145 lines
5.3 KiB
Python
145 lines
5.3 KiB
Python
# Copyright 2016 Hewlett Packard Enterprise Development LP
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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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# 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 neutron_lib.api.definitions import portbindings
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from neutron_lib.callbacks import events
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from neutron_lib.callbacks import registry
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from neutron_lib.callbacks import resources
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from neutron_lib import constants
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from neutron_lib.plugins import directory
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from neutron_lib.plugins.ml2 import ovs_constants as agent_consts
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from neutron_lib.services.trunk import constants as trunk_consts
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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.objects import trunk as trunk_obj
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from neutron.services.trunk.drivers import base
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from neutron.services.trunk.drivers.openvswitch import utils
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from neutron.services.trunk import exceptions as trunk_exc
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LOG = logging.getLogger(__name__)
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NAME = 'openvswitch'
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SUPPORTED_INTERFACES = (
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portbindings.VIF_TYPE_OVS,
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portbindings.VIF_TYPE_VHOST_USER,
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)
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SUPPORTED_SEGMENTATION_TYPES = (
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trunk_consts.SEGMENTATION_TYPE_VLAN,
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)
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DRIVER = None
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class OVSDriver(base.DriverBase):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self._core_plugin = None
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@property
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def core_plugin(self):
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if not self._core_plugin:
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self._core_plugin = directory.get_plugin()
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return self._core_plugin
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@property
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def is_loaded(self):
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try:
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return NAME in cfg.CONF.ml2.mechanism_drivers
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except cfg.NoSuchOptError:
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return False
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@classmethod
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def create(cls):
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return OVSDriver(NAME,
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SUPPORTED_INTERFACES,
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SUPPORTED_SEGMENTATION_TYPES,
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constants.AGENT_TYPE_OVS)
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@staticmethod
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def _get_trunk(context, trunk_id):
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"""Return the trunk object or raise if not found."""
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obj = trunk_obj.Trunk.get_object(context, id=trunk_id)
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if obj is None:
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raise trunk_exc.TrunkNotFound(trunk_id=trunk_id)
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return obj
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def _update_subport_binding(self, context, trunk_id):
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"""Update the subport binding host"""
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trunk_obj = self._get_trunk(context, trunk_id)
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trunk_port = self.core_plugin.get_port(context, trunk_obj.port_id)
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trunk_host = trunk_port.get(portbindings.HOST_ID)
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for subport in trunk_obj.sub_ports:
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port = self.core_plugin.update_port(
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context, subport.port_id,
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{'port': {portbindings.HOST_ID: trunk_host,
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'device_owner': trunk_consts.TRUNK_SUBPORT_OWNER}})
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vif_type = port.get(portbindings.VIF_TYPE)
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if vif_type == portbindings.VIF_TYPE_BINDING_FAILED:
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raise trunk_exc.SubPortBindingError(
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port_id=subport.port_id, trunk_id=trunk_obj.id)
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@registry.receives(resources.PORT, [events.AFTER_UPDATE])
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def _subport_binding(self, resource, event, trigger, payload=None):
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"""Bind the subports to the parent port host
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This method listen to the port after update events. If the parent port
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is updated and transitions from inactive to active, this method
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retrieves the port host ID and binds the subports to this host.
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:param resource: neutron_lib.callbacks.resources.PORT
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:param event: neutron_lib.callbacks.events.AFTER_UPDATE
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:param trigger: the specific driver plugin
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"""
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updated_port = payload.latest_state
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trunk_details = updated_port.get('trunk_details')
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vif_details = updated_port.get(portbindings.VIF_DETAILS)
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driver = vif_details.get(portbindings.VIF_DETAILS_BOUND_DRIVERS,
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{}).get('0')
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# If no trunk_details, the port is not the parent of a trunk.
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# If this port is not bound to ML2/OVS, we skip this method.
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if not trunk_details or not driver == NAME:
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return
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context = payload.context
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orig_status = payload.states[0].get('status')
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new_status = updated_port.get('status')
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trunk_id = trunk_details['trunk_id']
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if (new_status == constants.PORT_STATUS_ACTIVE and
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new_status != orig_status):
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self._update_subport_binding(context, trunk_id)
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def register():
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"""Register the driver."""
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global DRIVER
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DRIVER = OVSDriver.create()
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# To set the bridge_name in a parent port's vif_details.
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registry.subscribe(vif_details_bridge_name_handler,
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agent_consts.OVS_BRIDGE_NAME,
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events.BEFORE_READ)
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LOG.debug('Open vSwitch trunk driver registered')
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def vif_details_bridge_name_handler(resource, event, set_br_name,
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payload=None):
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"""If port is a trunk port, generate a bridge_name for its vif_details."""
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port = payload.metadata['port']
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if 'trunk_details' in port:
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set_br_name(utils.gen_trunk_br_name(port['trunk_details']['trunk_id']))
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