127 lines
4.2 KiB
Python
127 lines
4.2 KiB
Python
# Copyright (c) 2012 OpenStack Foundation.
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# All Rights Reserved.
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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 oslo_config import cfg
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from oslo_log import log as logging
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from neutron.agent.common import ovs_lib
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from neutron.agent.linux import interface
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from neutron.agent.linux import ip_lib
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from neutron.common import config
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from neutron.conf.agent import cmd
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from neutron.conf.agent import common as agent_config
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from neutron.conf.agent.l3 import config as l3_config
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from neutron.plugins.ml2.drivers.openvswitch.agent.common import constants
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LOG = logging.getLogger(__name__)
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def setup_conf():
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"""Setup the cfg for the clean up utility.
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Use separate setup_conf for the utility because there are many options
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from the main config that do not apply during clean-up.
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"""
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conf = cfg.CONF
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cmd.register_cmd_opts(cmd.ovs_opts, conf)
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l3_config.register_l3_agent_config_opts(l3_config.OPTS, conf)
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conf.register_opts(interface.OPTS)
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agent_config.register_interface_driver_opts_helper(conf)
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return conf
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def get_bridge_deletable_ports(br):
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"""
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Return a list of OVS Bridge ports, excluding the ports who should not be
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cleaned. such ports are tagged with the 'skip_cleanup' key in external_ids.
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"""
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return [port.port_name for port in br.get_vif_ports()
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if constants.SKIP_CLEANUP not in
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br.get_port_external_ids(port.port_name)]
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def collect_neutron_ports(bridges):
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"""Collect ports created by Neutron from OVS."""
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ports = []
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for bridge in bridges:
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ovs = ovs_lib.OVSBridge(bridge)
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ports += get_bridge_deletable_ports(ovs)
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return ports
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def delete_neutron_ports(ports):
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"""Delete non-internal ports created by Neutron
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Non-internal OVS ports need to be removed manually.
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"""
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for port in ports:
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device = ip_lib.IPDevice(port)
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if device.exists():
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device.link.delete()
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LOG.info("Deleting port: %s", port)
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def main():
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"""Main method for cleaning up OVS bridges.
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The utility cleans up the integration bridges used by Neutron.
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"""
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conf = setup_conf()
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conf()
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config.setup_logging()
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do_main(conf)
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def do_main(conf):
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configuration_bridges = set([conf.ovs_integration_bridge,
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conf.external_network_bridge])
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ovs = ovs_lib.BaseOVS()
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ovs_bridges = set(ovs.get_bridges())
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available_configuration_bridges = configuration_bridges & ovs_bridges
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if conf.ovs_all_ports:
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bridges = ovs_bridges
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else:
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bridges = available_configuration_bridges
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try:
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# The ovs_cleanup method not added to the deprecated vsctl backend
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for bridge in bridges:
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LOG.info("Cleaning bridge: %s", bridge)
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ovs.ovsdb.ovs_cleanup(bridge,
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conf.ovs_all_ports).execute(check_error=True)
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except AttributeError:
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# Collect existing ports created by Neutron on configuration bridges.
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# After deleting ports from OVS bridges, we cannot determine which
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# ports were created by Neutron, so port information is collected now.
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ports = collect_neutron_ports(available_configuration_bridges)
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for bridge in bridges:
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LOG.info("Cleaning bridge: %s", bridge)
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ovs = ovs_lib.OVSBridge(bridge)
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if conf.ovs_all_ports:
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port_names = ovs.get_port_name_list()
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else:
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port_names = get_bridge_deletable_ports(ovs)
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for port_name in port_names:
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ovs.delete_port(port_name)
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# Remove remaining ports created by Neutron (usually veth pair)
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delete_neutron_ports(ports)
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LOG.info("OVS cleanup completed successfully")
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