k8s中滚动更新功能实现

逃离我推掉我的手 2022-04-24 18:24 303阅读 0赞

#### 1、deployment中设置拉取镜像策略、拉取镜像权限的秘钥 ####

在deployment中设置以下参数

spec:
          # 拉取镜像权限的秘钥
          imagePullSecrets:
          - name: registry-pull-secret
          containers:
          - name: nginx
            image: nginx:latest
            # 镜像拉取策略
            imagePullPolicy: IfNotPresent
      # @@@@@@@@@@@@@@@@@@@@@
      spec:
      replicas: 3
      strategy:
        type: RollingUpdate
        rollingUpdate:
          maxSurge: 20%
          maxUnavailable: 1
      minReadySeconds: 5
      revisionHistoryLimit: 10 # 设置可记录的版本数

#### 2、保证拉取镜像权限的秘钥在当前deployment的命名空间中 ####

#### 3、滚动更新 ####

cd rollout
    # 使用nginx的1.14.1版本
    kubectl apply -f nginx-deployment.yaml 
    # 对deployment进行扩容
    kubectl -n rollout scale deployment nginx-deployment --replicas=10
    # 通过修改镜像进行版本更新
    kubectl -n rollout set image  deployment/nginx-deployment nginx=test.com/project/nginx:1.15.4
    kubectl -n rollout rollout status deployments/nginx-deployment

![在这里插入图片描述][20190429181026629.png]

# 命名空间是-n rollout 
    kubectl -n rollout rollout undo deployments/nginx-deployment

查看history

kubectl -n rollout rollout history deployments/nginx-deployment
    kubectl rollout undo deployment nginx-deployment --to-revision=5
    # 历史版本记录
    kubectl apply -f nginx-deployment.yaml --record

![在这里插入图片描述][20190429193022750.png]

参考：[https://www.cnblogs.com/justmine/p/8688828.html][https_www.cnblogs.com_justmine_p_8688828.html]  
[http://www.ipcpu.com/2017/09/kubernetes-rolling-update/][http_www.ipcpu.com_2017_09_kubernetes-rolling-update]

[20190429181026629.png]: /images/20220212/856b57a52d1b443cb6587e2165c605bd.png
[20190429193022750.png]: /images/20220212/61f55ec2573444a49c0324a7e1370df0.png
[https_www.cnblogs.com_justmine_p_8688828.html]: https://www.cnblogs.com/justmine/p/8688828.html
[http_www.ipcpu.com_2017_09_kubernetes-rolling-update]: http://www.ipcpu.com/2017/09/kubernetes-rolling-update/