新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch16/opa/templates/requiredLabels-template.yaml

@@ -0,0 +1,27 @@
+apiVersion: templates.gatekeeper.sh/v1beta1
+kind: ConstraintTemplate
+metadata:
+  name: requiredlabels
+spec:
+  crd:
+    spec:
+      names:
+        kind: RequiredLabels
+      validation:
+        openAPIV3Schema:
+          properties:
+            labels:
+              type: array
+              items: string
+  targets:
+    - target: admission.k8s.gatekeeper.sh
+      rego: |
+        package requiredlabels
+
+        violation[{"msg": msg, "details": {"missing_labels": missing}}] {
+          provided := {label | input.review.object.metadata.labels[label]}
+          required := {label | label := input.parameters.labels[_]}
+          missing := required - provided
+          count(missing) > 0
+          msg := sprintf("you must provide labels: %v", [missing])
+        }