Comment 7 for bug 1827690

Reviewed: https://review.opendev.org/c/openstack/charm-barbican/+/756931
Committed: https://opendev.org/openstack/charm-barbican/commit/ca80b266ed831813a2a9ecec84d288ec3f8f5104
Submitter: "Zuul (22348)"
Branch: master

commit ca80b266ed831813a2a9ecec84d288ec3f8f5104
Author: David Ames <email address hidden>
Date: Thu Oct 8 22:55:30 2020 +0000

    Run db sync manually by leader only

    Without db_auto_create = False each barbican-worker attempts to run
    alembic upgrades on the database whenever they start. This leads to
    race conditions that can leave the sate of the database broken
    (multiple alembic version that "overlap").

    This change runs the barbican-manage db upgrade by the leader only
    avoiding the race condition. charms.openstack also handles the
    openstack upgrade process with a call to instance.db_sync.

    Change-Id: I6b9498059c7057b73b1c3db0e355456c38b0510e
    Closes-Bug: #1827690