60 lines
1.6 KiB
Python
60 lines
1.6 KiB
Python
# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Copyright 2013 OpenStack Foundation
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# Copyright 2013 IBM Corp.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Database setup and migration commands."""
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import os
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import threading
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from oslo_config import cfg
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from oslo_db import options as db_options
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from stevedore import driver
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_IMPL = None
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_LOCK = threading.Lock()
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db_options.set_defaults(cfg.CONF)
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def get_backend():
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global _IMPL
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if _IMPL is None:
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with _LOCK:
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if _IMPL is None:
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_IMPL = driver.DriverManager(
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"glance.database.migration_backend",
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cfg.CONF.database.backend).driver
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return _IMPL
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# Migration-related constants
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EXPAND_BRANCH = 'expand'
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CONTRACT_BRANCH = 'contract'
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CURRENT_RELEASE = 'victoria'
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ALEMBIC_INIT_VERSION = 'liberty'
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LATEST_REVISION = 'ussuri_contract01'
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INIT_VERSION = 0
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MIGRATE_REPO_PATH = os.path.join(
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os.path.abspath(os.path.dirname(__file__)),
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'sqlalchemy',
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'migrate_repo',
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)
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