hamster.yaml

# This config creates a deployment with two pods, each requesting 100 millicores
# and trying to utilize slightly above 500 millicores (repeatedly using CPU for
# 0.5s and sleeping 0.5s).
# It also creates a corresponding Vertical Pod Autoscaler that adjusts the
# requests.
# Note that the update mode is left unset, so it defaults to "Auto" mode.
---
apiVersion: "autoscaling.k8s.io/v1"
kind: VerticalPodAutoscaler
metadata:
  name: hamster-vpa
spec:
  # recommenders field can be unset when using the default recommender.
  # When using an alternative recommender, the alternative recommender's name
  # can be specified as the following in a list.
  # recommenders: 
  #   - name: 'alternative'
  targetRef:
    apiVersion: "apps/v1"
    kind: Deployment
    name: hamster
  resourcePolicy:
    containerPolicies:
      - containerName: '*'
        minAllowed:
          cpu: 100m
          memory: 50Mi
        maxAllowed:
          cpu: 1
          memory: 500Mi
        controlledResources: ["cpu", "memory"]
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hamster
spec:
  selector:
    matchLabels:
      app: hamster
  replicas: 2
  template:
    metadata:
      labels:
        app: hamster
    spec:
      securityContext:
        runAsNonRoot: true
        runAsUser: 65534 # nobody
      containers:
        - name: hamster
          image: registry.k8s.io/ubuntu-slim:0.14
          resources:
            requests:
              cpu: 100m
              memory: 50Mi
          command: ["/bin/sh"]
          args:
            - "-c"
            - "while true; do timeout 0.5s yes >/dev/null; sleep 0.5s; done"