apiVersion: admissionregistration.k8s.io/v1alpha1 kind: ValidatingAdmissionPolicy metadata: name: "demo-policy.example.com" spec: failurePolicy: Fail matchConstraints: resourceRules: - apiGroups: ["apps"] apiVersions: ["v1"] operations: ["CREATE", "UPDATE"] resources: ["deployments"] validations: - key: "high-replica-count" expression: "object.spec.replicas > 50" messageExpression: "'Deployment spec.replicas set to ' + string(object.spec.replicas)"