kube-apiserver was unhealthy due to the following issue:

~~~
Sep 08 18:20:25 master1.hztt-rcp-rm17-ocp-03.dyn.nesc.nokia.net kubenswrapper[5695]:         rpc error: code = Unknown desc = failed to create pod network sandbox k8s_revision-pruner-7-master1.hztt-rcp-rm17-ocp-03.dyn.nesc.nokia.net_openshift-kube-apiserver_1a34d8bd-0da0-4fea-b66e-9e62d45f4cba_0(46c554e2e2cd45203cb2814bbe85a9d78f68aca4fd5aedc8151da4dc43915ea3): error adding pod openshift-kube-apiserver_revision-pruner-7-master1.hztt-rcp-rm17-ocp-03.dyn.nesc.nokia.net to CNI network "multus-cni-network": plugin type="multus" name="multus-cni-network" failed (add): [openshift-kube-apiserver/revision-pruner-7-master1.hztt-rcp-rm17-ocp-03.dyn.nesc.nokia.net/1a34d8bd-0da0-4fea-b66e-9e62d45f4cba:ovn-kubernetes]: error adding container to network "ovn-kubernetes": CNI request failed with status 400: '[openshift-kube-apiserver/revision-pruner-7-master1.hztt-rcp-rm17-ocp-03.dyn.nesc.nokia.net 46c554e2e2cd45203cb2814bbe85a9d78f68aca4fd5aedc8151da4dc43915ea3] [openshift-kube-apiserver/revision-pruner-7-master1.hztt-rcp-rm17-ocp-03.dyn.nesc.nokia.net 46c554e2e2cd45203cb2814bbe85a9d78f68aca4fd5aedc8151da4dc43915ea3] failed to configure pod interface: timed out waiting for OVS port binding (ovn-installed) for 0a:58:ac:15:00:24 [172.21.0.36/23]
~~~