Kubernetes configuration to demonstrate problem with pod and cluster node autoscaling

app-simple.yaml

# For this Github issue:
#   https://github.com/kubernetes/kubernetes/issues/34772
#
apiVersion: v1
kind: Service
metadata:
  name: my-app
  labels:
    name: my-app
spec:
  type: ClusterIP
  ports:
    - name: http
      port: 80
      targetPort: 8000
      protocol: TCP
  selector:
    name: my-app
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: my-app
spec:
  replicas: 4
  strategy:
    rollingUpdate:
      maxUnavailable: 50%
      maxSurge: 50%
  revisionHistoryLimit: 8
  template:
    metadata:
      labels:
        name: my-app
    spec:
      containers:
      - name: my-app
        image: ubuntu:16.04
        command: [ "/bin/bash", "-c" ]
        args: [ "apt update; apt install stress; stress --cpu 1 --io 1 & sleep 999999" ]
        resources:
          requests:
            cpu: 550m
        ports:
          - containerPort: 8000
---
apiVersion: autoscaling/v1
kind: HorizontalPodAutoscaler
metadata:
  name: my-app
  namespace: default
spec:
  scaleTargetRef:
    apiVersion: extensions/v1beta1
    kind: Deployment
    name: my-app
  minReplicas: 4
  maxReplicas: 300
  targetCPUUtilizationPercentage: 40