Docker Kubernetes 容器更新与回滚

Docker Kubernetes 容器更新与回滚

环境：

系统：Centos 7.4 x64
Docker版本：18.09.0
Kubernetes版本：v1.8
管理节点：192.168.1.79
工作节点：192.168.1.78
工作节点：192.168.1.77

创建环境：

1、Deployment名称：nginx-deployment
2、pods副本数为：3
3、image镜像：nginx1.9

更新升级

方案一：管理节点：滚动升级镜像。

kubectl set image deployment nginx-deployment nginx=nginx:1.11

kubectl set image 资源类型/资源名称 容器名称=镜像版本

命令注解

方案二：管理节点：修改原yaml配置文件重新加载完成滚动升级

kubectl apply -f nginx-deployment.yaml

管理节点：查看升级情况

命令：kubectl describe deployment nginx-deployment

# 镜像已更新

    Image:        nginx:1.11

  Type    Reason             Age   From                   Message

  ----    ------             ----  ----                   -------

# 扩容版本

  Normal  ScalingReplicaSet  24m   deployment-controller  Scaled up replica set nginx-deployment-845cfc7fb9 to 3

  Normal  ScalingReplicaSet  49s   deployment-controller  Scaled up replica set nginx-deployment-7ff5df4cfb to 1

# 缩容版本

  Normal  ScalingReplicaSet  34s   deployment-controller  Scaled down replica set nginx-deployment-845cfc7fb9 to 2

# 扩容版本

  Normal  ScalingReplicaSet  34s   deployment-controller  Scaled up replica set nginx-deployment-7ff5df4cfb to 2

# 缩容版本

  Normal  ScalingReplicaSet  18s   deployment-controller  Scaled down replica set nginx-deployment-845cfc7fb9 to 1

# 扩容版本

  Normal  ScalingReplicaSet  18s   deployment-controller  Scaled up replica set nginx-deployment-7ff5df4cfb to 3

# 缩容版本

  Normal  ScalingReplicaSet  15s   deployment-controller  Scaled down replica set nginx-deployment-845cfc7fb9 to 0

查看deployment镜像升级描述信息

命令：kubectl rollout status deployment/nginx-deployment

Waiting for rollout to finish: 1 out of 3 new replicas have been updated...

Waiting for rollout to finish: 1 out of 3 new replicas have been updated...

Waiting for rollout to finish: 1 out of 3 new replicas have been updated...

Waiting for rollout to finish: 2 out of 3 new replicas have been updated...

Waiting for rollout to finish: 2 out of 3 new replicas have been updated...

Waiting for rollout to finish: 2 out of 3 new replicas have been updated...

Waiting for rollout to finish: 1 old replicas are pending termination...

Waiting for rollout to finish: 1 old replicas are pending termination...

deployment "nginx-deployment" successfully rolled out

实时观察发布状态：

命令：kubectl rollout history deployment/nginx-deployment

deployments "nginx-deployment"

REVISION  CHANGE-CAUSE

1         <none>

2         <none>

查看deployment历史修订版本

命令：kubectl rollout history deployment/nginx-deployment --revision=1

deployments "nginx-deployment" with revision #

Pod Template:

  Labels:    app=nginx

    pod-template-hash=4017973965

  Containers:

   nginx:

    Image:    nginx:1.10

    Port:    80/TCP

    Environment:    <none>

    Mounts:    <none>

  Volumes:    <none>

查看指定历史修订版本

版本回滚

管理节点：回滚到上一个版本

kubectl rollout undo deployment nginx-deployment

kubectl rollout undo 资源类型 资源名称

命令注解

管理节点：指定版本回滚

kubectl rollout undo deployment/nginx-deployment --to-revision=3

kubectl rollout undo 资源类型 资源名称 --to-revision=版本号

注：kubectl rollout history 资源类型 资源名称 查看的版本号。

命令注解

管理节点：查看回滚情况

命令：kubectl rollout history deployment/nginx-deployment

deployments "nginx-deployment"

REVISION  CHANGE-CAUSE

1         <none>

2         <none>

4         <none>

5         <none>

注：将还原版本覆盖，并生成新的版本号。

查看deployment历史修订版本

巴特西

Docker Kubernetes 容器更新与回滚

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