111 lines
4.2 KiB
Markdown
111 lines
4.2 KiB
Markdown
---
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vssueId: 38
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layout: LearningLayout
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description: 本文描述了如何在 Kubernetes 中暂停 Deployment 的更新，和继续 Deployment 的更新
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---
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# 暂停和继续 Deployment
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[返回 Deployment](./#deployment-概述)
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您可以先暂停 Deployment，然后再触发一个或多个更新，最后再继续（resume）该 Deployment。这种做法使得您可以在暂停和继续中间对 Deployment 做多次更新，而无需触发不必要的滚动更新。
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以我们在 [创建Deployment](./create.html) 中创建的 Deployment 为例。
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<el-tabs type="border-card">
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<el-tab-pane label="使用 kubectl 暂停 Deployment">
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* 执行命令 `kubectl get deployment`，查看 Deployment 信息，输出结果如下所示：
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```
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NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
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nginx 3 3 3 3 1m
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```
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执行命令 `kubectl get rs`，查看 ReplicaSet 信息，输出结果如下所示：
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```
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NAME DESIRED CURRENT READY AGE
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nginx-2142116321 3 3 3 1m
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```
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* 执行命令 `kubectl rollout pause deployment.v1.apps/nginx-deployment` 暂停 Deployment，输出结果如下所示：
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```
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deployment.apps/nginx-deployment paused
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```
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* 执行命令 `kubectl set image deployment.v1.apps/nginx-deployment nginx=nginx:1.9.1`，更新 Deployment 的容器镜像，输出结果如下所示：
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```
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deployment.apps/nginx-deployment image updated
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```
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* 执行命令 `kubectl rollout history deployment.v1.apps/nginx-deployment`，可查看到尚未生成新的 Deployment 版本（revision），输出结果如下所示：
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```
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deployments "nginx"
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REVISION CHANGE-CAUSE
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1 <none>
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```
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* 执行命令 `kubectl get rs` 可查看到没有新的滚动更新开始执行，输出结果如下所示：
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```
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NAME DESIRED CURRENT READY AGE
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nginx-2142116321 3 3 3 2m
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```
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* 如果需要的话，您可以针对 Deployment 执行更多的修改，例如，执行命令 `kubectl set resources deployment.v1.apps/nginx-deployment -c=nginx --limits=cpu=200m,memory=512Mi` 更新其 resource 限制，输出结果如下所示：
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```
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deployment.apps/nginx-deployment resource requirements updated
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```
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* 执行命令 `kubectl describe deployment nginx-deployment`，确保 Deployment 的信息已被正确修改。
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::: tip
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暂停 Deployment 之前的信息当前仍然在起作用，而暂停 Deployment 之后，修改的 Deployment 信息尚未生效，因为该 Deployment 被暂停了。
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:::
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* 最后，执行命令 `kubectl rollout resume deployment.v1.apps/nginx-deployment`，继续（resume）该 Deployment，可使前面所有的变更一次性生效，输出结果如下所示：
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```
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deployment.apps/nginx-deployment resumed
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```
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* 执行命令 `kubectl get rs -w` 观察滚动更新的进展，输出结果如下所示：
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```
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NAME DESIRED CURRENT READY AGE
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nginx-2142116321 2 2 2 2m
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nginx-3926361531 2 2 0 6s
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nginx-3926361531 2 2 1 18s
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nginx-2142116321 1 2 2 2m
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nginx-2142116321 1 2 2 2m
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nginx-3926361531 3 2 1 18s
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nginx-3926361531 3 2 1 18s
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nginx-2142116321 1 1 1 2m
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nginx-3926361531 3 3 1 18s
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nginx-3926361531 3 3 2 19s
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nginx-2142116321 0 1 1 2m
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nginx-2142116321 0 1 1 2m
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nginx-2142116321 0 0 0 2m
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nginx-3926361531 3 3 3 20s
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```
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* 执行命令 `kubectl get rs` 查看 ResultSet 的最终状态，输出结果如下所示：
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```
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NAME DESIRED CURRENT READY AGE
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nginx-2142116321 0 0 0 2m
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nginx-3926361531 3 3 3 28s
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```
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::: tip
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您不能回滚（rollback）一个已暂停的 Deployment，除非您继续（resume）该 Deployment。
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:::
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</el-tab-pane>
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<el-tab-pane label="使用 Kuboard 暂停 Deployment">
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正在撰写中
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</el-tab-pane>
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</el-tabs>
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[返回 Deployment](./#deployment-概述)
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