neutron-db-manage does not work properly when using Metaplugin

[Itsuro Oda]

neutron-db-manage does not create Neutron DB nor upgrade Neutron DB properly when using Metaplugin.

The first cause of this problem is that 'active_plugins' parameter passed to migration scripts includes only metaplugin (i.e. not include target plugins under metaplugin).

There some problems even if the first cause is fixed.
For example there are multiple scripts which handles an same table (off course the target plugin for each script is different, but they may be used at the same time under metaplugin).

[Henry Gessau (gessau)]

I have started some work on addressing migration issues for plugins that depend on other plugins, but I don't think I am covering all the variations of metaplugin. See https://review.openstack.org/84519

[Itsuro Oda (oda-g)]

Henry,

Thanks for your comment.
As discussed with you on IRC I will deal with metaplugin migration (based on this bug report).

[Henry Gessau (gessau)]

In patch set 7 of https://review.openstack.org/84519 I have added a table of plugins with dependencies. This might allow you to add the metaplugin dependencies dynamically, something like this:

from neutron.db import migration

    ...

    meta_dependencies = determine_meta_contained_plugins()
    migration.PLUGIN_DEPENDENCIES['meta'] = meta_dependencies

    if migration.should_run(active_plugins, ...

[Mark McClain (markmcclain)]

The metaplugin is untested and will be released in Icehouse as untested and pending removal in Juno. Long term I think we should look at migration strategies away from the metaplugin as ML2 solves the problem better without special database tricks.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/85660

[Hirofumi Ichihara (ichihara-hirofumi)]

Hi, Mark

Metaplugin is tested by Metaplugin CI Test.
We stopped MetapluginCI for the last two weeks because we need to deal with this bug and the other bug( https://bugs.launchpad.net/neutron/+bug/1300570 ).
But now MetapluginCI is running.

Metaplugin will also be required after Juno because there are many plugins that cannot use ML2 (For example Vmware NSX).

[OpenStack Infra (hudson-openstack)]

Change abandoned by Itsuro Oda (<email address hidden>) on branch: master
Review: https://review.openstack.org/85660
Reason: DB migration refactoring is under development.
https://review.openstack.org/95738/

If it is done, this patch is not necessary since all tables exist.

[Ann Taraday (akamyshnikova)]

I think this should be fixed with heal script and other db refactor changes.

[Itsuro Oda (oda-g)]

> I think this should be fixed with heal script and other db refactor changes.

Yes. I want to close (abandon) this bug report but I don't find how to close.