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