[Pulp-list] Developers: Action Required: The migration that pulp_rpm now has, and what it means for devs

[Jay Dobies]

On 11/14/2012 08:49 AM, Lukas Zapletal wrote:
> Is this something only developers must do, or this is gonna be the
> official way to upgrade Pulp from now on.
>
> I am asking because I am curious what should be put into our Katello
> migration script for the next release instead of plain and simple
> "pulp-migrate".

Yes, this is the new version of pulp-migrate. It will be run on every 
upgrade.

> THanks
>
> On Thu, Nov 08, 2012 at 09:26:28AM -0500, Randy Barlow wrote:
>> Good morning! The pulp_rpm project now has one migration, whereas it
>> had no migration module at all before. If you are a developer and
>> you wish to apply this migration, you will need to take the
>> following steps:
>>
>> 1) $ pulp-manage-db
>>
>> 2) $ mongo pulp_database
>>
>> 3) > db.migration_trackers.update({'name': 'pulp_rpm.migrations'},
>> {'$set': {'version': 0}})
>>
>> 4) $ pulp-manage-db
>>
>> That should set you straight, and you should never have to do that
>> again for the pulp_rpm project.
>>
>> We need to do this because the DB management script doesn't apply
>> migrations to new installs, but instead does a "fast-forward" to the
>> latest available version. From that point onward, any new migrations
>> would be applied by the script. Because the pulp_rpm project didn't
>> have migrations before and now does, it appears to be a "new
>> install" to the management script, so it will auto fast-forward your
>> DB.
>>
>> To mitigate this problem, I suggest we go ahead at set up a
>> migration entry point for the pulp_puppet project with no migrations
>> in it. If we do this and everyone runs pulp-manage-db while it's in
>> that state, the version 0 will be stored in everyone's DB and we
>> won't have to do this same process for that project. Sound good?
>>
>> --
>> Randy Barlow
>>
>> _______________________________________________
>> Pulp-list mailing list
>> Pulp-list at redhat.com
>> https://www.redhat.com/mailman/listinfo/pulp-list
>


-- 
Jay Dobies
Freenode: jdob @ #pulp
http://pulpproject.org | http://blog.pulpproject.org