OpenStack Networking (Neutron)
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# 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
# 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.
import sys
from neutron_lib.utils import helpers
from oslo_config import cfg
from oslo_log import log as logging
from neutron.conf.agent import common as config
from neutron.plugins.ml2.drivers.linuxbridge.agent \
import linuxbridge_neutron_agent
LOG = logging.getLogger(__name__)
def remove_empty_bridges():
interface_mappings = helpers.parse_mappings(
except ValueError as e:
LOG.error("Parsing physical_interface_mappings failed: %s.", e)
sys.exit(1)"Interface mappings: %s.", interface_mappings)
bridge_mappings = helpers.parse_mappings(
except ValueError as e:
LOG.error("Parsing bridge_mappings failed: %s.", e)
sys.exit(1)"Bridge mappings: %s.", bridge_mappings)
lb_manager = linuxbridge_neutron_agent.LinuxBridgeManager(
bridge_mappings, interface_mappings)
bridge_names = lb_manager.get_deletable_bridges()
for bridge_name in bridge_names:
if lb_manager.get_tap_devices_count(bridge_name):
lb_manager.delete_bridge(bridge_name)"Linux bridge %s deleted", bridge_name)
except RuntimeError:
LOG.exception("Linux bridge %s delete failed", bridge_name)"Linux bridge cleanup completed successfully")
def main():
"""Main method for cleaning up empty linux bridges.
This tool deletes every empty linux bridge managed by linuxbridge agent
(brq.* linux bridges) except thes ones defined using bridge_mappings option
in section LINUX_BRIDGE (created by deployers).
This tool should not be called during an instance create, migrate, etc. as
it can delete a linux bridge about to be used by nova.