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Editing virtual machines - Virtual machines | OpenShift Virtualization | OpenShift Container Platform 4.6
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Editing virtual machines

You can update a virtual machine configuration using either the YAML editor in the web console or the OpenShift client on the command line. You can also update a subset of the parameters in the Virtual Machine Overview of the web console.

Editing a virtual machine in the web console

Edit select values of a virtual machine in the Virtual Machine Overview screen of the web console by clicking on the pencil icon next to the relevant field. Other values can be edited using the cli.

Procedure

  1. click Workloads → Virtualization from the side menu.

  2. click the Virtual Machines tab.

  3. Select a virtual machine to open the Virtual Machine Overview screen.

  4. click the Details tab.

  5. click the pencil icon to make a field editable.

  6. Make the relevant changes and click Save.

If the virtual machine is running, changes to Boot Order or Flavor will not take effect until you restart the virtual machine.

You can view pending changes by clicking View Pending Changes on the right side of the relevant field. The Pending Changes banner at the top of the page displays a list of all changes that will be applied when the virtual machine restarts.

Editing a virtual machine YAML configuration using the web console

Using the web console, edit the YAML configuration of a virtual machine.

Not all parameters can be updated. If you edit values that cannot be changed and click Save, an error message indicates the parameter that was not able to be updated.

The YAML configuration can be edited while the virtual machine is Running, however the changes will only take effect after the virtual machine has been stopped and started again.

Navigating away from the YAML screen while editing cancels any changes to the configuration you have made.
Procedure

  1. click Workloads → Virtualization from the side menu.

  2. click the Virtual Machines tab.

  3. Select a virtual machine to open the Virtual Machine Overview screen.

  4. click the YAML tab to display the editable configuration.

  5. Optional: You can click Download to download the YAML file locally in its current state.

  6. Edit the file and click Save.

A confirmation message shows that the modification has been successful and includes the updated version number for the object.

Editing a virtual machine YAML configuration using the cli

Use this procedure to edit a virtual machine YAML configuration using the cli.

Prerequisites

  • You configured a virtual machine with a YAML object configuration file.

  • You installed the oc cli.

Procedure

  1. Run the following command to update the virtual machine configuration:

    $ oc edit <object_type> <object_ID>

  2. Open the object configuration.

  3. Edit the YAML.

  4. If you edit a running virtual machine, you need to do one of the following:

    • Restart the virtual machine.

    • Run the following command for the new configuration to take effect:

      $ oc apply <object_type> <object_ID>

Adding a virtual disk to a virtual machine

Use this procedure to add a virtual disk to a virtual machine.

Procedure

  1. click Workloads → Virtualization from the side menu.

  2. click the Virtual Machines tab.

  3. Select a virtual machine to open the Virtual Machine Overview screen.

  4. click the Disks tab.

  5. click Add Disk to open the Add Disk window.

  6. In the Add Disk window, specify the Source, Name, Size, Interface, Type, and Storage Class.

    1. Optional: In the Advanced list, specify 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.

  7. click Add.

If the virtual machine is running, the new disk is in the pending restart state and will not be attached until you restart the virtual machine.

The Pending Changes banner at the top of the page displays a list of all changes that will be applied when the virtual machine restarts.

For more information on the kubevirt-storage-class-defaults config map, see Storage defaults for data volumes.

Storage fields

Name Description

Source

Select a blank disk for the virtual machine or choose from the options available: URL, Container, Attach Cloned Disk, or Attach Disk. To select an existing disk and attach it to the virtual machine, choose Attach Cloned Disk or Attach Disk from a list of available persistent volume claims (PVCs).

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 (GiB)

Size, in GiB, of the disk.

Interface

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

Storage Class

The storage class that is used to create the disk.

Advanced → Volume Mode

Defines whether the persistent volume uses a formatted file system or raw block state. Default is Filesystem.

Advanced → Access Mode

Access mode of the persistent volume. Supported access modes are ReadWriteOnce, ReadOnlyMany, and ReadWriteMany.

Advanced storage settings

The following advanced storage settings are available for Blank, Import via URL, and Clone existing PVC disks. These parameters are optional. If you do not specify these parameters, the system uses the default values from the kubevirt-storage-class-defaults config map.

Name Parameter 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

Single User (RWO)

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

Shared Access (RWX)

The disk can be mounted as read/write by many nodes.

This is required for some features, such as live migration of virtual machines between nodes.

Read Only (ROX)

The disk can be mounted as read-only by many nodes.

Adding a network interface to a virtual machine

Use this procedure to add a network interface to a virtual machine.

Procedure

  1. click Workloads → Virtualization from the side menu.

  2. click the Virtual Machines tab.

  3. Select a virtual machine to open the Virtual Machine Overview screen.

  4. click the Network Interfaces tab.

  5. click Add Network Interface.

  6. In the Add Network Interface window, specify the Name, Model, Network, Type, and MAC Address of the network interface.

  7. click Add.

If the virtual machine is running, the new network interface is in the pending restart state and changes will not take effect until you restart the virtual machine.

The Pending Changes banner at the top of the page displays a list of all changes that will be applied when the virtual machine restarts.

Networking fields

Name Description

Name

Name for the network interface controller.

Model

Indicates the model of the network interface controller. Supported values are e1000e and virtio.

Network

List of available network attachment definitions.

Type

List of available binding methods. For the default pod network, masquerade is the only recommended binding method. For secondary networks, use the bridge binding method. The masquerade method is not supported for non-default networks.

MAC Address

MAC address for the network interface controller. If a MAC address is not specified, one is assigned automatically.

Editing CD-ROMs for Virtual Machines

Use the following procedure to configure CD-ROMs for virtual machines.

Procedure

  1. From the Virtual Machines tab, select your virtual machine.

  2. Select the Overview tab.

  3. To add or edit a CD-ROM configuration, click the pencil icon to the right of the CD-ROMs label. The Edit CD-ROM window opens.

    • If CD-ROMs are unavailable for editing, the following message displays: The virtual machine doesn’t have any CD-ROMs attached.

    • If there are CD-ROMs available, you can remove a CD-ROM by clicking -.

  4. In the Edit CD-ROM window, do the following:

    1. Select the type of CD-ROM configuration from the drop-down list for Media Type. CD-ROM configuration types are Container, URL, and Persistent Volume Claim.

    2. Complete the required information for each Type.

    3. When all CD-ROMs are added, click Save.