121 lines
3.6 KiB
Python
121 lines
3.6 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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from alembic import context
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from neutron_lib.db import model_base
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from oslo_config import cfg
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import sqlalchemy as sa
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from sqlalchemy import event
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from neutron.db.migration.alembic_migrations import external
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from neutron.db.migration import autogen
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from neutron.db.migration.connection import DBConnection
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from neutron.db.migration.models import head # noqa
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try:
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# NOTE(mriedem): This is to register the DB2 alembic code which
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# is an optional runtime dependency.
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from ibm_db_alembic.ibm_db import IbmDbImpl # noqa # pylint: disable=unused-import
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except ImportError:
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pass
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MYSQL_ENGINE = None
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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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# set the target for 'autogenerate' support
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target_metadata = model_base.BASEV2.metadata
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def set_mysql_engine():
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try:
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mysql_engine = neutron_config.command.mysql_engine
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except cfg.NoSuchOptError:
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mysql_engine = None
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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 include_object(object_, name, type_, reflected, compare_to):
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if type_ == 'table' and name in external.TABLES:
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return False
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elif type_ == 'index' and reflected and name.startswith("idx_autoinc_"):
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# skip indexes created by SQLAlchemy autoincrement=True
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# on composite PK integer columns
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return False
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else:
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return True
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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()
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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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kwargs['include_object'] = include_object
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context.configure(**kwargs)
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with context.begin_transaction():
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context.run_migrations()
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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()
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connection = config.attributes.get('connection')
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with DBConnection(neutron_config.database.connection, connection) as conn:
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context.configure(
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connection=conn,
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target_metadata=target_metadata,
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include_object=include_object,
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process_revision_directives=autogen.process_revision_directives
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)
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with context.begin_transaction():
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context.run_migrations()
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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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