99 lines
3.6 KiB
Python
99 lines
3.6 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# 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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# 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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import os
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import sys
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from nova import exception
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from nova import flags
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import sqlalchemy
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from migrate.versioning import api as versioning_api
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try:
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from migrate.versioning import exceptions as versioning_exceptions
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except ImportError:
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try:
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# python-migration changed location of exceptions after 1.6.3
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# See LP Bug #717467
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from migrate import exceptions as versioning_exceptions
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except ImportError:
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sys.exit(_("python-migrate is not installed. Exiting."))
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FLAGS = flags.FLAGS
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def db_sync(version=None):
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if version is not None:
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try:
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version = int(version)
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except ValueError:
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raise exception.Error(_("version should be an integer"))
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current_version = db_version()
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repo_path = _find_migrate_repo()
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if version is None or version > current_version:
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return versioning_api.upgrade(FLAGS.sql_connection, repo_path, version)
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else:
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return versioning_api.downgrade(FLAGS.sql_connection, repo_path,
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version)
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def db_version():
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repo_path = _find_migrate_repo()
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try:
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return versioning_api.db_version(FLAGS.sql_connection, repo_path)
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except versioning_exceptions.DatabaseNotControlledError:
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# If we aren't version controlled we may already have the database
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# in the state from before we started version control, check for that
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# and set up version_control appropriately
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meta = sqlalchemy.MetaData()
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engine = sqlalchemy.create_engine(FLAGS.sql_connection, echo=False)
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meta.reflect(bind=engine)
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try:
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for table in ('auth_tokens', 'zones', 'export_devices',
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'fixed_ips', 'floating_ips', 'instances',
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'key_pairs', 'networks', 'projects', 'quotas',
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'security_group_instance_association',
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'security_group_rules', 'security_groups',
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'services', 'migrations',
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'users', 'user_project_association',
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'user_project_role_association',
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'user_role_association',
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'virtual_storage_arrays',
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'volumes', 'volume_metadata',
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'volume_types', 'volume_type_extra_specs'):
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assert table in meta.tables
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return db_version_control(1)
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except AssertionError:
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return db_version_control(0)
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def db_version_control(version=None):
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repo_path = _find_migrate_repo()
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versioning_api.version_control(FLAGS.sql_connection, repo_path, version)
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return version
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def _find_migrate_repo():
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"""Get the path for the migrate repository."""
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path = os.path.join(os.path.abspath(os.path.dirname(__file__)),
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'migrate_repo')
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assert os.path.exists(path)
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return path
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