93 lines
3.3 KiB
Python
93 lines
3.3 KiB
Python
# Copyright 2020 Red Hat, Inc.
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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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import sys
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from neutron_lib.plugins.ml2 import ovs_constants
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from neutron_lib.plugins import utils as p_utils
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from neutron_lib.utils import helpers
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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.common import config as common_config
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from neutron.conf.agent import common as agent_config
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from neutron.conf.plugins.ml2.drivers import ovs_conf
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LOG = logging.getLogger(__name__)
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def get_patch_port_names(bridge_name):
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int_if_name = p_utils.get_interface_name(
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bridge_name, prefix=ovs_constants.PEER_INTEGRATION_PREFIX)
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phys_if_name = p_utils.get_interface_name(
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bridge_name, prefix=ovs_constants.PEER_PHYSICAL_PREFIX)
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return int_if_name, phys_if_name
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class PatchPortCleaner(object):
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def __init__(self, config):
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LOG.debug("Get OVS bridge mappings")
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mappings = helpers.parse_mappings(config.OVS.bridge_mappings)
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self.bridges = [ovs_lib.OVSBridge(bridge)
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for bridge in mappings.values()]
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self.int_br = ovs_lib.OVSBridge(config.OVS.integration_bridge)
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def destroy_patch_ports(self):
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if (not self.int_br.bridge_exists(self.int_br.br_name) or
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self.flows_configured()):
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# integration bridge hasn't been created by agent yet or it's been
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# already configured by the agent
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return
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for bridge in self.bridges:
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try:
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LOG.debug("Remove patch port from bridge %s", bridge.br_name)
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self._remove_patch_ports_from_int_br(bridge)
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except Exception as e:
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LOG.error("Failed to remove patch port from bridge %s: %s",
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bridge.br_name, e)
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def _remove_patch_ports_from_int_br(self, bridge):
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int_if_name, phys_if_name = get_patch_port_names(
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bridge.br_name)
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int_type = self.int_br.db_get_val(
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"Interface", int_if_name, "type", log_errors=False)
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if int_type == 'patch':
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self.int_br.delete_port(int_if_name)
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bridge.delete_port(phys_if_name)
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def flows_configured(self):
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"""Return True if the integration bridge has flows already configured.
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"""
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LOG.debug("Get configured flows for integration bridge %s",
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self.int_br.br_name)
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return bool(
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self.int_br.dump_flows_for(table=ovs_constants.CANARY_TABLE))
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def main():
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common_config.register_common_config_options()
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common_config.init(sys.argv[1:])
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ovs_conf.register_ovs_agent_opts()
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common_config.setup_logging()
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agent_config.setup_privsep()
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port_cleaner = PatchPortCleaner(cfg.CONF)
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port_cleaner.destroy_patch_ports()
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if __name__ == "__main__":
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main()
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