Zookeeper安装、集群配置

Zookeeper安装

官网下载地址：https://zookeeper.apache.org/releases.html

1. Linux服务器wget命令下载：

   windows直接解压设置配置文件然后运行

   #版本号去官网选择自己下载的版本，本地电脑下载再上传也可，随便
   wget https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-3.5.9/apache-zookeeper-3.5.9-bin.tar.gz
   #未安装wget，yum安装
   yum install wget -y
   

   #tar命令解压
   tar -zxvf apache-zookeeper-3.5.9-bin.tar.gz
   

2. 编辑配置文件

   到解压出来zookeeper目录下的conf目录下，创建配置文件zoo.cfg

   #复制zookeeper提供的配置文件样例，改为正确的配置文件名称
   cp zoo_sample.cfg zoo.cfg
   

   配置文件中指定数据存储目录和日志目录（不指定用默认的建议指定）

   #数据存储目录
   dataDir=/usr/local/zookeeper/apache-zookeeper-3.5.9-bin/data
   #日志目录
   dataLogDir=/usr/local/zookeeper/apache-zookeeper-3.5.9-bin/logs
   #zookeeper提供了自动清理事务日志和快照文件的功能，指定频率，单位小时，1小时
   autopurge.snapRetainCount=1
   

3. 启动zookeeper

   zookkeeper安装目录bin目录下执行命令

   #bin目录下执行
   ./zkServer.sh start
   #查看zookeeper状态
   ./zkServer.sh status
   #停止zookeeper
   ./zkServer.sh stop
   #重启zookeeper
   ./zkServer.sh restart
   

Zookeeper集群

1. 添加myid配置，设置集群中每个服务器的ID

   在zookeeper的data目录下创建一个myid的文件记录服务器的id，内容为1表示这个zookeeper服务器id为1（每个都创建不要重复）

   # >的意思是将输出的内容不输出到控制台输出到文件，文件不存在自动创建，一个>是覆盖内容，两个>>是追加内容，每个服务唯一
   echo 1 > myid
   

2. 配置文件中添加集群结点信息

   确保用到的端口打开或者关闭防火墙

   #增加集群配置，最好奇数集群
   #server.服务器ID=服务器IP地址:服务器之间通信端口:服务器直接投票选举端口
   server.1={server.ip}:{server.port1}:{server.port2}
   server.2={server.ip}:{server.port1}:{server.port2}
   

   查看集群效果Leader，显示 Mode: leader

   ZooKeeper JMX enabled by default
   Using config: /usr/local/zookeeper/apache-zookeeper-3.5.9-bin/bin/../conf/zoo.cfg
   Client port found: 2181. Client address: localhost. Client SSL: false.
   Mode: leader
   

Zookeeper配置文件

# 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=/usr/local/zookeeper/apache-zookeeper-3.5.9-bin/data
dataLogDir=/usr/local/zookeeper/apache-zookeeper-3.5.9-bin/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
server.1=192.168.136.133:2888:3888
server.2=192.168.136.132:2888:3888
#
# 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