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# Copyright 2012 Managed I.T.
#
# Author: Kiall Mac Innes <kiall@managedit.ie>
#
# 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 oslo_log import log as logging
from sqlalchemy import MetaData, Table, Column, Boolean
LOG = logging.getLogger(__name__)
meta = MetaData()
def upgrade(migrate_engine):
meta.bind = migrate_engine
records_table = Table('records', meta, autoload=True)
# Create the new inherit_ttl column
inherit_ttl = Column('inherit_ttl', Boolean(), default=True)
inherit_ttl.create(records_table)
# Semi-Populate the new inherit_ttl column. We'll need to do a cross-db
# join from powerdns.records -> powerdns.domains -> designate.domains, so
# we can't perform the second half here.
query = records_table.update().values(inherit_ttl=False)
query = query.where(records_table.c.ttl is not None)
query.execute()
# If there are records without an explicity configured TTL, we'll need
# a manual post-migration step.
query = records_table.select()
query = query.where(records_table.c.ttl is None)
c = query.count()
if c > 0:
pmq = ('UPDATE powerdns.records JOIN powerdns.domains ON powerdns.reco'
'rds.domain_id = powerdns.domains.id JOIN designate.domains ON '
'powerdns.domains.designate_id = designate.domains.id SET power'
'dns.records.ttl = designate.domains.ttl WHERE powerdns.records'
'.inherit_ttl = 1;')
LOG.warning('**** A manual post-migration step is required ****')
LOG.warning('Please issue this query: %s', pmq)
def downgrade(migrate_engine):
meta.bind = migrate_engine
records_table = Table('records', meta, autoload=True)
records_table.c.inherit_ttl.drop()
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