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Update rollingupdateWithZeroDowntime.md

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无痴迷，不成功 2018-04-11 06:49:20 -07:00 committed by GitHub
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@ -10,7 +10,7 @@
>3. 删除旧的replication controller。 >3. 删除旧的replication controller。
##4、演示 ##4、演示
>使用kubectl更新一个已部署的应用程序，并模拟回滚。为了方便分析，将应用程序的pod副本数量设置为10。`kubectl -n k8s-ecoysystem-apps scale deployment helloworldapi --replicas=10` >使用kubectl更新一个已部署的应用程序，并模拟回滚。为了方便分析，将应用程序的pod副本数量设置为10。`kubectl -n k8s-ecoysystem-apps scale deployment helloworldapi --replicas=10`
###4.1. 发布微服务 ### 4.1. 发布微服务
```javascript ```javascript
查看部署列表 查看部署列表
$ kubectl get deployments -n k8s-ecoysystem-apps $ kubectl get deployments -n k8s-ecoysystem-apps
@ -25,7 +25,7 @@ $ kubectl describe pods -n k8s-ecoysystem-apps
$ kubectl -n k8s-ecoysystem-apps set image deployments/helloworldapi helloworldapi=registry.wuling.com/justmine/helloworldapi:v2.3 $ kubectl -n k8s-ecoysystem-apps set image deployments/helloworldapi helloworldapi=registry.wuling.com/justmine/helloworldapi:v2.3
``` ```
![](https://images2018.cnblogs.com/blog/1082769/201804/1082769-20180410154935764-1314470605.png) ![](https://images2018.cnblogs.com/blog/1082769/201804/1082769-20180410154935764-1314470605.png)
###4.2. 验证发布 ### 4.2. 验证发布
```javascript ```javascript
检查rollout状态 检查rollout状态
kubectl -n k8s-ecoysystem-apps rollout status deployments/helloworldapi kubectl -n k8s-ecoysystem-apps rollout status deployments/helloworldapi
@ -34,7 +34,7 @@ kubectl describe pods -n k8s-ecoysystem-apps
``` ```
![](https://images2018.cnblogs.com/blog/1082769/201804/1082769-20180410160924346-999250417.png) ![](https://images2018.cnblogs.com/blog/1082769/201804/1082769-20180410160924346-999250417.png)
从上图可以看到，镜像已经升级到v2.3版本 从上图可以看到，镜像已经升级到v2.3版本
###4.3. 回滚发布 ### 4.3. 回滚发布
```javascript ```javascript
kubectl -n k8s-ecoysystem-apps rollout undo deployments/helloworldapi kubectl -n k8s-ecoysystem-apps rollout undo deployments/helloworldapi
``` ```
@ -44,8 +44,8 @@ kubectl -n k8s-ecoysystem-apps rollout undo deployments/helloworldapi
```javascript ```javascript
kubectl -n k8s-ecoysystem-apps rollout undo deployment/helloworldapi --to-revision=<版次> kubectl -n k8s-ecoysystem-apps rollout undo deployment/helloworldapi --to-revision=<版次>
``` ```
##5、原理 ## 5、原理
###5.1. 部署概况 ### 5.1. 部署概况
![](https://images2018.cnblogs.com/blog/1082769/201804/1082769-20180410164244911-1200541035.png) ![](https://images2018.cnblogs.com/blog/1082769/201804/1082769-20180410164244911-1200541035.png)
上图包含的几个滚动发布过程标量，说明如下： 上图包含的几个滚动发布过程标量，说明如下：
* **DESIRED 最终期望处于READY状态的副本数** * **DESIRED 最终期望处于READY状态的副本数**
@ -53,7 +53,7 @@ kubectl -n k8s-ecoysystem-apps rollout undo deployment/helloworldapi --to-revis
* **UP-TO-DATE 当前完成更新的副本数** * **UP-TO-DATE 当前完成更新的副本数**
* **AVAILABLE 当前可用的副本数** * **AVAILABLE 当前可用的副本数**
###5.2. 部署详情 ### 5.2. 部署详情
```javascript ```javascript
kubectl -n k8s-ecoysystem-apps describe deployment helloworldapi kubectl -n k8s-ecoysystem-apps describe deployment helloworldapi
``` ```