kubernetes - 无法将部署从 apiVersion extensions/v1beta1 升级到 apps/v1，它会自动使用 extensions/v1beta1

Question

我目前有一个 GKE Kubernetes 1.15 集群，我计划升级到 1.16。由于 1.16 不支持某些 API，我必须将我的部署从 extensions/v1beta1 更改为 apps/v1。

使用这个简单的 deployment.yml:

apiVersion: apps/v1
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:1.14.2
        ports:
        - containerPort: 80

当我将它应用到我的 1.15 集群时: kubectl -n mynamespace deployment.yml ，实际看到的是以下内容( kubectl -n mynamespace get deployments nginx-deployment ):

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "1"
    kubectl.kubernetes.io/last-applied-configuration: |
...

如您所见，实际的 apiVersion 是 extensions/v1beta1 而不是 apps/v1。为什么不应用我指定的版本？

更新:

这是我的 kubectl 版本:

Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.4", GitCommit:"8d8aa39598534325ad77120c120a22b3a990b5ea", GitTreeState:"clean", BuildDate:"2020-03-12T23:41:24Z", GoVersion:"go1.14", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"15+", GitVersion:"v1.15.9-gke.24", GitCommit:"39e41a8d6b7221b901a95d3af358dea6994b4a40", GitTreeState:"clean", BuildDate:"2020-02-29T01:24:35Z", GoVersion:"go1.12.12b4", Compiler:"gc", Platform:"linux/amd64"}

Answer 1

从 kubectl get 返回的 apiVersion不一定与您当前配置的实际 apiVersion 匹配。

看这里:https://github.com/kubernetes/kubernetes/issues/62283#issuecomment-380968868

引用:

kubectl get uses server-preferred order, which will prefer the extensions API group for backward compatibility, until extensions is removed. That is to say, kubectl get deployment uses extenions/v1beta1 endpoint by default.

To get deployments under apps API group, you can use kubectl get deployment.apps, which returns you apps/v1 deployments.