Comment 10 for bug 1771700

Reviewed: https://review.openstack.org/571425
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=8ea98c56b647526aae7a786531e934eeee7a90a2
Submitter: Zuul
Branch: stable/queens

commit 8ea98c56b647526aae7a786531e934eeee7a90a2
Author: Lee Yarwood <email address hidden>
Date: Thu May 17 09:47:58 2018 +0100

    libvirt: Skip fetching the virtual size of block devices

    In this latest episode of `Which CI job has lyarwood broken today?!` we
    find that I464bc2b88123a012cd12213beac4b572c3c20a56 introduced a
    regression in the nova-lvm experimental job as n-cpu attempted to run
    qemu-img info against block devices as an unprivileged user.

    For the time being we should skip any attempt to use this command
    against block devices until the disk_api layer can make privileged
    calls using privsep.

    Closes-bug: #1771700
    Change-Id: I9653f81ec716f80eb638810f65e2d3cdfeedaa22
    (cherry picked from commit fda48219a378d09a9a363078ba161d7f54e32c0a)