neutron-db-manage current/history/branches/stamp/revision is broken

[Ronak Shah]

In order to fix bug (https://bugs.launchpad.net/neutron/+bug/1288358) following commit was made https://review.openstack.org/#/c/81334.

That has introduce a problem where neutron-db-manage does not work with some of the options.
For example:
root@openstack-ubuntu:/opt/stack/neutron# neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file <X> --config-file <Y> current
Traceback (most recent call last):
  File "/usr/local/bin/neutron-db-manage", line 10, in <module>
    sys.exit(main())
  File "/opt/stack/neutron/neutron/db/migration/cli.py", line 175, in main
    CONF.command.func(config, CONF.command.name)
  File "/opt/stack/neutron/neutron/db/migration/cli.py", line 63, in do_alembic_command
    getattr(alembic_command, cmd)(config, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/alembic/command.py", line 233, in current
    script.run_env()
  File "/usr/local/lib/python2.7/dist-packages/alembic/script.py", line 203, in run_env
    util.load_python_file(self.dir, 'env.py')
  File "/usr/local/lib/python2.7/dist-packages/alembic/util.py", line 212, in load_python_file
    module = load_module_py(module_id, path)
  File "/usr/local/lib/python2.7/dist-packages/alembic/compat.py", line 58, in load_module_py
    mod = imp.load_source(module_id, path, fp)
  File "/opt/stack/neutron/neutron/db/migration/alembic_migrations/env.py", line 125, in <module>
    run_migrations_online()
  File "/opt/stack/neutron/neutron/db/migration/alembic_migrations/env.py", line 94, in run_migrations_online
    set_mysql_engine(neutron_config.command.mysql_engine)
  File "/usr/local/lib/python2.7/dist-packages/oslo/config/cfg.py", line 2344, in __getattr__
    raise NoSuchOptError(name)
oslo.config.cfg.NoSuchOptError: no such option: mysql_engine

root@openstack-ubuntu:/opt/stack/neutron# neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file <X> --config-file <Y> stamp icehouse
Traceback (most recent call last):
  File "/usr/local/bin/neutron-db-manage", line 10, in <module>
    sys.exit(main())
  File "/opt/stack/neutron/neutron/db/migration/cli.py", line 175, in main
    CONF.command.func(config, CONF.command.name)
  File "/opt/stack/neutron/neutron/db/migration/cli.py", line 91, in do_stamp
    sql=CONF.command.sql)
  File "/opt/stack/neutron/neutron/db/migration/cli.py", line 63, in do_alembic_command
    getattr(alembic_command, cmd)(config, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/alembic/command.py", line 258, in stamp
    script.run_env()
  File "/usr/local/lib/python2.7/dist-packages/alembic/script.py", line 203, in run_env
    util.load_python_file(self.dir, 'env.py')
  File "/usr/local/lib/python2.7/dist-packages/alembic/util.py", line 212, in load_python_file
    module = load_module_py(module_id, path)
  File "/usr/local/lib/python2.7/dist-packages/alembic/compat.py", line 58, in load_module_py
    mod = imp.load_source(module_id, path, fp)
  File "/opt/stack/neutron/neutron/db/migration/alembic_migrations/env.py", line 125, in <module>
    run_migrations_online()
  File "/opt/stack/neutron/neutron/db/migration/alembic_migrations/env.py", line 94, in run_migrations_online
    set_mysql_engine(neutron_config.command.mysql_engine)
  File "/usr/local/lib/python2.7/dist-packages/oslo/config/cfg.py", line 2344, in __getattr__
    raise NoSuchOptError(name)
oslo.config.cfg.NoSuchOptError: no such option: mysql_engine

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/112171

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/112171
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=01b2eedd05fb91aa8970c64b753d831257243598
Submitter: Jenkins
Branch: master

commit 01b2eedd05fb91aa8970c64b753d831257243598
Author: ronak <email address hidden>
Date: Tue Aug 5 17:40:24 2014 -0700

    Fixing neutron-db-manage with some options other than upgrade/downgrade

    "mysql-engine" argument was added to upgrade and downgrade option of
    neutron-db-manage.
    Reference commit: http://tinyurl.com/mzepbmq

    migration environment's run_migration_offline/online() gets called
    even for other neutron-db-manage options as well such as current,
    history, stamp, branches etc. For those options since the argument
    can not be set, it throws oslo.config.cfg.NoSuchOptError.
    This fix tries to catch it and set the value accordingly.

    Closes-bug: #1353180

    Change-Id: I044daf04216ec61245ddb51689f8e50be5666e34