zookeeper安装和配置

zookeeper版本：zookeeper-3.4.5-cdh5.0.0-beta-1.tar.gz

服务器：
      10.95.3.100  master1
      10.95.3.103  slave1
      10.95.3.104  slave1

1、解压zookeeper-3.4.5-cdh5.0.0-beta-1.tar.gz，进入zookeeper/conf目录下，复制一份zoo_sample.cfg (cp zoo_sample.cfg zoo.cfg)，改名为zoo.cfg。

2、修改conf/zoo.cfg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=/dp/zookeeper_dataDir
# the port at which the clients will connect
clientPort=2181
server.1=master1:2888:3888
server.2=slave1:2888:3888
server.3=slave2:2888:3888
#
# 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

3、将修改好的zookeeper安装文件scp到其他两台机器上去

4、在每台机器上创建/dp/zookeeper_dataDir文件，这是zoo.cfg dataDir的配置，在该文件夹下创建myid文件，文件内容每台机器上分别为1 2 3

5、vi ~/.bashrc 设置zookeeper环境变量
   export ZOOKEEPER_HOME=/dp/zookeeper
   path=$ZOOKEEPER_HOME/bin

6、在每台机器上执行zkServer.sh start 启动zookeeper