开机时监听Hadoop和Zookpeer启动之后再启动Hbase

 Hbase的启动依赖于Hadoop和Zookpeer，必须保证先于它们启动才行。在本地调试每次都要重启三个软件非常麻烦。所以写个脚本hbaseStart.sh来解决这个问题

#!/bin/sh

#定义等号的两侧不能有空格
hbaseStart=false


while [ true ]
do

        QuoPM=`jps | grep "QuorumPeerMain"`
        NameNode=`jps | grep "NameNode"`
        DataNode=`jps | grep "DataNode"`


        #if的[  ]判断两边均需要有个空格
        if [ -n "$NameNode" ] &&  [ -n "$DataNode" ] &&  [ -n "$QuoPM" ] && [ "$hbaseStart" = false ]
        then
                  echo "hadoop和zookper启动完毕开始启动hbase..."
                  hbaseStart=true
                  sh /opt/modules/cdh/hbase-0.98.6-cdh5.3.6/bin/start-hbase.sh

        elif [ "$hbaseStart" = true ]
        then
             echo "结束hbase启动的探测..."
             break
        fi

        sleep 0.5

done

vi /etc/rc.local

su - hadoop -c '/usr/local/zookeeper-3.4.6/bin/zkServer.sh start'
su - hadoop -c '/opt/modules/cdh/hadoop-2.5.0-cdh5.3.6/sbin/start-dfs.sh'
su - hadoop -c '/opt/modules/cdh/hadoop-2.5.0-cdh5.3.6/sbin/start-yarn.sh'
/usr/local/shell/hbaseStart.sh

参考链接
https://blog.csdn.net/hexinli/article/details/53040257
https://blog.csdn.net/henni_719/article/details/53674024
https://blog.csdn.net/SunXiWang/article/details/78637746