Comment 22 for bug 1550919

Reviewed: https://review.opendev.org/631294
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=90e0e874bde38937380d09ab27a7defbb5475cc2
Submitter: Zuul
Branch: master

commit 90e0e874bde38937380d09ab27a7defbb5475cc2
Author: Matthew Booth <email address hidden>
Date: Tue Aug 14 16:05:11 2018 +0100

    Add functional test for bug 1550919

    This adds a failing test, which we fix in change I76448196.

    An earlier version of this change was previously merged as
    change I5619728d. This was later reverted, as it was failing in the
    gate. However, on inspection these failures seem to have been simply
    timeouts due to load.

    Changes from previous version:

    - Increase the timeouts which were previously triggering, and
      serialise server creation to reduce the chance of this recurring.
    - Add an LVM test, which highlights the requirement to flag the
      creation of ephemeral and swap disks.
    - Add an Qcow2 test, essentially the same as the Flat test but ensures
      coverage of the most common backends.
    - Each test now uses a separate instances_path allowing for cleanup
      without racing against other active tests.
    - Some nits addressed.

    For the time being this test does not make use of the recently improved
    nova.tests.functional.libvirt.base.ServersTestBase class to ease
    backports. Future changes should be made to use this class removing some
    of the common setUp logic from _LibvirtEvacuateTest.

    Co-Authored-By: Lee Yarwood <email address hidden>
    Related-Bug: #1550919
    Change-Id: I1062b3e74382734edbb2142a09ff0073c66af8db