[Kubernetes] autoscaler

VerticalPodAutoscaler

• 리소스를 추가한 파드를 생성하여 기존 파드를 대체

HorizontalPodAutoscaler

• 동일한 파드를 생성/삭제하여 스케일링
• ex

   ---
   apiVersion: v1
   kind: Service
   metadata:
     name: read-front
   spec:
     ports:
       - name: grpc
         port: 50000
         protocol: TCP
     selector:
       app: read-front
  	
   ---
   apiVersion: autoscaling/v2beta2
   kind: HorizontalPodAutoscaler
   metadata:
     name: xxx
     namespace: default
   spec:
     scaleTargetRef:
       apiVersion: apps/v1
       kind: Deployment
       name: deployment-name
     minReplicas: 1
     maxReplicas: 10
     metrics:
       - type: Resource
         resource:
           name: cpu
           target:
             type: Utilization
             averageUtilization: 50
       - type: Resource
         resource:
           name: memory
           target:
             type: AverageValue
             averageValue: 100Mi
       - type: Pods
         pods:
           metric:
             name: packets-per-second
           target:
             type: AverageValue
             averageValue: 1k
       - type: Object
         object:
           metric:
             name: requests-per-second
           describedObject:
             apiVersion: networking.k8s.io/v1beta1
             kind: Ingress
             name: main-route
           target:
             type: Value
             value: 1k