系统版本：CentOS Linux release 8.3.2011
JDK版本：1.8
Zookpeer版本：3.7.0
此次搭建的集群为伪集群，即在一台机器上开3个实例。
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下载安装包
[root@i-h0xe1oiq tools]# wget https://dlcdn.apache.org/zookeeper/zookeeper-3.7.0/apache-zookeeper-3.7.0-bin.tar.gz -
解压安装包
[root@i-h0xe1oiq tools]# tar xf apache-zookeeper-3.7.0-bin.tar.gz -C /application/ -
查看解压后的目录
[root@i-h0xe1oiq apache-zookeeper-3.7.0-bin]# tree -L 1 . ├── bin ├── conf ├── docs ├── lib ├── LICENSE.txt ├── NOTICE.txt ├── README.md └── README_packaging.md 4 directories, 4 files -
准备配置文件，进入conf目录，创建zoo.cfg文件，内容可复制conf/zoo_sample.cfg。
[root@i-h0xe1oiq conf]# cp zoo_sample.cfg zoo.cfg -
配置文件说明
# The number of milliseconds of each tick tickTime=2000 # CS通信心跳数，Zookeeper 服务器之间或客户端与服务器之间维持心跳的时间间隔，也就是每个 tickTime 时间就会发送一个心跳。tickTime以毫秒为单位。 # The number of ticks that the initial # synchronization phase can take initLimit=10 # LF初始通信时限，集群中的follower服务器(F)与leader服务器(L)之间初始连接时能容忍的最多心跳数（tickTime的数量）。 # The number of ticks that can pass between # sending a request and getting an acknowledgement syncLimit=5 # LF同步通信时限，集群中的follower服务器与leader服务器之间请求和应答之间能容忍的最多心跳数（tickTime的数量）。 # the directory where the snapshot is stored. # do not use /tmp for storage, /tmp here is just # example sakes. dataDir=/tmp/zookeeper # 数据文件目录，Zookeeper保存数据的目录，默认情况下，Zookeeper将写数据的日志文件也保存在这个目录里。 # the port at which the clients will connect clientPort=2181 # 客户端连接端口，客户端连接 Zookeeper 服务器的端口，Zookeeper 会监听这个端口，接受客户端的访问请求。 # 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 ## Metrics Providers # # https://prometheus.io Metrics Exporter #metricsProvider.className=org.apache.zookeeper.metrics.prometheus.PrometheusMetricsProvider #metricsProvider.httpPort=7000 #metricsProvider.exportJvmInfo=true # 服务器名称与地址：集群信息（服务器编号，服务器地址，LF通信端口，选举端口） # 这个配置项的书写格式比较特殊，规则如下： # server.N=YYY:A:B # 其中N表示服务器编号，YYY表示服务器的IP地址，A为LF通信端口，表示该服务器与集群中的leader交换的信息的端口。B为选举端口，表示选举新leader时服务器间相互通信的端口（当leader挂掉时，其余服务器会相互通信，选择出新的leader）。一般来说，集群中每个服务器的A端口都是一样，每个服务器的B端口也是一样。但是当所采用的为伪集群时，IP地址都一样，只能时A端口和B端口不一样。 -
伪集群准备三份zookeeper实例
[root@i-h0xe1oiq application]# ll -h total 12K drwxr-xr-x 17 cloud-user cloud-user 4.0K Mar 17 2021 apache-zookeeper-3.7.0-2181 drwxr-xr-x 17 root root 4.0K Oct 25 14:54 apache-zookeeper-3.7.0-2182 drwxr-xr-x 17 root root 4.0K Oct 25 14:54 apache-zookeeper-3.7.0-2183 -
各实例配置文件
# 实例1 tickTime=2000 initLimit=10 syncLimit=5 dataDir=/application/apache-zookeeper-3.7.0-2181/data clientPort=2181 server.1=127.0.0.1:12888:13888 server.2=127.0.0.1:14888:15888 server.3=127.0.0.1:16888:17888 # 实例2 tickTime=2000 initLimit=10 syncLimit=5 dataDir=/application/apache-zookeeper-3.7.0-2182/data clientPort=2182 server.1=127.0.0.1:12888:13888 server.2=127.0.0.1:14888:15888 server.3=127.0.0.1:16888:17888 # 实例3 tickTime=2000 initLimit=10 syncLimit=5 dataDir=/application/apache-zookeeper-3.7.0-2183/data clientPort=2183 server.1=127.0.0.1:12888:13888 server.2=127.0.0.1:14888:15888 server.3=127.0.0.1:16888:17888 -
配置实例ID以区分
# 实例1 [root@i-h0xe1oiq application]# mkdir -p apache-zookeeper-3.7.0-2181/data/ && echo 1 > apache-zookeeper-3.7.0-2181/data/myid # 实例2 [root@i-h0xe1oiq application]# mkdir -p apache-zookeeper-3.7.0-2182/data/ && echo 2 > apache-zookeeper-3.7.0-2182/data/myid # 实例3 [root@i-h0xe1oiq application]# mkdir -p apache-zookeeper-3.7.0-2183/data/ && echo 3 > apache-zookeeper-3.7.0-2183/data/myid -
启动节点
[root@i-h0xe1oiq application]# ./apache-zookeeper-3.7.0-2181/bin/zkServer.sh start ZooKeeper JMX enabled by default Using config: /application/apache-zookeeper-3.7.0-2181/bin/../conf/zoo.cfg Starting zookeeper ... STARTED [root@i-h0xe1oiq application]# ./apache-zookeeper-3.7.0-2182/bin/zkServer.sh start ZooKeeper JMX enabled by default Using config: /application/apache-zookeeper-3.7.0-2182/bin/../conf/zoo.cfg Starting zookeeper ... STARTED [root@i-h0xe1oiq application]# ./apache-zookeeper-3.7.0-2183/bin/zkServer.sh start ZooKeeper JMX enabled by default Using config: /application/apache-zookeeper-3.7.0-2183/bin/../conf/zoo.cfg Starting zookeeper ... STARTED -
查看节点状态
[root@i-h0xe1oiq application]# ./apache-zookeeper-3.7.0-2181/bin/zkServer.sh status ZooKeeper JMX enabled by default Using config: /application/apache-zookeeper-3.7.0-2181/bin/../conf/zoo.cfg Client port found: 2181. Client address: localhost. Client SSL: false. Mode: follower [root@i-h0xe1oiq application]# ./apache-zookeeper-3.7.0-2182/bin/zkServer.sh status ZooKeeper JMX enabled by default Using config: /application/apache-zookeeper-3.7.0-2182/bin/../conf/zoo.cfg Client port found: 2182. Client address: localhost. Client SSL: false. Mode: leader [root@i-h0xe1oiq application]# ./apache-zookeeper-3.7.0-2183/bin/zkServer.sh status ZooKeeper JMX enabled by default Using config: /application/apache-zookeeper-3.7.0-2183/bin/../conf/zoo.cfg Client port found: 2183. Client address: localhost. Client SSL: false. Mode: follower