03-php-hpa.yaml

# When you use the Google Cloud console, HorizontalPodAutoscaler objects are created using the autoscaling/v2 API.
# https://cloud.google.com/kubernetes-engine/docs/how-to/horizontal-pod-autoscaling#api-versions
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: php-apache
  namespace: doit-lab-13
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: php-apache
  minReplicas: 1
  maxReplicas: 10
  metrics:
    - type: Resource
      resource:
        name: cpu
        target:
          type: Utilization
          averageUtilization: 50
  # default behavior: https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/#default-behavior
  behavior:
    scaleDown:
      stabilizationWindowSeconds: 0
      policies:
        - type: Percent
          value: 25
          periodSeconds: 30
    scaleUp:
      stabilizationWindowSeconds: 0
      policies:
        - type: Percent
          value: 100
          periodSeconds: 60
        - type: Pods
          value: 4
          periodSeconds: 30
      selectPolicy: Max