84 lines
3.3 KiB
Python
84 lines
3.3 KiB
Python
# Copyright 2012 OpenStack LLC.
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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 sqlalchemy import String, Column, MetaData, Table, select
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from nova.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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""" Remove availability_zone column from services model and replace with
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aggregate based zone."""
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def upgrade(migrate_engine):
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meta = MetaData()
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meta.bind = migrate_engine
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services = Table('services', meta, autoload=True)
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aggregates = Table('aggregates', meta, autoload=True)
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aggregate_metadata = Table('aggregate_metadata', meta, autoload=True)
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# migrate data
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record_list = list(services.select().execute())
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for rec in record_list:
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# Only need to migrate nova-compute availability_zones
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if rec['binary'] != 'nova-compute':
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continue
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# if zone doesn't exist create
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result = aggregate_metadata.select().where(aggregate_metadata.c.key ==
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'availability_zone' and
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aggregate_metadata.c.key == rec['availability_zone']).execute()
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result = [r for r in result]
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if len(result) > 0:
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agg_id = result[0].aggregate_id
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else:
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agg = aggregates.insert()
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result = agg.execute({'name': rec['availability_zone']})
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agg_id = result.inserted_primary_key[0]
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row = aggregate_metadata.insert()
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row.execute({'created_at': rec['created_at'],
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'updated_at': rec['updated_at'],
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'deleted_at': rec['deleted_at'],
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'deleted': rec['deleted'],
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'key': 'availability_zone',
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'value': rec['availability_zone'],
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'aggregate_id': agg_id,
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})
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# add host to zone
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agg_hosts = Table('aggregate_hosts', meta, autoload=True)
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row = agg_hosts.insert()
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row.execute({'host': rec['host'], 'aggregate_id': agg_id})
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services.drop_column('availability_zone')
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def downgrade(migrate_engine):
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meta = MetaData()
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meta.bind = migrate_engine
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services = Table('services', meta, autoload=True)
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aggregate_metadata = Table('aggregate_metadata', meta, autoload=True)
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agg_hosts = Table('aggregate_hosts', meta, autoload=True)
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availability_zone = Column('availability_zone', String(255),
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default='nova')
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services.create_column(availability_zone)
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# migrate data
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services.update().values(availability_zone=select(
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[aggregate_metadata.c.value]).
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where(agg_hosts.c.aggregate_id == aggregate_metadata.c.aggregate_id).
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where(aggregate_metadata.c.key == 'availability_zone').
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where(agg_hosts.c.host == services.c.host).
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where(services.c.binary == 'nova-compute')).execute()
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