apiVersion : kyverno.io/v1alpha1
kind: Policy
metadata:
  name: image-pull-policy
spec:
  rules:
  - name: image-pull-policy
    resource:
      kinds:
      - Deployment
      # - StatefulSet
      # name: "my-deployment"
      # selector :
      #   matchLabels:
      #     app.type: prod
      # namespace: "my-namespace"
    mutate:
      overlay:
        spec:
          template:
            spec:
              containers:
              # select images which end with :latest
              - (image): "*latest"
                # require that the imagePullPolicy is "IfNotPresent"  
                imagePullPolicy: IfNotPresent