limitrange.yaml

kind: LimitRange
apiVersion: v1
metadata:
  name: stressy-core-resource-limits
spec:
  limits:
    - type: Container
      max:
        cpu: '4'
        memory: 6Gi
      default:
        cpu: 500m
        memory: 1536Mi
      defaultRequest:
        cpu: 50m
        memory: 256Mi
    - type: Pod
      max:
        cpu: '4'
        memory: 12Gi

stress-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: stress
spec:
  selector:
    matchLabels:
      app: stress
  replicas: 2
  template:
    metadata:
      labels:
        app: stress
    spec:
      containers:
        - name: hamster
          image: k8s.gcr.io/ubuntu-slim:0.1
          resources:
            requests:
              cpu: 100m
              memory: 50Mi
          command: ["/bin/sh"]
          args:
            - "-c"
            - "while true; do timeout 0.5s yes >/dev/null; sleep 0.5s; done"

stress-vpa.yaml

apiVersion: autoscaling.k8s.io/v1
kind: VerticalPodAutoscaler
metadata:
  name: stress-recommender
spec:
  targetRef:
    apiVersion: "apps/v1"
    kind:       Deployment 
    name:       stress 
  updatePolicy:
    updateMode: "Auto"