[Bug 1915734] [magnum/focal] verification still needed

[Brian Murray]

The fix for this bug has been awaiting testing feedback in the -proposed
repository for focal for more than 90 days.  Please test this fix and
update the bug appropriately with the results.  In the event that the
fix for this bug is still not verified 15 days from now, the package
will be removed from the -proposed repository.

** Tags added: removal-candidate

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https://bugs.launchpad.net/bugs/1915734

Title:
  The db-sync command fails with MySQL 8

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive ussuri series:
  Fix Committed
Status in Ubuntu Cloud Archive victoria series:
  Fix Committed
Status in magnum package in Ubuntu:
  Fix Released
Status in magnum source package in Focal:
  Fix Committed
Status in magnum source package in Groovy:
  Won't Fix

Bug description:
  [Impact]

  New installations of OpenStack Magnum with Mysql8 fail with a
  traceback when trying to initialize the database

  [Test Case]

  Use the OpenStack charms to deploy Mggnum on Ubuntu Focal. Using Focal
  is expected to have a traceback and with this change is expected to
  setup successfully.

  [Regression Potential]

  The regression potential for this is minimal as the package currently
  does not work at all with mysql8 which ships with Ubuntu Focal and
  above. This change has already landed into the upstream project, both
  on Master and in their stable branches.

  The proposed change is a cherry-pick from upstream that resolves this
  issue by updating the old migrations to not set constraints that break
  on Mysql8. This only affects new deploys that would normally step
  through all of the old migrations so shouldn't affect running deploys.

  ----------------------------------------------

  The command to do the Magnum DB sync ('magnum-db-manage upgrade')
  fails when using MySQL 8 releases.

  This issue is tracked in the upstream Magnum project at:
  https://storyboard.openstack.org/#!/story/2008488.

  There is a fix already merged on Magnum master branch to fix this:
  https://review.opendev.org/c/openstack/magnum/+/774142

  We need to have this fix included with Magnum distro packages that are
  expected to use MySQL 8. For example, deployments on Ubuntu Focal (or
  higher) are expected to be using MySQL 8 already.

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