# 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. import sys from os_vif import objects from os_vif import plugin from oslo_config import cfg from vif_plug_ovs import constants from vif_plug_ovs import exception from vif_plug_ovs import linux_net class OvsPlugin(plugin.PluginBase): """An OVS plugin that can setup VIFs in many ways The OVS plugin supports several different VIF types, VIFBridge and VIFOpenVSwitch, and will choose the appropriate plugging action depending on the type of VIF config it receives. If given a VIFBridge, then it will create connect the VM via a regular Linux bridge device to allow security group rules to be applied to VM traiffic. """ NIC_NAME_LEN = 14 CONFIG_OPTS = ( cfg.IntOpt('network_device_mtu', default=1500, help='MTU setting for network interface.', deprecated_group="DEFAULT"), cfg.IntOpt('ovs_vsctl_timeout', default=120, help='Amount of time, in seconds, that ovs_vsctl should ' 'wait for a response from the database. 0 is to wait ' 'forever.', deprecated_group="DEFAULT"), ) @staticmethod def gen_port_name(prefix, id): return ("%s%s" % (prefix, id))[:OvsPlugin.NIC_NAME_LEN] @staticmethod def get_veth_pair_names(vif): return (OvsPlugin.gen_port_name("qvb", vif.id), OvsPlugin.gen_port_name("qvo", vif.id)) def describe(self): return objects.host_info.HostPluginInfo( plugin_name="ovs", vif_info=[ objects.host_info.HostVIFInfo( vif_object_name=objects.vif.VIFBridge.__name__, min_version="1.0", max_version="1.0"), objects.host_info.HostVIFInfo( vif_object_name=objects.vif.VIFOpenVSwitch.__name__, min_version="1.0", max_version="1.0"), objects.host_info.HostVIFInfo( vif_object_name=objects.vif.VIFVHostUser.__name__, min_version="1.0", max_version="1.0") ]) def _get_mtu(self, vif): if vif.network and vif.network.mtu: return vif.network.mtu return self.config.network_device_mtu def _create_vif_port(self, vif, vif_name, instance_info, **kwargs): mtu = self._get_mtu(vif) linux_net.create_ovs_vif_port( vif.network.bridge, vif_name, vif.port_profile.interface_id, vif.address, instance_info.uuid, mtu, timeout=self.config.ovs_vsctl_timeout, **kwargs) def _update_vif_port(self, vif, vif_name): mtu = self._get_mtu(vif) linux_net.update_ovs_vif_port(vif_name, mtu) def _plug_vhostuser(self, vif, instance_info): linux_net.ensure_ovs_bridge(vif.network.bridge, constants.OVS_DATAPATH_NETDEV) vif_name = OvsPlugin.gen_port_name( constants.OVS_VHOSTUSER_PREFIX, vif.id) args = {} if vif.mode == "client": args['interface_type'] = \ constants.OVS_VHOSTUSER_INTERFACE_TYPE else: args['interface_type'] = \ constants.OVS_VHOSTUSER_CLIENT_INTERFACE_TYPE args['vhost_server_path'] = vif.path self._create_vif_port( vif, vif_name, instance_info, **args) def _plug_bridge(self, vif, instance_info): """Plug using hybrid strategy Create a per-VIF linux bridge, then link that bridge to the OVS integration bridge via a veth device, setting up the other end of the veth device just like a normal OVS port. Then boot the VIF on the linux bridge using standard libvirt mechanisms. """ v1_name, v2_name = self.get_veth_pair_names(vif) linux_net.ensure_bridge(vif.bridge_name) mtu = self._get_mtu(vif) if not linux_net.device_exists(v2_name): linux_net.create_veth_pair(v1_name, v2_name, mtu) linux_net.add_bridge_port(vif.bridge_name, v1_name) linux_net.ensure_ovs_bridge(vif.network.bridge, constants.OVS_DATAPATH_SYSTEM) self._create_vif_port(vif, v2_name, instance_info) else: linux_net.update_veth_pair(v1_name, v2_name, mtu) self._update_vif_port(vif, v2_name) def _plug_vif_windows(self, vif, instance_info): """Create a per-VIF OVS port.""" if not linux_net.device_exists(vif.id): linux_net.ensure_ovs_bridge(vif.network.bridge, constants.OVS_DATAPATH_SYSTEM) self._create_vif_port(vif, vif.id, instance_info) def plug(self, vif, instance_info): if not hasattr(vif, "port_profile"): raise exception.MissingPortProfile() if not isinstance(vif.port_profile, objects.vif.VIFPortProfileOpenVSwitch): raise exception.WrongPortProfile( profile=vif.port_profile.__class__.__name__) if isinstance(vif, objects.vif.VIFOpenVSwitch): if sys.platform != constants.PLATFORM_WIN32: linux_net.ensure_ovs_bridge(vif.network.bridge, constants.OVS_DATAPATH_SYSTEM) else: self._plug_vif_windows(vif, instance_info) elif isinstance(vif, objects.vif.VIFBridge): if sys.platform != constants.PLATFORM_WIN32: self._plug_bridge(vif, instance_info) else: self._plug_vif_windows(vif, instance_info) elif isinstance(vif, objects.vif.VIFVHostUser): self._plug_vhostuser(vif, instance_info) def _unplug_vhostuser(self, vif, instance_info): linux_net.delete_ovs_vif_port(vif.network.bridge, OvsPlugin.gen_port_name( constants.OVS_VHOSTUSER_PREFIX, vif.id), timeout=self.config.ovs_vsctl_timeout) def _unplug_bridge(self, vif, instance_info): """UnPlug using hybrid strategy Unhook port from OVS, unhook port from bridge, delete bridge, and delete both veth devices. """ v1_name, v2_name = self.get_veth_pair_names(vif) linux_net.delete_bridge(vif.bridge_name, v1_name) linux_net.delete_ovs_vif_port(vif.network.bridge, v2_name, timeout=self.config.ovs_vsctl_timeout) def _unplug_vif_windows(self, vif, instance_info): """Remove port from OVS.""" linux_net.delete_ovs_vif_port(vif.network.bridge, vif.id, timeout=self.config.ovs_vsctl_timeout) def unplug(self, vif, instance_info): if not hasattr(vif, "port_profile"): raise exception.MissingPortProfile() if not isinstance(vif.port_profile, objects.vif.VIFPortProfileOpenVSwitch): raise exception.WrongPortProfile( profile=vif.port_profile.__class__.__name__) if isinstance(vif, objects.vif.VIFOpenVSwitch): if sys.platform == constants.PLATFORM_WIN32: self._unplug_vif_windows(vif, instance_info) elif isinstance(vif, objects.vif.VIFBridge): if sys.platform != constants.PLATFORM_WIN32: self._unplug_bridge(vif, instance_info) else: self._unplug_vif_windows(vif, instance_info) elif isinstance(vif, objects.vif.VIFVHostUser): self._unplug_vhostuser(vif, instance_info)