Depoloymen 回滚/暂停/启动

文章目录

1. 历史记录和回滚

  • 写一个示例
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: nginx-test
  namespace: test
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: nginx-test
    spec:
      containers:
      - name: nginx-test
        image: "harbocto.XXX.com.cn/public/nginx"
        ports:
        - containerPort: 80

创建deployment，等pod启动后，修改成错误的镜像，然后applay一下，pod处于错误状态：

[root@DoM01 deployment]# kubectl get pod -n test
NAME                         READY   STATUS         RESTARTS   AGE
nginx-test-c5c7fccb6-vtbz4   0/1     ErrImagePull   0          1h

然后进行测试如下：

1.1 历史记录

  • 查看历史版本
[root@DoM01 ~]# kubectl rollout -n test history deployment nginx-test
deployment.extensions/nginx-test
REVISION  CHANGE-CAUSE
1         <none>
2         <none>
  • 某一版本详细信息
[root@DoM01 deployment]# kubectl rollout -n test history deployment nginx-test --revision=1
deployment.extensions/nginx-test with revision #1
Pod Template:
  Labels:       app=nginx-test
        pod-template-hash=5f9454646c
  Containers:
   nginx-test:
    Image:      harbocto.XXX.com.cn/public/nginx
    Port:       80/TCP
    Host Port:  0/TCP
    Environment:        <none>
    Mounts:     <none>
  Volumes:      <none>

1.2 撤销本次发布（即回滚到上一版）

  • 回滚到上一版
[root@DoM01 deployment]# kubectl rollout undo -n test deployment/nginx-test
deployment.extensions/nginx-test rolled back
  • 查看可知，pod启动起来了。（如果用edit可以看到镜像已经是第一版的正确镜像了。）
[root@DoM01 deployment]# kubectl get pod -n test
NAME                          READY   STATUS    RESTARTS   AGE
nginx-test-5f9454646c-v6w74   1/1     Running   0          9s
  • 此时查看历史版本，可见刚才的 1版 变成了 3版
[root@DoM01 deployment]# kubectl rollout  history -n test deployment nginx-test
deployment.extensions/nginx-test
REVISION  CHANGE-CAUSE
2         <none>
3         <none>

1.3 回滚到指定版本

添加 –to-revision=1 参数即可

[root@DoM01 deployment]# kubectl rollout -n test undo deployment/nginx-test --to-revision=2

deployment/nginx-test 和 deployment nginx-test 这里是一样的，只是写法不同。

2. 暂停/恢复

2.1 暂停测试

  • 命令
    kubectl rollout pause xxxx
[root@DoM01 deployment]# kubectl rollout pause -n test deployment nginx-test
deployment.extensions/nginx-test paused
  • 查看，如下可见，似乎deployment和pod都没有任何变化
[root@DoM01 deployment]# kubectl get deployments -n test
NAME         READY   UP-TO-DATE   AVAILABLE   AGE
nginx-test   1/1     1            1           7d23h
[root@DoM01 deployment]# kubectl get pod -n test
NAME                          READY   STATUS    RESTARTS   AGE
nginx-test-5f9454646c-v6w74   1/1     Running   0          13m
  • 修改成错误的镜像
[root@DoM01 deployment]# kubectl set image -n test deployment nginx-test nginx-test=nginx:1.15
deployment.extensions/nginx-test image updated
  • 查看可见，仍有一个pod在正常运行。虽然镜像已经是刚才更改的了，但是UP-TO-DATE 却是0。
[root@DoM01 deployment]# kubectl get deployments -n test  -o wide
NAME         READY   UP-TO-DATE   AVAILABLE   AGE     CONTAINERS   IMAGES       SELECTOR
nginx-test   1/1     0            1           7d23h   nginx-test   nginx:1.15   app=nginx-test
  • 查看历史版本
    可见，并没有新的版本产生
[root@DoM01 deployment]# kubectl rollout -n test history deployment nginx-test
deployment.extensions/nginx-test
REVISION  CHANGE-CAUSE
2         <none>
3         <none>

2.2 恢复

  • 命令
    kubectl rollout resume deploy deployment_name
[root@DoM01 deployment]# kubectl rollout resume deploy -n test  nginx-test
deployment.extensions/nginx-test resumed
  • 查看历史版本,多了一个4
[root@DoM01 deployment]# kubectl rollout history -n test deployment nginx-test
deployment.extensions/nginx-test
REVISION  CHANGE-CAUSE
2         <none>
3         <none>
4         <none>

3. 小结

  • 查看历史版本
kubectl rollout history deployment Deployment_Name
  • 查看某版本详细信息
kubectl rollout  history deployment Deployment_Name  --revision=N

添加 ** --revision=N** 参数，N是版本号

  • 回滚到上一版
kubectl rollout undo -n test deployment Deployment_Name
  • 回滚到制定版本
kubectl rollout undo -n test deployment Deployment_Name --to-revision=N

添加 –to-revision=N 参数，N是版本号

  • 暂停
kubectl rollout pause deployment Deployment_Name
  • 恢复
kubectl rollout resume deploy Deployment_Name

在这里插入图片描述

posted on 2021-08-13 10:36  运维开发玄德公  阅读(9)  评论(0)  编辑  收藏  举报  来源

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