Comment 4 for bug 1213880

Reviewed: https://review.openstack.org/42640
Committed: http://github.com/openstack/glance/commit/1414c3fa8e12604a35e2c299dcac13830a419aaf
Submitter: Jenkins
Branch: master

commit 1414c3fa8e12604a35e2c299dcac13830a419aaf
Author: Edward Hope-Morley <email address hidden>
Date: Mon Aug 19 14:22:11 2013 +0100

    Add rbd store support for zero size image

    If glanceclient does not provide image size to RBD store add() it
    will create a zero-size image and fail when writing to it. If
    provided with zero size we now work out the size of each chunk
    being written and resize the rbd image prior to each write. This
    will be much slower than if new the image size on create but it
    will at least work.

    There is a corresponding glanceclient fix to ensure content-length
    is set if known by the glanceclient, see bug 1220197

    Change-Id: I014c4b71c77c92b9876786d1ba438cdb90f83233
    Fixes: bug #1213880