deploy-app-hpa

apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: frontend
  labels:
    app: tannt-myapp
    role: frontend
spec:
  selector:
    matchLabels:
      app: tannt-myapp
      role: frontend
  template: # create pods using pod definition in this template
    metadata:
      labels:
        app: tannt-myapp
        role: frontend
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80
        resources:
          limits: 
            cpu: "200m"
            memory: "200Mi"
---
apiVersion: autoscaling/v2beta1
kind: HorizontalPodAutoscaler
metadata:
  name: hpa-frontend
  namespace: default
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: frontend
  minReplicas: 3
  maxReplicas: 10
  metrics:
  - type: Resource
    resource:
      name: memory
      targetAverageUtilization: 80
  - type: Resource
    resource:
      name: cpu
      targetAverageUtilization: 3
---
apiVersion: v1
kind: Service
metadata:
  name: my-service
  #  namespace: ingress-nginx
spec:
  type: NodePort
  ports:
  - name: http
    protocol: TCP
    port: 80
    targetPort: 80
    nodePort: 30080
  selector:
    app: tannt-myapp
    role: frontend