DB update fails during magnum install in newton

[Pauline Castets]

I am following this guide: http://docs.openstack.org/project-install-guide/container-infrastructure-management/newton/install-ubuntu.html to install Magnum (Newton) in Ubuntu 16.04.

I have the following error when populating the magnum database:

root@openstack-rennes-3:/home/stack# su -s /bin/sh -c "magnum-db-manage upgrade" magnum
Traceback (most recent call last):
  File "/usr/bin/magnum-db-manage", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/dist-packages/magnum/cmd/db_manage.py", line 69, in main
    CONF.command.func()
  File "/usr/lib/python2.7/dist-packages/magnum/cmd/db_manage.py", line 29, in do_upgrade
    migration.upgrade(CONF.command.revision)
  File "/usr/lib/python2.7/dist-packages/magnum/db/migration.py", line 36, in upgrade
    return get_backend().upgrade(version)
  File "/usr/lib/python2.7/dist-packages/magnum/db/sqlalchemy/migration.py", line 57, in upgrade
    get_manager().upgrade(version)
  File "/usr/lib/python2.7/dist-packages/magnum/db/sqlalchemy/migration.py", line 35, in get_manager
    _MANAGER = manager.MigrationManager(migration_config)
  File "/usr/lib/python2.7/dist-packages/oslo_db/sqlalchemy/migration_cli/manager.py", line 47, in __init__
    raise ValueError('There must be at least one plugin active.')
ValueError: There must be at least one plugin active.

I suspect that I made a configuration error, but I don't know what to look for.

I would like to mention that the magnum.conf modifications that are in the installation manual look quite different from the installed magnum.conf file, especially the [keystone_authtoken] options.

[yatin (yatinkarel)]

Can you check the version installed of magnum.
I think it's related with https://bugs.launchpad.net/ubuntu/+source/magnum/+bug/1632743 and is fixed

[Adrien Cunin (adri2000)]

It is indeed a bug in the package rather than in Magnum itself, and it's fixed in Debian. Not yet in the Ubuntu package.
Marking as duplicate.