zookeeper （伪）集群模式的安装

1）下载

wget http://mirrors.cnnic.cn/apache/zookeeper/zookeeper-3.4.6/zookeeper-3.4.6.tar.gz

2）解压

tar zxvf zookeeper-3.4.6.tar.gz

3）配置

cd zookeeper-3.4.6
cp -rf conf/zoo_sample.cfg conf/zoo.cfg
vim conf/zoo.cfg
zoo.cfg:
# 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.
#用于存放数据快照的文件夹，同事用于集群标识 ID 的 myid 文件也放在这儿（一个配置文件只能包含一个 dataDir，即使它被注释掉了）
dataDir=/usr/local/zooDataDir1
dataLogDir=/usr/local/zooDataLogDir
# the port at which the clients will connect，服务端口
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
# zookeeper 集群中的每两台机器都是互连的
# 以下是集群其他服务的配置，格式： server.服务器ID=服务器IP:端口1:端口2
server.1=localhost:2888:3888
server.2=localhost:12888:13888
server.3=localhost:22888:23888
# 其中，端口1用来主动连接其他机器，端口2用来接受其他机器的连接，共同使zookeeper集群融为一体
# 服务器ID，在 dataDir（前面的一个配置项）这个目录下新建一个 myid 的文件，文件内容分别是 1，2，3。。。

4）启动zookeeper

依次启动每个节点： 
sh zkServer.sh start

5）进入zookeeper

sh zkCli.sh 

6）Java客户端的连接地址

localhost:2181,localhost:12181,localhost:22181