label checker audit

cluster-resources/policies/label-checker.yaml

@@ -0,0 +1,38 @@
+apiVersion: kyverno.io/v1
+kind: ClusterPolicy
+metadata:
+  name: require-labels
+  annotations:
+    policies.kyverno.io/title: Require Labels
+    policies.kyverno.io/category: Best Practices
+    policies.kyverno.io/minversion: 1.6.0
+    policies.kyverno.io/severity: medium
+    policies.kyverno.io/subject: Pod, Label
+    policies.kyverno.io/description: Define and use labels that identify semantic attributes of your application or Deployment. A common set of labels allows tools to work collaboratively, describing objects in a common manner that all tools can understand. The recommended labels describe applications in a way that can be queried. This policy validates that the label `app.kubernetes.io/name` is specified with some value.
+spec:
+  validationFailureAction: Audit
+  background: true
+  rules:
+  - name: check-for-labels
+    exclude:
+      any:
+      - resources:
+          namespaces:
+          - kube-system
+          - istio-system
+          - argocd
+          - cert-manager
+          - monitoring
+          - secrets
+          - kyverno
+    match:
+      any:
+      - resources:
+          kinds:
+          - Pod
+    validate:
+      message: The label `app.kubernetes.io/name` is required.
+      pattern:
+        metadata:
+          labels:
+            app.kubernetes.io/name: "?*"