Error: Failure prepping block device

  • by Blue Box Support June 14th, 2016
  • Tags:

    • troubleshooting

    • nova

    • glance

    • cinder

When booting a new instance using ‘Boot from image (creates a new volume)’, you may experience the following error:

Failed to perform requested operation on instance "test-instance", the instance has an error
status: Please try again later [Error: Build of instance c57f6717-a0fc-4c26-960a-66a958a4ba3d
aborted: Failure prepping block device.].

This is caused by a known bug in Nova. To remedy this issue, you can do the following:

  1. Create a new volume manually, specifying your image to be copied into the volume.
  2. Set that volume to be bootable via Cinder
  3. Create a new instance with “Boot from volume”