向AKS中的默认存储类添加allowVolumeExpansion: true

Question

文档说：

这些默认存储类不允许您在创建后更新卷大小。若要启用此功能，请将allowVolumeExpansion: true行添加到默认存储类之一，或创建您自己的自定义存储类。可以使用kubectl edit sc命令编辑现有存储类。有关存储类和创建自己的存储类的详细信息，请参阅AKS中应用程序的存储选项。

我尝试在Kubernetes仪表板中编辑default YAML (它看起来就像JSON而不是YAML)：

{
  "kind": "StorageClass",
  "apiVersion": "storage.k8s.io/v1",
  "metadata": {
    "name": "default",
    "selfLink": "/apis/storage.k8s.io/v1/storageclasses/default",
    "uid": "<uid>",
    "resourceVersion": "3891497",
    "creationTimestamp": "2020-02-14T01:34:03Z",
    "labels": {
      "kubernetes.io/cluster-service": "true"
    },
    "annotations": {
      "kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"storage.k8s.io/v1beta1\",\"kind\":\"StorageClass\",\"metadata\":{\"annotations\":{\"storageclass.beta.kubernetes.io/is-default-class\":\"true\"},\"labels\":{\"kubernetes.io/cluster-service\":\"true\"},\"name\":\"default\"},\"parameters\":{\"cachingmode\":\"ReadOnly\",\"kind\":\"Managed\",\"storageaccounttype\":\"Standard_LRS\"},\"provisioner\":\"kubernetes.io/azure-disk\"}\n",
      "storageclass.beta.kubernetes.io/is-default-class": "true"
    }
  },
  "provisioner": "kubernetes.io/azure-disk",
  "parameters": {
    "cachingmode": "ReadOnly",
    "kind": "Managed",
    "storageaccounttype": "Standard_LRS"
  },
  "reclaimPolicy": "Delete",
  "volumeBindingMode": "Immediate",
  "allowVolumeExpansion": "true"
}

其结果是：

StorageClass in version "v1" cannot be handled as a StorageClass: v1.StorageClass.AllowVolumeExpansion: ReadBool: expect t or f, but found ", error found in #10 byte of ...|ansion": "true" }|..., bigger context ...|ingMode": "Immediate", "allowVolumeExpansion": "true" }|...

另外：

{
  "kind": "StorageClass",
  "apiVersion": "storage.k8s.io/v1",
  "metadata": {
    "name": "default",
    "selfLink": "/apis/storage.k8s.io/v1/storageclasses/default",
    "uid": "<uid>",
    "resourceVersion": "3891497",
    "creationTimestamp": "2020-02-14T01:34:03Z",
    "labels": {
      "kubernetes.io/cluster-service": "true"
    },
    "annotations": {
      "kubectl.kubernetes.io/last-applied-configuration": "{\"apiVersion\":\"storage.k8s.io/v1beta1\",\"kind\":\"StorageClass\",\"metadata\":{\"annotations\":{\"storageclass.beta.kubernetes.io/is-default-class\":\"true\"},\"labels\":{\"kubernetes.io/cluster-service\":\"true\"},\"name\":\"default\"},\"parameters\":{\"cachingmode\":\"ReadOnly\",\"kind\":\"Managed\",\"storageaccounttype\":\"Standard_LRS\"},\"provisioner\":\"kubernetes.io/azure-disk\"}\n",
      "storageclass.beta.kubernetes.io/is-default-class": "true"
    }
  },
  "provisioner": "kubernetes.io/azure-disk",
  "parameters": {
    "cachingmode": "ReadOnly",
    "kind": "Managed",
    "storageaccounttype": "Standard_LRS",
    "allowVolumeExpansion": "true"
  },
  "reclaimPolicy": "Delete",
  "volumeBindingMode": "Immediate"
}

其结果是：

StorageClass.storage.k8s.io "default" is invalid: parameters: Forbidden: updates to parameters are forbidden.

还在kubectl edit sc中尝试了以下所有内容

$ kubectl edit sc default allowVolumeExpansion: true          
Error from server (NotFound): storageclasses.storage.k8s.io "allowVolumeExpansion:" not found
Error from server (NotFound): storageclasses.storage.k8s.io "true" not found

$ kubectl edit sc default "allowVolumeExpansion: true"
Error from server (NotFound): storageclasses.storage.k8s.io "allowVolumeExpansion: true" not found

$ kubectl edit sc/default allowVolumeExpansion: true
error: there is no need to specify a resource type as a separate argument when passing arguments in resource/name form (e.g. 'kubectl get resource/<resource_name>' instead of 'kubectl get resource resource/<resource_name>'

$ kubectl edit sc/default "allowVolumeExpansion: true"
error: there is no need to specify a resource type as a separate argument when passing arguments in resource/name form (e.g. 'kubectl get resource/<resource_name>' instead of 'kubectl get resource resource/<resource_name>'

做这件事的正确方法是什么？如果文档中有一个例子的话会很有帮助。

Answer 1

我没有遇到你遇到的问题。allowVolumeExpansion是存储类的属性，而不是参数，它需要布尔值。你可以在StorageClass上看到它。

我认为你设定了它的价值是错误的。在我的测试中，我在YAML文件中添加了如下属性：

allowVolumeExpansion: true

而非

allowVolumeExpansion: "true"

所以我认为你需要把这句话改为：

"allowVolumeExpansion": true