apiVersion: v1
kind: Service
metadata:
  name: nginx
  labels:
    app: nginx
spec:
  ports:
    - port: 80
      name: web-sts-svc
  clusterIP: None
  selector:

    app: nginx
---

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: stateful-nginx
spec:
  serviceName:  "nginx"
  replicas: 2
  podManagementPolicy: Parallel # 控制Pod扩缩行为。Parallel表示Pod扩缩时同时启停多个Pod，而不是一个一个进行（即默认的OrderedReady）
  updateStrategy:
    rollingUpdate:
      partition: 0
    type: RollingUpdate
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
        - name: nginx
          image: nginx:1.7.9
          ports:
            - containerPort: 80
              name: web