Regarding upgrade SNO clusters given kube-apiserver implements startup-monitor mechanism, when we upgrade 4.10 to 4.11, after completion of upgrade we see abnormal message for lastFailedRevisionErrors in KAS operator. We did not see any cluster operators degraded or abnormal operators status. We should not get these lastFailedRevisionErrors message in KAS operator when there is no issue on cluster after upgrade.

4.11.44-x86_64 on upi-on-baremetal with packet-sno_bip-etcd_encryption-realtime_kernel-ci profile

Always

1. Install 4.10 sno cluster and upgrade to 4.11(upgrade path -4.10.63-x86_64 - > 4.11.44-x86_64)
 2. After completion of upgrade.
3. Run oc get kubeapiserver.operator cluster -o jsonpath='{.status.nodeStatuses[?(@.lastFailedRevisionErrors)]}' 

{"currentRevision":9,"lastFailedCount":1,"lastFailedReason":"InstallerFailed","lastFailedRevision":3,"lastFailedRevisionErrors":["installer: ,\n CertSecretNames: ([]string) (len=10 cap=16) {\n  (string) (len=17) \"aggregator-client\",\n  (string) (len=30) \"localhost-serving-cert-certkey\",\n  (string) (len=31) \"service-network-serving-certkey\",\n  (string) (len=37) \"external-loadbalancer-serving-certkey\",\n  (string) (len=37) \"internal-loadbalancer-serving-certkey\",\n  (string) (len=33) \"bound-service-account-signing-key\",\n  (string) (len=40) \"control-plane-node-admin-client-cert-key\",\n  (string) (len=31) \"check-endpoints-client-cert-key\",\n  (string) (len=14) \"kubelet-client\",\n  (string) (len=16) \"node-kubeconfigs\"\n },\n OptionalCertSecretNamePrefixes: ([]string) (len=11 cap=16) {\n  (string) (len=17) \"user-serving-cert\",\n  (string) (len=21) \"user-serving-cert-000\",\n  (string) (len=21) \"user-serving-cert-001\",\n  (string) (len=21) \"user-serving-cert-002\",\n  (string) (len=21) \"user-serving-cert-003\",\n  (string) (len=21) \"user-serving-cert-004\",\n  (string) (len=21) \"user-serving-cert-005\",\n  (string) (len=21) \"user-serving-cert-006\",\n  (string) (len=21) \"user-serving-cert-007\",\n  (string) (len=21) \"user-serving-cert-008\",\n  (string) (len=21) \"user-serving-cert-009\"\n },\n CertConfigMapNamePrefixes: ([]string) (len=4 cap=4) {\n  (string) (len=20) \"aggregator-client-ca\",\n  (string) (len=9) \"client-ca\",\n  (string) (len=29) \"control-plane-node-kubeconfig\",\n  (string) (len=26) \"check-endpoints-kubeconfig\"\n },\n OptionalCertConfigMapNamePrefixes: ([]string) (len=1 cap=1) {\n  (string) (len=17) \"trusted-ca-bundle\"\n },\n CertDir: (string) (len=57) \"/etc/kubernetes/static-pod-resources/kube-apiserver-certs\",\n ResourceDir: (string) (len=36) \"/etc/kubernetes/static-pod-resources\",\n PodManifestDir: (string) (len=25) \"/etc/kubernetes/manifests\",\n Timeout: (time.Duration) 2m0s,\n StaticPodManifestsLockFile: (string) \"\",\n PodMutationFns: ([]installerpod.PodMutationFunc) \u003cnil\u003e,\n KubeletVersion: (string) \"\"\n})\nF0703 05:23:22.869315       1 cmd.go:106] Get \"https://172.30.0.1:443/api/v1/namespaces/openshift-kube-apiserver/pods?labelSelector=app%3Dinstaller\": net/http: TLS handshake timeout\n"],"lastFailedTime":"2023-07-03T05:24:37Z","nodeName":"master-00.rgangwar-39789.qe.devcluster.openshift.com"

Should be empty not see this error

https://drive.google.com/file/d/1O2qw0EksdB-NUSjmyjAh2wGb7p1S_FEi/view?usp=sharing