apiVersion: apps/v1
kind: Deployment
metadata:
  name: guestbook
spec:
  replicas: 4
  strategy:
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
    type: RollingUpdate
  template:
    spec:
      containers:
      - name: guestbook-app
        resources:
          requests:
            cpu: 200m
            memory: 200Mi