jdk1.8.0_111/jre

2016-11-01 22:20:40,231 [myid:] - INFO [main:Environment@100] - Client environment:java.class.path=/opt/zookeeper-3.4.9/bin/../build/classes:/opt/zookeeper-3.4.9/bin/../build/lib/*.jar:/opt/zookeeper-3.4.9/bin/../lib/slf4j-log4j12-1.6.1.jar:/opt/zookeeper-3.4.9/bin/../lib/slf4j-api-1.6.1.jar:/opt/zookeeper-3.4.9/bin/../lib/netty-3.10.5.Final.jar:/opt/zookeeper-3.4.9/bin/../lib/log4j-1.2.16.jar:/opt/zookeeper-3.4.9/bin/../lib/jline-0.9.94.jar:/opt/zookeeper-3.4.9/bin/../zookeeper-3.4.9.jar:/opt/zookeeper-3.4.9/bin/../src/java/lib/*.jar:/opt/zookeeper-3.4.9/bin/../conf:

2016-11-01 22:20:40,231 [myid:] - INFO [main:Environment@100] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib

2016-11-01 22:20:40,231 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp

2016-11-01 22:20:40,231 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=<NA>

2016-11-01 22:20:40,231 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux

2016-11-01 22:20:40,231 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64

2016-11-01 22:20:40,231 [myid:] - INFO [main:Environment@100] - Client environment:os.version=3.10.0-327.el7.x86_64

2016-11-01 22:20:40,231 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root

2016-11-01 22:20:40,231 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root

2016-11-01 22:20:40,231 [myid:] - INFO [main:Environment@100] - Client environment:user.dir=/opt/zookeeper-3.4.9/bin

2016-11-01 22:20:40,232 [myid:] - INFO [main:ZooKeeper@438] - Initiating client connection, connectString=127.0.0.1:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@446cdf90

Welcome to ZooKeeper!

JLine support is enabled

2016-11-01 22:20:40,345 [myid:] - INFO [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1032] - Opening socket connection to server 127.0.0.1/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)

2016-11-01 22:20:40,505 [myid:] - WARN [main-SendThread(127.0.0.1:2181):ClientCnxn$SendThread@1162] - Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect

java.net.ConnectException: Connection refused

at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)

at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:361)

at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1141)

解决：重启Zookeeper服务 - zkServer.sh restart

从新测试客户端链接服务端：

[root@centos_105_239bin]# zkCli.sh

Connecting tolocalhost:2181

2016-11-0217:16:01,054 [myid:] - INFO [main:Environment@100] - Clientenvironment:zookeeper.version=3.4.9-1757313, built on 08/23/2016 06:50 GMT

2016-11-0217:16:01,062 [myid:] - INFO [main:Environment@100] - Client environment:host.name=Centos_105_239

2016-11-0217:16:01,062 [myid:] - INFO [main:Environment@100] - Client environment:java.version=1.8.0_111

2016-11-0217:16:01,066 [myid:] - INFO [main:Environment@100] - Client environment:java.vendor=OracleCorporation

2016-11-0217:16:01,066 [myid:] - INFO [main:Environment@100] - Clientenvironment:java.home=/usr/java/jdk1.8.0_111/jre

2016-11-0217:16:01,066 [myid:] - INFO [main:Environment@100] - Clientenvironment:java.class.path=/opt/zookeeper-3.4.9/bin/../build/classes:/opt/zookeeper-3.4.9/bin/../build/lib/*.jar:/opt/zookeeper-3.4.9/bin/../lib/slf4j-log4j12-1.6.1.jar:/opt/zookeeper-3.4.9/bin/../lib/slf4j-api-1.6.1.jar:/opt/zookeeper-3.4.9/bin/../lib/netty-3.10.5.Final.jar:/opt/zookeeper-3.4.9/bin/../lib/log4j-1.2.16.jar:/opt/zookeeper-3.4.9/bin/../lib/jline-0.9.94.jar:/opt/zookeeper-3.4.9/bin/../zookeeper-3.4.9.jar:/opt/zookeeper-3.4.9/bin/../src/java/lib/*.jar:/opt/zookeeper-3.4.9/bin/../conf:

2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Clientenvironment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib

2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Client environment:java.io.tmpdir=/tmp

2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Client environment:java.compiler=<NA>

2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Client environment:os.name=Linux

2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Client environment:os.arch=amd64

2016-11-0217:16:01,067 [myid:] - INFO [main:Environment@100] - Clientenvironment:os.version=3.10.0-327.el7.x86_64

2016-11-0217:16:01,068 [myid:] - INFO [main:Environment@100] - Client environment:user.name=root

2016-11-0217:16:01,068 [myid:] - INFO [main:Environment@100] - Client environment:user.home=/root

2016-11-0217:16:01,068 [myid:] - INFO [main:Environment@100] - Clientenvironment:user.dir=/opt/zookeeper-3.4.9/bin

2016-11-0217:16:01,073 [myid:] - INFO [main:ZooKeeper@438] - Initiating client connection,connectString=localhost:2181 sessionTimeout=30000watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@446cdf90

Welcome toZooKeeper!

JLine support isenabled

2016-11-0217:16:06,165 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1032] - Openingsocket connection to server localhost/127.0.0.1:2181. Will not attempt toauthenticate using SASL (unknown error)

2016-11-0217:16:06,306 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@876] - Socketconnection established to localhost/127.0.0.1:2181, initiating session

2016-11-0217:16:06,328 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1299] - Sessionestablishment complete on server localhost/127.0.0.1:2181, sessionid =0x15823b834e60008, negotiated timeout = 30000

WATCHER::

WatchedEventstate:SyncConnected type:None path:null

[zk: localhost:2181(CONNECTED)0]#

见到最后一行才算是成功。

测试

创建一个节点

[zk:localhost:2181(CONNECTED) 3] create /node helloword

Created /node

[zk:localhost:2181(CONNECTED) 4] ls /

[node, zookeeper]

获取节点

[zk:localhost:2181(CONNECTED) 8] get /node

helloword

cZxid = 0x17

ctime = Wed Nov 0217:17:25 CST 2016

mZxid = 0x17

mtime = Wed Nov 0217:17:25 CST 2016

pZxid = 0x17

cversion = 0

dataVersion = 0

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 9

numChildren = 0

设置节点

[zk:localhost:2181(CONNECTED) 9] set /node helloword!

cZxid = 0x17

ctime = Wed Nov 0217:17:25 CST 2016

mZxid = 0x1d

mtime = Wed Nov 0217:19:40 CST 2016

pZxid = 0x17

cversion = 0

dataVersion = 1

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 10

numChildren = 0

再次获取节点，看看变化：

[zk:localhost:2181(CONNECTED) 10] get /node

helloword!

cZxid = 0x17

ctime = Wed Nov 0217:17:25 CST 2016

mZxid = 0x1d

mtime = Wed Nov 0217:19:40 CST 2016

pZxid = 0x17

cversion = 0

dataVersion = 1

aclVersion = 0

ephemeralOwner = 0x0

dataLength = 10

numChildren = 0

测试删除节点：

[zk:localhost:2181(CONNECTED) 14] ls /

[node, zookeeper,test]

[zk:localhost:2181(CONNECTED) 15] delete /test

[zk:localhost:2181(CONNECTED) 16] ls /

[node, zookeeper]

配置集群

再搭建三个同样的虚拟环境，最简单的是直接clone上面的单机，不过要记住重新初始化网卡信息，具体的不再讲怎么操作了，有问题请直接留言。

修改zookeeper的参数：

# The number of

ticks that the initial

# synchronization

phase can take

initLimit=10

# The number of

ticks that can pass between

# sending a request

and getting an acknowledgement

syncLimit=5

server.1=192.168.1.156:2888:3888

server.2=192.168.1.158:2888:3888

server.3=192.168.1.159:2888:3888

端口说明：

2888：集群中服务器的通讯

3888：选领导

具体的测试就不再叙述，在搭建中遇到的问题，请参阅《zookeeper环境搭建中遇到的问题》

参考：http://www.ibm.com/developerworks/cn/opensource/os-cn-zookeeper/#ibm-pcon

(责任编辑：IT)

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