apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: web # StatefulSet 名称
  labels:
    app: nginx # 应用标签
spec:
  serviceName: "nginx" # 关联的Headless Service名称，用于网络标识
  replicas: 3 # 副本数量
  selector:
    matchLabels:
      app: nginx # 必须匹配spec.template.metadata.labels
  
  # Pod模板
  template:
    metadata:
      labels:
        app: nginx # 必须匹配spec.selector.matchLabels
    spec:
      terminationGracePeriodSeconds: 10 # 优雅终止等待时间(秒)
      containers:
      - name: nginx # 容器名称
        image: nginx:1.19 # 容器镜像
        ports:
        - containerPort: 80 # 容器暴露端口
          name: web # 端口名称
        volumeMounts:
        - name: www # 挂载的卷名称，对应volumes中的名称
          mountPath: /usr/share/nginx/html # 挂载到容器内的路径
  
  # 卷声明模板(PVC模板)
  volumeClaimTemplates:
  - metadata:
      name: www # 卷名称，与volumeMounts中的name对应
    spec:
      accessModes: [ "ReadWriteOnce" ] # 访问模式
      storageClassName: "standard" # 存储类名称
      resources:
        requests:
          storage: 1Gi # 存储空间请求大小

apiVersion: v1
kind: Service
metadata:
  name: nginx # Service名称，与StatefulSet中的serviceName对应
  labels:
    app: nginx
spec:
  ports:
  - port: 80 # Service端口
    name: web # 端口名称
  clusterIP: None # 设置为None表示创建Headless Service
  selector:
    app: nginx # 选择器标签，与StatefulSet中的标签匹配