k8s部分yaml文件解读

deployment：

---
apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: nginx-deploy
  labels:
    app: nginx
spec:
  # 副本数
  replicas: 3
  # 允许保留历史版本的数量
  revisionHistoryLimit: 15
  # 5秒之后执行操作
  minReadySeconds: 5
  strategy:
    # 升级
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.10.0
        ports:
        - containerPort: 80