zookeeper环境构建

最新推荐文章于 2023-03-03 21:20:16 发布

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本文详细介绍如何在三台服务器上部署ZooKeeper集群，包括JDK安装、环境变量配置、主机名设置、ZooKeeper安装及配置文件修改等关键步骤。

关于zookeeper的作用这里不再作详述，相信很多开发人员在很多场景都使用zookeeper作为任务协调。

1、安装jdk(这里不述详述)

下载jdk压缩包，并在/etc/profile中增加相关的环境变量配置：

export JAVA_HOME=/usr/java/jdk1.8.0_121/

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export PATH=$JAVA_HOME/bin:$PATH

2、zookeeper安装包下载

http://zookeeper.apache.org/

3、服务列表

服务器：

172.25.226.126

172.25.226.229

172.25.226.246

以下操作每台服务器都需要执行相同的操作：

将hostname（/etc/hostname）分别设置为：

work01

work02

work03

增加ip地址与hostname之前映射关系，在每台服务器的/etc/hosts中增加：

172.25.226.126 work01

172.25.226.229 work02

172.25.226.246 work03

注意：在日常使用中，将zookeeper服务个数设为奇数（3、5、7），这也是官网建议的设置。

4、配置文件的修改

下载zookeeper压缩包，我下载的版本为3.4.9，解压到/opt/zookeeper/目录下

cd /opt/zookeeper/zookeeper-3.4.9/conf目录下

cp zoo_sample.cfg zoo.cfg

将zoo.cfg内容修改如下：

# 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/zkdata

dataLogDir=/opt/zookeeper/zkdatalog

# the port at which the clients will connect

clientPort=12181

# 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

#server.1=172.25.226.126:12888:13888

server.1=work01:12888:13888

server.2=work02:12888:13888

server.3=work03:12888:13888

由于数据及日志文件放在/opt/zookeeper目录下的zkdata和zkdatalog下面，因而需要建立此两个文件夹

下面的操作是每台机单独操作：

#work01

echo "1" > /opt/zookeeper/zkdata/myid

#work02

echo "2" > /opt/zookeeper/zkdata/myid

#work03

echo "3" > /opt/zookeeper/zkdata/myid

5、启动zookeeper服务

接着进入到/opt/zookeeper/zookeeper-3.4.9/bin/目录下，执行./zkServer.sh start

可以通过./zkServer.sh status查看将状及./zkServer.sh stop停止服务

hadoop@work01:/opt/zookeeper/zookeeper-3.4.9/bin$ ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
Mode: follower

hadoop@work02:/opt/zookeeper/zookeeper-3.4.9/bin$ ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
Mode: leader

hadoop@work03:/opt/zookeeper/zookeeper-3.4.9/bin$ ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/zookeeper-3.4.9/bin/../conf/zoo.cfg
Mode: follower