Comment 34 for bug 1489581

Reviewed: https://review.openstack.org/241739
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=982bc73f4a4f18ab1a0917e12218d697f9b665a1
Submitter: Jenkins
Branch: master

commit 982bc73f4a4f18ab1a0917e12218d697f9b665a1
Author: Matt Riedemann <email address hidden>
Date: Wed Nov 4 11:48:30 2015 -0800

    Add logging to snapshot_volume_backed method

    The cells job is failing on a race where an image is created
    from an instance with a single volume attached, but we have
    multiple (duplicate) BDMs for the instance so we end up with
    multiple volume snapshots for the image, which later fails a
    boot request using the snapshot image because the image has
    duplicate BDMs with the same boot_index, which is invalid in
    the request.

    This just adds some debug logging when we actually call off to
    cinder to create a volume snapshot so we have the request
    context and instance uuid in the logs for tracing.

    Change-Id: Iba8ad7cf40ba076e90abc8604187700166795c5d
    Related-Bug: #1489581