Migration Plugin

Motivation¶

Currently, Publications/Distributions are recreated on every run. It means that on every run, even if there were no changes all the metadata (for some plugins) needs to be regenerated and Publication and Distribution needs to be created.

Proposal¶

Track If there were any changes in pulp2 distributors. Check if there were any changes to repositories. Based on that information decide whether to recreate the Publications and Distributions or not

Track If there were any changes in pulp2 distributors¶

Similar to importers, this commit removed some initial attempts to track the distrubutors, see the deletion in mark_removed_resources and pre_migrate_*.

It's very important to delete all irrelevant Distributions, otherwise it's possible to have an overlapping base_paths which will fail migration.

• Pulp2Distributor model for pre-migration needs a new field not_in_plan
• Update not_in_plan accordingly in the mark_removed_resources step
• Remove Publications and Distributions from Pulp 3 if their Pulp 2 counterpart is marked as not_in_plan
• When pre-migrating a distributor, determine if there were any changes and mark it by setting is_migrated to False
• When pre-migrating a distributor, if there are changes affected a publication or a distribution, remove a Publication or A Distribution associated with it.

Check if there were any changes to repositories¶

• If a repository had any changes to the content, distributors for such repository needs to be marked as is_migrated=False and corresponding Publication/Distribution should be removed from Pulp 3.

Based on that information decide whether to recreate Publications and Distributions or not¶

• At the migration step, create a Publication and/or a Distribution for each Pulp2Distributor has is_migrated=False