If you are not familiar with the oc command, refer to OpenShift - Getting Started with the oc command.

The oc get operators command can be used to listed the installed Operators.

~]# oc get operators
NAME                                                            AGE
addon-operator.openshift-addon-operator                         182d
aws-efs-csi-driver-operator.openshift-cluster-csi-drivers       20d
aws-efs-operator.openshift-operators                            20d
cluster-logging-operator.openshift-logging                      205d
cluster-logging.openshift-logging                               188d
configure-alertmanager-operator.openshift-monitoring            209d
custom-domains-operator.openshift-custom-domains-operator       209d
elasticsearch-operator.openshift-operators-redhat               188d
managed-upgrade-operator.openshift-managed-upgrade-operator     209d
managed-velero-operator.openshift-velero                        209d
must-gather-operator.openshift-must-gather-operator             209d
ocm-agent-operator.openshift-ocm-agent-operator                 164d
osd-metrics-exporter.openshift-osd-metrics                      209d
rbac-permissions-operator.openshift-rbac-permissions            209d
route-monitor-operator.openshift-route-monitor-operator         209d
splunk-forwarder-operator.openshift-splunk-forwarder-operator   209d

The oc get clusterserviceversions (or just oc get csv) command can be used to list your Cluster Service Versions (CSVs) which may include certain Operators.

~]$ oc get clusterserviceversions --namespace openshift-logging
NAME                             DISPLAY                            VERSION   REPLACES                         PHASE
cluster-logging.v5.6.15          Red Hat OpenShift Logging          5.6.15    cluster-logging.v5.6.14          Succeeded
elasticsearch-operator.v5.6.15   OpenShift Elasticsearch Operator   5.6.15    elasticsearch-operator.v5.6.14   Succeeded

The oc get clusteroperator (or oc get co) command can be used to list the cluster operators. Something like this should be returned. Notice in this example that the authentication operator is degraded.

~]$ oc get clusteroperator
NAME                                       VERSION   AVAILABLE   PROGRESSING   DEGRADED   SINCE
authentication                             4.6.41    False       True          True       3h17m
cloud-credential                           4.6.41    True        False         False      335d
cluster-autoscaler                         4.6.41    True        False         False      335d
config-operator                            4.6.41    True        False         False      335d
console                                    4.6.41    True        False         True       6d14h
csi-snapshot-controller                    4.6.41    True        False         False      6d15h
dns                                        4.6.41    True        False         False      225d
etcd                                       4.6.41    True        False         False      335d
image-registry                             4.6.41    True        False         False      6d15h
ingress                                    4.6.41    True        False         False      40d
insights                                   4.6.41    True        False         False      335d
kube-apiserver                             4.6.41    True        False         False      335d
kube-controller-manager                    4.6.41    True        False         False      335d
kube-scheduler                             4.6.41    True        False         False      335d
kube-storage-version-migrator              4.6.41    True        False         False      6d13h
machine-api                                4.6.41    True        False         False      335d
machine-approver                           4.6.41    True        False         False      335d
machine-config                             4.6.41    True        False         False      6d12h
marketplace                                4.6.41    True        False         False      6d14h
monitoring                                 4.6.41    True        False         False      6d12h
network                                    4.6.41    True        False         False      335d
node-tuning                                4.6.41    True        False         False      6d15h
openshift-apiserver                        4.6.41    True        False         False      6d14h
openshift-controller-manager               4.6.41    True        False         False      17d
openshift-samples                          4.6.41    True        False         False      6d15h
operator-lifecycle-manager                 4.6.41    True        False         False      335d
operator-lifecycle-manager-catalog         4.6.41    True        False         False      335d
operator-lifecycle-manager-packageserver   4.6.41    True        False         False      6d14h
service-ca                                 4.6.41    True        False         False      335d
storage                                    4.6.41    True        False         False      225d

The oc describe clusteroperator command can be used to display more information of a cluster operator. In this example, the details of the authentication object will be displayed, where the Status section might have details on why the operator is degraded.

There are a wide variety of issues that can cause an operator to become degraded, far too many to list here, so this is just a starting point when looking into why an operator is degraded.

~]# oc describe clusteroperator authentication
Status:
  Conditions:
    Last Transition Time:  2022-06-15T01:27:40Z
    Message:               OAuthRouteCheckEndpointAccessibleControllerDegraded: Get "https://oauth-openshift.apps.openshift.example.com/healthz": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
ProxyConfigControllerDegraded: endpoint("https://oauth-openshift.apps.openshift.example.com/healthz") found in NO_PROXY(".cluster.local,.svc,.example.com,localhost") is unreachable with proxy(Get "https://oauth-openshift.apps.openshift.example.com/healthz": context deadline exceeded) and without proxy(Get "https://oauth-openshift.apps.openshift.example.com/healthz": context deadline exceeded)
    Reason:                OAuthRouteCheckEndpointAccessibleController_SyncError::ProxyConfigController_SyncError
    Status:                True
    Type:                  Degraded