Hbase集群启动流程

共有三个节点：hmaster、hslave1、hslave2，三个节点上都安装有: zookeeper、Hadoop、Hbase。

启动顺序:

zookeeper（每一台）-> Hadoop（主节点） -> Hbase（主节点）

1. 在三个节点上依次启动zookeeper。需要现切换到预先设置的hbase指定用户。
   [hbase@hmaster bin]$ ./zkServer.sh start

       JMX enabled by default
       Using config: /home/hbase/hb/zookeeper-3.4.5/bin/../conf/zoo.cfg
       Starting zookeeper ... STARTED
   

   三个节点会自动选举出来一个leader ,剩下的都是follower.

   [hbase@hmaster bin]$ ./zkServer.sh status

       JMX enabled by default
       Using config: /home/hbase/hb/zookeeper-3.4.5/bin/../conf/zoo.cfg
       Mode: follower
   

   [hbase@hmaster bin]$ jps

       1926 QuorumPeerMain
       2001 Jps
   

2. 在主节点启动Hadoop。

[hbase@hmaster bin]$ cd ../../hadoop-1.2.1/bin/
[hbase@hmaster bin]$ ./start-all.sh

starting namenode, logging to /home/hbase/hb/hadoop-1.2.1/libexec/../logs/hadoop-hbase-namenode-hmaster.out
hslave1: starting datanode, logging to /home/hbase/hb/hadoop-1.2.1/libexec/../logs/hadoop-hbase-datanode-hslave1.out
hslave2: starting datanode, logging to /home/hbase/hb/hadoop-1.2.1/libexec/../logs/hadoop-hbase-datanode-hslave2.out
hmaster: starting secondarynamenode, logging to /home/hbase/hb/hadoop-1.2.1/libexec/../logs/hadoop-hbase-secondarynamenode-hmaster.out
starting jobtracker, logging to /home/hbase/hb/hadoop-1.2.1/libexec/../logs/hadoop-hbase-jobtracker-hmaster.out
hslave2: starting tasktracker, logging to /home/hbase/hb/hadoop-1.2.1/libexec/../logs/hadoop-hbase-tasktracker-hslave2.out
hslave1: starting tasktracker, logging to /home/hbase/hb/hadoop-1.2.1/libexec/../logs/hadoop-hbase-tasktracker-hslave1.out

通过jps命令可以看到，主节点上启动了NameNode服务，而从节点上启动了DataNode服务
[hbase@hmaster bin]$ jps

2511 Jps
2082 NameNode
1926 QuorumPeerMain
2389 JobTracker
2280 SecondaryNameNode

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3.在主节点上启动Hbase

[hbase@hmaster bin]$ cd ../../hbase-0.94.27/bin/
[hbase@hmaster bin]$ ./start-hbase.sh

starting master, logging to /home/hbase/hb/hbase-0.94.27/bin/../logs/hbase-hbase-master-hmaster.out
hslave1: starting regionserver, logging to /home/hbase/hb/hbase-0.94.27/bin/../logs/hbase-hbase-regionserver-hslave1.out
hslave2: starting regionserver, logging to /home/hbase/hb/hbase-0.94.27/bin/../logs/hbase-hbase-regionserver-hslave2.out

通过jps可以查看到在主节点上启动了HMaster服务，而从节点上启动了HRegionServer服务。

2082 NameNode
1926 QuorumPeerMain
2389 JobTracker
2280 SecondaryNameNode
2665 HMaster
2804 Jps

4.如果要启动thrift接口，也需要在每个节点上开启thrift。
[hbase@hmaster bin]$ ./hbase-daemon.sh start thrift

starting thrift, logging to /home/hbase/hb/hbase-0.94.27/bin/../logs/hbase-hbase-thrift-hmaster.out

[hbase@hmaster bin]$ jps

2082 NameNode
1926 QuorumPeerMain
2389 JobTracker
2865 ThriftServer
2935 Jps
2280 SecondaryNameNode
2665 HMaster