apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: require-public-runtime-gvisor
  annotations:
    policies.kyverno.io/title: Require gVisor in public-runtime namespaces
    policies.kyverno.io/category: Runtime Isolation
    policies.kyverno.io/severity: high
    policies.kyverno.io/description: >-
      Tier O and Tier R application namespaces are labeled as public-runtime
      namespaces. Every admitted pod in those namespaces must use gVisor.
spec:
  validationFailureAction: Enforce
  background: true
  rules:
    - name: public-pods-use-gvisor
      match:
        any:
          - resources:
              kinds:
                - Pod
              namespaceSelector:
                matchLabels:
                  security.quorate.internal/public-runtime: gvisor
      validate:
        message: Public-runtime pods must set spec.runtimeClassName to gvisor.
        pattern:
          spec:
            runtimeClassName: gvisor