Uninstall cloudera Manager

Uninstall cloudera-Manager

sudo /usr/share/cmf/uninstall-cloudera-manager.sh

Always select Yes

After the uninstallation is complete, it will ask you if you want to clean up the data in the database, select Yes

2. Delete the installation directory of cloudera according to the official introduction.

sudo rm -rf /usr/share/cmf /var/lib/cloudera* /var/cache/yum/x86_64/6/cloudera* /var/log/cloudera* /var/run/cloudera*

Here, I spoke up, and another database configuration file was not cleaned up, which led to an error in the old saying when I re-installed the service later.

rm -rf /etc/cloudera*

3. Uninstall the RPM package of cloudera

Check the packages installed

rpm -qa | grep cloudera

Delete them one by one

for f in `rpm -qa | grep cloudera `  ; do rpm -e ${f} ; done

4. Clear cloudera Related Files

sudo rm -rf /var/lib/flume-ng /var/lib/hadoop* /var/lib/hue /var/lib/oozie /var/lib/solr /var/lib/sqoop*

sudo rm -rf /dfs /mapred /yarn

rm -rf /var/run/hadoop* /var/run/flume-ng /var/run/cloudera* /var/run/oozie/ /var/run/sqoop2 /var/run/zookeeper /var/run/hbase /var/run/impala /var/run/hive /var/run/hdfs-sockets

rm -rf /usr/lib/hadoop /usr/lib/hadoop* /usr/lib/hive /usr/lib/hbase /usr/lib/oozie /usr/lib/sqoop* /usr/lib/zookeeper /usr/lib/bigtop* /usr/lib/flume-ng /usr/lib/hcatalog

rm -rf /usr/bin/hadoop* /usr/bin/zookeeper* /usr/bin/hbase* /usr/bin/hive* /usr/bin/hdfs /usr/bin/mapred /usr/bin/yarn /usr/bin/sqoop* /usr/bin/oozie

rm -rf /etc/alternatives/*

rm -rf /etc/hadoop* /etc/zookeeper* /etc/hive* /etc/hue /etc/impala /etc/sqoop* /etc/oozie /etc/hbase* /etc/hcatalog

There is also a very important path. Previously, from cdh4.5 update to cdh5, there has been a soft link to the old 4.5 directory. After searching for a long time, I finally found the problem with the help of the strace tool.

rm -rf /var/lib/alternatives/{cdh.app}

It is risky to simply delete all files under/var/lib/alternatives/*, because the system may also use alternatives for version control of other tools, we recommend that you delete CDH files.

5. Kill related processes

for u in hdfs mapred cloudera-scm hbase hue zookeeper oozie hive impala flume; do sudo kill $(ps -u $u -o pid=); done

6. Delete the lock file of the cloudera manager.

sudo rm /tmp/.scm_prepare_node.lock

7. Delete the parcel package distribution file and decompression File

rm -rf /opt/cloudera/parcel-cache /opt/cloudera/parcels

In this way, we have completely cleaned up.

For more information about deployment, see my previous blog.

Uninstall cloudera Manager