4827b56df0
Although __table_args__ is set correctly in the base model, existing migration scripts were not generated with the mysql_engine option in the alembic output, likely due to: https://bitbucket.org/zzzeek/alembic/issue/110/ This adds the mysql_engine option to each table creation operation. Change-Id: I990e8d64bcadf2be4e1e319319bc23225123b304 Closes-Bug: #1288358
126 lines
3.5 KiB
Python
126 lines
3.5 KiB
Python
# Copyright 2012 New Dream Network, LLC (DreamHost)
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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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#
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# @author: Mark McClain, DreamHost
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from logging import config as logging_config
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from alembic import context
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import sqlalchemy as sa
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from sqlalchemy import create_engine, event, pool
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from neutron.db import model_base
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from neutron.openstack.common import importutils
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MYSQL_ENGINE = None
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DATABASE_QUOTA_DRIVER = 'neutron.extensions._quotav2_driver.DbQuotaDriver'
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# this is the Alembic Config object, which provides
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# access to the values within the .ini file in use.
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config = context.config
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neutron_config = config.neutron_config
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# Interpret the config file for Python logging.
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# This line sets up loggers basically.
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logging_config.fileConfig(config.config_file_name)
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plugin_class_path = neutron_config.core_plugin
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active_plugins = [plugin_class_path]
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active_plugins += neutron_config.service_plugins
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for class_path in active_plugins:
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importutils.import_class(class_path)
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# set the target for 'autogenerate' support
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target_metadata = model_base.BASEV2.metadata
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def set_mysql_engine(mysql_engine):
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global MYSQL_ENGINE
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MYSQL_ENGINE = (mysql_engine or
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model_base.BASEV2.__table_args__['mysql_engine'])
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def run_migrations_offline():
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"""Run migrations in 'offline' mode.
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This configures the context with either a URL
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or an Engine.
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Calls to context.execute() here emit the given string to the
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script output.
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"""
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set_mysql_engine(neutron_config.command.mysql_engine)
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kwargs = dict()
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if neutron_config.database.connection:
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kwargs['url'] = neutron_config.database.connection
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else:
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kwargs['dialect_name'] = neutron_config.database.engine
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context.configure(**kwargs)
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with context.begin_transaction():
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context.run_migrations(active_plugins=active_plugins,
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options=build_options())
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@event.listens_for(sa.Table, 'after_parent_attach')
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def set_storage_engine(target, parent):
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if MYSQL_ENGINE:
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target.kwargs['mysql_engine'] = MYSQL_ENGINE
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def run_migrations_online():
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"""Run migrations in 'online' mode.
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In this scenario we need to create an Engine
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and associate a connection with the context.
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"""
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set_mysql_engine(neutron_config.command.mysql_engine)
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engine = create_engine(
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neutron_config.database.connection,
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poolclass=pool.NullPool)
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connection = engine.connect()
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context.configure(
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connection=connection,
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target_metadata=target_metadata
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)
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try:
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with context.begin_transaction():
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context.run_migrations(active_plugins=active_plugins,
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options=build_options())
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finally:
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connection.close()
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def build_options():
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return {'folsom_quota_db_enabled': is_db_quota_enabled()}
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def is_db_quota_enabled():
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return neutron_config.QUOTAS.quota_driver == DATABASE_QUOTA_DRIVER
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if context.is_offline_mode():
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run_migrations_offline()
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else:
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run_migrations_online()
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