VMManager not staring |Job for ovmm.service failed because the control process exited with error code. See "systemctl status ovmm.service" and "journal ctl -xe" for details.

If you're encountering an issue where Oracle VM Manager won't start due to your disk being full, don't worry! Here's what you can do to resolve it:

First, let's try to get Oracle VM Manager up and running:

1. Check if the 'ovmm_mysql' service is running on your Manager server by using this command:
   service ovmm_mysql status
2. If you find that the 'ovmm_mysql' service isn't running correctly, you should stop both the 'ovmm_mysql' and 'ovmm' services using these commands:
   service ovmm_mysql stop
   service ovmm stop
3. Start the 'ovmm_mysql' service again:
   service ovmm_mysql start
4. Once the 'ovmm_mysql' service is up and running, proceed to start the 'ovmm' service:
   service ovmm start
If the above steps don't resolve the issue, let's investigate further:

- First, check your disk usage using the command:
  df -h
  If you notice that the root location is shown as 100% full, you need to free up some space. Here's what you can do:

- Check what's taking up space by running these commands:
  du -h -s /*
  du -h -s /var/*
  du -h -s /u01/app/oracle/ovm-manager-3/domains/ovm_domain/servers/AdminServer/logs
  du -h -s /var/cache/*
  du -h -s /u01/app/oracle/ovm-manager-3/domains/ovm_domain/servers/AdminServer/logs/*

- If you find space-consuming items, try these steps:

  1. Clean up the yum cache to free up some space:
     yum clean all
     df /
  2. If needed, you can move the 'AdminServer.out' log file to a backup location or delete it:
     mv /u01/app/oracle/ovm-manager-3/domains/ovm_domain/servers/AdminServer/logs/AdminServer.out /path/to/backup/location
Finally, once you've cleared up space, you can restart the Oracle VM Manager services:
service ovmm_mysql start
service ovmm start
And there you have it! Your Oracle VM Manager should be up and running again. If you've followed these steps, you should be all set.
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