[openstack-dev] [Ironic] Let's move to Alembic

Roman Podoliaka rpodolyaka at mirantis.com
Thu Jan 16 10:34:37 UTC 2014

Hi all,

I'm glad you've decided to drop sqlalchemy-migrate support :)

As for porting Ironic to using of alembic migrations, I believe,
Dmitriy Shulyak already uploaded a proof-of-concept patch to Ironic
before, but it abandoned. Adding Dmitriy to this thread, so he is
notified he can restore his patch and continue his work.


On Thu, Jan 16, 2014 at 5:59 AM, Devananda van der Veen
<devananda.vdv at gmail.com> wrote:
> Hi all,
> Some months back, there was discussion to move Ironic to use Alembic instead
> of SqlAlchemy. At that time, I was much more interested in getting the
> framework together than I was in restructuring our database migrations, and
> what we had was sufficient to get us off the ground.
> Now that the plumbing is coming together, and we're looking hopefully at
> doing a release this cycle, I'd like to see if anyone wants to pick up the
> torch and switch our db migrations to use alembic. Ideally, let's do this
> between the I2 and I3 milestones.
> I am aware of the work adding a transition-to-alembic to Oslo:
> https://review.openstack.org/#/c/59433/
> I feel like we don't necessarily need to wait for that to land. There's a
> lot less history in our migrations than in, say, Nova; we don't yet support
> down-migrations anyway; and there aren't any prior releases of the project
> which folks could upgrade from.
> Thoughts?
> -Deva
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