1 # Licensed under the Apache License, Version 2.0 (the "License"); you may
2 # not use this file except in compliance with the License. You may obtain
3 # a copy of the License at
5 # http://www.apache.org/licenses/LICENSE-2.0
7 # Unless required by applicable law or agreed to in writing, software
8 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
9 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
10 # License for the specific language governing permissions and limitations
15 from oslo_config import cfg
16 from oslo_log import log as logging
18 from neutron._i18n import _LE, _LI
19 from neutron.common import config
20 from neutron.common import utils as n_utils
21 from neutron.plugins.ml2.drivers.linuxbridge.agent \
22 import linuxbridge_neutron_agent
25 LOG = logging.getLogger(__name__)
28 def remove_empty_bridges():
30 interface_mappings = n_utils.parse_mappings(
31 cfg.CONF.LINUX_BRIDGE.physical_interface_mappings)
32 except ValueError as e:
33 LOG.error(_LE("Parsing physical_interface_mappings failed: %s."), e)
35 LOG.info(_LI("Interface mappings: %s."), interface_mappings)
38 bridge_mappings = n_utils.parse_mappings(
39 cfg.CONF.LINUX_BRIDGE.bridge_mappings)
40 except ValueError as e:
41 LOG.error(_LE("Parsing bridge_mappings failed: %s."), e)
43 LOG.info(_LI("Bridge mappings: %s."), bridge_mappings)
45 lb_manager = linuxbridge_neutron_agent.LinuxBridgeManager(
46 bridge_mappings, interface_mappings)
48 bridge_names = lb_manager.get_deletable_bridges()
49 for bridge_name in bridge_names:
50 if lb_manager.get_tap_devices_count(bridge_name):
54 lb_manager.delete_bridge(bridge_name)
55 LOG.info(_LI("Linux bridge %s deleted"), bridge_name)
57 LOG.exception(_LE("Linux bridge %s delete failed"), bridge_name)
58 LOG.info(_LI("Linux bridge cleanup completed successfully"))
62 """Main method for cleaning up empty linux bridges.
64 This tool deletes every empty linux bridge managed by linuxbridge agent
65 (brq.* linux bridges) except thes ones defined using bridge_mappings option
66 in section LINUX_BRIDGE (created by deployers).
68 This tool should not be called during an instance create, migrate, etc. as
69 it can delete a linux bridge about to be used by nova.
71 cfg.CONF(sys.argv[1:])
72 config.setup_logging()
73 remove_empty_bridges()