apiVersion: autoscaling/v2beta1
kind: HorizontalPodAutoscaler
metadata:
  name: activator
  namespace: knative-serving
spec:
  maxReplicas: 20
  metrics:
  - resource:
      name: cpu
      targetAverageUtilization: 100
    type: Resource
  minReplicas: 1
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: activator