resource tracker reports negative value for free hard disk space

[Michael Turek]

When overcommiting on hard disk usage, the audit logs report negative amounts of free disk space. While technically correct, it may confuse the user, or make the user think there is something wrong with the tracking.

The patch to fix this will be in a similar vein to https://review.openstack.org/#/c/93261/

[Michael Turek (mjturek)]

while I have a patch prepped for this, I don't plan to submit it until the related patch (linked in the description) is approved. If the related patch doesn't get approved, this patch would probably not be a good idea.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/113342

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/113342
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=d2ab9079ada5135598a89aa65f3ef8b63bf28003
Submitter: Jenkins
Branch: master

commit d2ab9079ada5135598a89aa65f3ef8b63bf28003
Author: Michael Turek <email address hidden>
Date: Mon Aug 11 18:22:13 2014 +0000

    Adjust audit logs to avoid negative disk info

    When requesting more disk than is available, the audit
    logs will report negative values. This may confuse the
    user or make him/her think the tracking is innaccurate.

    This patch seeks to remove any confusion. It is in the
    same vein as https://review.openstack.org/#/c/93261/
    which addresses the same issue in regards to cpu and
    memory audit logs.

    Change-Id: I184985573b20144717ac40f1f3c26709030d5a03
    Closes-bug: #1350542