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Resize an instance via Horizon

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Learn how to resize your instance using the OpenStack Horizon interface.

As a result of increased activity, or simply new needs, your instance may not be able to meet this new burden due to a lack of resources. However, with the Public Cloud, you can increase the resources available to your instance, and this can be done with just a few clicks.

Warning

NOTE: Only upscaling is possible for classic models. In addition, this manipulation causes the instance to be shut down for the time of the operation.

Tip

Flex instances allow resizing to higher or lower models due to a locked single disk size.

 

Requirements

 

Instructions

Log into the Horizon interface, and make sure you are in the correct region. You can verify this in the top left corner.

Horizon select region

Next, click on the Compute menu on the left side and select Instances. Select Resize Instance in the drop-down list for the corresponding instance.

Horizon instances more options

 

Template Selection Tab (Flavor Choice)

This section shows the current template (old flavor) and allows you to select a new template (new flavor) for the instance resource.

 

Flavor Details

In this section, you will see the resources associated with the new template you have chosen.

Horizon flavor - Resize of an instance

 

Project Limits

Under this section, you can view the occupied resources compared with the total resources allocated to the project.

Warning

NOTE: Please note that you cannot switch models when resizing an instance. A resizing can only be done from one Linux model to another Linux model, or from one Windows model to another Windows model.

 

Advanced Options

Use this section to manage the Disk Partition and Server Group.

Once the configuration is complete, click on Resize.

Horizon advance options

 

Resizing a disk in Windows

When performing a resize for a Windows Instance, please note that the partition size is not automatically updated, so you will have to extend it using the disk manager:

  • Right-click on the Start menu and launch the disk manager by clicking on Disk Management:

    Windows disk management

  • Right-click on the main partition, then click on Extend Volume.

    Windows extend volume

  • In the Extend Volume Wizard menu, click on Next to proceed. In the next tab, choose the disk resources to extend and click on Next.

    Windows extend volume wizard configure

    Once done, click on Finish to confirm your choice.

    Windows extend volume wizard finish

  • The new disk size will then be displayed in the disk manager.

    Windows disk manager confirmation

 

Go further

Browse all the Compute guides.

Browse the rest of the OVHcloud US documentation for guides on our other products and services.

Learn more about Public Cloud Compute on the OVHcloud US website.