Hbase是运行在hadoop之上，所以请参考第3篇文章搭建好一个master，两个slave的hadoop环境，我采用的版本为hadoop2.7.4
不了解Hbase的同学可以参考下这篇文章，分析得相当深刻，感谢作者 http://blog.csdn.net/u010270403/article/details/51648462
为啥在安装Hbase前需要安装zookeeper？
1，hbase regionserver 向zookeeper注册，提供hbase regionserver状态信息（是否在线）
2，hmaster启动时候会将hbase 系统表-ROOT- 加载到 zookeeper cluster，通过zookeeper cluster可以获取当前系统表.META.的存储所对应的regionserver信息。
注意：zookeeper集群节点最少3台，这样才能满足选举规则，少数服从多数
忘了讲一个问题
集群中，所有节点的时间同步非常重要，所以要将所有节点的时间设置为一样，
当然，手动设置时间肯定不行，需要用到ntp来自动同步
#设置时区为上海 cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime #安装ntp yum -y install ntp # 同步时间 ntpdate pool.ntp.org #确认时间是否正确 date
现在master节点上配置，配置好后复制到两个slave节点就好了
wget http://mirror.bit.edu.cn/apache/zookeeper/current/zookeeper-3.4.10.tar.gz tar -zxvf zookeeper-3.4.10.tar.gz #进入conf目录 cp -p zoo_sample.cfg zoo.cfg #编辑cfg文件 vi zoo.cfg #内容修改为如下 # 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=master:2888:3888 server.2=slave1:2888:3888 server.3=slave2:2888:3888
#master echo "1" > /tmp/zookeeper/myid #slave1 echo "2" > /tmp/zookeeper/myid #slave2 echo "3" > /tmp/zookeeper/myid #启动 /home/zookeeper-3.4.10/bin/zkServer.sh start /home/zookeeper-3.4.10/conf/zoo.cfg #状态查看 [[email protected] conf]# /home/zookeeper-3.4.10/bin/zkServer.sh status ZooKeeper JMX enabled by default Using config: /home/zookeeper-3.4.10/bin/../conf/zoo.cfg Mode: follower [[email protected] conf]# #如果启动失败，查看日志 less zookeeper.out #停止服务 [[email protected] conf]# /home/zookeeper-3.4.10/bin/zkServer.sh stop ZooKeeper JMX enabled by default Using config: /home/zookeeper-3.4.10/bin/../conf/zoo.cfg Stopping zookeeper ... STOPPED [[email protected] conf]# jps 3589 Jps [[email protected] conf]#
找到leader节点，并停掉，你会发现刚开始为follower的某个节点又变为leader了
至此zookeeper配置完成
时间： 2024-12-09 11:26:35