Can't create big image if store is a cinder with specific backend

[Andrey Pavlov]

Configuration:
1) glance is configured to store images in cinder.
2) cinder's backend is a ScaleIO.

Description:
ScaleIO creates volumes with size divided by 8Gb. And if client wants to create 1Gb cinder will create volume of 8Gb anyway.
glance store creates 1Gb volume for uploading image. If image is bigger it extends volume by 1Gb.

In this case cinder throws an error "New size for extend must be greater than current size. (current: 8, extended 2)."

glance store should check real voluume size after creation and extends volume only if it's needed.

cinder behavior was changed in Newton release.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/401277

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/401277
Committed: https://git.openstack.org/cgit/openstack/glance_store/commit/?id=f1afda393d8bfafd92b26a445452ab4c74912f0e
Submitter: Jenkins
Branch: master

commit f1afda393d8bfafd92b26a445452ab4c74912f0e
Author: Andrey Pavlov <email address hidden>
Date: Wed Nov 23 17:02:14 2016 +0300

    take into consideration created volume size in cinder backend

    cinder can create bigger volumes than requested.
    also cinder can extend volume to bigger size than requested.
    cinder driver should take in into consideration.

    Closes-Bug: #1644177
    Change-Id: Ic0c0bc31193eaa28fb32fb5e13c4bceeeb11ae2b

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/newton
Review: https://review.openstack.org/410547

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/glance_store 0.19.0 release.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Andrey Pavlov (<email address hidden>) on branch: stable/newton
Review: https://review.openstack.org/410547
Reason: Good job...