k8s_autoscale-RPS.yaml

---
### Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      name: nginx
      labels:
        app: nginx
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: app
                    operator: In
                    values:
                      - nginx
              topologyKey: "kubernetes.io/hostname"

      containers:
        - name: nginx
          image: k8s.gcr.io/hpa-example
          resources:
            requests:
              memory: "256Mi"
              cpu: "500m"
            limits:
              memory: "500Mi"
              cpu: "1"
---
### Service
apiVersion: v1
kind: Service
metadata:
  name: nginx
spec:
  selector:
    app: nginx
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80
---
#Ingress
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: nginx
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
    - host: nginx.example.com
      http:
        paths:
          - backend:
              service:
                name: nginx
                port:
                  number: 80
            path: /
            pathType: Prefix
---
### HPA
apiVersion: autoscaling/v2beta2
kind: HorizontalPodAutoscaler
metadata:
  name: nginx
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: nginx
  minReplicas: 1
  maxReplicas: 10
  metrics:
    - type: Object
      object:
        metric:
          name: nginx_ingress_controller_requests_per_second
        describedObject:
          apiVersion: networking.k8s.io/v1
          kind: Ingress
          name: nginx
        target:
          type: AverageValue
          averageValue: 2