busybox：

apiVersion: apps/v1
kind: Deployment
metadata:
  name: busybox
spec:
  selector:
    matchLabels:
      app: busybox
  replicas: 2
  template:
    metadata:
      labels:
        app: busybox
    spec:
      containers:
      - name: busybox
        image: busybox
        command: ['sh', '-c', 'echo Hello Kubernetes! && sleep 3600']