apiVersion : kyverno.io/v1
kind: ClusterPolicy
metadata:
  name: disallow-helm-tiller
  annotations:
    policies.kyverno.io/category: Security
    policies.kyverno.io/description: 
spec:
  rules:
  - name: validate-helm-tiller
    match:
      resources:
        kinds:
        - Pod
    validate:
      message: "Helm Tiller is not allowed"  
      pattern:
        spec:
          containers:
          - name: "*"
            image: "!*tiller*"