zookeeper的cluster最少要三个节点：

       建立三个配置文件： 主要是dataDir, clientPort不一样

configs/zoo1.conf

# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial # synchronization phase can takeinitLimit=10# The number of ticks that can pass between # sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.# do not use /tmp for storage, /tmp here is just # example sakes.dataDir=datas/data1/# the port at which the clients will connectclientPort=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=1server.1=127.0.0.1:2888:3888server.2=127.0.0.1:4888:5888server.3=127.0.0.1:6888:7888

 configs/zoo2.conf

# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial # synchronization phase can takeinitLimit=10# The number of ticks that can pass between # sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.# do not use /tmp for storage, /tmp here is just # example sakes.dataDir=datas/data2/# the port at which the clients will connectclientPort=2182# 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=1server.1=127.0.0.1:2888:3888server.2=127.0.0.1:4888:5888server.3=127.0.0.1:6888:7888

 configs/zoo3.conf

# The number of milliseconds of each ticktickTime=2000# The number of ticks that the initial # synchronization phase can takeinitLimit=10# The number of ticks that can pass between # sending a request and getting an acknowledgementsyncLimit=5# the directory where the snapshot is stored.# do not use /tmp for storage, /tmp here is just # example sakes.dataDir=datas/data3/# the port at which the clients will connectclientPort=2183# 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=1server.1=127.0.0.1:2888:3888server.2=127.0.0.1:4888:5888server.3=127.0.0.1:6888:7888

启动命令：

   在zookeeper根目录执行

java -cp .;zookeeper-3.4.8.jar;lib/*  org.apache.zookeeper.server.quorum.QuorumPeerMain configs/zoo1.conf

java -cp .;zookeeper-3.4.8.jar;lib/*  org.apache.zookeeper.server.quorum.QuorumPeerMain configs/zoo2.conf

java -cp .;zookeeper-3.4.8.jar;lib/*  org.apache.zookeeper.server.quorum.QuorumPeerMain configs/zoo3.conf

PS:  mac上的 启动命令  ;替换成 :

创建datas/data1   datas/data2   datas/data3目录 ，并在三个目录中放置myid文件，内容分别为1  2  3