Machine Config Operator Degraded - unexpected on-disk state validating against rendered-worker: Missing expected kernel arguments in OCP 4.13

Solution Verified - Updated -

Issue

  • Cluster upgrade from 4.12 to 4.13 stuck and pointing to Missing expected kernel arguments error in Machine Config Operator.

  • Machine Config Operator (MCO) upgrade fails when on-disk validation against rendered-worker: Missing expected kernel arguments in OCP 4.13.

    I1201 20:15:07.177012 2600 daemon.go:2228] Expected MachineConfig kargs: [systemd.unified_cgroup_hierarchy=0 systemd.legacy_systemd_cgroup_controller=1]
E1201 20:15:07.177048 2600 writer.go:200] Marking Degraded due to: unexpected on-disk state validating against rendered-worker-41a9b76104544e45521c8e0e906b43a2: Missing expected kernel arguments: [systemd.unified_cgroup_hierarchy=0 systemd.legacy_systemd_cgroup_controller=1]

Environment

  • Red Hat OpenShift Container Platform (RHOCP)
    • 4.13

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