¡@
OpenStack Study: ovs_neutron_agent.py**** CubicPower OpenStack Study ****
# 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 signal import sys import time import eventlet import netaddr from oslo.config import cfg from six.moves import xrange 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 logging_config from neutron.common import constants as q_const from neutron.common import legacy 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.openstack.common.rpc import dispatcher 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).
**** CubicPower OpenStack Study **** class LocalVLANMapping:
**** CubicPower OpenStack Study **** 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()
**** CubicPower OpenStack Study **** 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))
**** CubicPower OpenStack Study **** class Port(object): """Represents a neutron port. Class stores port data in a ORM-free way, so attributres are still available even if a row has been deleted. """
**** CubicPower OpenStack Study **** def __init__(self, p): self.id = p.id self.network_id = p.network_id self.device_id = p.device_id self.admin_state_up = p.admin_state_up self.status = p.status
**** CubicPower OpenStack Study **** def __eq__(self, other): '''Compare only fields that will cause us to re-wire.''' try: return (self and other and self.id == other.id and self.admin_state_up == other.admin_state_up) except Exception: return False
**** CubicPower OpenStack Study **** def __ne__(self, other): return not self.__eq__(other)
**** CubicPower OpenStack Study **** def __hash__(self): return hash(self.id)
**** CubicPower OpenStack Study **** class OVSPluginApi(agent_rpc.PluginApi,
sg_rpc.SecurityGroupServerRpcApiMixin): pass
**** CubicPower OpenStack Study **** class OVSSecurityGroupAgent(sg_rpc.SecurityGroupAgentRpcMixin):
**** CubicPower OpenStack Study **** 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)
**** CubicPower OpenStack Study **** class OVSNeutronAgent(sg_rpc.SecurityGroupAgentRpcCallbackMixin,
l2population_rpc.L2populationRpcCallBackMixin): '''Implements OVS-based tunneling, VLANs and flat networks. Two local bridges are created: an integration bridge (
**** CubicPower OpenStack Study **** 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)): '''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 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. ''' self.veth_mtu = veth_mtu self.root_helper = root_helper self.available_local_vlans = set(xrange(q_const.MIN_VLAN_TAG, q_const.MAX_VLAN_TAG)) self.tunnel_types = tunnel_types or [] self.l2_pop = l2_population 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}, '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.setup_rpc() self.setup_integration_br() self.setup_physical_bridges(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._check_ovs_version() 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 supprot self.sg_agent = OVSSecurityGroupAgent(self.context, self.plugin_rpc, root_helper) # Stores port update notifications for processing in main rpc loop self.updated_ports = set() # Initialize iteration counter self.iter_num = 0
**** CubicPower OpenStack Study **** def _check_ovs_version(self): if p_const.TYPE_VXLAN in self.tunnel_types: try: ovs_lib.check_ovs_vxlan_version(self.root_helper) except SystemError: LOG.exception(_("Agent terminated")) raise SystemExit(1)
**** CubicPower OpenStack Study **** 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!"))
**** CubicPower OpenStack Study **** def setup_rpc(self): mac = self.int_br.get_local_port_mac() self.agent_id = '%s%s' % ('ovs', (mac.replace(":", ""))) 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.dispatcher = self.create_rpc_dispatcher() # 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.dispatcher, self.topic, consumers) report_interval = cfg.CONF.AGENT.report_interval if report_interval: heartbeat = loopingcall.FixedIntervalLoopingCall( self._report_state) heartbeat.start(interval=report_interval)
**** CubicPower OpenStack Study **** 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
**** CubicPower OpenStack Study **** 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)
**** CubicPower OpenStack Study **** 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'])
**** CubicPower OpenStack Study **** 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)
**** CubicPower OpenStack Study **** 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, agent_ip, lvm, ofport) self.tun_br.defer_apply_off()
**** CubicPower OpenStack Study **** 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, agent_ip, lvm, ofport) self.tun_br.defer_apply_off()
**** CubicPower OpenStack Study **** def _add_fdb_flow(self, port_info, agent_ip, 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: # TODO(feleouet): add ARP responder entry 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))
**** CubicPower OpenStack Study **** def _del_fdb_flow(self, port_info, agent_ip, 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 tunelling 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: #TODO(feleouet): remove ARP responder entry self.tun_br.delete_flows(table=constants.UCAST_TO_TUN, dl_vlan=lvm.vlan, dl_dst=port_info[0])
**** CubicPower OpenStack Study **** 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)
**** CubicPower OpenStack Study **** def create_rpc_dispatcher(self): '''Get the rpc dispatcher for this manager. If a manager would like to set an rpc API version, or support more than one class as the target of rpc messages, override this method. ''' return dispatcher.RpcDispatcher([self])
**** CubicPower OpenStack Study **** 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' ''' 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() LOG.info(_("Assigning %(vlan_id)s as local vlan for " "net-id=%(net_uuid)s"), {'vlan_id': lvid, 'net_uuid': net_uuid}) self.local_vlan_map[net_uuid] = LocalVLANMapping(lvid, network_type, physical_network, segmentation_id) 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})
**** CubicPower OpenStack Study **** 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)
**** CubicPower OpenStack Study **** def port_bound(self, port, net_uuid, network_type, physical_network, segmentation_id): '''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' ''' if net_uuid not in self.local_vlan_map: 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)
**** CubicPower OpenStack Study **** 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)
**** CubicPower OpenStack Study **** 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")
**** CubicPower OpenStack Study **** 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")
**** CubicPower OpenStack Study **** 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
**** CubicPower OpenStack Study **** def setup_tunnel_br(self, tun_br): '''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. ''' 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") # PATCH_LV_TO_TUN table will handle packets coming from patch_int # unicasts go to table UCAST_TO_TUN where remote adresses are learnt self.tun_br.add_flow(table=constants.PATCH_LV_TO_TUN, 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, 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 adresses 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 # adresses (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 adresses are learnt, packet is outputed 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 adresses 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) # 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")
**** CubicPower OpenStack Study **** 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 = constants.VETH_INTEGRATION_PREFIX + bridge self.int_br.delete_port(int_veth_name) phys_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)
**** CubicPower OpenStack Study **** 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
**** CubicPower OpenStack Study **** 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
**** CubicPower OpenStack Study **** 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}
**** CubicPower OpenStack Study **** def treat_vif_port(self, vif_port, port_id, network_id, network_type, physical_network, segmentation_id, admin_state_up): # 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) else: self.port_dead(vif_port) else: LOG.debug(_("No VIF port for port %s defined on agent."), port_id)
**** CubicPower OpenStack Study **** 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) 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 # tunelling 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
**** CubicPower OpenStack Study **** 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_ofports[tunnel_type].pop(remote_ip, None)
**** CubicPower OpenStack Study **** def treat_devices_added_or_updated(self, devices): 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']) # 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
**** CubicPower OpenStack Study **** 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
**** CubicPower OpenStack Study **** 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
**** CubicPower OpenStack Study **** 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
**** CubicPower OpenStack Study **** def process_network_ports(self, port_info): 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) 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 opertaions fails => resync with plugin return (resync_a | resync_b)
**** CubicPower OpenStack Study **** 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 opertaions fails => resync with plugin return (resync_a | resync_b)
**** CubicPower OpenStack Study **** 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
**** CubicPower OpenStack Study **** 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
**** CubicPower OpenStack Study **** def _agent_has_updates(self, polling_manager): return (polling_manager.is_polling_required or self.updated_ports or self.sg_agent.firewall_refresh_needed())
**** CubicPower OpenStack Study **** def _port_info_has_changes(self, port_info): return (port_info.get('added') or port_info.get('removed') or port_info.get('updated'))
**** CubicPower OpenStack Study **** 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 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 if self._agent_has_updates(polling_manager): 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() port_info = self.scan_ports(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()): 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) 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
**** CubicPower OpenStack Study **** 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, ) # 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 specificed: %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(): eventlet.monkey_patch() cfg.CONF.register_opts(ip_lib.OPTS) cfg.CONF(project='neutron') logging_config.setup_logging(cfg.CONF) q_utils.log_opt_values(LOG) legacy.modernize_quantum_config(cfg.CONF) 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()
**** CubicPower OpenStack Study **** def handle_sigterm(signum, frame): sys.exit(1)
**** CubicPower OpenStack Study **** 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, ) # 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 specificed: %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
**** CubicPower OpenStack Study **** def main(): eventlet.monkey_patch() cfg.CONF.register_opts(ip_lib.OPTS) cfg.CONF(project='neutron') logging_config.setup_logging(cfg.CONF) q_utils.log_opt_values(LOG) legacy.modernize_quantum_config(cfg.CONF) 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()
|