Zookeeper 分布式环境搭建

时间：2023-03-09 15:31:05
Zookeeper 分布式环境搭建

一、前期环境

  • 安装概览
IP Host Name     Software    
192.168.23.128     ae01 JDK 1.7
192.168.23.129 ae02 JDK 1.7
192.168.23.130 ae03 JDK 1.7
    若使用虚拟机安装，可以安装samba, smbfs方便对于文件的控制。
  • 系统环境： ubuntu-12.04.2-server-amd64
  • 安装目录： /usr/local/ae
  • JDK 安装目录： export JAVA_HOME=/usr/local/ae/jdk1.7.0_51
  • Zookeeper版本： zookeeper-3.4.5

二、Zookeeper 安装

  • 修改host文件，添加3台服务器的hostname， 以ae01 为例。 
    user@ae01:/usr/local/ae$ sudo vim /etc/hosts
    127.0.0.1         localhost
    
192.168.23.128    ae01
    
192.168.23.129    ae02
    
192.168.23.129    ae03
  • 解压zookeeper-3.4.5.tar.gz 到/usr/local/ae 目录 
    user@ae01:/usr/local/ae$ sudo tar -zxvf zookeeper-3.4.5.tar.gz
  • 复制$ZOOKEEPER_HOME/conf/zoo_sample.cfg 为zoo.cfg 并修改 
    user@ae01:/usr/local/ae/zookeeper-3.4./conf$ sudo vm zoo_sample.cfg zoo.cfg
  • 修改zoo.cfg 
    # The number of milliseconds of each tick
    
tickTime=2000
    
# The number of ticks that the initial
    
# synchronization phase can take
    
initLimit=5
    
# The number of ticks that can pass between
    
# sending a request and getting an acknowledgement
    
syncLimit=2
    
# the directory where the snapshot is stored.
    
# do not use /tmp for storage, /tmp here is just
    
# example sakes.
    
dataDir=/usr/local/ae/storage/zookeeper
    
# the port at which the clients will connect
    
clientPort=2181
    
#
    
# 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=ae01:2888:3888
    
server.2=ae02:2888:3888
    
server.3=ae03:2888:3888
    dataDir 为Zookeeper保存数据的文件夹
    server.1=ae01:2888:3888 '2888'为连接所使用的端口号，'3888'为选举leader使用的端口号
  • 复制zookeeper-3.4.5 到ae02，ae03 
    user@ae01:/usr/local/ae$ scp -r zookeeper-3.3.5/ user@ae01:/usr/local/ae
    
user@ae01:/usr/local/ae$ scp -r zookeeper-3.3.5/ user@ae02:/usr/local/ae
  • 设置myid 
    user@ae01:/usr/local/ae$ echo "" > /usr/local/ae/storage/zookeeper/myid
    
user@ae02:/usr/local/ae$ echo "" > /usr/local/ae/storage/zookeeper/myid
    
user@ae03:/usr/local/ae$ echo "" > /usr/local/ae/storage/zookeeper/myid

    myid的值对应着上文中 server.x 的参数

三、启动Zookeeper 集群

  • 启动Zookeeper 
    user@ae01:/usr/local/ae/zookeeper-3.4.5/bin$ sudo zkServer.sh start
    
user@ae02:/usr/local/ae/zookeeper-3.4.5/bin$ sudo zkServer.sh start
    
user@ae03:/usr/local/ae/zookeeper-3.4.5/bin$ sudo zkServer.sh start

    由于ZooKeeper集群启动的时候，每个结点都试图去连接集群中的其它结点，先启动的肯定连不上后面还没启动的，日志前面部分出现连接异常（java.net.ConnectException: Connection refused ）是可以忽略的。集群在选出一个Leader后，最后稳定了。

  • 验证启动 
    user@ae01:/usr/local/ae/zookeeper-3.4.5/bin$ zkServer.sh status
    
JMX enabled by default
    
Using config: /usr/local/ae/zookeeper-3.4.5/bin/../conf/zoo.cfg
    
Mode: leader
    user@ae02:/usr/local/ae/zookeeper-3.4.5/bin$ zkServer.sh status
    
JMX enabled by default
    
Using config: /usr/local/ae/zookeeper-3.4.5/bin/../conf/zoo.cfg
    
Mode: follower
    user@ae03:/usr/local/ae/zookeeper-3.4.5/bin$ zkServer.sh status
    
JMX enabled by default
    
Using config: /usr/local/ae/zookeeper-3.4.5/bin/../conf/zoo.cfg
    
Mode: follower

四、文档参考

  • http://zookeeper.apache.org/doc/trunk/zookeeperOver.html

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