Whole OpenStack environment is down. Can't access Horizon. Keystone is not responding. Ceilometer mongoDB filling up controllers root disk

Solution Verified - Updated -

Issue

Red Hat OpenStack Platform 10.0 is deployed successfully. After some days or operation, we found the whole environment down and is not accessible anymore with below symptoms.

  • Horizon is not accessible throwing below error message.
"504 Gateway Time-out"
  • CLI and API operations fail reporting authentication issues with keystone. Since keystone authentication fails, none of the OpenStack services can be used.
  • Sometimes Ceilometer mongoDB filling up controllers root disk despite of following the suggestions provided in Red Hat solution.
  • Why ceilometer is consuming high disk space?

Environment

  • Red Hat OpenStack Platform 10.0
  • Swift backend for gnocchi (Default backend if not using ceph)

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