Red Hat Satellite 6.11 WebUI or Capsule httpd fails to load after performing RHEL7 to RHEL8 Leap upgrade

Solution Verified - Updated -

Issue

  • After upgrading the Red Hat Satellite server underlying Operating System (OS) from RHEL 7 to RHEL 8, WebUI fails to load and 'hammer ping' returns the following error.

    [root@satellite ~]# hammer ping
    Could not load the API description from the server:
    Failed to open TCP connection to satellite.example.com:443 (Connection refused - connect(2) for "satellite.example.com" port 443)
     - is the server down?
     - was 'foreman-rake apipie:cache' run on the server when using apipie cache? (typical production settings)
    Warning: An error occured while loading module hammer_cli_foreman.
    Could not load the API description from the server:
    Failed to open TCP connection to satellite.example.com:443 (Connection refused - connect(2) for "satellite.example.com" port 443)
    
    May 17 09:35:47 satellite httpd[1344]: AH00534: httpd: Configuration error: More than one MPM loaded.
    May 17 09:35:47 satellite systemd[1]: httpd.service: Main process exited, code=exited, status=1/FAILURE
    May 17 09:35:47 satellite systemd[1]: httpd.service: Failed with result 'exit-code'.
    May 17 09:35:47 satellite systemd[1]: Failed to start The Apache HTTP Server.
    
  • similar issue is hit after completing LEAPP upgrade of Satellite 6.11 from RHEL7 to RHEL8: httpd service affected similarly, Satellite's WebUI shows many errors when opening the Capsule's details page

Environment

  • Red Hat Satellite 6.11
    • optionally Red Hat Capsule 6.11
  • Red Hat Enterprise Linux 8

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