kyverno.yaml

apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: disallow-host-namespaces
spec:
  background: true
  failurePolicy: Fail
  rules:
  - match:
      any:
      - resources:
          kinds:
          - Pod
    name: host-namespaces
    validate:
      message: Sharing the host namespaces is disallowed. The fields spec.hostNetwork,
        spec.hostIPC, and spec.hostPID must be unset or set to `false`.
      pattern:
        spec:
          =(hostIPC): "false"
          =(hostPID): "false"
  validationFailureAction: Enforce