[Bug 1871332] Please test proposed package

[Corey Bryant]

Hello Erik, or anyone else affected,

Accepted designate into stein-proposed. The package will build now and
be available in the Ubuntu Cloud Archive in a few hours, and then in the
-proposed repository.

Please help us by testing this new package. To enable the -proposed
repository:

  sudo add-apt-repository cloud-archive:stein-proposed
  sudo apt-get update

Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-stein-needed to verification-stein-done. If it does
not fix the bug for you, please add a comment stating that, and change
the tag to verification-stein-failed. In either case, details of your
testing will help us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in
advance!

** Changed in: cloud-archive/stein
       Status: Triaged => Fix Committed

** Tags added: verification-stein-needed

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https://bugs.launchpad.net/bugs/1871332

Title:
  Many records created at the same time may lead to a race condition

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive stein series:
  Fix Committed
Status in Ubuntu Cloud Archive train series:
  Fix Committed
Status in Designate:
  Fix Released
Status in designate package in Ubuntu:
  Fix Released
Status in designate source package in Focal:
  Fix Released

Bug description:
  [Impact]

   * When multiple records are created at the very same time the
     serial number may not be updated properly. This is especially
     easy to reproduce with the designate-sink and creating 2+ VMs
     at the same time.

   * The fix is included in the upstream Stein branch but is not
     included in any Stein release.

  [Test Plan]

   * Create multiple DNS recordsets in parallel and verify that
     they are all included in the DNS zone on the backend DNS
     server. It is important to created those recordsets very close
     in time so that the bug is triggered. Using a deployment
     mechanism such as Terraform might help.

  [Where problems could occur]

   * The upstream fix introduces a central lock which prevents the
     bug but also leads to performance degradation because this
     lock functions as a parallel barrier.

  [Original description]

  When multiple records are created at the very same time the serial
  number may not be updated properly. This is especially easy to
  reproduce with the designate-sink and creating 2+ VMs at the same
  time.

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