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

Monty Taylor mordred at inaugust.com
Thu Jan 16 00:24:21 UTC 2014

On 01/15/2014 07:59 PM, Devananda van der Veen 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.

Since Ironic is just now hitting feature parity, I'm pretty sure there 
are no production deployments of it (or even long-running test 
deployments) I say make a clean break before the I3 milestone and 
consider that the "must always upgrade cleanly from here" place.

But I'm probably crazy.

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