---
title: 改变默认 StorageClass
content_type: task
weight: 90
---

<!-- overview -->
<!--
This page shows how to change the default Storage Class that is used to
provision volumes for PersistentVolumeClaims that have no special requirements.
-->
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。

## {{% heading "prerequisites" %}}

{{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}

<!-- steps -->

<!--
## Why change the default storage class?

Depending on the installation method, your Kubernetes cluster may be deployed with
an existing StorageClass that is marked as default. This default StorageClass
is then used to dynamically provision storage for PersistentVolumeClaims
that do not require any specific storage class. See
[PersistentVolumeClaim documentation](/docs/concepts/storage/persistent-volumes/#persistentvolumeclaims)
for details.
-->
## 为什么要改变默认存储类？

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。
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 
配置存储。更多细节请查看
[PersistentVolumeClaim 文档](/zh-cn/docs/concepts/storage/persistent-volumes/#perspersistentvolumeclaims)。

<!--
The pre-installed default StorageClass may not fit well with your expected workload;
for example, it might provision storage that is too expensive. If this is the case,
you can either change the default StorageClass or disable it completely to avoid
dynamic provisioning of storage.
-->
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。
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。

<!--
Deleting the default StorageClass may not work, as it may be re-created
automatically by the addon manager running in your cluster. Please consult the docs for your installation
for details about addon manager and how to disable individual addons.
-->
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。
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。


<!--
## Changing the default StorageClass
-->
## 改变默认 StorageClass

<!--
1. List the StorageClasses in your cluster:
-->
1. 列出你的集群中的 StorageClass：

   ```shell
   kubectl get storageclass
   ```

   <!--
   The output is similar to this:
   -->
   输出类似这样：

   ```bash
   NAME                 PROVISIONER               AGE
   standard (default)   kubernetes.io/gce-pd      1d
   gold                 kubernetes.io/gce-pd      1d
   ```

   <!--
   The default StorageClass is marked by `(default)`.
   -->
   默认 StorageClass 以 `(default)` 标记。

<!--
1. Mark the default StorageClass as non-default:
-->
2. 标记默认 StorageClass  非默认：
  
   <!--
   The default StorageClass has an annotation
   `storageclass.kubernetes.io/is-default-class` set to `true`. Any other value
   or absence of the annotation is interpreted as `false`.

   To mark a StorageClass as non-default, you need to change its value to `false`:
   -->
   默认 StorageClass 的注解 `storageclass.kubernetes.io/is-default-class` 设置为 `true`。
   注解的其它任意值或者缺省值将被解释为 `false`。

   要标记一个 StorageClass 为非默认的，你需要改变它的值为 `false`： 
   
   ```bash
   kubectl patch storageclass standard -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"false"}}}'
   ```

   <!--
   where `standard` is the name of your chosen StorageClass.
   -->
   这里的 `standard` 是你选择的 StorageClass 的名字。

<!--
1. Mark a StorageClass as default:
-->
3. 标记一个 StorageClass 为默认的：

   <!--
   Similar to the previous step, you need to add/set the annotation
   `storageclass.kubernetes.io/is-default-class=true`.
   -->
   和前面的步骤类似，你需要添加/设置注解 `storageclass.kubernetes.io/is-default-class=true`。

   ```bash
   kubectl patch storageclass <your-class-name> -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
   ```

   <!--
   Please note you can have multiple `StorageClass` marked as default. If more 
   than one `StorageClass` is marked as default, a `PersistentVolumeClaim` without 
   an explicitly defined `storageClassName` will be created using the most recently 
   created default `StorageClass`.
   When a `PersistentVolumeClaim` is created with a specified `volumeName`, it remains 
   in a pending state if the static volume's `storageClassName` does not match the 
   `StorageClass` on the `PersistentVolumeClaim`.
   -->
   请注意，你可以将多个 `StorageClass` 标记为默认值。
   如果存在多个被标记为默认的 `StorageClass`，对于未明确指定 `storageClassName`
   的 `PersistentVolumeClaim`，将使用最近创建的默认 `StorageClass` 进行创建。
   当带有指定 `volumeName` 的 `PersistentVolumeClaim` 被创建时，如果静态卷的
   `storageClassName` 与 `PersistentVolumeClaim` 上的 `StorageClass` 不匹配，
   则该 `PersistentVolumeClaim` 将保持在待处理状态。

<!--
1. Verify that your chosen StorageClass is default:
-->
4. 验证你选用的 StorageClass 为默认的：

   ```bash
   kubectl get storageclass
   ```

   <!--
   The output is similar to this:
   -->
   输出类似这样：

   ```
   NAME             PROVISIONER               AGE
   standard         kubernetes.io/gce-pd      1d
   gold (default)   kubernetes.io/gce-pd      1d
   ```

## {{% heading "whatsnext" %}}

<!--
* Learn more about [PersistentVolumes](/docs/concepts/storage/persistent-volumes/).
-->
* 进一步了解 [PersistentVolume](/zh-cn/docs/concepts/storage/persistent-volumes/)。