How to Completely Clean, Remove or Uninstall Ambari for Fresh Install

[#1]

Sometimes when installing Ambari run repos are downloaded or there are maybe issues with python.

[#2 · Accepted solution]

Which user is ambari running under?

ps aux | grep ambari-server

rpm -qa | grep ambari

Try the following steps: On the master node

ambari-server stop
ambari-server reset
ambari-agent stop
yum erase ambari-server

rm -rf /var/lib/ambari-server

rm -rf /var/run/ambari-server

rm -rf /usr/lib/ambari-server

rm -rf /etc/ambari-server

rm -rf /var/log/ambari-server

rm -rf /usr/lib/python2.6/site-packages/ambari*

Reinstall Ambari server

yum install ambari-server  

ambari-server start

On each worker node:

ambari-agent stop 

yum erase ambari-agent 

rm -rf /var/lib/ambari-agent

rm -rf /var/run/ambari-agent

rm -rf /usr/lib/amrbari-agent

rm -rf /etc/ambari-agent

rm -rf /var/log/ambari-agent

rm -rf /usr/lib/python2.6/site-packages/ambari*

Then try re-running the install of Ambari Agent

yum install ambari-agent

vi /etc/ambari-agent/conf/ambari-agent.ini

#Change hostname to Ambari Server 

ambari-agent start

———————————————

- check logs

/var/log/ambari-agent/ambari-agent.log

/var/log/ambari-server/ambari-server.log

before starting the cluster install, see if the hosts have actually registered themselves (if doing it by updating ambari-agent.ini)

—————————

Troubleshooting

You can start ambari in debug mode to get more detailed aoutput via:

ambari-server start --verbose --debug

# or for short

ambari-server start -v -g

Significant files/directories:

• /var/log/ambari-server/ambari-server.log (for ambari server)
• /var/log/ambari-agent/ambari-agent.log (for ambari agens)
• /var/lib/ambari-agent/data/ (server action output)

SQL scripts to initialize psql DB

• /var/lib/ambari-server/resources/

Uninstall Postgres and move the redundant Ambari database file out of the way

yum remove postgres*

userdel -fr postgress

mv /var/lib/pgsql /var/lib/old.pgsql

[#3]

@amcbarnett@hortonworks.com

https://gist.github.com/nsabharwal/f57bb9e607114833df9b

Important

Ambari reinstall will give you following command while running check during the cluster install. It will save you lot of time

I run with --skip=users

python /usr/lib/python2.6/site-packages/ambari_agent/HostCleanup.py --silent --skip=users

[#4]

Also check this script:

https://github.com/hortonworks/HDP-Public-Utilities/blob/master/Installation/cleanup_script.sh

[#5]

There you go! Here's the solution to your problem. I struggled with this for like weeks and tried uninstalling and reinstalling over and over and then finally decided to share it here : How to completely remove and uninstall HDP

[#6]

Hi, the link seems broken. Can you share with us the working one? Thanks.

[#7]

I noticed couple of typos. be mindful if you are running them in batch

rm -rf /usr/lib/amrbari-server

rm-rf /usr/lib/python2.6/site-packages/ambari*

[#8]

@Ancil McBarnett

will your above solution delete the existing HDP installation also ?

[#9]

No it doesn't. You have to run additional scripts to delete HDP

[#10]

One of Powerful clean up by below python script on hadoop , It clean all directory , including user and files

[root@.ssh]# python /usr/lib/python2.6/site-packages/ambari_agent/HostCleanup.py --silent
INFO:HostCleanup:
Killing pid's: ['']

INFO:HostCleanup:Deleting packages: ['']

INFO:HostCleanup:
Deleting users: ['ams', 'ambari-qa', 'yarn', 'mapred', 'tez', 'hbase', 'sqoop', 'oozie', 'falcon', 'flume', 'hive', 'hcat']
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf ams
INFO:HostCleanup:Successfully deleted user: ams
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf ambari-qa
INFO:HostCleanup:Successfully deleted user: ambari-qa
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf yarn
INFO:HostCleanup:Successfully deleted user: yarn
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf mapred
INFO:HostCleanup:Successfully deleted user: mapred
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf tez
INFO:HostCleanup:Successfully deleted user: tez
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf hbase
INFO:HostCleanup:Successfully deleted user: hbase
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf sqoop
INFO:HostCleanup:Successfully deleted user: sqoop
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf oozie
INFO:HostCleanup:Successfully deleted user: oozie
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf falcon
INFO:HostCleanup:Successfully deleted user: falcon
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf flume
INFO:HostCleanup:Successfully deleted user: flume
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf hive
INFO:HostCleanup:Successfully deleted user: hive
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh userdel -rf hcat
INFO:HostCleanup:Successfully deleted user: hcat
INFO:HostCleanup:Executing command: /var/lib/ambari-agent/ambari-sudo.sh groupdel hadoop
WARNING:HostCleanup:Cannot delete group : hadoop, groupdel: cannot remove the primary group of user 'hduser'
INFO:HostCleanup:Path doesn't exists: /home/ams
INFO:HostCleanup:Path doesn't exists: /home/ambari-qa
INFO:HostCleanup:Path doesn't exists: /home/yarn
INFO:HostCleanup:Path doesn't exists: /home/mapred
INFO:HostCleanup:Path doesn't exists: /home/tez
INFO:HostCleanup:Path doesn't exists: /home/hbase
INFO:HostCleanup:Path doesn't exists: /home/sqoop
INFO:HostCleanup:Path doesn't exists: /home/oozie
INFO:HostCleanup:Path doesn't exists: /home/falcon
INFO:HostCleanup:Path doesn't exists: /home/flume
INFO:HostCleanup:Path doesn't exists: /home/hive
INFO:HostCleanup:Path doesn't exists: /home/hcat
INFO:HostCleanup:Deleting file/folder: /tmp/Jetty_0_0_0_0_60010_master____q3nwom
INFO:HostCleanup:Deleting file/folder: /tmp/Jetty_0_0_0_0_34300_mapreduce____.dx7bll
INFO:HostCleanup:Deleting file/folder: /tmp/hbase-hbase
INFO:HostCleanup:Deleting file/folder: /tmp/Jetty_0_0_0_0_34025_mapreduce____jgsznr
INFO:HostCleanup:Deleting file/folder: /tmp/Jetty_centos4_test_com_8088_cluster____.cl0kmf
INFO:HostCleanup:Deleting file/folder: /tmp/Jetty_0_0_0_0_8042_node____19tj0x
INFO:HostCleanup:
Deleting directories: ['']
INFO:HostCleanup:Path doesn't exists:
INFO:HostCleanup:
Deleting repo files: []
INFO:HostCleanup:
Erasing alternatives:{'symlink_list': [''], 'target_list': ['']}

INFO:HostCleanup:Path doesn't exists:
INFO:HostCleanup:Clean-up completed. The output is at /var/lib/ambari-agent/data/hostcleanup.result