RHOCP 4 cluster upgrade stuck with the Cluster Network Operator failing to apply ovnkube-master daemonset

Issue

• When upgrading a RHOCP cluster that is using OVNKubernetes CNI the following error is seen during network operator upgrade:

  Error while updating operator configuration: could not apply (apps/v1, Kind=DaemonSet) openshift-ovn-kubernetes/ovnkube-master: failed to apply / update (apps/v1, Kind=DaemonSet) openshift-ovn-kubernetes/ovnkube-master: DaemonSet.apps "ovnkube-master" is invalid: [spec.template.spec.containers[0].lifecycle.preStop: Required value: must specify a handler type, spec.template.spec.containers[1].lifecycle.preStop: Required value: must specify a handler type, spec.template.spec.containers[3].lifecycle.preStop: Required value: must specify a handler type]
  

• This issue is seen only for clusters that meet the following three criteria:

  • the cluster is using the OVNKubernetes CNI
  • the cluster has previously been upgraded from 4.10->4.11
  • the cluster is updated to 4.12.41+ or 4.13.16+
• The upgrade is currently not recommended for those clusters due to the fact that the upgrade will stall but with no known risk to availability.