os-vif/vif_plug_linux_bridge/linux_bridge.py
Daniel P. Berrange 9686110d53 os-vif: introduce a ComputeInfo object to represent compute info
When a compute service is allocating ports with the network service,
it needs to pass across information about the capabilities of the
compute host. Currently each plugin provides information about its
own capabilities. This introduces a ComputeInfo class which,
initially, just contains a dict of PluginInfo classes.

With this change, there is a versioning constraint between the
compute and network hosts. The compute host must not pass the network
host a ComputeInfo object with a version that the network host
is unable to deserialize(). This implies that as a general rule the
version of os-vif on the network host must be at least as new as the
version on the compute hosts. During a live upgrade, the network
hosts must be upgraded before the compute hosts.

Change-Id: I7b51c97b5e03ffa51a56ceb3d4f97e188508379d
2016-03-18 13:37:33 +00:00

111 lines
4.4 KiB
Python

# Derived from nova/virt/libvirt/vif.py
#
# Copyright (C) 2011 Midokura KK
# Copyright (C) 2011 Nicira, Inc
# Copyright 2011 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 os_vif import objects
from os_vif import plugin
from oslo_config import cfg
from vif_plug_linux_bridge import iptables
from vif_plug_linux_bridge import linux_net
class LinuxBridgePlugin(plugin.PluginBase):
"""A VIF type that uses a standard Linux bridge device."""
CONFIG_OPTS = (
cfg.BoolOpt('use_ipv6',
default=False,
help='Use IPv6',
deprecated_group="DEFAULT"),
cfg.StrOpt('iptables_top_regex',
default='',
help='Regular expression to match the iptables rule that '
'should always be on the top.',
deprecated_group="DEFAULT"),
cfg.StrOpt('iptables_bottom_regex',
default='',
help='Regular expression to match the iptables rule that '
'should always be on the bottom.',
deprecated_group="DEFAULT"),
cfg.StrOpt('iptables_drop_action',
default='DROP',
help='The table that iptables to jump to when a packet is '
'to be dropped.',
deprecated_group="DEFAULT"),
cfg.MultiStrOpt('forward_bridge_interface',
default=['all'],
help='An interface that bridges can forward to. If '
'this is set to all then all traffic will be '
'forwarded. Can be specified multiple times.',
deprecated_group="DEFAULT"),
cfg.StrOpt('vlan_interface',
help='VLANs will bridge into this interface if set',
deprecated_group="DEFAULT"),
cfg.StrOpt('flat_interface',
help='FlatDhcp will bridge into this interface if set',
deprecated_group="DEFAULT"),
cfg.IntOpt('network_device_mtu',
default=1500,
help='MTU setting for network interface.',
deprecated_group="DEFAULT"),
)
def __init__(self, config):
super(LinuxBridgePlugin, self).__init__(config)
ipm = iptables.IptablesManager(
use_ipv6=config.use_ipv6,
iptables_top_regex=config.iptables_top_regex,
iptables_bottom_regex=config.iptables_bottom_regex,
iptables_drop_action=config.iptables_drop_action,
forward_bridge_interface=config.forward_bridge_interface)
linux_net.configure(ipm)
def describe(self):
return objects.host_info.HostPluginInfo(
plugin_name="linux_bridge",
vif_info=[
objects.host_info.HostVIFInfo(
vif_object_name=objects.vif.VIFBridge.__name__,
min_version="1.0",
max_version="1.0")
])
def plug(self, vif, instance_info):
"""Ensure that the bridge exists, and add VIF to it."""
network = vif.network
bridge_name = vif.bridge_name
if not network.multi_host and network.should_provide_bridge:
if network.should_provide_vlan:
iface = self.config.vlan_interface or network.bridge_interface
mtu = self.config.network_device_mtu
linux_net.ensure_vlan_bridge(network.vlan,
bridge_name, iface, mtu=mtu)
else:
iface = self.config.flat_interface or network.bridge_interface
linux_net.ensure_bridge(bridge_name, iface)
def unplug(self, vif, instance_info):
# Nothing required to unplug a port for a VIF using standard
# Linux bridge device...
pass