kyverno/test/Ingress/policy-ingress.yaml

apiVersion: kubepolicy.nirmata.io/v1alpha1
kind: Policy
metadata :
  name : policy-ingress
spec :
  rules:
    - name: ingress1
      resource:
        kinds : 
        - Ingress
        selector:
          matchLabels:
            originalLabel: isHere
      mutate:
        patches:
        - path: "/metadata/labels/isMutated"
          op: add
          value: "true"
        - path : "/spec/rules/0/http/paths/0/path"
          op : replace
          value: "/mutatedpath"
      validate:
        message: "Ingress allowed only for prod services"
        pattern:
          spec:
            rules:
            - http:
               paths:
                - path: "*"
                  backend:
                    serviceName: "*prod"