Tap-as-a-Service is a project to introduce the functionality of port mirroring in OpenStack Neutron provisioned networks.
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# Copyright 2016 OpenStack Foundation
#
# 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 alembic import op
import sqlalchemy as sa
from sqlalchemy.engine import reflection
from neutron.db import migration
"""rename tenant to project
Revision ID: 4086b3cffc01
Revises: 2ecce0368a62
Create Date: 2016-07-30 22:09:16.372917
"""
# revision identifiers, used by Alembic.
revision = '4086b3cffc01'
down_revision = '2ecce0368a62'
_INSPECTOR = None
# milestone identifier, used by neutron-db-manage
neutron_milestone = [migration.NEWTON, migration.OCATA]
def get_inspector():
"""Reuse inspector."""
global _INSPECTOR
if _INSPECTOR:
return _INSPECTOR
else:
bind = op.get_bind()
_INSPECTOR = reflection.Inspector.from_engine(bind)
return _INSPECTOR
def get_tables():
"""Returns hardcoded list of tables which have ``tenant_id`` column.
The list is hard-coded to match the state of the schema when this upgrade
script is run.
"""
tables = [
'tap_services',
'tap_flows',
]
return tables
def get_columns(table):
"""Returns list of columns for given table."""
inspector = get_inspector()
return inspector.get_columns(table)
def get_data():
"""Returns combined list of tuples: [(table, column)].
The list is built from tables with a tenant_id column.
"""
output = []
tables = get_tables()
for table in tables:
columns = get_columns(table)
for column in columns:
if column['name'] == 'tenant_id':
output.append((table, column))
return output
def alter_column(table, column):
old_name = 'tenant_id'
new_name = 'project_id'
op.alter_column(
table_name=table,
column_name=old_name,
new_column_name=new_name,
existing_type=column['type'],
existing_nullable=column['nullable']
)
def upgrade():
data = get_data()
for table, column in data:
alter_column(table, column)
def contract_creation_exceptions():
"""Special migration for the blueprint to support Keystone V3.
We drop all tenant_id columns and create project_id columns instead.
"""
return {
sa.Column: ['.'.join([table, 'project_id']) for table in get_tables()],
sa.Index: get_tables()
}