Horizon Dashboard is inaccessible with 504 Gateway Timeout Error

Solution Verified - Updated -

Issue

  • Can not access horizon dashboard.
  • Horizon fails to load with 504 gateway timeout error.
  • Openstack commands are timing out
  • After restarting the httpd service on the controller nodes, dashboard works for some time and again times out

Environment

  • Red Hat OpenStack Platform 10

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