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

apiVersion: policies.kyverno.io/v1alpha1
kind: ValidatingPolicy
metadata:
  name: cpol-apicall-correct
spec:
  matchConstraints:
    resourceRules:
      - apiGroups: []
        apiVersions: [v1]
        operations: [CREATE, UPDATE]
        resources: [pods]
  variables:
    - name: dcount
      expression: >-
        globalcontext.Get("gctxentry-apicall-correct", "")
  validations:
    - expression: >-
        variables.dcount != 0
      message: >-
        main-deployment should exist