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# Copyright 2015 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
from neutron_lib import exceptions
import sqlalchemy as sa
from neutron._i18n import _
"""add_unique_ha_router_agent_port_bindings
Revision ID: 1df244e556f5
Revises: 34af2b5c5a59
Create Date: 2015-10-02 18:06:01.696742
"""
# revision identifiers, used by Alembic.
revision = '1df244e556f5'
down_revision = '659bf3d90664'
UNIQUE_NAME = 'uniq_ha_router_agent_port_bindings0port_id0l3_agent_id'
TABLE_NAME = 'ha_router_agent_port_bindings'
ha_router_agent_port_bindings = sa.Table(
'ha_router_agent_port_bindings', sa.MetaData(),
sa.Column('port_id', sa.String(36)),
sa.Column('router_id', sa.String(36)),
sa.Column('l3_agent_id', sa.String(36)))
class DuplicateL3HARouterAgentPortBinding(exceptions.Conflict):
message = _("Duplicate L3HARouterAgentPortBinding is created for "
"router(s) %(router)s. Database cannot be upgraded. Please, "
"remove all duplicates before upgrading the database.")
def upgrade():
op.create_unique_constraint(UNIQUE_NAME, TABLE_NAME,
['router_id', 'l3_agent_id'])
def check_sanity(connection):
res = get_duplicate_l3_ha_port_bindings(connection)
if res:
raise DuplicateL3HARouterAgentPortBinding(router=", ".join(res))
def get_duplicate_l3_ha_port_bindings(connection):
insp = sa.inspect(connection)
if 'ha_router_agent_port_bindings' not in insp.get_table_names():
return {}
session = sa.orm.Session(bind=connection.connect())
query = (session.query(ha_router_agent_port_bindings.c.router_id)
.group_by(ha_router_agent_port_bindings.c.router_id,
ha_router_agent_port_bindings.c.l3_agent_id)
.having(sa.func.count() > 1)).all()
return [q[0] for q in query]
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