Bug 1962502: Add alerts for unmanaged Routes and Ingresses without IngressClassName

manifests/0000_90_ingress-operator_03_prometheusrules.yaml

@@ -64,3 +64,24 @@ spec:
         record: cluster:route_metrics_controller_routes_per_shard:median
       - expr: sum (openshift_route_info) by (tls_termination)
         record: cluster:openshift_route_info:tls_termination:sum
+    - name: openshift-ingress-to-route-controller.rules
+      rules:
+        - alert: IngressWithoutClassName
+          expr: openshift_ingress_to_route_controller_ingress_without_class_name == 1
+          for: 1d
+          labels:
+            severity: warning
+          annotations:
+            summary: Ingress without IngressClassName for 1 day
+            description: "This alert fires when there is an Ingress with an unset IngressClassName for longer than one day."
+            message: "Ingress {{ $labels.name }} is missing the IngressClassName for 1 day."
+        - alert: UnmanagedRoutes
+          expr: openshift_ingress_to_route_controller_route_with_unmanaged_owner == 1
+          for: 1h
+          labels:
+            severity: warning
+          annotations:
+            summary: Route owned by an Ingress no longer managed
+            description: "This alert fires when there is a Route owned by an unmanaged Ingress."
+            message: "Route {{ $labels.name }} is owned by an unmanaged Ingress."
+