magnum/magnum/db/migration.py
Steven Dake bb2546f0eb Copy Ironic's database model codebase
The Ironic codebase is pretty simple for database access.  This work
leads into the introduction of versioned object technology from nova
and ironic that will be entering oslo:

https://review.openstack.org/#/c/127532/

This will drastically speed up the process of implementing moving the
RPC objects across the network.

Change-Id: I38aa451b658b66f5b6f10ced03ea2e0355af4ecd
2014-12-02 15:04:31 -07:00

57 lines
1.6 KiB
Python

# 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
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# 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",
cfg.CONF.database.backend).driver
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()