apiVersion: apps/v1
kind: Deployment
metadata:
  name: label-nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx-app
  template:
    metadata:
      labels:
        app: nginx-app
    spec:
      nodeSelector:        # 节点选择器
        env: prod  # 选择包含这个键值对的node
      containers:
        - name: nginx-label
          image: m.daocloud.io/docker.io/nginx