kyverno/test/conformance/chainsaw/validating-policies/context/image-data/policy.yaml

apiVersion: policies.kyverno.io/v1alpha1
kind: ValidatingPolicy
metadata:
  name: check-deployment-labels
spec:
  matchConstraints:
    resourceRules:
    - apiGroups:   [apps]
      apiVersions: [v1]
      operations:  [CREATE, UPDATE]
      resources:   [deployments]
  variables:
    - name: image
      expression: >-
        resource.GetImageData("ghcr.io/kyverno/kyverno:latest")
    - name: accept
      expression: >-
        variables.image != null
  validations:
    - expression: >-
        variables.accept
      message: >-
        Deployment must be accepted