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Resizing an instance

It is possible to resize an existing instance. To do so, please follow the steps below.

Note

An instance can only be resized to a flavor with a disk size equal or larger to the existing one. To use a flavor with a smaller disk size, you will need to create a new instance.

To resize an instance:

  1. The resize procedure requires that your instance be shutdown and rebooted. Ensure that your instance is ready to be shutdown. If necessary, connect to your instance and stop any running processes.

  2. Login to the Anvil Dashboard at https://anvil.unl.edu with your HCC credentials.

  3. Click Instances in the menu on the left and locate your instance.
    HCC Anvil screen with Instances circled

  4. If you have important data in your instance and want to protect against possible data loss, take a snapshot of the image.

    1. To take a snapshot, clicking the Create Snapshot button on the right hand side of your image in the list.

      Instances window with Create Snapshot button circled

    2. Enter an identifiable name for your snapshot and click Create Snapshot. Create Snapshot window with prompting to 'enter a name' in the Snapshot Name field, with the Create Snapshot button circled

    3. You will be taken to the Images page, where your snapshot will be Queued. Wait until the image has finished saving, as indicated by the Status changing to Active Images panel with the Active Status circled

    4. Return to the Instance list by clicking Instances in the left hand menu.

  5. Click the down arrow next to the Create Snapshot button and click Resize Instance in the menu. Actions dropdown with Resize Instance circled

  6. Select the desired New Flavor and click the Resize button. Resize Instance window with prompting to 'select a new flavor to use' for the New Flavor dropdown, with the Resize button circled

  7. Wait until the instance is resized as indicated by the status "Confirm or Revert Resize/Migrate". Click the Confirm Resize/Migrate button to finalize the resize. Instances example with Confirm Resize/Migrate circled under Actions

At this point, your instance should have a status of Active. Connect to your instance and ensure that everything works as expected.

Warning

If your instance ends in an "Error" state or you have any issues or questions with resizing, please contact us at hcc-support@unl.edu for assistance.