一键式完全删除CDH 6.3.0脚本

一键式完全删除CDH 6.3.0脚本

CDH集群的安装部署虽然步骤比较多，但只要严格按照文档操作，一般不会有太大问题。然而，如果安装过程中出错，或因为其它原因需要重新安装CDH，在不重装操作系统的前提下，是比较困难的。难点在于需要删除的东西太多，删除不干净非常容易造成安装失败。网上找的所谓“CDH完全卸载”其实都不够完全。经过一天的反复尝试，终于写了一个一键式删除CDH脚本，在我自己的测试环境下是可行的。删除脚本文件remove_cloudera.sh内容如下：

#!/bin/bash # 停止CM服务systemctl stop cloudera-scm-serversystemctl stop cloudera-scm-agent  # 卸载CM软件包yum -y remove cloudera-manager-daemons cloudera-manager-agent cloudera-manager-server # 卸载装载点umount cm_processesumount cm_processesumount cm_processes # 删除文件rm -rf /var/log/*rm -rf /opt/cloudera*rm -rf /etc/systemd/system/multi-user.target.wants/cloudera*rm -rf /etc/default/cloudera*rm -rf /etc/cloudera*rm -rf /var/lib/cloudera*rm -rf /var/log/cloudera*rm -rf /usr/lib/systemd/system/cloudera*rm -rf /run/cloudera*rm -rf /sys/fs/cgroup/systemd/system.slice/cloudera*rm -rf /etc/security/limits.d/cloudera*rm -rf /var/lib/yum/repos/x86_64/7/cloudera*rm -rf /var/cache/yum/x86_64/7/cloudera*rm -rf /tmp/* rm -rf /var/lib/hadoop-* rm -rf /var/lib/impala rm -rf /var/lib/solr rm -rf /var/lib/zookeeper rm -rf /var/lib/hue rm -rf /var/lib/oozie rm -rf /var/lib/pgsql rm -rf /var/lib/sqoop2 rm -rf /data/dfs/  rm -rf /data/impala/ rm -rf /data/yarn/  rm -rf /dfs/ rm -rf /impala/ rm -rf /yarn/  rm -rf /var/run/hadoop-*/ rm -rf /var/run/hdfs-*/ rm -rf /usr/bin/hadoop* rm -rf /usr/bin/zookeeper* rm -rf /usr/bin/hbase* rm -rf /usr/bin/hive* rm -rf /usr/bin/hdfs rm -rf /usr/bin/mapred rm -rf /usr/bin/yarn rm -rf /usr/bin/sqoop* rm -rf /usr/bin/oozie rm -rf /etc/hadoop* rm -rf /etc/zookeeper* rm -rf /etc/hive* rm -rf /etc/hue rm -rf /etc/impala rm -rf /etc/sqoop* rm -rf /etc/oozie rm -rf /etc/hbase* rm -rf /etc/hcatalog  rm -rf /var/lib/alternatives/impala-confrm -rf /var/lib/alternatives/impaladrm -rf /var/lib/alternatives/impala-collect-diagnosticsrm -rf /var/lib/alternatives/impala-shellrm -rf /var/lib/alternatives/impala-collect-minidumps rm -rf /etc/alternatives/impala-shellrm -rf /etc/alternatives/impaladrm -rf /etc/alternatives/impala-collect-diagnosticsrm -rf /etc/alternatives/impala-confrm -rf /etc/alternatives/impala-collect-minidumps rm -rf /var/log/impala* rm -rf /var/lib/alternatives/zookeeper-clientrm -rf /var/lib/alternatives/zookeeper-serverrm -rf /var/lib/alternatives/zookeeper-confrm -rf /var/lib/alternatives/zookeeper-server-initializerm -rf /var/lib/alternatives/zookeeper-server-cleanuprm -rf /var/lib/alternatives/zookeeper-security-migration rm -rf /etc/alternatives/zookeeper-confrm -rf /etc/alternatives/zookeeper-serverrm -rf /etc/alternatives/zookeeper-server-cleanuprm -rf /etc/alternatives/zookeeper-server-initializerm -rf /etc/alternatives/zookeeper-security-migrationrm -rf /etc/alternatives/zookeeper-clientrm -rf /var/log/zookeeper # 重建数据库mysql -uroot -p123456 -e "drop database if exists scm;drop database if exists hive;drop database if exists oozie;drop database if exists hue;create database scm DEFAULT CHARACTER SET utf8;create database hive DEFAULT CHARACTER SET utf8;create database oozie DEFAULT CHARACTER SET utf8;create database hue DEFAULT CHARACTER SET utf8;" # 删除用户和组userdel -r cloudera-scmuserdel -r ambari-qa  userdel -r appmon  userdel -r falcon  userdel -r gpadmin  userdel -r hcat  userdel -r hive        userdel -r kafka  userdel -r mapred     userdel -r spark  userdel -r tez   userdel -r yarn      userdel -r zookeeperuserdel -r ams        userdel -r atlas   userdel -r flume   userdel -r hbase    userdel -r hdfs  userdel -r infra-solr  userdel -r livy   userdel -r mongodb  userdel -r oozie  userdel -r sqoop  userdel -r zeppelinuserdel -r impalauserdel -r kuduuserdel -r hadoop groupdel hadoopgroupdel cloudera-scmgroupdel ambari-qa  groupdel appmon  groupdel falcon  groupdel gpadmin  groupdel hcat  groupdel hive        groupdel kafka  groupdel mapred     groupdel spark  groupdel tez   groupdel yarn      groupdel zookeepergroupdel ams        groupdel atlas   groupdel flume   groupdel hbase    groupdel hdfs  groupdel infra-solr  groupdel livy   groupdel mongodb  groupdel oozie  groupdel sqoop  groupdel zeppelingroupdel impalagroupdel kudu # 删除其它节点上的CDHssh root@172.16.1.125 /root/remove_cloudera.shssh root@172.16.1.126 /root/remove_cloudera.shssh root@172.16.1.127 /root/remove_cloudera.sh

说明：

在Cloudera Manager节点执行此脚本。其它节点上的remove_cloudera.sh文件只是少了重建数据库一步，其它内容与此脚本一致。脚本执行过程中的错误是由于被删除的对象尚不存在，可以忽略。如果已经安装好了CDH，先在CM中停止所有服务后再执行此脚本。删除脚本一般都具有幂等性，可以多次执行。

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