117 lines
4.2 KiB
Python
117 lines
4.2 KiB
Python
# Derived from nova/virt/libvirt/vif.py
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#
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# Copyright (C) 2011 Midokura KK
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# Copyright (C) 2011 Nicira, Inc
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# Copyright 2011 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 os_vif import objects
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from os_vif import plugin
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from oslo_config import cfg
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from vif_plug_ovs import exception
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from vif_plug_ovs import linux_net
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class OvsHybridPlugin(plugin.PluginBase):
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"""
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An OVS VIF type that uses a pair of devices in order to allow
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security group rules to be applied to traffic coming in or out of
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a virtual machine.
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"""
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NIC_NAME_LEN = 14
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CONFIG_OPTS = (
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cfg.IntOpt('network_device_mtu',
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default=1500,
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help='MTU setting for network interface.',
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deprecated_group="DEFAULT"),
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cfg.IntOpt('ovs_vsctl_timeout',
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default=120,
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help='Amount of time, in seconds, that ovs_vsctl should '
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'wait for a response from the database. 0 is to wait '
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'forever.',
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deprecated_group="DEFAULT"),
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)
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@staticmethod
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def get_veth_pair_names(vif):
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iface_id = vif.id
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return (("qvb%s" % iface_id)[:OvsHybridPlugin.NIC_NAME_LEN],
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("qvo%s" % iface_id)[:OvsHybridPlugin.NIC_NAME_LEN])
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def describe(self):
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return objects.host_info.HostPluginInfo(
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plugin_name="ovs_hybrid",
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vif_info=[
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objects.host_info.HostVIFInfo(
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vif_object_name=objects.vif.VIFBridge.__name__,
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min_version="1.0",
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max_version="1.0")
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])
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def plug(self, vif, instance_info):
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"""Plug using hybrid strategy
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Create a per-VIF linux bridge, then link that bridge to the OVS
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integration bridge via a veth device, setting up the other end
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of the veth device just like a normal OVS port. Then boot the
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VIF on the linux bridge using standard libvirt mechanisms.
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"""
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if not hasattr(vif, "port_profile"):
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raise exception.MissingPortProfile()
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if not isinstance(vif.port_profile,
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objects.vif.VIFPortProfileOpenVSwitch):
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raise exception.WrongPortProfile(
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profile=vif.port_profile.__class__.__name__)
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v1_name, v2_name = self.get_veth_pair_names(vif)
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linux_net.ensure_bridge(vif.bridge_name)
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if not linux_net.device_exists(v2_name):
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linux_net.create_veth_pair(v1_name, v2_name,
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self.config.network_device_mtu)
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linux_net.add_bridge_port(vif.bridge_name, v1_name)
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linux_net.create_ovs_vif_port(
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vif.network.bridge,
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v2_name,
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vif.port_profile.interface_id,
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vif.address, instance_info.uuid,
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self.config.network_device_mtu,
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timeout=self.config.ovs_vsctl_timeout)
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def unplug(self, vif, instance_info):
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"""UnPlug using hybrid strategy
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Unhook port from OVS, unhook port from bridge, delete
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bridge, and delete both veth devices.
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"""
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if not hasattr(vif, "port_profile"):
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raise exception.MissingPortProfile()
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if not isinstance(vif.port_profile,
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objects.vif.VIFPortProfileOpenVSwitch):
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raise exception.WrongPortProfile(
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profile=vif.port_profile.__class__.__name__)
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v1_name, v2_name = self.get_veth_pair_names(vif)
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linux_net.delete_bridge(vif.bridge_name, v1_name)
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linux_net.delete_ovs_vif_port(vif.network.bridge, v2_name,
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timeout=self.config.ovs_vsctl_timeout)
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