Merge pull request #33593 from zhangxyjlu/volume-populators-beta

[zh]Add 2022-05-16-volume-populators-beta.md

Author: k8s-ci-robot

content/zh/blog/_posts/2022-05-16-volume-populators-beta.md

@@ -0,0 +1,256 @@
+---
+layout: blog
+title: "Kubernetes 1.24: 卷填充器功能进入 Beta 阶段"
+date: 2022-05-16
+slug: volume-populators-beta
+---
+<!--
+layout: blog
+title: "Kubernetes 1.24: Volume Populators Graduate to Beta"
+date: 2022-05-16
+slug: volume-populators-beta
+-->
+
+<!--
+**Author:**
+Ben Swartzlander (NetApp)
+-->
+**作者：**
+Ben Swartzlander (NetApp)
+
+<!--
+The volume populators feature is now two releases old and entering beta! The `AnyVolumeDataSouce` feature
+gate defaults to enabled in Kubernetes v1.24, which means that users can specify any custom resource
+as the data source of a PVC.
+-->
+卷填充器功能现在已经经历两个发行版本并进入 Beta 阶段！
+在 Kubernetes v1.24 中 `AnyVolumeDataSouce` 特性门控默认被启用。
+这意味着用户可以指定任何自定义资源作为 PVC 的数据源。
+
+<!--
+An [earlier blog article](/blog/2021/08/30-volume-populators-redesigned/) detailed how the
+volume populators feature works. In short, a cluster administrator can install a CRD and
+associated populator controller in the cluster, and any user who can create instances of 
+the CR can create pre-populated volumes by taking advantage of the populator.
+-->
+[之前的一篇博客](/blog/2021/08/30-volume-populators-alpha/)详细介绍了卷填充器功能的工作原理。
+简而言之，集群管理员可以在集群中安装 CRD 和相关的填充器控制器，
+任何可以创建 CR 实例的用户都可以利用填充器创建预填充卷。
+
+<!--
+Multiple populators can be installed side by side for different purposes. The SIG storage
+community is already seeing some implementations in public, and more prototypes should
+appear soon.
+-->
+出于不同的目的，可以一起安装多个填充器。存储 SIG 社区已经有了一些公开的实现，更多原型应该很快就会出现。
+
+<!--
+Cluster administrations are **strongly encouraged** to install the
+volume-data-source-validator controller and associated `VolumePopulator` CRD before installing
+any populators so that users can get feedback about invalid PVC data sources.
+-->
+**强烈建议**集群管理人员在安装任何填充器之前安装 volume-data-source-validator 控制器和相关的
+`VolumePopulator` CRD，以便用户可以获得有关无效 PVC 数据源的反馈。
+
+<!--
+## New Features
+-->
+## 新功能
+
+<!--
+The [lib-volume-populator](https://github.com/kubernetes-csi/lib-volume-populator) library
+on which populators are built now includes metrics to help operators monitor and detect
+problems. This library is now beta and latest release is v1.0.1.
+-->
+构建填充器的 [lib-volume-populator](https://github.com/kubernetes-csi/lib-volume-populator)
+库现在包含可帮助操作员监控和检测问题的指标。这个库现在是 beta 阶段，最新版本是 v1.0.1。
+
+<!--
+The [volume data source validator](https://github.com/kubernetes-csi/volume-data-source-validator)
+controller also has metrics support added, and is in beta. The `VolumePopulator` CRD is
+beta and the latest release is v1.0.1.
+-->
+[卷数据源校验器](https://github.com/kubernetes-csi/volume-data-source-validator)控制器也添加了指标支持，
+处于 beta 阶段。`VolumePopulator` CRD 是 beta 阶段，最新版本是 v1.0.1。
+
+<!--
+## Trying it out
+-->
+## 尝试一下
+
+<!--
+To see how this works, you can install the sample "hello" populator and try it
+out.
+-->
+要查看它是如何工作的，你可以安装 “hello” 示例填充器并尝试一下。
+
+<!--
+First install the volume-data-source-validator controller.
+-->
+首先安装 volume-data-source-validator 控制器。
+
+```shell
+kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/volume-data-source-validator/v1.0.1/client/config/crd/populator.storage.k8s.io_volumepopulators.yaml
+kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/volume-data-source-validator/v1.0.1/deploy/kubernetes/rbac-data-source-validator.yaml
+kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/volume-data-source-validator/v1.0.1/deploy/kubernetes/setup-data-source-validator.yaml
+```
+<!--
+Next install the example populator.
+-->
+接下来安装 hello 示例填充器。
+
+```shell
+kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/lib-volume-populator/v1.0.1/example/hello-populator/crd.yaml
+kubectl apply -f https://raw.githubusercontent.com/kubernetes-csi/lib-volume-populator/87a47467b86052819e9ad13d15036d65b9a32fbb/example/hello-populator/deploy.yaml
+```
+<!--
+Your cluster now has a new CustomResourceDefinition that provides a test API named Hello.
+Create an instance of the `Hello` custom resource, with some text:
+-->
+你的集群现在有一个新的 CustomResourceDefinition，它提供了一个名为 Hello 的测试 API。
+创建一个 `Hello` 自定义资源的实例，内容如下：
+
+```yaml
+apiVersion: hello.example.com/v1alpha1
+kind: Hello
+metadata:
+  name: example-hello
+spec:
+  fileName: example.txt
+  fileContents: Hello, world!
+```
+<!--
+Create a PVC that refers to that CR as its data source.
+-->
+创建一个将该 CR 引用为其数据源的 PVC。
+
+```yaml
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: example-pvc
+spec:
+  accessModes:
+  - ReadWriteOnce
+  resources:
+    requests:
+      storage: 10Mi
+  dataSourceRef:
+    apiGroup: hello.example.com
+    kind: Hello
+    name: example-hello
+  volumeMode: Filesystem
+```
+<!--
+Next, run a Job that reads the file in the PVC.
+-->
+接下来，运行一个读取 PVC 中文件的 Job。
+
+```yaml
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: example-job
+spec:
+  template:
+    spec:
+      containers:
+        - name: example-container
+          image: busybox:latest
+          command:
+            - cat
+            - /mnt/example.txt
+          volumeMounts:
+            - name: vol
+              mountPath: /mnt
+      restartPolicy: Never
+      volumes:
+        - name: vol
+          persistentVolumeClaim:
+            claimName: example-pvc
+```
+<!--
+Wait for the job to complete (including all of its dependencies).
+-->
+等待 Job 完成（包括其所有依赖项）。
+
+```shell
+kubectl wait --for=condition=Complete job/example-job
+```
+
+<!--
+And last examine the log from the job.
+-->
+最后检查 Job 中的日志。
+
+```shell
+kubectl logs job/example-job
+```
+<!--
+The output should be:
+-->
+输出应该是：
+
+```terminal
+Hello, world!
+```
+<!--
+Note that the volume already contained a text file with the string contents from
+the CR. This is only the simplest example. Actual populators can set up the volume
+to contain arbitrary contents.
+-->
+请注意，该卷已包含一个文本文件，其中包含来自 CR 的字符串内容。这只是最简单的例子。
+实际填充器可以将卷设置为包含任意内容。
+
+<!--
+## How to write your own volume populator
+-->
+## 如何编写自己的卷填充器
+
+<!--
+Developers interested in writing new poplators are encouraged to use the
+[lib-volume-populator](https://github.com/kubernetes-csi/lib-volume-populator) library
+and to only supply a small controller wrapper around the library, and a pod image
+capable of attaching to volumes and writing the appropriate data to the volume.
+-->
+鼓励有兴趣编写新的填充器的开发人员使用
+[lib-volume-populator](https://github.com/kubernetes-csi/lib-volume-populator) 库，
+只提供一个小型控制器，以及一个能够连接到卷并向卷写入适当数据的 Pod 镜像。
+
+<!--
+Individual populators can be extremely generic such that they work with every type
+of PVC, or they can do vendor specific things to rapidly fill a volume with data
+if the volume was provisioned by a specific CSI driver from the same vendor, for
+example, by communicating directly with the storage for that volume.
+-->
+单个填充器非常通用，它们可以与所有类型的 PVC 一起使用，
+或者如果卷是来自同一供应商的特定 CSI 驱动程序供应的，
+它们可以执行供应商特定的的操作以快速用数据填充卷，例如，通过通信直接使用该卷的存储。
+
+<!--
+## How can I learn more?
+-->
+## 我怎样才能了解更多？
+
+<!--
+The enhancement proposal,
+[Volume Populators](https://github.com/kubernetes/enhancements/tree/master/keps/sig-storage/1495-volume-populators), includes lots of detail about the history and technical implementation
+of this feature.
+-->
+增强提案，
+[卷填充器](https://github.com/kubernetes/enhancements/tree/master/keps/sig-storage/1495-volume-populators)，
+包含有关此功能的历史和技术实现的许多详细信息。
+
+<!--
+[Volume populators and data sources](/docs/concepts/storage/persistent-volumes/#volume-populators-and-data-sources), within the documentation topic about persistent volumes,
+explains how to use this feature in your cluster.
+-->
+[卷填充器与数据源](/zh/docs/concepts/storage/persistent-volumes/#volume-populators-and-data-sources),
+在有关持久卷的文档主题中，解释了如何在集群中使用此功能。
+
+<!--
+Please get involved by joining the Kubernetes storage SIG to help us enhance this
+feature. There are a lot of good ideas already and we'd be thrilled to have more!
+-->
+请加入 Kubernetes 的存储 SIG，帮助我们增强这一功能。这里已经有很多好的主意了，我们很高兴能有更多！
+