[Bug 1697729] Re: port allocator allocates the same SPICE port for multiple guests (race condition)

[ChristianEhrhardt]

Thanks for all the pre-work Aaron!
Thanks James for refiling against libvirt and pinging me.

Lets test in a ppa and run all sorts of regression tests against it this week.
If all works out I should be able to push to Artful early next week and consider SRUs from there.

For now I build the fix in a ppa at [1] (atm still building).
If one could please test that PPA against your original case that would be great.

Also if you want to help please help me adding a SRU template here, you
can find an empty one at [2] and every bit you can fill helps me to get
that fixed sooner.

[1]: https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/2815
[2]: https://wiki.ubuntu.com/StableReleaseUpdates#SRU_Bug_Template

** Changed in: libvirt (Ubuntu Artful)
     Assignee: (unassigned) => ChristianEhrhardt (paelzer)

** Changed in: libvirt (Ubuntu Artful)
       Status: Triaged => In Progress

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https://bugs.launchpad.net/bugs/1697729

Title:
  port allocator allocates the same SPICE port for multiple guests (race
  condition)

Status in Ubuntu Cloud Archive:
  Triaged
Status in Ubuntu Cloud Archive ocata series:
  Triaged
Status in Ubuntu Cloud Archive pike series:
  Triaged
Status in libvirt package in Ubuntu:
  In Progress
Status in libvirt source package in Zesty:
  Triaged
Status in libvirt source package in Artful:
  In Progress

Bug description:
  Using the UCA ocata release of libvirt we sporatically recieve this
  error message in nova-compute.log:

  2017-06-12 14:32:54.359 19007 ERROR nova.compute.manager [instance:
  d1af2a13-0a53-4d9c-ada3-683e4973f28a] libvirtError: internal error:
  process exited while connecting to monitor: ((null):63256): Spice-
  Warning **: reds.c:2463:reds_init_socket: reds_init_socket: binding
  socket to 10.141.112.21:5900 failed

  Please backport the fix for the following bug into UCA ocata/pike releases:
  https://bugzilla.redhat.com/show_bug.cgi?id=1397440

  The patch is documented here:
  https://www.spinics.net/linux/fedora/libvir/msg144093.html

  We've tested backporting this same fix using the ocata UCA libvirt
  2.5.0-3ubuntu5~cloud0 source package and it fixes the problem for us.

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