前言:zookeeper支持本机多个进程之间的集群,本文描述的是多个独立主机的分布式集群。
一、前提条件
至少需要3台独立主机(不管是虚拟机还是独立硬件)
因为zookeeper支持“大多数节点可用时的服务保障”,而1台和2台是无法满足“大多数节点可用”的条件的。
二、N(N>=3)台主机的配置
它们的配置文件是一样的,例如:
![复制代码](https://common.cnblogs.com/images/copycode.gif)
# 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=/tmp/zookeeper # 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 server.1=192.168.25.128:2888:3888 server.2=192.168.25.129:2888:3888 server.3=192.168.25.130:2888:3888
![复制代码](https://common.cnblogs.com/images/copycode.gif)
三、不一样的配置
1. 步骤二中的server.1中1指的是zookeeper的编号,需要根据配置定义每台机器编号。
2. 编号配置文件名称为myid,路径为步骤二中的配置项dataDir=/tmp/zookeeper指示的路径。
配置实例,在IP地址为192.168.25.128的主机上执行如下命令:
echo "1" >/tmp/zookeeper/myid
类似的配置其它主机。
四、启动服务
/usr/local/zookeeper-3.4.9/bin/zkServer.sh start
五、查看节点状态
./zkServer.sh status
能看到Mode: leader或者Mode: follower
顾名思义,就是主节点和从节点了。
做个测试,down掉主节点的机器,你会发现剩下的两个follower会有一个变成leader。
标签:tmp,配置,zookeeper,number,192.168,集群,节点 From: https://www.cnblogs.com/kn-zheng/p/17024868.html