zookeeper集群模式搭建

1.简介

zookeeper集群安装方式和单机方式很类似，基本的配置在这里就不细说了

不是很清楚的可以看zookeeper研究笔记（一）—— single模式搭建

主要是配置上的不同

2.配置

修改conf/zoo.cfg配置文件如下

# 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=/home/zookeeper/tmp/
# 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=namenode:2888:3888
server.2=datanode1:2888:3888
server.3=datanode2:2888:3888
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主要是增加这三行

server.1=namenode:2888:3888
server.2=datanode1:2888:3888
server.3=datanode2:2888:3888
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符合如下规则

server.id=host:port1:port2
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id是zookeeper集群各服务器的的id，host是各服务器ip或者主机名，


port1是各服务器交互信息的端口，port2是当集群中的leader挂掉后重新选举的端口

配置好后可以通过rsync或者scp拷贝到其他服务器

各个服务器id是由myid文件指定，myid需要自己创建，文件只含一个数字，即id，范围为1-255

myid文件路径为zoo.cfg里的dataDir目录

3.效果

如果看到下图，证明你已经成功了。