/usr/lib/python2.7/dist-packages/neutron_dynamic_routing/db/migration/alembic_migrations/env.py is in python-neutron-dynamic-routing 2:12.0.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# 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.
from logging import config as logging_config
from alembic import context
from neutron_lib.db import model_base
from oslo_config import cfg
from oslo_db.sqlalchemy import session
import sqlalchemy as sa
from sqlalchemy import event
from neutron_dynamic_routing.db.migration.models import head # noqa
MYSQL_ENGINE = None
DR_VERSION_TABLE = 'alembic_version_dr'
config = context.config
neutron_config = config.neutron_config
logging_config.fileConfig(config.config_file_name)
target_metadata = model_base.BASEV2.metadata
def set_mysql_engine():
try:
mysql_engine = neutron_config.command.mysql_engine
except cfg.NoSuchOptError:
mysql_engine = None
global MYSQL_ENGINE
MYSQL_ENGINE = (mysql_engine or
model_base.BASEV2.__table_args__['mysql_engine'])
def run_migrations_offline():
set_mysql_engine()
kwargs = dict()
if neutron_config.database.connection:
kwargs['url'] = neutron_config.database.connection
else:
kwargs['dialect_name'] = neutron_config.database.engine
kwargs['version_table'] = DR_VERSION_TABLE
context.configure(**kwargs)
with context.begin_transaction():
context.run_migrations()
@event.listens_for(sa.Table, 'after_parent_attach')
def set_storage_engine(target, parent):
if MYSQL_ENGINE:
target.kwargs['mysql_engine'] = MYSQL_ENGINE
def run_migrations_online():
set_mysql_engine()
engine = session.create_engine(neutron_config.database.connection)
connection = engine.connect()
context.configure(
connection=connection,
target_metadata=target_metadata,
version_table=DR_VERSION_TABLE
)
try:
with context.begin_transaction():
context.run_migrations()
finally:
connection.close()
engine.dispose()
if context.is_offline_mode():
run_migrations_offline()
else:
run_migrations_online()
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