Although more step installation and deployment, but as long as the operation in strict accordance with the document, generally will not have much problem CDH cluster. However, if the error occurred during the installation, or for other reasons need to reinstall CDH, without reinstalling the operating system, it is more difficult. The difficulty lies in too many things need to be deleted, do not delete clean very likely to cause the installation to fail. Internet to find the so-called "CDH completely uninstall" actually is incomplete. After repeated attempts of the day, and finally wrote a one-click delete CDH script is feasible under my own test environment. Delete the script file remove_cloudera.sh reads as follows:
#!/bin/bash
# 停止CM服务
service cloudera-scm-server stop
service cloudera-scm-agent stop
# 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_processes
umount cm_processes
umount 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-conf
rm -rf /var/lib/alternatives/impalad
rm -rf /var/lib/alternatives/impala-collect-diagnostics
rm -rf /var/lib/alternatives/impala-shell
rm -rf /var/lib/alternatives/impala-collect-minidumps
rm -rf /etc/alternatives/impala-shell
rm -rf /etc/alternatives/impalad
rm -rf /etc/alternatives/impala-collect-diagnostics
rm -rf /etc/alternatives/impala-conf
rm -rf /etc/alternatives/impala-collect-minidumps
rm -rf /var/log/impala*
rm -rf /var/lib/alternatives/zookeeper-client
rm -rf /var/lib/alternatives/zookeeper-server
rm -rf /var/lib/alternatives/zookeeper-conf
rm -rf /var/lib/alternatives/zookeeper-server-initialize
rm -rf /var/lib/alternatives/zookeeper-server-cleanup
rm -rf /var/lib/alternatives/zookeeper-security-migration
rm -rf /etc/alternatives/zookeeper-conf
rm -rf /etc/alternatives/zookeeper-server
rm -rf /etc/alternatives/zookeeper-server-cleanup
rm -rf /etc/alternatives/zookeeper-server-initialize
rm -rf /etc/alternatives/zookeeper-security-migration
rm -rf /etc/alternatives/zookeeper-client
rm -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-scm
userdel -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 zookeeper
userdel -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 zeppelin
userdel -r impala
userdel -r kudu
userdel -r hadoop
groupdel hadoop
groupdel cloudera-scm
groupdel ambari-qa
groupdel appmon
groupdel falcon
groupdel gpadmin
groupdel hcat
groupdel hive
groupdel kafka
groupdel mapred
groupdel spark
groupdel tez
groupdel yarn
groupdel zookeeper
groupdel ams
groupdel atlas
groupdel flume
groupdel hbase
groupdel hdfs
groupdel infra-solr
groupdel livy
groupdel mongodb
groupdel oozie
groupdel sqoop
groupdel zeppelin
groupdel impala
groupdel kudu
# 删除其它节点上的CDH
ssh [email protected] /root/remove_cloudera.sh
ssh [email protected] /root/remove_cloudera.sh
ssh [email protected] /root/remove_cloudera.shDescription:
- This script is executed at Cloudera Manager node.
- remove_cloudera.sh files on other nodes but less step to rebuild the database, other content is consistent with this script.
- During script execution error is due to a deleted object does not yet exist, it can be ignored.
- If you have already installed the CDH, stop all services in CM before performing this script.
- Delete script generally idempotent, can be executed multiple times.
