This documentation is for the most recent version of Anthos clusters on Azure, released on November 3rd. See the Release notes for more information.
Stay organized with collections Save and categorize content based on your preferences.

Import a preexisting Azure Disk volume

If you already have an Azure Disk volume to use with Anthos clusters on Azure, you can create a PersistentVolume (PV) object and reserve it for a specific PersistentVolumeClaim (PVC).

This page explains how to create a PV by using an existing volume populated with data, and how to use the PV in a Pod.

Before you begin

Create a PersistentVolume for a pre-existing volume

You can import an existing volume by specifying a new PV.

  1. Copy the following YAML into a file named existing-volume.yaml.:

    apiVersion: v1
    kind: PersistentVolume
      name: VOLUME_NAME
        storage: VOLUME_CAPACITY
        - ReadWriteOnce
      persistentVolumeReclaimPolicy: Retain
      storageClassName: STORAGE_CLASS_NAME
        name: my-pvc
        namespace: default
        volumeHandle: /subscriptions/SUBSCRIPTION_ID/resourcegroups/RESOURCE_GROUP_NAME/providers/microsoft.compute/disks/DISK_NAME
        fsType: FILE_SYSTEM_TYPE

    Replace the following:

    • VOLUME_NAME: a name for the volume
    • VOLUME_CAPACITY: size of the volume. For example, 30Gi. For more information on specifying volume capacity in Kubernetes, see the Meaning of memory.
    • STORAGE_CLASS_NAME: the name of the StorageClass that provisions the volume. For example, you can use the default standard-rwo.

    • SUBSCRIPTION_ID: the Azure subscription ID that contains the volume.

    • RESOURCE_GROUP_NAME: the Azure resource group that contains the volume.

    • DISK_NAME: the Azure Disk name of the volume.

    • FS_TYPE: the file system type of the volume. For example, ext4.

  2. Apply the YAML to your cluster

    kubectl apply -f existing-volume.yaml
  3. Confirm the creation of your PV

    kubectl describe pv VOLUME_NAME

    The output of this command contains the status of the PV.

Use the volume with a PersistentVolumeClaim and Pod

After you have imported your volume, you can create a PVC and a Pod that mounts the PVC.

  1. The following YAML creates a PVC and attaches it to a Pod running the Nginx web server. Copy it into a file named nginx.yaml:

    apiVersion: v1
    kind: PersistentVolumeClaim
      name: my-pvc
      storageClassName: STORAGE_CLASS_NAME
      volumeName: VOLUME_NAME
        - ACCESS_MODE
          storage: VOLUME_CAPACITY
    apiVersion: v1
    kind: Pod
      name: web-server
       - name: web-server
         image: nginx
           - mountPath: /var/lib/www/html
             name: data
       - name: data
           claimName: my-pvc

    Replace the following:

    • STORAGE_CLASS: the name of the StorageClass from the PersistentVolume you created previously. For example, standard-rwo.
    • ACCESS_MODE: the access mode of the volume. For Azure Disk, use ReadWriteOnce. For Azure File, use ReadWriteMany.
    • VOLUME_CAPACITY: size of the volume. For example, 30Gi.
  2. Apply the YAML to your cluster

    kubectl apply -f nginx.yaml
  3. Check the status of your Nginx instance with kubectl describe. The output should have a STATUS of Running.

    kubectl describe pod web-server

What's next