zookeeper安装包：http://www-eu.apache.org/dist/zookeeper/stable/zookeeper-3.4.12.tar.gz
centos + java 运行环境，这里我分别准备三台centos虚拟机192.168.146.151，192.168.146.152，192.168.146.153
安装配置
解压zookeeper安装包，tar -zxvf zookeeper-3.4.12.tar.gz ,解压后目录
添加zookeeper配置，进入conf目录，使用cp zoo_sample.cfg zoo.cfg 复制zoo_sample.cfg为zoo.cfg
修改后配置
# 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=192.168.146.151:2188:3181 server.2=192.168.146.152:2188:3181 server.3=192.168.146.153:2188:3181主要配置说明
clientPort运行端口号
dataDir数据存储位置
myid设置
当安装zookeeper集群环境时要在dataDir目录下创建当前zookeeper的myid
如我在192.168.146.151机器上创建在/tmp/zookeeper/myid文件，文件内容为1，依次类推 。
添加server集群配置
server.1=192.168.146.151:2188:3181-->server.myid=ip:clientPort:prot，有几台机器添加几条配置 ，注意两个端口号不可以重复（如果重复会出现端口号重复的问题）,如上配置。
启动运行，进入每台机器zookeeper目录中的bin文件夹，运行zkServer.sh脚本，如 sh zkServer.sh start ,运行时可在启动目录下查看zookeeper.out 控制台日志。
启动好了可通过运行bin目录下的zkCli.sh脚本连接zookeeper，如
也可通过sh zkServer.sh status 查看当前zookeeper是什么角色
注：zookeeper 集群角色分为leader、follower、observer，这里我配置的只有leader和follower，要台添加一台observer机器，在server配置后面标记为observer如：server.4=192.168.146.154:2188:3181:observer
我的博客地址
