vmware-nsx/neutron/plugins/ml2/drivers/mech_linuxbridge.py
Francois Eleouet 7e79e6973e Vxlan / L2population support to Linuxbridge Agent
This patch introduces VXLAN support for Linuxbridge agent alongside
with ml2 plugin support in linubridge mechnism driver.

A new vxlan configuration section is added for vxlan related parameters.

The agent also implements l2population RPC callbacks which allows ml2
plugin using l2population mechnism driver to populate vxlan forwarding
and neighbor tables following portbinding events. It allows agent to
respond locally to ARP requests for remote VMs and avoid dataplane based
learning. This should help limiting the use of multicast or flooding
for broadcast emulation in vxlan networks.

These changes should anyway have a limited risk, as agent behaviour
shouldn't be affected, except when vxlan is enabled alongside ml2 plugin.

Implements: blueprint l2-population

Change-Id: I99a961c53f9e451409f1affb079042936d8ae5c6
2013-09-12 02:51:37 +02:00

58 lines
2.2 KiB
Python

# Copyright (c) 2013 OpenStack Foundation
# All Rights Reserved.
#
# 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
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# 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.
from neutron.common import constants
from neutron.extensions import portbindings
from neutron.openstack.common import log
from neutron.plugins.ml2 import driver_api as api
from neutron.plugins.ml2.drivers import mech_agent
LOG = log.getLogger(__name__)
class LinuxbridgeMechanismDriver(mech_agent.AgentMechanismDriverBase):
"""Attach to networks using linuxbridge L2 agent.
The LinuxbridgeMechanismDriver integrates the ml2 plugin with the
linuxbridge L2 agent. Port binding with this driver requires the
linuxbridge agent to be running on the port's host, and that agent
to have connectivity to at least one segment of the port's
network.
"""
def __init__(self):
super(LinuxbridgeMechanismDriver, self).__init__(
constants.AGENT_TYPE_LINUXBRIDGE,
portbindings.VIF_TYPE_BRIDGE,
True)
def check_segment_for_agent(self, segment, agent):
mappings = agent['configurations'].get('interface_mappings', {})
tunnel_types = agent['configurations'].get('tunnel_types', [])
LOG.debug(_("Checking segment: %(segment)s "
"for mappings: %(mappings)s "
"with tunnel_types: %(tunnel_types)s"),
{'segment': segment, 'mappings': mappings,
'tunnel_types': tunnel_types})
network_type = segment[api.NETWORK_TYPE]
if network_type == 'local':
return True
elif network_type in tunnel_types:
return True
elif network_type in ['flat', 'vlan']:
return segment[api.PHYSICAL_NETWORK] in mappings
else:
return False