Public bug reported:
Ubuntu 14.04 using cloud-archive packages upgrading from kilo to liberty
trusty-updates/mitaka/main amd64 Packages
neutron db migration error in prod kilo->liberty upgrade:
# neutron-db-manage upgrade head
Revision havana referenced from havana -> 1cbdb560f806 (head), empty message is
<snip details at http://pastebin.com/D8Pdsvn9 >
packages are additive so system had migrations for 'havana' in
but current neutron-db-manage doesn't know about 'havana' so freaks out.
rm -r /usr/lib/python2.7/dist-packages/neutron/db/migration/alembic_migrations
apt-get install --reinstall python-neutron
then migrations work as expected.
I feel like this is a packaging bug and old migrations should be removed
on upgrade. I could also see this as an upstream bug where code should
at least remember historic version names, but choosing to report here
** Affects: neutron (Ubuntu)
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neutron-db-manage fails when old migrations are present
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