HPA based on CPU

nginx.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
  namespace: ae-ops-testing
  labels:
    app: nginx
spec:
  # replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.7.9
        ports:
        - containerPort: 80
        resources:
          requests:
            memory: "64Mi"
            cpu: "250m"
          limits:
            memory: "128Mi"
            cpu: "500m"
---
apiVersion: v1
kind: Service
metadata:
  name: nginx
  namespace: ae-ops-testing
  labels:
    app: nginx
spec:
  ports:
  - port: 80
    protocol: TCP
  selector:
    app: nginx
---
kind: ServiceMonitor
apiVersion: monitoring.coreos.com/v1
metadata:
  name: nginx
  namespace: ae-ops-testing
  labels:
    prometheus: kube-prometheus
spec:
  selector:
    matchLabels:
      app: nginx
  endpoints:
  - port: http
  namespaceSelector:
    matchNames:
    - ae-ops-testing
---
kind: HorizontalPodAutoscaler
apiVersion: autoscaling/v2beta1
metadata:
  name: nginx
  namespace: ae-ops-testing
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: nginx
  minReplicas: 1
  maxReplicas: 10
  metrics:
  - type: Pods
    pods:
      metricName: cpu_usage
      targetAverageValue: 10m