Comment 5 for bug 1469179

Reviewed: https://review.openstack.org/170243
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=8cf2d41344785a0752fbfe8745032aed2ec11e27
Submitter: Jenkins
Branch: master

commit 8cf2d41344785a0752fbfe8745032aed2ec11e27
Author: Feodor Tersin <email address hidden>
Date: Mon Jul 6 21:42:14 2015 +0300

    Fix collection of metadata for a snapshot of a volume-backed instance

    Currently the snapshot derives its properties from the instance source:
    an other snapshot or a bootable volume. But that sources could be
    changed since the instance was booted.

    To make instance snapshots independent of source changes this patch
    collects metadata from instance system metadata rather than the sources.

    Since it brings the only way to initialize image metadata, it fixes:
    a) min_ram attribute is not inherited from a bootable volume
    (LP #1369854).
    b) empty container_format and disk_format attribute are inherited from a
    source instance snapshot (LP #1439819).

    Closes-Bug: #1369854
    Closes-Bug: #1439819
    Related-Bug: #1469179
    Change-Id: I067f66356a5ebd738add1591a0069d8049f35c24