kubernetes - 创建kubectl后更改了apiversion

Question

在kubernetes 1.8中，例如，当我创建一个部署时

apiVersion: apps/v1beta2 # for versions before 1.8.0 use apps/v1beta1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx:1.7.9
        ports:
        - containerPort: 80

然后当我做一个

kubectl get deploy nginx-deployment -o yaml

我有

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "1"
  creationTimestamp: 2018-01-24T01:01:01Z

....

为什么apiversion是extension / v1beta1而不是apiVersion:apps / v1beta2

Answer 1

创建部署时，apiserver会对其进行持久化，并能够将持久化的部署转换为任何受支持的版本。
kubectl get deployments实际上请求扩展名/ v1beta1版本(您可以通过添加--v = 6来查看)

要获取apps / v1beta2部署，请执行kubectl get deployments.v1beta2.apps