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# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Database setup and migration commands."""
from oslo.config import cfg
from stevedore import driver
_IMPL = None
def get_backend():
global _IMPL
if not _IMPL:
cfg.CONF.import_opt('backend', 'oslo.db.options', group='database')
_IMPL = driver.DriverManager("magnum.database.migration_backend",
return _IMPL
def upgrade(version=None):
"""Migrate the database to `version` or the most recent version."""
return get_backend().upgrade(version)
def downgrade(version=None):
return get_backend().downgrade(version)
def version():
return get_backend().version()
def stamp(version):
return get_backend().stamp(version)
def revision(message, autogenerate):
return get_backend().revision(message, autogenerate)
def create_schema():
return get_backend().create_schema()