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9.8.5. Adding a disk to a virtual machine

You can add a virtual disk to a virtual machine (VM) by using the OpenShift Container Platform web console.

Procedure

  1. Navigate to Virtualization VirtualMachines in the web console.
  2. Select a VM to open the VirtualMachine details page.
  3. On the Disks tab, click Add disk.

  4. Specify the Source, Name, Size, Type, Interface, and Storage Class.

    1. Optional: You can enable preallocation if you use a blank disk source and require maximum write performance when creating data volumes. To do so, select the Enable preallocation checkbox.
    2. Optional: You can clear Apply optimized StorageProfile settings to change the Volume Mode and Access Mode for the virtual disk. If you do not specify these parameters, the system uses the default values from the kubevirt-storage-class-defaults config map.

  5. Click Add.

    참고

    If the VM is running, you must restart the VM to apply the change.

9.8.5.1. Storage fields
링크 복사

To optimize storage performance and ensure data availability for your workloads, configure the storage fields to define the source, size, and disk characteristics of your virtual machine (VM).

FieldDescription

Blank (creates PVC)

Create an empty disk.

Import via URL (creates PVC)

Import content via URL (HTTP or HTTPS endpoint).

Use an existing PVC

Use a PVC that is already available in the cluster.

Clone existing PVC (creates PVC)

Select an existing PVC available in the cluster and clone it.

Import via Registry (creates PVC)

Import content via container registry.

Container (ephemeral)

Upload content from a container located in a registry accessible from the cluster. The container disk should be used only for read-only filesystems such as CD-ROMs or temporary virtual machines.

Name

Name of the disk. The name can contain lowercase letters (a-z), numbers (0-9), hyphens (-), and periods (.), up to a maximum of 253 characters. The first and last characters must be alphanumeric. The name must not contain uppercase letters, spaces, or special characters.

Size

Size of the disk in GiB.

Type

Type of disk. Example: Disk or CD-ROM

Interface

Type of disk device. Supported interfaces are virtIO, SATA, and SCSI.

Storage Class

The storage class that is used to create the disk.

9.8.5.1.1. Advanced storage settings
링크 복사

The following advanced storage settings are optional and available for Blank, Import via URL, and Clone existing PVC disks.

If you do not specify these parameters, the system uses the default storage profile values.

ParameterOptionParameter description

Volume Mode

Filesystem

Stores the virtual disk on a file system-based volume.

Block

Stores the virtual disk directly on the block volume. Only use Block if the underlying storage supports it.

Access Mode

ReadWriteOnce (RWO)

Volume can be mounted as read/write by a single node.

ReadWriteMany (RWX)

Volume can be mounted as read/write by many nodes at one time.

참고

This mode is required for live migration.

ReadOnlyMany (ROX)

Volume can be mounted as read only by many nodes.

참고

ReadWriteMany access mode is required for live migration.

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