#!/usr/bin/env python # Copyright 2011 VMware, Inc. # 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 hashlib import signal import sys import time import eventlet eventlet.monkey_patch() import netaddr from oslo.config import cfg from six import moves from neutron.agent import l2population_rpc from neutron.agent.linux import ip_lib from neutron.agent.linux import ovs_lib from neutron.agent.linux import polling from neutron.agent.linux import utils from neutron.agent import rpc as agent_rpc from neutron.agent import securitygroups_rpc as sg_rpc from neutron.common import config as common_config from neutron.common import constants as q_const from neutron.common import rpc as n_rpc from neutron.common import topics from neutron.common import utils as q_utils from neutron import context from neutron.openstack.common import log as logging from neutron.openstack.common import loopingcall from neutron.plugins.common import constants as p_const from neutron.plugins.openvswitch.common import config # noqa from neutron.plugins.openvswitch.common import constants LOG = logging.getLogger(__name__) # A placeholder for dead vlans. DEAD_VLAN_TAG = str(q_const.MAX_VLAN_TAG + 1) # A class to represent a VIF (i.e., a port that has 'iface-id' and 'vif-mac' # attributes set). class LocalVLANMapping: def __init__(self, vlan, network_type, physical_network, segmentation_id, vif_ports=None): if vif_ports is None: vif_ports = {} self.vlan = vlan self.network_type = network_type self.physical_network = physical_network self.segmentation_id = segmentation_id self.vif_ports = vif_ports # set of tunnel ports on which packets should be flooded self.tun_ofports = set() def __str__(self): return ("lv-id = %s type = %s phys-net = %s phys-id = %s" % (self.vlan, self.network_type, self.physical_network, self.segmentation_id)) class OVSPluginApi(agent_rpc.PluginApi, sg_rpc.SecurityGroupServerRpcApiMixin): pass class OVSSecurityGroupAgent(sg_rpc.SecurityGroupAgentRpcMixin): def __init__(self, context, plugin_rpc, root_helper): self.context = context self.plugin_rpc = plugin_rpc self.root_helper = root_helper self.init_firewall(defer_refresh_firewall=True) class OVSNeutronAgent(n_rpc.RpcCallback, sg_rpc.SecurityGroupAgentRpcCallbackMixin, l2population_rpc.L2populationRpcCallBackMixin): '''Implements OVS-based tunneling, VLANs and flat networks. Two local bridges are created: an integration bridge (defaults to 'br-int') and a tunneling bridge (defaults to 'br-tun'). An additional bridge is created for each physical network interface used for VLANs and/or flat networks. All VM VIFs are plugged into the integration bridge. VM VIFs on a given virtual network share a common "local" VLAN (i.e. not propagated externally). The VLAN id of this local VLAN is mapped to the physical networking details realizing that virtual network. For virtual networks realized as GRE tunnels, a Logical Switch (LS) identifier is used to differentiate tenant traffic on inter-HV tunnels. A mesh of tunnels is created to other Hypervisors in the cloud. These tunnels originate and terminate on the tunneling bridge of each hypervisor. Port patching is done to connect local VLANs on the integration bridge to inter-hypervisor tunnels on the tunnel bridge. For each virtual network realized as a VLAN or flat network, a veth is used to connect the local VLAN on the integration bridge with the physical network bridge, with flow rules adding, modifying, or stripping VLAN tags as necessary. ''' # history # 1.0 Initial version # 1.1 Support Security Group RPC RPC_API_VERSION = '1.1' def __init__(self, integ_br, tun_br, local_ip, bridge_mappings, root_helper, polling_interval, tunnel_types=None, veth_mtu=None, l2_population=False, minimize_polling=False, ovsdb_monitor_respawn_interval=( constants.DEFAULT_OVSDBMON_RESPAWN), arp_responder=False): '''Constructor. :param integ_br: name of the integration bridge. :param tun_br: name of the tunnel bridge. :param local_ip: local IP address of this hypervisor. :param bridge_mappings: mappings from physical network name to bridge. :param root_helper: utility to use when running shell cmds. :param polling_interval: interval (secs) to poll DB. :param tunnel_types: A list of tunnel types to enable support for in the agent. If set, will automatically set enable_tunneling to True. :param veth_mtu: MTU size for veth interfaces. :param l2_population: Optional, whether L2 population is turned on :param minimize_polling: Optional, whether to minimize polling by monitoring ovsdb for interface changes. :param ovsdb_monitor_respawn_interval: Optional, when using polling minimization, the number of seconds to wait before respawning the ovsdb monitor. :param arp_responder: Optional, enable local ARP responder if it is supported. ''' super(OVSNeutronAgent, self).__init__() self.veth_mtu = veth_mtu self.root_helper = root_helper self.available_local_vlans = set(moves.xrange(q_const.MIN_VLAN_TAG, q_const.MAX_VLAN_TAG)) self.tunnel_types = tunnel_types or [] self.l2_pop = l2_population # TODO(ethuleau): Initially, local ARP responder is be dependent to the # ML2 l2 population mechanism driver. self.arp_responder_enabled = (arp_responder and self._check_arp_responder_support() and self.l2_pop) self.agent_state = { 'binary': 'neutron-openvswitch-agent', 'host': cfg.CONF.host, 'topic': q_const.L2_AGENT_TOPIC, 'configurations': {'bridge_mappings': bridge_mappings, 'tunnel_types': self.tunnel_types, 'tunneling_ip': local_ip, 'l2_population': self.l2_pop, 'arp_responder_enabled': self.arp_responder_enabled}, 'agent_type': q_const.AGENT_TYPE_OVS, 'start_flag': True} # Keep track of int_br's device count for use by _report_state() self.int_br_device_count = 0 self.int_br = ovs_lib.OVSBridge(integ_br, self.root_helper) self.int_br.set_secure_mode() # Stores port update notifications for processing in main rpc loop self.updated_ports = set() self.setup_rpc() self.setup_integration_br() self.bridge_mappings = bridge_mappings self.setup_physical_bridges(self.bridge_mappings) self.local_vlan_map = {} self.tun_br_ofports = {p_const.TYPE_GRE: {}, p_const.TYPE_VXLAN: {}} self.polling_interval = polling_interval self.minimize_polling = minimize_polling self.ovsdb_monitor_respawn_interval = ovsdb_monitor_respawn_interval if tunnel_types: self.enable_tunneling = True else: self.enable_tunneling = False self.local_ip = local_ip self.tunnel_count = 0 self.vxlan_udp_port = cfg.CONF.AGENT.vxlan_udp_port self.dont_fragment = cfg.CONF.AGENT.dont_fragment self.tun_br = None if self.enable_tunneling: self.setup_tunnel_br(tun_br) # Collect additional bridges to monitor self.ancillary_brs = self.setup_ancillary_bridges(integ_br, tun_br) # Security group agent support self.sg_agent = OVSSecurityGroupAgent(self.context, self.plugin_rpc, root_helper) # Initialize iteration counter self.iter_num = 0 def _check_arp_responder_support(self): '''Check if OVS supports to modify ARP headers. This functionality is only available since the development branch 2.1. ''' args = ['arp,action=load:0x2->NXM_OF_ARP_OP[],' 'move:NXM_NX_ARP_SHA[]->NXM_NX_ARP_THA[],' 'move:NXM_OF_ARP_SPA[]->NXM_OF_ARP_TPA[]'] supported = ovs_lib.ofctl_arg_supported(self.root_helper, 'add-flow', args) if not supported: LOG.warning(_('OVS version can not support ARP responder.')) return supported def _report_state(self): # How many devices are likely used by a VM self.agent_state.get('configurations')['devices'] = ( self.int_br_device_count) try: self.state_rpc.report_state(self.context, self.agent_state) self.agent_state.pop('start_flag', None) except Exception: LOG.exception(_("Failed reporting state!")) def setup_rpc(self): self.agent_id = 'ovs-agent-%s' % cfg.CONF.host self.topic = topics.AGENT self.plugin_rpc = OVSPluginApi(topics.PLUGIN) self.state_rpc = agent_rpc.PluginReportStateAPI(topics.PLUGIN) # RPC network init self.context = context.get_admin_context_without_session() # Handle updates from service self.endpoints = [self] # Define the listening consumers for the agent consumers = [[topics.PORT, topics.UPDATE], [topics.NETWORK, topics.DELETE], [constants.TUNNEL, topics.UPDATE], [topics.SECURITY_GROUP, topics.UPDATE]] if self.l2_pop: consumers.append([topics.L2POPULATION, topics.UPDATE, cfg.CONF.host]) self.connection = agent_rpc.create_consumers(self.endpoints, self.topic, consumers) report_interval = cfg.CONF.AGENT.report_interval if report_interval: heartbeat = loopingcall.FixedIntervalLoopingCall( self._report_state) heartbeat.start(interval=report_interval) def get_net_uuid(self, vif_id): for network_id, vlan_mapping in self.local_vlan_map.iteritems(): if vif_id in vlan_mapping.vif_ports: return network_id def network_delete(self, context, **kwargs): LOG.debug(_("network_delete received")) network_id = kwargs.get('network_id') LOG.debug(_("Delete %s"), network_id) # The network may not be defined on this agent lvm = self.local_vlan_map.get(network_id) if lvm: self.reclaim_local_vlan(network_id) else: LOG.debug(_("Network %s not used on agent."), network_id) def port_update(self, context, **kwargs): port = kwargs.get('port') # Put the port identifier in the updated_ports set. # Even if full port details might be provided to this call, # they are not used since there is no guarantee the notifications # are processed in the same order as the relevant API requests self.updated_ports.add(port['id']) LOG.debug(_("port_update message processed for port %s"), port['id']) def tunnel_update(self, context, **kwargs): LOG.debug(_("tunnel_update received")) if not self.enable_tunneling: return tunnel_ip = kwargs.get('tunnel_ip') tunnel_id = kwargs.get('tunnel_id', self.get_ip_in_hex(tunnel_ip)) if not tunnel_id: return tunnel_type = kwargs.get('tunnel_type') if not tunnel_type: LOG.error(_("No tunnel_type specified, cannot create tunnels")) return if tunnel_type not in self.tunnel_types: LOG.error(_("tunnel_type %s not supported by agent"), tunnel_type) return if tunnel_ip == self.local_ip: return tun_name = '%s-%s' % (tunnel_type, tunnel_id) if not self.l2_pop: self.setup_tunnel_port(tun_name, tunnel_ip, tunnel_type) def fdb_add(self, context, fdb_entries): LOG.debug(_("fdb_add received")) for network_id, values in fdb_entries.items(): lvm = self.local_vlan_map.get(network_id) if not lvm: # Agent doesn't manage any port in this network continue agent_ports = values.get('ports') agent_ports.pop(self.local_ip, None) if len(agent_ports): self.tun_br.defer_apply_on() for agent_ip, ports in agent_ports.items(): # Ensure we have a tunnel port with this remote agent ofport = self.tun_br_ofports[ lvm.network_type].get(agent_ip) if not ofport: remote_ip_hex = self.get_ip_in_hex(agent_ip) if not remote_ip_hex: continue port_name = '%s-%s' % (lvm.network_type, remote_ip_hex) ofport = self.setup_tunnel_port(port_name, agent_ip, lvm.network_type) if ofport == 0: continue for port in ports: self._add_fdb_flow(port, lvm, ofport) self.tun_br.defer_apply_off() def fdb_remove(self, context, fdb_entries): LOG.debug(_("fdb_remove received")) for network_id, values in fdb_entries.items(): lvm = self.local_vlan_map.get(network_id) if not lvm: # Agent doesn't manage any more ports in this network continue agent_ports = values.get('ports') agent_ports.pop(self.local_ip, None) if len(agent_ports): self.tun_br.defer_apply_on() for agent_ip, ports in agent_ports.items(): ofport = self.tun_br_ofports[ lvm.network_type].get(agent_ip) if not ofport: continue for port in ports: self._del_fdb_flow(port, lvm, ofport) self.tun_br.defer_apply_off() def _add_fdb_flow(self, port_info, lvm, ofport): if port_info == q_const.FLOODING_ENTRY: lvm.tun_ofports.add(ofport) ofports = ','.join(lvm.tun_ofports) self.tun_br.mod_flow(table=constants.FLOOD_TO_TUN, dl_vlan=lvm.vlan, actions="strip_vlan,set_tunnel:%s," "output:%s" % (lvm.segmentation_id, ofports)) else: self._set_arp_responder('add', lvm.vlan, port_info[0], port_info[1]) self.tun_br.add_flow(table=constants.UCAST_TO_TUN, priority=2, dl_vlan=lvm.vlan, dl_dst=port_info[0], actions="strip_vlan,set_tunnel:%s,output:%s" % (lvm.segmentation_id, ofport)) def _del_fdb_flow(self, port_info, lvm, ofport): if port_info == q_const.FLOODING_ENTRY: lvm.tun_ofports.remove(ofport) if len(lvm.tun_ofports) > 0: ofports = ','.join(lvm.tun_ofports) self.tun_br.mod_flow(table=constants.FLOOD_TO_TUN, dl_vlan=lvm.vlan, actions="strip_vlan," "set_tunnel:%s,output:%s" % (lvm.segmentation_id, ofports)) else: # This local vlan doesn't require any more tunnelling self.tun_br.delete_flows(table=constants.FLOOD_TO_TUN, dl_vlan=lvm.vlan) # Check if this tunnel port is still used self.cleanup_tunnel_port(ofport, lvm.network_type) else: self._set_arp_responder('remove', lvm.vlan, port_info[0], port_info[1]) self.tun_br.delete_flows(table=constants.UCAST_TO_TUN, dl_vlan=lvm.vlan, dl_dst=port_info[0]) def _fdb_chg_ip(self, context, fdb_entries): '''fdb update when an IP of a port is updated. The ML2 l2-pop mechanism driver send an fdb update rpc message when an IP of a port is updated. :param context: RPC context. :param fdb_entries: fdb dicts that contain all mac/IP informations per agent and network. {'net1': {'agent_ip': {'before': [[mac, ip]], 'after': [[mac, ip]] } } 'net2': ... } ''' LOG.debug(_("update chg_ip received")) # TODO(ethuleau): Use OVS defer apply flows for all rules will be an # interesting improvement here. But actually, OVS lib defer apply flows # methods doesn't ensure the add flows will be applied before delete. for network_id, agent_ports in fdb_entries.items(): lvm = self.local_vlan_map.get(network_id) if not lvm: continue for agent_ip, state in agent_ports.items(): if agent_ip == self.local_ip: continue after = state.get('after') for mac, ip in after: self._set_arp_responder('add', lvm.vlan, mac, ip) before = state.get('before') for mac, ip in before: self._set_arp_responder('remove', lvm.vlan, mac, ip) def fdb_update(self, context, fdb_entries): LOG.debug(_("fdb_update received")) for action, values in fdb_entries.items(): method = '_fdb_' + action if not hasattr(self, method): raise NotImplementedError() getattr(self, method)(context, values) def _set_arp_responder(self, action, lvid, mac_str, ip_str): '''Set the ARP respond entry. When the l2 population mechanism driver and OVS supports to edit ARP fields, a table (ARP_RESPONDER) to resolve ARP locally is added to the tunnel bridge. :param action: add or remove ARP entry. :param lvid: local VLAN map of network's ARP entry. :param mac_str: MAC string value. :param ip_str: IP string value. ''' if not self.arp_responder_enabled: return mac = netaddr.EUI(mac_str, dialect=netaddr.mac_unix) ip = netaddr.IPAddress(ip_str) if action == 'add': actions = ('move:NXM_OF_ETH_SRC[]->NXM_OF_ETH_DST[],' 'mod_dl_src:%(mac)s,' 'load:0x2->NXM_OF_ARP_OP[],' 'move:NXM_NX_ARP_SHA[]->NXM_NX_ARP_THA[],' 'move:NXM_OF_ARP_SPA[]->NXM_OF_ARP_TPA[],' 'load:%(mac)#x->NXM_NX_ARP_SHA[],' 'load:%(ip)#x->NXM_OF_ARP_SPA[],' 'in_port' % {'mac': mac, 'ip': ip}) self.tun_br.add_flow(table=constants.ARP_RESPONDER, priority=1, proto='arp', dl_vlan=lvid, nw_dst='%s' % ip, actions=actions) elif action == 'remove': self.tun_br.delete_flows(table=constants.ARP_RESPONDER, proto='arp', dl_vlan=lvid, nw_dst='%s' % ip) else: LOG.warning(_('Action %s not supported'), action) def provision_local_vlan(self, net_uuid, network_type, physical_network, segmentation_id): '''Provisions a local VLAN. :param net_uuid: the uuid of the network associated with this vlan. :param network_type: the network type ('gre', 'vxlan', 'vlan', 'flat', 'local') :param physical_network: the physical network for 'vlan' or 'flat' :param segmentation_id: the VID for 'vlan' or tunnel ID for 'tunnel' ''' # On a restart or crash of OVS, the network associated with this VLAN # will already be assigned, so check for that here before assigning a # new one. lvm = self.local_vlan_map.get(net_uuid) if lvm: lvid = lvm.vlan else: if not self.available_local_vlans: LOG.error(_("No local VLAN available for net-id=%s"), net_uuid) return lvid = self.available_local_vlans.pop() self.local_vlan_map[net_uuid] = LocalVLANMapping(lvid, network_type, physical_network, segmentation_id) LOG.info(_("Assigning %(vlan_id)s as local vlan for " "net-id=%(net_uuid)s"), {'vlan_id': lvid, 'net_uuid': net_uuid}) if network_type in constants.TUNNEL_NETWORK_TYPES: if self.enable_tunneling: # outbound broadcast/multicast ofports = ','.join(self.tun_br_ofports[network_type].values()) if ofports: self.tun_br.mod_flow(table=constants.FLOOD_TO_TUN, dl_vlan=lvid, actions="strip_vlan," "set_tunnel:%s,output:%s" % (segmentation_id, ofports)) # inbound from tunnels: set lvid in the right table # and resubmit to Table LEARN_FROM_TUN for mac learning self.tun_br.add_flow(table=constants.TUN_TABLE[network_type], priority=1, tun_id=segmentation_id, actions="mod_vlan_vid:%s,resubmit(,%s)" % (lvid, constants.LEARN_FROM_TUN)) else: LOG.error(_("Cannot provision %(network_type)s network for " "net-id=%(net_uuid)s - tunneling disabled"), {'network_type': network_type, 'net_uuid': net_uuid}) elif network_type == p_const.TYPE_FLAT: if physical_network in self.phys_brs: # outbound br = self.phys_brs[physical_network] br.add_flow(priority=4, in_port=self.phys_ofports[physical_network], dl_vlan=lvid, actions="strip_vlan,normal") # inbound self.int_br.add_flow( priority=3, in_port=self.int_ofports[physical_network], dl_vlan=0xffff, actions="mod_vlan_vid:%s,normal" % lvid) else: LOG.error(_("Cannot provision flat network for " "net-id=%(net_uuid)s - no bridge for " "physical_network %(physical_network)s"), {'net_uuid': net_uuid, 'physical_network': physical_network}) elif network_type == p_const.TYPE_VLAN: if physical_network in self.phys_brs: # outbound br = self.phys_brs[physical_network] br.add_flow(priority=4, in_port=self.phys_ofports[physical_network], dl_vlan=lvid, actions="mod_vlan_vid:%s,normal" % segmentation_id) # inbound self.int_br.add_flow(priority=3, in_port=self. int_ofports[physical_network], dl_vlan=segmentation_id, actions="mod_vlan_vid:%s,normal" % lvid) else: LOG.error(_("Cannot provision VLAN network for " "net-id=%(net_uuid)s - no bridge for " "physical_network %(physical_network)s"), {'net_uuid': net_uuid, 'physical_network': physical_network}) elif network_type == p_const.TYPE_LOCAL: # no flows needed for local networks pass else: LOG.error(_("Cannot provision unknown network type " "%(network_type)s for net-id=%(net_uuid)s"), {'network_type': network_type, 'net_uuid': net_uuid}) def reclaim_local_vlan(self, net_uuid): '''Reclaim a local VLAN. :param net_uuid: the network uuid associated with this vlan. :param lvm: a LocalVLANMapping object that tracks (vlan, lsw_id, vif_ids) mapping. ''' lvm = self.local_vlan_map.pop(net_uuid, None) if lvm is None: LOG.debug(_("Network %s not used on agent."), net_uuid) return LOG.info(_("Reclaiming vlan = %(vlan_id)s from net-id = %(net_uuid)s"), {'vlan_id': lvm.vlan, 'net_uuid': net_uuid}) if lvm.network_type in constants.TUNNEL_NETWORK_TYPES: if self.enable_tunneling: self.tun_br.delete_flows( table=constants.TUN_TABLE[lvm.network_type], tun_id=lvm.segmentation_id) self.tun_br.delete_flows(dl_vlan=lvm.vlan) if self.l2_pop: # Try to remove tunnel ports if not used by other networks for ofport in lvm.tun_ofports: self.cleanup_tunnel_port(ofport, lvm.network_type) elif lvm.network_type == p_const.TYPE_FLAT: if lvm.physical_network in self.phys_brs: # outbound br = self.phys_brs[lvm.physical_network] br.delete_flows(in_port=self.phys_ofports[lvm. physical_network], dl_vlan=lvm.vlan) # inbound br = self.int_br br.delete_flows(in_port=self.int_ofports[lvm.physical_network], dl_vlan=0xffff) elif lvm.network_type == p_const.TYPE_VLAN: if lvm.physical_network in self.phys_brs: # outbound br = self.phys_brs[lvm.physical_network] br.delete_flows(in_port=self.phys_ofports[lvm. physical_network], dl_vlan=lvm.vlan) # inbound br = self.int_br br.delete_flows(in_port=self.int_ofports[lvm.physical_network], dl_vlan=lvm.segmentation_id) elif lvm.network_type == p_const.TYPE_LOCAL: # no flows needed for local networks pass else: LOG.error(_("Cannot reclaim unknown network type " "%(network_type)s for net-id=%(net_uuid)s"), {'network_type': lvm.network_type, 'net_uuid': net_uuid}) self.available_local_vlans.add(lvm.vlan) def port_bound(self, port, net_uuid, network_type, physical_network, segmentation_id, ovs_restarted): '''Bind port to net_uuid/lsw_id and install flow for inbound traffic to vm. :param port: a ovslib.VifPort object. :param net_uuid: the net_uuid this port is to be associated with. :param network_type: the network type ('gre', 'vlan', 'flat', 'local') :param physical_network: the physical network for 'vlan' or 'flat' :param segmentation_id: the VID for 'vlan' or tunnel ID for 'tunnel' :param ovs_restarted: indicates if this is called for an OVS restart. ''' if net_uuid not in self.local_vlan_map or ovs_restarted: self.provision_local_vlan(net_uuid, network_type, physical_network, segmentation_id) lvm = self.local_vlan_map[net_uuid] lvm.vif_ports[port.vif_id] = port # Do not bind a port if it's already bound cur_tag = self.int_br.db_get_val("Port", port.port_name, "tag") if cur_tag != str(lvm.vlan): self.int_br.set_db_attribute("Port", port.port_name, "tag", str(lvm.vlan)) if port.ofport != -1: self.int_br.delete_flows(in_port=port.ofport) def port_unbound(self, vif_id, net_uuid=None): '''Unbind port. Removes corresponding local vlan mapping object if this is its last VIF. :param vif_id: the id of the vif :param net_uuid: the net_uuid this port is associated with. ''' if net_uuid is None: net_uuid = self.get_net_uuid(vif_id) if not self.local_vlan_map.get(net_uuid): LOG.info(_('port_unbound() net_uuid %s not in local_vlan_map'), net_uuid) return lvm = self.local_vlan_map[net_uuid] lvm.vif_ports.pop(vif_id, None) if not lvm.vif_ports: self.reclaim_local_vlan(net_uuid) def port_dead(self, port): '''Once a port has no binding, put it on the "dead vlan". :param port: a ovs_lib.VifPort object. ''' # Don't kill a port if it's already dead cur_tag = self.int_br.db_get_val("Port", port.port_name, "tag") if cur_tag != DEAD_VLAN_TAG: self.int_br.set_db_attribute("Port", port.port_name, "tag", DEAD_VLAN_TAG) self.int_br.add_flow(priority=2, in_port=port.ofport, actions="drop") def setup_integration_br(self): '''Setup the integration bridge. Create patch ports and remove all existing flows. :param bridge_name: the name of the integration bridge. :returns: the integration bridge ''' self.int_br.delete_port(cfg.CONF.OVS.int_peer_patch_port) self.int_br.remove_all_flows() # switch all traffic using L2 learning self.int_br.add_flow(priority=1, actions="normal") # Add a canary flow to int_br to track OVS restarts self.int_br.add_flow(table=constants.CANARY_TABLE, priority=0, actions="drop") def setup_ancillary_bridges(self, integ_br, tun_br): '''Setup ancillary bridges - for example br-ex.''' ovs_bridges = set(ovs_lib.get_bridges(self.root_helper)) # Remove all known bridges ovs_bridges.remove(integ_br) if self.enable_tunneling: ovs_bridges.remove(tun_br) br_names = [self.phys_brs[physical_network].br_name for physical_network in self.phys_brs] ovs_bridges.difference_update(br_names) # Filter list of bridges to those that have external # bridge-id's configured br_names = [] for bridge in ovs_bridges: id = ovs_lib.get_bridge_external_bridge_id(self.root_helper, bridge) if id != bridge: br_names.append(bridge) ovs_bridges.difference_update(br_names) ancillary_bridges = [] for bridge in ovs_bridges: br = ovs_lib.OVSBridge(bridge, self.root_helper) LOG.info(_('Adding %s to list of bridges.'), bridge) ancillary_bridges.append(br) return ancillary_bridges def setup_tunnel_br(self, tun_br=None): '''Setup the tunnel bridge. Creates tunnel bridge, and links it to the integration bridge using a patch port. :param tun_br: the name of the tunnel bridge. ''' if not self.tun_br: self.tun_br = ovs_lib.OVSBridge(tun_br, self.root_helper) self.tun_br.reset_bridge() self.patch_tun_ofport = self.int_br.add_patch_port( cfg.CONF.OVS.int_peer_patch_port, cfg.CONF.OVS.tun_peer_patch_port) self.patch_int_ofport = self.tun_br.add_patch_port( cfg.CONF.OVS.tun_peer_patch_port, cfg.CONF.OVS.int_peer_patch_port) if int(self.patch_tun_ofport) < 0 or int(self.patch_int_ofport) < 0: LOG.error(_("Failed to create OVS patch port. Cannot have " "tunneling enabled on this agent, since this version " "of OVS does not support tunnels or patch ports. " "Agent terminated!")) exit(1) self.tun_br.remove_all_flows() # Table 0 (default) will sort incoming traffic depending on in_port self.tun_br.add_flow(priority=1, in_port=self.patch_int_ofport, actions="resubmit(,%s)" % constants.PATCH_LV_TO_TUN) self.tun_br.add_flow(priority=0, actions="drop") if self.arp_responder_enabled: # ARP broadcast-ed request go to the local ARP_RESPONDER table to # be locally resolved self.tun_br.add_flow(table=constants.PATCH_LV_TO_TUN, priority=1, proto='arp', dl_dst="ff:ff:ff:ff:ff:ff", actions=("resubmit(,%s)" % constants.ARP_RESPONDER)) # PATCH_LV_TO_TUN table will handle packets coming from patch_int # unicasts go to table UCAST_TO_TUN where remote addresses are learnt self.tun_br.add_flow(table=constants.PATCH_LV_TO_TUN, priority=0, dl_dst="00:00:00:00:00:00/01:00:00:00:00:00", actions="resubmit(,%s)" % constants.UCAST_TO_TUN) # Broadcasts/multicasts go to table FLOOD_TO_TUN that handles flooding self.tun_br.add_flow(table=constants.PATCH_LV_TO_TUN, priority=0, dl_dst="01:00:00:00:00:00/01:00:00:00:00:00", actions="resubmit(,%s)" % constants.FLOOD_TO_TUN) # Tables [tunnel_type]_TUN_TO_LV will set lvid depending on tun_id # for each tunnel type, and resubmit to table LEARN_FROM_TUN where # remote mac addresses will be learnt for tunnel_type in constants.TUNNEL_NETWORK_TYPES: self.tun_br.add_flow(table=constants.TUN_TABLE[tunnel_type], priority=0, actions="drop") # LEARN_FROM_TUN table will have a single flow using a learn action to # dynamically set-up flows in UCAST_TO_TUN corresponding to remote mac # addresses (assumes that lvid has already been set by a previous flow) learned_flow = ("table=%s," "priority=1," "hard_timeout=300," "NXM_OF_VLAN_TCI[0..11]," "NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[]," "load:0->NXM_OF_VLAN_TCI[]," "load:NXM_NX_TUN_ID[]->NXM_NX_TUN_ID[]," "output:NXM_OF_IN_PORT[]" % constants.UCAST_TO_TUN) # Once remote mac addresses are learnt, output packet to patch_int self.tun_br.add_flow(table=constants.LEARN_FROM_TUN, priority=1, actions="learn(%s),output:%s" % (learned_flow, self.patch_int_ofport)) # Egress unicast will be handled in table UCAST_TO_TUN, where remote # mac addresses will be learned. For now, just add a default flow that # will resubmit unknown unicasts to table FLOOD_TO_TUN to treat them # as broadcasts/multicasts self.tun_br.add_flow(table=constants.UCAST_TO_TUN, priority=0, actions="resubmit(,%s)" % constants.FLOOD_TO_TUN) if self.arp_responder_enabled: # If none of the ARP entries correspond to the requested IP, the # broadcast-ed packet is resubmitted to the flooding table self.tun_br.add_flow(table=constants.ARP_RESPONDER, priority=0, actions="resubmit(,%s)" % constants.FLOOD_TO_TUN) # FLOOD_TO_TUN will handle flooding in tunnels based on lvid, # for now, add a default drop action self.tun_br.add_flow(table=constants.FLOOD_TO_TUN, priority=0, actions="drop") def get_veth_name(self, prefix, name): """Construct a veth name based on the prefix and name that does not exceed the maximum length allowed for a linux device. Longer names are hashed to help ensure uniqueness. """ if len(prefix + name) <= q_const.DEVICE_NAME_MAX_LEN: return prefix + name # We can't just truncate because bridges may be distinguished # by an ident at the end. A hash over the name should be unique. # Leave part of the bridge name on for easier identification hashlen = 6 namelen = q_const.DEVICE_NAME_MAX_LEN - len(prefix) - hashlen new_name = ('%(prefix)s%(truncated)s%(hash)s' % {'prefix': prefix, 'truncated': name[0:namelen], 'hash': hashlib.sha1(name).hexdigest()[0:hashlen]}) LOG.warning(_("Creating an interface named %(name)s exceeds the " "%(limit)d character limitation. It was shortened to " "%(new_name)s to fit."), {'name': name, 'limit': q_const.DEVICE_NAME_MAX_LEN, 'new_name': new_name}) return new_name def setup_physical_bridges(self, bridge_mappings): '''Setup the physical network bridges. Creates physical network bridges and links them to the integration bridge using veths. :param bridge_mappings: map physical network names to bridge names. ''' self.phys_brs = {} self.int_ofports = {} self.phys_ofports = {} ip_wrapper = ip_lib.IPWrapper(self.root_helper) for physical_network, bridge in bridge_mappings.iteritems(): LOG.info(_("Mapping physical network %(physical_network)s to " "bridge %(bridge)s"), {'physical_network': physical_network, 'bridge': bridge}) # setup physical bridge if not ip_lib.device_exists(bridge, self.root_helper): LOG.error(_("Bridge %(bridge)s for physical network " "%(physical_network)s does not exist. Agent " "terminated!"), {'physical_network': physical_network, 'bridge': bridge}) sys.exit(1) br = ovs_lib.OVSBridge(bridge, self.root_helper) br.remove_all_flows() br.add_flow(priority=1, actions="normal") self.phys_brs[physical_network] = br # create veth to patch physical bridge with integration bridge int_veth_name = self.get_veth_name( constants.VETH_INTEGRATION_PREFIX, bridge) self.int_br.delete_port(int_veth_name) phys_veth_name = self.get_veth_name( constants.VETH_PHYSICAL_PREFIX, bridge) br.delete_port(phys_veth_name) if ip_lib.device_exists(int_veth_name, self.root_helper): ip_lib.IPDevice(int_veth_name, self.root_helper).link.delete() # Give udev a chance to process its rules here, to avoid # race conditions between commands launched by udev rules # and the subsequent call to ip_wrapper.add_veth utils.execute(['/sbin/udevadm', 'settle', '--timeout=10']) int_veth, phys_veth = ip_wrapper.add_veth(int_veth_name, phys_veth_name) self.int_ofports[physical_network] = self.int_br.add_port(int_veth) self.phys_ofports[physical_network] = br.add_port(phys_veth) # block all untranslated traffic over veth between bridges self.int_br.add_flow(priority=2, in_port=self.int_ofports[physical_network], actions="drop") br.add_flow(priority=2, in_port=self.phys_ofports[physical_network], actions="drop") # enable veth to pass traffic int_veth.link.set_up() phys_veth.link.set_up() if self.veth_mtu: # set up mtu size for veth interfaces int_veth.link.set_mtu(self.veth_mtu) phys_veth.link.set_mtu(self.veth_mtu) def scan_ports(self, registered_ports, updated_ports=None): cur_ports = self.int_br.get_vif_port_set() self.int_br_device_count = len(cur_ports) port_info = {'current': cur_ports} if updated_ports is None: updated_ports = set() updated_ports.update(self.check_changed_vlans(registered_ports)) if updated_ports: # Some updated ports might have been removed in the # meanwhile, and therefore should not be processed. # In this case the updated port won't be found among # current ports. updated_ports &= cur_ports if updated_ports: port_info['updated'] = updated_ports # FIXME(salv-orlando): It's not really necessary to return early # if nothing has changed. if cur_ports == registered_ports: # No added or removed ports to set, just return here return port_info port_info['added'] = cur_ports - registered_ports # Remove all the known ports not found on the integration bridge port_info['removed'] = registered_ports - cur_ports return port_info def check_changed_vlans(self, registered_ports): """Return ports which have lost their vlan tag. The returned value is a set of port ids of the ports concerned by a vlan tag loss. """ port_tags = self.int_br.get_port_tag_dict() changed_ports = set() for lvm in self.local_vlan_map.values(): for port in registered_ports: if ( port in lvm.vif_ports and lvm.vif_ports[port].port_name in port_tags and port_tags[lvm.vif_ports[port].port_name] != lvm.vlan ): LOG.info( _("Port '%(port_name)s' has lost " "its vlan tag '%(vlan_tag)d'!"), {'port_name': lvm.vif_ports[port].port_name, 'vlan_tag': lvm.vlan} ) changed_ports.add(port) return changed_ports def update_ancillary_ports(self, registered_ports): ports = set() for bridge in self.ancillary_brs: ports |= bridge.get_vif_port_set() if ports == registered_ports: return added = ports - registered_ports removed = registered_ports - ports return {'current': ports, 'added': added, 'removed': removed} def treat_vif_port(self, vif_port, port_id, network_id, network_type, physical_network, segmentation_id, admin_state_up, ovs_restarted): # When this function is called for a port, the port should have # an OVS ofport configured, as only these ports were considered # for being treated. If that does not happen, it is a potential # error condition of which operators should be aware if not vif_port.ofport: LOG.warn(_("VIF port: %s has no ofport configured, and might not " "be able to transmit"), vif_port.vif_id) if vif_port: if admin_state_up: self.port_bound(vif_port, network_id, network_type, physical_network, segmentation_id, ovs_restarted) else: self.port_dead(vif_port) else: LOG.debug(_("No VIF port for port %s defined on agent."), port_id) def setup_tunnel_port(self, port_name, remote_ip, tunnel_type): ofport = self.tun_br.add_tunnel_port(port_name, remote_ip, self.local_ip, tunnel_type, self.vxlan_udp_port, self.dont_fragment) ofport_int = -1 try: ofport_int = int(ofport) except (TypeError, ValueError): LOG.exception(_("ofport should have a value that can be " "interpreted as an integer")) if ofport_int < 0: LOG.error(_("Failed to set-up %(type)s tunnel port to %(ip)s"), {'type': tunnel_type, 'ip': remote_ip}) return 0 self.tun_br_ofports[tunnel_type][remote_ip] = ofport # Add flow in default table to resubmit to the right # tunnelling table (lvid will be set in the latter) self.tun_br.add_flow(priority=1, in_port=ofport, actions="resubmit(,%s)" % constants.TUN_TABLE[tunnel_type]) ofports = ','.join(self.tun_br_ofports[tunnel_type].values()) if ofports and not self.l2_pop: # Update flooding flows to include the new tunnel for network_id, vlan_mapping in self.local_vlan_map.iteritems(): if vlan_mapping.network_type == tunnel_type: self.tun_br.mod_flow(table=constants.FLOOD_TO_TUN, dl_vlan=vlan_mapping.vlan, actions="strip_vlan," "set_tunnel:%s,output:%s" % (vlan_mapping.segmentation_id, ofports)) return ofport def cleanup_tunnel_port(self, tun_ofport, tunnel_type): # Check if this tunnel port is still used for lvm in self.local_vlan_map.values(): if tun_ofport in lvm.tun_ofports: break # If not, remove it else: for remote_ip, ofport in self.tun_br_ofports[tunnel_type].items(): if ofport == tun_ofport: port_name = '%s-%s' % (tunnel_type, self.get_ip_in_hex(remote_ip)) self.tun_br.delete_port(port_name) self.tun_br.delete_flows(in_port=ofport) self.tun_br_ofports[tunnel_type].pop(remote_ip, None) def treat_devices_added_or_updated(self, devices, ovs_restarted): resync = False for device in devices: LOG.debug(_("Processing port %s"), device) port = self.int_br.get_vif_port_by_id(device) if not port: # The port has disappeared and should not be processed # There is no need to put the port DOWN in the plugin as # it never went up in the first place LOG.info(_("Port %s was not found on the integration bridge " "and will therefore not be processed"), device) continue try: # TODO(salv-orlando): Provide bulk API for retrieving # details for all devices in one call details = self.plugin_rpc.get_device_details(self.context, device, self.agent_id) except Exception as e: LOG.debug(_("Unable to get port details for " "%(device)s: %(e)s"), {'device': device, 'e': e}) resync = True continue if 'port_id' in details: LOG.info(_("Port %(device)s updated. Details: %(details)s"), {'device': device, 'details': details}) self.treat_vif_port(port, details['port_id'], details['network_id'], details['network_type'], details['physical_network'], details['segmentation_id'], details['admin_state_up'], ovs_restarted) # update plugin about port status if details.get('admin_state_up'): LOG.debug(_("Setting status for %s to UP"), device) self.plugin_rpc.update_device_up( self.context, device, self.agent_id, cfg.CONF.host) else: LOG.debug(_("Setting status for %s to DOWN"), device) self.plugin_rpc.update_device_down( self.context, device, self.agent_id, cfg.CONF.host) LOG.info(_("Configuration for device %s completed."), device) else: LOG.warn(_("Device %s not defined on plugin"), device) if (port and port.ofport != -1): self.port_dead(port) return resync def treat_ancillary_devices_added(self, devices): resync = False for device in devices: LOG.info(_("Ancillary Port %s added"), device) try: self.plugin_rpc.get_device_details(self.context, device, self.agent_id) except Exception as e: LOG.debug(_("Unable to get port details for " "%(device)s: %(e)s"), {'device': device, 'e': e}) resync = True continue # update plugin about port status self.plugin_rpc.update_device_up(self.context, device, self.agent_id, cfg.CONF.host) return resync def treat_devices_removed(self, devices): resync = False self.sg_agent.remove_devices_filter(devices) for device in devices: LOG.info(_("Attachment %s removed"), device) try: self.plugin_rpc.update_device_down(self.context, device, self.agent_id, cfg.CONF.host) except Exception as e: LOG.debug(_("port_removed failed for %(device)s: %(e)s"), {'device': device, 'e': e}) resync = True continue self.port_unbound(device) return resync def treat_ancillary_devices_removed(self, devices): resync = False for device in devices: LOG.info(_("Attachment %s removed"), device) try: details = self.plugin_rpc.update_device_down(self.context, device, self.agent_id, cfg.CONF.host) except Exception as e: LOG.debug(_("port_removed failed for %(device)s: %(e)s"), {'device': device, 'e': e}) resync = True continue if details['exists']: LOG.info(_("Port %s updated."), device) # Nothing to do regarding local networking else: LOG.debug(_("Device %s not defined on plugin"), device) return resync def process_network_ports(self, port_info, ovs_restarted): resync_a = False resync_b = False # TODO(salv-orlando): consider a solution for ensuring notifications # are processed exactly in the same order in which they were # received. This is tricky because there are two notification # sources: the neutron server, and the ovs db monitor process # If there is an exception while processing security groups ports # will not be wired anyway, and a resync will be triggered # TODO(salv-orlando): Optimize avoiding applying filters unnecessarily # (eg: when there are no IP address changes) self.sg_agent.setup_port_filters(port_info.get('added', set()), port_info.get('updated', set())) # VIF wiring needs to be performed always for 'new' devices. # For updated ports, re-wiring is not needed in most cases, but needs # to be performed anyway when the admin state of a device is changed. # A device might be both in the 'added' and 'updated' # list at the same time; avoid processing it twice. devices_added_updated = (port_info.get('added', set()) | port_info.get('updated', set())) if devices_added_updated: start = time.time() resync_a = self.treat_devices_added_or_updated( devices_added_updated, ovs_restarted) LOG.debug(_("process_network_ports - iteration:%(iter_num)d -" "treat_devices_added_or_updated completed " "in %(elapsed).3f"), {'iter_num': self.iter_num, 'elapsed': time.time() - start}) if 'removed' in port_info: start = time.time() resync_b = self.treat_devices_removed(port_info['removed']) LOG.debug(_("process_network_ports - iteration:%(iter_num)d -" "treat_devices_removed completed in %(elapsed).3f"), {'iter_num': self.iter_num, 'elapsed': time.time() - start}) # If one of the above operations fails => resync with plugin return (resync_a | resync_b) def process_ancillary_network_ports(self, port_info): resync_a = False resync_b = False if 'added' in port_info: start = time.time() resync_a = self.treat_ancillary_devices_added(port_info['added']) LOG.debug(_("process_ancillary_network_ports - iteration: " "%(iter_num)d - treat_ancillary_devices_added " "completed in %(elapsed).3f"), {'iter_num': self.iter_num, 'elapsed': time.time() - start}) if 'removed' in port_info: start = time.time() resync_b = self.treat_ancillary_devices_removed( port_info['removed']) LOG.debug(_("process_ancillary_network_ports - iteration: " "%(iter_num)d - treat_ancillary_devices_removed " "completed in %(elapsed).3f"), {'iter_num': self.iter_num, 'elapsed': time.time() - start}) # If one of the above operations fails => resync with plugin return (resync_a | resync_b) def get_ip_in_hex(self, ip_address): try: return '%08x' % netaddr.IPAddress(ip_address, version=4) except Exception: LOG.warn(_("Unable to create tunnel port. Invalid remote IP: %s"), ip_address) return def tunnel_sync(self): resync = False try: for tunnel_type in self.tunnel_types: details = self.plugin_rpc.tunnel_sync(self.context, self.local_ip, tunnel_type) if not self.l2_pop: tunnels = details['tunnels'] for tunnel in tunnels: if self.local_ip != tunnel['ip_address']: tunnel_id = tunnel.get('id') # Unlike the OVS plugin, ML2 doesn't return an id # key. So use ip_address to form port name instead. # Port name must be <=15 chars, so use shorter hex. remote_ip = tunnel['ip_address'] remote_ip_hex = self.get_ip_in_hex(remote_ip) if not tunnel_id and not remote_ip_hex: continue tun_name = '%s-%s' % (tunnel_type, tunnel_id or remote_ip_hex) self.setup_tunnel_port(tun_name, tunnel['ip_address'], tunnel_type) except Exception as e: LOG.debug(_("Unable to sync tunnel IP %(local_ip)s: %(e)s"), {'local_ip': self.local_ip, 'e': e}) resync = True return resync def _agent_has_updates(self, polling_manager): return (polling_manager.is_polling_required or self.updated_ports or self.sg_agent.firewall_refresh_needed()) def _port_info_has_changes(self, port_info): return (port_info.get('added') or port_info.get('removed') or port_info.get('updated')) def check_ovs_restart(self): # Check for the canary flow canary_flow = self.int_br.dump_flows_for_table(constants.CANARY_TABLE) return not canary_flow def rpc_loop(self, polling_manager=None): if not polling_manager: polling_manager = polling.AlwaysPoll() sync = True ports = set() updated_ports_copy = set() ancillary_ports = set() tunnel_sync = True ovs_restarted = False while True: start = time.time() port_stats = {'regular': {'added': 0, 'updated': 0, 'removed': 0}, 'ancillary': {'added': 0, 'removed': 0}} LOG.debug(_("Agent rpc_loop - iteration:%d started"), self.iter_num) if sync: LOG.info(_("Agent out of sync with plugin!")) ports.clear() ancillary_ports.clear() sync = False polling_manager.force_polling() # Notify the plugin of tunnel IP if self.enable_tunneling and tunnel_sync: LOG.info(_("Agent tunnel out of sync with plugin!")) try: tunnel_sync = self.tunnel_sync() except Exception: LOG.exception(_("Error while synchronizing tunnels")) tunnel_sync = True ovs_restarted = self.check_ovs_restart() if ovs_restarted: self.setup_integration_br() self.setup_physical_bridges(self.bridge_mappings) if self.enable_tunneling: self.setup_tunnel_br() if self._agent_has_updates(polling_manager) or ovs_restarted: try: LOG.debug(_("Agent rpc_loop - iteration:%(iter_num)d - " "starting polling. Elapsed:%(elapsed).3f"), {'iter_num': self.iter_num, 'elapsed': time.time() - start}) # Save updated ports dict to perform rollback in # case resync would be needed, and then clear # self.updated_ports. As the greenthread should not yield # between these two statements, this will be thread-safe updated_ports_copy = self.updated_ports self.updated_ports = set() reg_ports = (set() if ovs_restarted else ports) port_info = self.scan_ports(reg_ports, updated_ports_copy) ports = port_info['current'] LOG.debug(_("Agent rpc_loop - iteration:%(iter_num)d - " "port information retrieved. " "Elapsed:%(elapsed).3f"), {'iter_num': self.iter_num, 'elapsed': time.time() - start}) # Secure and wire/unwire VIFs and update their status # on Neutron server if (self._port_info_has_changes(port_info) or self.sg_agent.firewall_refresh_needed() or ovs_restarted): LOG.debug(_("Starting to process devices in:%s"), port_info) # If treat devices fails - must resync with plugin sync = self.process_network_ports(port_info, ovs_restarted) LOG.debug(_("Agent rpc_loop - iteration:%(iter_num)d -" "ports processed. Elapsed:%(elapsed).3f"), {'iter_num': self.iter_num, 'elapsed': time.time() - start}) port_stats['regular']['added'] = ( len(port_info.get('added', []))) port_stats['regular']['updated'] = ( len(port_info.get('updated', []))) port_stats['regular']['removed'] = ( len(port_info.get('removed', []))) # Treat ancillary devices if they exist if self.ancillary_brs: port_info = self.update_ancillary_ports( ancillary_ports) LOG.debug(_("Agent rpc_loop - iteration:%(iter_num)d -" "ancillary port info retrieved. " "Elapsed:%(elapsed).3f"), {'iter_num': self.iter_num, 'elapsed': time.time() - start}) if port_info: rc = self.process_ancillary_network_ports( port_info) LOG.debug(_("Agent rpc_loop - iteration:" "%(iter_num)d - ancillary ports " "processed. Elapsed:%(elapsed).3f"), {'iter_num': self.iter_num, 'elapsed': time.time() - start}) ancillary_ports = port_info['current'] port_stats['ancillary']['added'] = ( len(port_info.get('added', []))) port_stats['ancillary']['removed'] = ( len(port_info.get('removed', []))) sync = sync | rc polling_manager.polling_completed() except Exception: LOG.exception(_("Error while processing VIF ports")) # Put the ports back in self.updated_port self.updated_ports |= updated_ports_copy sync = True # sleep till end of polling interval elapsed = (time.time() - start) LOG.debug(_("Agent rpc_loop - iteration:%(iter_num)d " "completed. Processed ports statistics: " "%(port_stats)s. Elapsed:%(elapsed).3f"), {'iter_num': self.iter_num, 'port_stats': port_stats, 'elapsed': elapsed}) if (elapsed < self.polling_interval): time.sleep(self.polling_interval - elapsed) else: LOG.debug(_("Loop iteration exceeded interval " "(%(polling_interval)s vs. %(elapsed)s)!"), {'polling_interval': self.polling_interval, 'elapsed': elapsed}) self.iter_num = self.iter_num + 1 def daemon_loop(self): with polling.get_polling_manager( self.minimize_polling, self.root_helper, self.ovsdb_monitor_respawn_interval) as pm: self.rpc_loop(polling_manager=pm) def handle_sigterm(signum, frame): sys.exit(1) def create_agent_config_map(config): """Create a map of agent config parameters. :param config: an instance of cfg.CONF :returns: a map of agent configuration parameters """ try: bridge_mappings = q_utils.parse_mappings(config.OVS.bridge_mappings) except ValueError as e: raise ValueError(_("Parsing bridge_mappings failed: %s.") % e) kwargs = dict( integ_br=config.OVS.integration_bridge, tun_br=config.OVS.tunnel_bridge, local_ip=config.OVS.local_ip, bridge_mappings=bridge_mappings, root_helper=config.AGENT.root_helper, polling_interval=config.AGENT.polling_interval, minimize_polling=config.AGENT.minimize_polling, tunnel_types=config.AGENT.tunnel_types, veth_mtu=config.AGENT.veth_mtu, l2_population=config.AGENT.l2_population, arp_responder=config.AGENT.arp_responder, ) # If enable_tunneling is TRUE, set tunnel_type to default to GRE if config.OVS.enable_tunneling and not kwargs['tunnel_types']: kwargs['tunnel_types'] = [p_const.TYPE_GRE] # Verify the tunnel_types specified are valid for tun in kwargs['tunnel_types']: if tun not in constants.TUNNEL_NETWORK_TYPES: msg = _('Invalid tunnel type specified: %s'), tun raise ValueError(msg) if not kwargs['local_ip']: msg = _('Tunneling cannot be enabled without a valid local_ip.') raise ValueError(msg) return kwargs def main(): cfg.CONF.register_opts(ip_lib.OPTS) common_config.init(sys.argv[1:]) common_config.setup_logging(cfg.CONF) q_utils.log_opt_values(LOG) try: agent_config = create_agent_config_map(cfg.CONF) except ValueError as e: LOG.error(_('%s Agent terminated!'), e) sys.exit(1) is_xen_compute_host = 'rootwrap-xen-dom0' in agent_config['root_helper'] if is_xen_compute_host: # Force ip_lib to always use the root helper to ensure that ip # commands target xen dom0 rather than domU. cfg.CONF.set_default('ip_lib_force_root', True) agent = OVSNeutronAgent(**agent_config) signal.signal(signal.SIGTERM, handle_sigterm) # Start everything. LOG.info(_("Agent initialized successfully, now running... ")) agent.daemon_loop() sys.exit(0) if __name__ == "__main__": main()