清理ambari安装的hadoop集群
本文针对redhat或者centos
对于测试集群，如果通过ambari安装Hadoop集群后，想重新再来一次的话，需要清理集群。
对于安装了很多hadoop组件的话，这个工作很繁琐。接下来是我整理的清理过程。
1，通过ambari将集群中的所用组件都关闭，如果关闭不了，直接kill -9 XXX
2，关闭ambari-server，ambari-agent
- ambari-server stop
- ambari-agent stop
3，卸载安装的软件
- yum remove hadoop_2* hdp-select* ranger_2* zookeeper_* bigtop* atlas-metadata* ambari* postgresql spark* slider* storm* snappy*
以上命令可能不全，执行完一下命令后，再执行
- yum list | grep @HDP
查看是否还有没有卸载的，如果有，继续通过#yum remove XXX卸载
4，删除postgresql的数据
postgresql软件卸载后，其数据还保留在硬盘中，需要把这部分数据删除掉，如果不删除掉，重新安装ambari-server后，有可能还应用以前的安装数据，而这些数据时错误数据，所以需要删除掉。
- rm -rf /var/lib/pgsql
5，删除用户
ambari安装hadoop集群会创建一些用户，清除集群时有必要清除这些用户，并删除对应的文件夹。这样做可以避免集群运行时出现的文件访问权限错误的问题。
- userdel oozie
- userdel hive
- userdel ambari-qa
- userdel flume
- userdel hdfs
- userdel knox
- userdel storm
- userdel mapred
- userdel hbase
- userdel tez
- userdel zookeeper
- userdel kafka
- userdel falcon
- userdel sqoop
- userdel yarn
- userdel hcat
- userdel atlas
- userdel spark
- userdel ams
- rm -rf /home/atlas
- rm -rf /home/accumulo
- rm -rf /home/hbase
- rm -rf /home/hive
- rm -rf /home/oozie
- rm -rf /home/storm
- rm -rf /home/yarn
- rm -rf /home/ambari-qa
- rm -rf /home/falcon
- rm -rf /home/hcat
- rm -rf /home/kafka
- rm -rf /home/mahout
- rm -rf /home/spark
- rm -rf /home/tez
- rm -rf /home/zookeeper
- rm -rf /home/flume
- rm -rf /home/hdfs
- rm -rf /home/knox
- rm -rf /home/mapred
- rm -rf /home/sqoop
6，删除ambari遗留数据
- rm -rf /var/lib/ambari*
- rm -rf /usr/lib/python2.6/site-packages/ambari_*
- rm -rf /usr/lib/python2.6/site-packages/resource_management
- rm -rf /usr/lib/ambri-*
7，删除其他hadoop组件遗留数据
rm -rf /etc/falcon
rm -rf /etc/knox
rm -rf /etc/hive-webhcat
rm -rf /etc/kafka
rm -rf /etc/slider
rm -rf /etc/storm-slider-client
rm -rf /etc/spark
rm -rf /var/run/spark
rm -rf /var/run/hadoop
rm -rf /var/run/hbase
rm -rf /var/run/zookeeper
rm -rf /var/run/flume
rm -rf /var/run/storm
rm -rf /var/run/webhcat
rm -rf /var/run/hadoop-yarn
rm -rf /var/run/hadoop-mapreduce
rm -rf /var/run/kafka
rm -rf /var/log/hadoop
rm -rf /var/log/hbase
rm -rf /var/log/flume
rm -rf /var/log/storm
rm -rf /var/log/hadoop-yarn
rm -rf /var/log/hadoop-mapreduce
rm -rf /var/log/knox
rm -rf /usr/lib/flume
rm -rf /usr/lib/storm
rm -rf /var/lib/hive
rm -rf /var/lib/oozie
rm -rf /var/lib/flume
rm -rf /var/lib/hadoop-hdfs
rm -rf /var/lib/knox
rm -rf /var/log/hive
rm -rf /var/log/oozie
rm -rf /var/log/zookeeper
rm -rf /var/log/falcon
rm -rf /var/log/webhcat
rm -rf /var/log/spark
rm -rf /var/tmp/oozie
rm -rf /tmp/ambari-qa
rm -rf /var/hadoop
rm -rf /hadoop/falcon
rm -rf /tmp/hadoop
rm -rf /tmp/hadoop-hdfs
rm -rf /usr/hdp
rm -rf /usr/hadoop
rm -rf /opt/hadoop
rm -rf /opt/hadoop2
rm -rf /tmp/hadoop
rm -rf /var/hadoop
rm -rf /hadoop
rm -rf /etc/ambari-metrics-collector
rm -rf /etc/ambari-metrics-monitor
rm -rf /var/run/ambari-metrics-collector
rm -rf /var/run/ambari-metrics-monitor
rm -rf /var/log/ambari-metrics-collector
rm -rf /var/log/ambari-metrics-monitor
rm -rf /var/lib/hadoop-yarn
rm -rf /var/lib/hadoop-mapreduce
8，清理yum数据源