Comment 17 for bug 1337821

Reviewed: https://review.openstack.org/112975
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=426d394b77584bb0f9be89e4a11df937448a5087
Submitter: Jenkins
Branch: master

commit 426d394b77584bb0f9be89e4a11df937448a5087
Author: Andrew Laski <email address hidden>
Date: Fri Aug 8 12:59:24 2014 -0400

    Prepend /dev/ to root_device_name in get_next_device_name

    Because the API docs for booting an instance from a volume have shown to
    use 'vda' for a long time, and it has worked, there may be instances
    with root_device_name = 'vda'. These instances will fail a check in
    get_next_device_name when attempting to attach another volume, making
    that impossible. Another patch fixes new block_device_mappings by
    prepending /dev/ when the root_device_name is populated, but this will
    allow incorrectly populated instances to attach volumes.

    Change-Id: I709a195c7e3f559315a2c307de62cbae8b72ac46
    Partial-Bug: #1337821