Comment 6 for bug 1367540

Reviewed: https://review.openstack.org/149822
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=33e0813b22fb996558b51f1cba28dcface8cfed3
Submitter: Jenkins
Branch: stable/juno

commit 33e0813b22fb996558b51f1cba28dcface8cfed3
Author: Matthew Booth <email address hidden>
Date: Thu Sep 25 11:33:49 2014 +0100

    Fix image metadata returned for volumes

    When creating a volume from a glance image, cinder stores the original
    image metadata in volume_glance_metadata. This is a key/value store,
    and all the values are strings.

    When Nova boots an instance from a volume, it passes the image
    metadata returned by cinder, which is all strings. If a driver
    expects these values to be ints, as they are when booting from an
    image, it will get a type error.

    This change also pulls size from the volume directly rather than
    taking the value from the stored image metadata. This is because the
    volume will have been created in 1Gb increments, and is unlikely to be
    the same size as the original image. It may also have been
    subsequently extended.

    Cherry picked from https://review.openstack.org/#/c/124010/

    Closes-Bug: #1367540

    Conflicts:
     nova/compute/api.py
     nova/tests/compute/test_compute.py

    Change-Id: I7928f6be1ca99f1502941b9df2b443f2ca63a37b