5分钟入门Zookeeper集群配置

安装包解压，复制配置文件

# 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=/tmp/zookeeper（临时目录，正式环境要修改）
# 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=192.168.23.100:2888:3888（前一个端口用于leader和follower通信，后一个执行选举Leader服务器时通信）
server.2=192.168.23.101:2888:3888
server.3=192.168.23.102:2888:3888

分发到三台机子上，

 在上面的datadir目录下（没有对应文件夹自己创建），创建myid文件 写入机器编号，也就是192.168.23.100写1，192.168.23.101写2，192.168.23.102写3,然后到bin目录下启动

./zkServer.sh start

三台都是这样。然后jps查看线程

./zkServer.sh status

查看状态

 

杀死是leader 的线程发现又选出一个leader。zookeep整个集群机子要多于半数才能正常运行，或者整个集群就挂掉。集群一开始的机子数量要是奇数个才能选举。把杀掉线程的机子重启，还会同步新的数据，成为follower。

./zkCli.sh -server slave1:2181

启动客户端访问某节点操作