############# zookeeper env #################

 export ZOOKEEPER_HOME=/usr/local/zookeeper

 export PATH=$JAVA_HOME/bin:$ZOOKEEPER_HOME/bin:$PATH

 [root@hadoop1 conf]# cd /usr/local/zookeeper/conf

 [root@hadoop1 conf]# cp zoo_sample.cfg zoo.cfg

 [root@hadoop1 conf]# vim zoo.cfg                        最后追加

 server.=hadoop1::

 server.=hadoop2::

 server.=hadoop3::

 [root@hadoop1 conf]# mkdir -p /tmp/zookeeper            # 所有机器，创建指定的dataDir

 [root@hadoop1 conf]# touch /tmp/zookeeper/myid            # 所有机器,/tmp/zookeeper是刚才zoo.cfg里指定的dataDir，如果变更了这里也要变

 [root@hadoop1 conf]# echo "">/tmp/zookeeper/myid        # 所有机器操作，与zoo.cfg最后追加的对应，hadoop2为2，hadoop3为3

 [root@hadoop1 conf]# vim log4j.properties

 zookeeper.root.logger=INFO, CONSOLE变更为zookeeper.root.logger=INFO, ROLLINGFILE

 log4j.appender.ROLLINGFILE=org.apache.log4j.RollingFileAppender变更为log4j.appender.ROLLINGFILE=org.apache.log4j.DailyRollingFileAppender

 [root@hadoop1 conf]# vim ../bin/zkEnv.sh

 ZOO_LOG4J_PROP="INFO,CONSOLE"变更为ZOO_LOG4J_PROP="INFO,ROLLINGFILE"

 [root@hadoop1 local]# scp -rp zookeeper/ hadoop2:/usr/local/

 [root@hadoop1 local]# scp -rp zookeeper/ hadoop3:/usr/local/

 [root@hadoop1 conf]# zkServer.sh start                    # 所有机器

 [root@hadoop1 conf]# jps

  Jps

  QuorumPeerMain

 [root@hadoop1 conf]# zkServer.sh status

 ZooKeeper JMX enabled by default

 Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg

 Client port found: . Client address: localhost.

 Mode: follower                                            # 会有一台是leader，剩下都是follower，因为zookeeper是完全对等的，所以不一定是当前操作的hadoop1就是leader