为了能够回滚到以前的版本，不要忘记将 –record 参数附加到您的 kubectl 命令，例如：

kubectl apply -f DEPLOYMENT.yaml --record

然后你应该能够看到你所知道的历史：

kubectl rollout history deployment DEPLOYMENT_NAME

您的回滚将正常工作

kubectl rollout undo deployment DEPLOYMENT_NAME --to-revision=CHOOSEN_REVISION_NUMBER

小例子：

在这里考虑我的 nginx 部署清单“nginx-test.yaml”：

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  labels:
    app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80

让我们创建它：

❯ kubectl apply -f nginx-test.yaml --record
Flag --record has been deprecated, --record will be removed in the future
deployment.apps/nginx-deployment created

让我们检查一下这个部署的镜像，正如清单中所预期的那样：

❯ k get pod nginx-deployment-74d589986c-k9whj -o yaml | grep image:
  - image: nginx
    image: docker.io/library/nginx:latest

现在让我们将此部署的映像修改为“nginx:1.21”：

#"nginx=" correspond to the name of the container inside the pod create by the deployment.
❯ kubectl set image deploy nginx-deployment nginx=nginx:1.21.6
deployment.apps/nginx-deployment image updated

我们可以选择检查推出状态：

❯ kubectl rollout status deployment nginx-deployment
deployment "nginx-deployment" successfully rolled out

我们可以通过以下方式检查推出历史：

❯ kubectl rollout history deploy nginx-deployment
deployment.apps/nginx-deployment
REVISION  CHANGE-CAUSE
1         kubectl apply --filename=nginx-test.yaml --record=true
2         kubectl apply --filename=nginx-test.yaml --record=true

让我们按预期检查此部署的映像：

❯ k get pod nginx-deployment-66dcfc79b5-4pk7w -o yaml | grep image:
  - image: nginx:1.21.6
    image: docker.io/library/nginx:1.21.6

哦，不，我不喜欢这张照片！让我们回滚：

❯ kubectl rollout undo deployment nginx-deployment --to-revision=1
deployment.apps/nginx-deployment rolled back

创建：

> kubectl get pod -o wide
NAME                                    READY   STATUS              RESTARTS   AGE     IP           NODE                   NOMINATED NODE   READINESS GATES
pod/nginx-deployment-66dcfc79b5-4pk7w   1/1     Running             0          3m41s   10.244.3.4   so-cluster-1-worker3   <none>           <none>
pod/nginx-deployment-74d589986c-m2htr   0/1     ContainerCreating   0          13s     <none>       so-cluster-1-worker2   <none>           <none>

几秒钟后：

NAME                                    READY   STATUS    RESTARTS   AGE   IP            NODE                   NOMINATED NODE   READINESS GATES
pod/nginx-deployment-74d589986c-m2htr   1/1     Running   0          23s   10.244.4.10   so-cluster-1-worker2   <none>           <none>

如您所见，它有效：

❯ k get pod nginx-deployment-74d589986c-m2htr -o yaml | grep image:
  - image: nginx
    image: docker.io/library/nginx:latest

让我们重新检查历史：

❯ kubectl rollout history deploy nginx-deployment
deployment.apps/nginx-deployment
REVISION  CHANGE-CAUSE
1         kubectl apply --filename=nginx-test.yaml --record=true
2         kubectl apply --filename=nginx-test.yaml --record=true

您可以使用“kubernetes.io/change-cause”注释更改推出历史记录的 CHANGE-CAUSE：

❯ kubectl annotate deploy nginx-deployment kubernetes.io/change-cause="update image from 1.21.6 to latest" --reco
rd
Flag --record has been deprecated, --record will be removed in the future
deployment.apps/nginx-deployment annotated

让我们重新检查历史：

❯ kubectl rollout history deploy nginx-deployment
deployment.apps/nginx-deployment
REVISION  CHANGE-CAUSE
2         kubectl apply --filename=nginx-test.yaml --record=true
3         update image from 1.21.6 to latest

让我们描述一下部署：

❯ kubectl describe deploy nginx-deploy
Name:                   nginx-deployment
Namespace:              so-tests
CreationTimestamp:      Fri, 06 May 2022 00:56:09 -0300
Labels:                 app=nginx
Annotations:            deployment.kubernetes.io/revision: 3
                        kubernetes.io/change-cause: update image from latest to latest
...

希望这对你有所帮助，bgues。