3d62d8e23c
When a vif will be plugged into an OVS bridge, ensure that the bridge exists during the plugging operation. In most cases, the OVS bridge will already exist at the time of port creation, so this will be a no-op. However, the OVS agent implementation for vlan-aware VMs will require the os-vif plugin to create the OVS bridge if it doesn't already exist, because vifs that correspond to trunk ports won't be directly plugged into br-int. Change-Id: I3cb61a5e842177a26f38c85d7782ecced4ac07da
171 lines
6.7 KiB
Python
171 lines
6.7 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 constants
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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 OvsPlugin(plugin.PluginBase):
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"""An OVS plugin that can setup VIFs in many ways
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The OVS plugin supports several different VIF types, VIFBridge
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and VIFOpenVSwitch, and will choose the appropriate plugging
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action depending on the type of VIF config it receives.
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If given a VIFBridge, then it will create connect the VM via
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a regular Linux bridge device to allow security group rules to
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be applied to VM traiffic.
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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 gen_port_name(prefix, id):
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return ("%s%s" % (prefix, id))[:OvsPlugin.NIC_NAME_LEN]
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@staticmethod
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def get_veth_pair_names(vif):
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return (OvsPlugin.gen_port_name("qvb", vif.id),
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OvsPlugin.gen_port_name("qvo", vif.id))
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def describe(self):
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return objects.host_info.HostPluginInfo(
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plugin_name="ovs",
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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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objects.host_info.HostVIFInfo(
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vif_object_name=objects.vif.VIFOpenVSwitch.__name__,
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min_version="1.0",
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max_version="1.0"),
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objects.host_info.HostVIFInfo(
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vif_object_name=objects.vif.VIFVHostUser.__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_vhostuser(self, vif, instance_info):
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linux_net.ensure_ovs_bridge(vif.network.bridge,
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constants.OVS_DATAPATH_NETDEV)
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linux_net.create_ovs_vif_port(
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vif.network.bridge,
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OvsPlugin.gen_port_name("vhu", vif.id),
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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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interface_type=constants.OVS_VHOSTUSER_INTERFACE_TYPE)
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def _plug_bridge(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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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.ensure_ovs_bridge(vif.network.bridge,
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constants.OVS_DATAPATH_SYSTEM)
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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 plug(self, vif, instance_info):
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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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if isinstance(vif, objects.vif.VIFOpenVSwitch):
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linux_net.ensure_ovs_bridge(vif.network.bridge,
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constants.OVS_DATAPATH_SYSTEM)
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elif isinstance(vif, objects.vif.VIFBridge):
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self._plug_bridge(vif, instance_info)
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elif isinstance(vif, objects.vif.VIFVHostUser):
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self._plug_vhostuser(vif, instance_info)
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def _unplug_vhostuser(self, vif, instance_info):
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linux_net.delete_ovs_vif_port(vif.network.bridge,
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OvsPlugin.gen_port_name("vhu", vif.id),
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timeout=self.config.ovs_vsctl_timeout)
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def _unplug_bridge(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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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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def unplug(self, vif, instance_info):
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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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if isinstance(vif, objects.vif.VIFOpenVSwitch):
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pass # no special unplugging required
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elif isinstance(vif, objects.vif.VIFBridge):
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self._unplug_bridge(vif, instance_info)
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elif isinstance(vif, objects.vif.VIFVHostUser):
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self._unplug_vhostuser(vif, instance_info)
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