# Horizontal Pod Autoscaler for Backend API
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: veza-backend-api-hpa
  namespace: veza-production
  labels:
    app: veza-backend-api
    component: autoscaling
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: veza-backend-api
  minReplicas: 3
  maxReplicas: 20
  metrics:
  # CPU-based scaling
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 70
  # Memory-based scaling
  - type: Resource
    resource:
      name: memory
      target:
        type: Utilization
        averageUtilization: 80
  behavior:
    scaleUp:
      stabilizationWindowSeconds: 60
      policies:
      # Scale up by 100% (double) or add 4 pods, whichever is more
      - type: Percent
        value: 100
        periodSeconds: 15
      - type: Pods
        value: 4
        periodSeconds: 15
      selectPolicy: Max
    scaleDown:
      stabilizationWindowSeconds: 300
      policies:
      # Scale down by 10% or remove 1 pod, whichever is less
      - type: Percent
        value: 10
        periodSeconds: 60
      - type: Pods
        value: 1
        periodSeconds: 60
      selectPolicy: Min