155 lines
5.2 KiB
Markdown
155 lines
5.2 KiB
Markdown
---
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title: 改变默认 StorageClass
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content_type: task
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---
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<!-- overview -->
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<!--
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This page shows how to change the default Storage Class that is used to
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provision volumes for PersistentVolumeClaims that have no special requirements.
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-->
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本文展示了如何改变默认的 Storage Class，它用于为没有特殊需求的 PersistentVolumeClaims 配置 volumes。
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## {{% heading "prerequisites" %}}
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{{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
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<!-- steps -->
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<!--
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## Why change the default storage class?
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Depending on the installation method, your Kubernetes cluster may be deployed with
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an existing StorageClass that is marked as default. This default StorageClass
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is then used to dynamically provision storage for PersistentVolumeClaims
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that do not require any specific storage class. See
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[PersistentVolumeClaim documentation](/docs/concepts/storage/persistent-volumes/#persistentvolumeclaims)
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for details.
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-->
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## 为什么要改变默认存储类？
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取决于安装模式，你的 Kubernetes 集群可能和一个被标记为默认的已有 StorageClass 一起部署。
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这个默认的 StorageClass 以后将被用于动态的为没有特定存储类需求的 PersistentVolumeClaims
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配置存储。更多细节请查看
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[PersistentVolumeClaim 文档](/zh/docs/concepts/storage/persistent-volumes/#perspersistentvolumeclaims)。
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<!--
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The pre-installed default StorageClass may not fit well with your expected workload;
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for example, it might provision storage that is too expensive. If this is the case,
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you can either change the default StorageClass or disable it completely to avoid
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dynamic provisioning of storage.
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-->
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预先安装的默认 StorageClass 可能不能很好的适应你期望的工作负载；例如，它配置的存储可能太过昂贵。
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如果是这样的话，你可以改变默认 StorageClass，或者完全禁用它以防止动态配置存储。
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<!--
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Deleting the default StorageClass may not work, as it may be re-created
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automatically by the addon manager running in your cluster. Please consult the docs for your installation
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for details about addon manager and how to disable individual addons.
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-->
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删除默认 StorageClass 可能行不通，因为它可能会被你集群中的扩展管理器自动重建。
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请查阅你的安装文档中关于扩展管理器的细节，以及如何禁用单个扩展。
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<!--
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## Changing the default StorageClass
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-->
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## 改变默认 StorageClass
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<!--
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1. List the StorageClasses in your cluster:
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-->
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1. 列出你的集群中的 StorageClasses：
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```shell
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kubectl get storageclass
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```
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输出类似这样：
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```bash
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NAME PROVISIONER AGE
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standard (default) kubernetes.io/gce-pd 1d
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gold kubernetes.io/gce-pd 1d
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```
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默认 StorageClass 以 `(default)` 标记。
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<!--
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1. Mark the default StorageClass as non-default:
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-->
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2. 标记默认 StorageClass 非默认：
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<!--
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The default StorageClass has an annotation
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`storageclass.kubernetes.io/is-default-class` set to `true`. Any other value
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or absence of the annotation is interpreted as `false`.
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To mark a StorageClass as non-default, you need to change its value to `false`:
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-->
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默认 StorageClass 的注解 `storageclass.kubernetes.io/is-default-class` 设置为 `true`。
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注解的其它任意值或者缺省值将被解释为 `false`。
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要标记一个 StorageClass 为非默认的，你需要改变它的值为 `false`：
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```bash
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kubectl patch storageclass standard -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"false"}}}'
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```
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<!--
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where `standard` is the name of your chosen StorageClass.
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-->
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这里的 `standard` 是你选择的 StorageClass 的名字。
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<!--
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1. Mark a StorageClass as default:
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-->
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3. 标记一个 StorageClass 为默认的：
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<!--
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Similar to the previous step, you need to add/set the annotation
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`storageclass.kubernetes.io/is-default-class=true`.
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-->
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和前面的步骤类似，你需要添加/设置注解 `storageclass.kubernetes.io/is-default-class=true`。
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```bash
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kubectl patch storageclass <your-class-name> -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
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```
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<!--
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Please note that at most one StorageClass can be marked as default. If two
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or more of them are marked as default, a `PersistentVolumeClaim` without
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`storageClassName` explicitly specified cannot be created.
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-->
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请注意，最多只能有一个 StorageClass 能够被标记为默认。
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如果它们中有两个或多个被标记为默认，Kubernetes 将忽略这个注解，
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也就是它将表现为没有默认 StorageClass。
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<!--
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1. Verify that your chosen StorageClass is default:
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-->
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4. 验证你选用的 StorageClass 为默认的：
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```bash
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kubectl get storageclass
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```
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<!--
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The output is similar to this:
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-->
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输出类似这样：
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```
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NAME PROVISIONER AGE
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standard kubernetes.io/gce-pd 1d
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gold (default) kubernetes.io/gce-pd 1d
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```
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## {{% heading "whatsnext" %}}
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<!--
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* Learn more about [PersistentVolumes](/docs/concepts/storage/persistent-volumes/).
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-->
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* 进一步了解 [PersistentVolumes](/zh/docs/concepts/storage/persistent-volumes/)
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