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How to resize an instance or volume in Pouta

Resize an instance

Using a snapshot

We might face performance issue with your initial instance and you'd like to run your instance with a bigger flavor?
It's possible to proceed by taking a snapshot of your instance and then boot the new instance with the new flavor using the snapshot.
You can find more information about snapshot here and how to proceed.

Using the resize functionality

Warning

I/O flavors and GPU flavors cannot be resized to a different family flavors. We recommend to use snapshots.

Warning

It's possible to resize from a standard flavor family to a hpc flavor family. Nothing will prevent you to do that but it's highly not recommended!
You may lose data during the process and CSC is not responsible. We recommend to only resize to the flavors of the same family (except for I/O flavors, see above).

In the Actions menu of your instance, choose Resize to begin the process:

resize-button

A window will open. Select the new flavor:

resize-windows

Click Resize

Wait few minutes and during the process, it will ask you to confirm the resize:

confirm-resize

When your instance is in Confirm Resize/Migrate it means that you can connect to your instance to check if everything is working fine because it's already converted into the new flavor.
In the case that you spot something wrong, you can revert to the previous state with the Revert Resize/Migrate button in the drop menu.

Error-label

Be aware that an automatic confirm process will be triggered after three days of pending Confirm or Revert Resize/Migrate status

After the process finished, you should have your instance with a new flavor.

Resize a volume

Notes

You can only extend a volume. Currently, shrink a volume is not supported in Openstack.

Pouta let you create external volumes. If your initial volume is too small, you can resize it.

Note

If your volume is attached to your instance, you must detach it to be able to resize

From the Volumes page, in the Actions menu, click Extend Volume:

resize-volume

A window will open. Enter the new amount of your volume:

resize-volume-window

Click Extend Volume

You should see the new size of your volume.

You can now attach the new volume back to your instance.

Customize disk size when creating the instance

To customize the root disk size during instance creation (instead of using a snapshot), follow these steps:

  1. Go to Project > Compute > Instances and click on Launch Instance.
  2. In the Details section:
  3. Instance Name: Enter a name for your instance.
  4. Flavor: Choose the appropriate flavor, such as standard.tiny (with default 80 GB disk space).
  5. Instance Boot Source: Choose Boot from image (creates a new volume).
  6. Image Name: Select the image you want to use (e.g., AlmaLinux-8).

  7. Device Size: Adjust the size of the root volume to your desired size, as shown in the image (e.g., 200 GB instead of the default 80 GB).

  8. This field allows you to customize the root volume size beyond the flavor's default disk size as shown in figure below.

  9. After configuring the rest of the options (security, networking, etc.), click Launch.

cloud_pouta_resize_custome_disk

If you'd like to extend the volume using a snapshot instead, please visit Volume snapshots for more detailed instructions.