Merge pull request kubernetes-sigs#9084 from chrischdi/pr-ksm-machine-cert-expiry

🌱 hack/observability: add capi_machine_status_certificatesexpirydate metric

Author: k8s-ci-robot

hack/observability/kube-state-metrics/crd-config.yaml

@@ -569,6 +569,15 @@ spec:
             address:
             - address
         type: Info
+    - name: status_certificatesexpirydate
+      help: Information about certificate expiration date of a control plane node.
+      each:
+        gauge:
+          nilIsZero: true
+          path:
+            - status
+            - certificatesExpiryDate
+        type: Gauge
     - name: status_noderef
       help: Information about the node reference of a machine.
       each:

hack/observability/kube-state-metrics/metrics/machine.yaml

@@ -87,6 +87,15 @@
             address:
             - address
         type: Info
+    - name: status_certificatesexpirydate
+      help: Information about certificate expiration date of a control plane node.
+      each:
+        gauge:
+          nilIsZero: true
+          path:
+            - status
+            - certificatesExpiryDate
+        type: Gauge
     - name: status_noderef
       help: Information about the node reference of a machine.
       each: