Nodes marked NotReady because the hostname is not set in Red Hat OpenShift 4

Solution Verified - Updated -

Issue

  • Why are OpenShift nodes showing localhost as the hostname.
  • OpenShift nodes reboot with a failed node-valid-hostname.service systemd service.
  • OCP nodes marked NotReady due to invalid hostname.

Environment

  • Red Hat OpenShift Container Platform
    • 4.x

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