-
Notifications
You must be signed in to change notification settings - Fork 1.5k
/
ovs_neutron_agent.py
1952 lines (1758 loc) · 87.9 KB
/
ovs_neutron_agent.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
# 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 collections
import hashlib
import signal
import sys
import time
import uuid
import functools
import netaddr
from oslo_config import cfg
from oslo_log import log as logging
import oslo_messaging
from oslo_service import loopingcall
from oslo_service import systemd
import six
from six import moves
from neutron.agent.common import ovs_lib
from neutron.agent.common import polling
from neutron.agent.common import utils
from neutron.agent.l2.extensions import manager as ext_manager
from neutron.agent.linux import ip_lib
from neutron.agent import rpc as agent_rpc
from neutron.agent import securitygroups_rpc as sg_rpc
from neutron.api.rpc.handlers import dvr_rpc
from neutron.common import config
from neutron.common import constants as n_const
from neutron.common import exceptions
from neutron.common import ipv6_utils as ipv6
from neutron.common import topics
from neutron.common import utils as n_utils
from neutron import context
from neutron.i18n import _LE, _LI, _LW
from neutron.plugins.common import constants as p_const
from neutron.plugins.ml2.drivers.l2pop.rpc_manager import l2population_rpc
from neutron.plugins.ml2.drivers.openvswitch.agent.common \
import constants
from neutron.plugins.ml2.drivers.openvswitch.agent \
import ovs_dvr_neutron_agent
LOG = logging.getLogger(__name__)
cfg.CONF.import_group('AGENT', 'neutron.plugins.ml2.drivers.openvswitch.'
'agent.common.config')
cfg.CONF.import_group('OVS', 'neutron.plugins.ml2.drivers.openvswitch.agent.'
'common.config')
# A placeholder for dead vlans.
DEAD_VLAN_TAG = p_const.MAX_VLAN_TAG + 1
UINT64_BITMASK = (1 << 64) - 1
class _mac_mydialect(netaddr.mac_unix):
word_fmt = '%.2x'
class DeviceListRetrievalError(exceptions.NeutronException):
message = _("Unable to retrieve port details for devices: %(devices)s ")
class LocalVLANMapping(object):
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):
pass
def has_zero_prefixlen_address(ip_addresses):
return any(netaddr.IPNetwork(ip).prefixlen == 0 for ip in ip_addresses)
class OVSNeutronAgent(sg_rpc.SecurityGroupAgentRpcCallbackMixin,
l2population_rpc.L2populationRpcCallBackTunnelMixin,
dvr_rpc.DVRAgentRpcCallbackMixin):
'''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 or a pair of patch ports 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
# 1.2 Support DVR (Distributed Virtual Router) RPC
# 1.3 Added param devices_to_update to security_groups_provider_updated
# 1.4 Added support for network_update
target = oslo_messaging.Target(version='1.4')
def __init__(self, bridge_classes, integ_br, tun_br, local_ip,
bridge_mappings, polling_interval, tunnel_types=None,
veth_mtu=None, l2_population=False,
enable_distributed_routing=False,
minimize_polling=False,
ovsdb_monitor_respawn_interval=(
constants.DEFAULT_OVSDBMON_RESPAWN),
arp_responder=False,
prevent_arp_spoofing=True,
use_veth_interconnection=False,
quitting_rpc_timeout=None,
conf=None):
'''Constructor.
:param bridge_classes: a dict for bridge classes.
: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 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.
:param prevent_arp_spoofing: Optional, enable suppression of any ARP
responses from ports that don't match an IP address that belongs
to the ports. Spoofing rules will not be added to ports that
have port security disabled.
:param use_veth_interconnection: use veths instead of patch ports to
interconnect the integration bridge to physical bridges.
:param quitting_rpc_timeout: timeout in seconds for rpc calls after
SIGTERM is received
:param conf: an instance of ConfigOpts
'''
super(OVSNeutronAgent, self).__init__()
self.conf = conf or cfg.CONF
self.fullsync = True
# init bridge classes with configured datapath type.
self.br_int_cls, self.br_phys_cls, self.br_tun_cls = (
functools.partial(bridge_classes[b],
datapath_type=self.conf.OVS.datapath_type)
for b in ('br_int', 'br_phys', 'br_tun'))
self.use_veth_interconnection = use_veth_interconnection
self.veth_mtu = veth_mtu
self.available_local_vlans = set(moves.range(p_const.MIN_VLAN_TAG,
p_const.MAX_VLAN_TAG))
self.tunnel_types = tunnel_types or []
self.l2_pop = l2_population
# TODO(ethuleau): Change ARP responder so it's not dependent on the
# ML2 l2 population mechanism driver.
self.enable_distributed_routing = enable_distributed_routing
self.arp_responder_enabled = arp_responder and self.l2_pop
self.prevent_arp_spoofing = prevent_arp_spoofing
if tunnel_types:
self.enable_tunneling = True
else:
self.enable_tunneling = False
# Validate agent configurations
self._check_agent_configurations()
# Keep track of int_br's device count for use by _report_state()
self.int_br_device_count = 0
self.agent_uuid_stamp = uuid.uuid4().int & UINT64_BITMASK
self.int_br = self.br_int_cls(integ_br)
self.setup_integration_br()
# Stores port update notifications for processing in main rpc loop
self.updated_ports = set()
# Stores port delete notifications
self.deleted_ports = set()
self.network_ports = collections.defaultdict(set)
# keeps association between ports and ofports to detect ofport change
self.vifname_to_ofport_map = {}
self.setup_rpc()
self.init_extension_manager(self.connection)
self.bridge_mappings = bridge_mappings
self.setup_physical_bridges(self.bridge_mappings)
self.local_vlan_map = {}
self._reset_tunnel_ofports()
self.polling_interval = polling_interval
self.minimize_polling = minimize_polling
self.ovsdb_monitor_respawn_interval = ovsdb_monitor_respawn_interval
self.local_ip = local_ip
self.tunnel_count = 0
self.vxlan_udp_port = self.conf.AGENT.vxlan_udp_port
self.dont_fragment = self.conf.AGENT.dont_fragment
self.tunnel_csum = cfg.CONF.AGENT.tunnel_csum
self.tun_br = None
self.patch_int_ofport = constants.OFPORT_INVALID
self.patch_tun_ofport = constants.OFPORT_INVALID
if self.enable_tunneling:
# The patch_int_ofport and patch_tun_ofport are updated
# here inside the call to setup_tunnel_br()
self.setup_tunnel_br(tun_br)
self.dvr_agent = ovs_dvr_neutron_agent.OVSDVRNeutronAgent(
self.context,
self.dvr_plugin_rpc,
self.int_br,
self.tun_br,
self.bridge_mappings,
self.phys_brs,
self.int_ofports,
self.phys_ofports,
self.patch_int_ofport,
self.patch_tun_ofport,
self.conf.host,
self.enable_tunneling,
self.enable_distributed_routing)
self.agent_state = {
'binary': 'neutron-openvswitch-agent',
'host': self.conf.host,
'topic': n_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,
'enable_distributed_routing':
self.enable_distributed_routing,
'log_agent_heartbeats':
self.conf.AGENT.log_agent_heartbeats,
'extensions': self.ext_manager.names()},
'agent_type': self.conf.AGENT.agent_type,
'start_flag': True}
report_interval = self.conf.AGENT.report_interval
if report_interval:
heartbeat = loopingcall.FixedIntervalLoopingCall(
self._report_state)
heartbeat.start(interval=report_interval)
if self.enable_tunneling:
self.setup_tunnel_br_flows()
self.dvr_agent.setup_dvr_flows()
# Collect additional bridges to monitor
self.ancillary_brs = self.setup_ancillary_bridges(integ_br, tun_br)
# In order to keep existed device's local vlan unchanged,
# restore local vlan mapping at start
self._restore_local_vlan_map()
# Security group agent support
self.sg_agent = sg_rpc.SecurityGroupAgentRpc(self.context,
self.sg_plugin_rpc, self.local_vlan_map,
defer_refresh_firewall=True)
# Initialize iteration counter
self.iter_num = 0
self.run_daemon_loop = True
self.catch_sigterm = False
self.catch_sighup = False
# The initialization is complete; we can start receiving messages
self.connection.consume_in_threads()
self.quitting_rpc_timeout = quitting_rpc_timeout
def _report_state(self):
# How many devices are likely used by a VM
self.agent_state.get('configurations')['devices'] = (
self.int_br_device_count)
self.agent_state.get('configurations')['in_distributed_mode'] = (
self.dvr_agent.in_distributed_mode())
try:
agent_status = self.state_rpc.report_state(self.context,
self.agent_state,
True)
if agent_status == n_const.AGENT_REVIVED:
LOG.info(_LI('Agent has just been revived. '
'Doing a full sync.'))
self.fullsync = True
self.use_call = False
if self.agent_state.pop('start_flag', None):
# On initial start, we notify systemd after initialization
# is complete.
systemd.notify_once()
except Exception:
LOG.exception(_LE("Failed reporting state!"))
def _restore_local_vlan_map(self):
self._local_vlan_hints = {}
cur_ports = self.int_br.get_vif_ports()
port_names = [p.port_name for p in cur_ports]
port_info = self.int_br.get_ports_attributes(
"Port", columns=["name", "other_config", "tag"], ports=port_names)
by_name = {x['name']: x for x in port_info}
for port in cur_ports:
# if a port was deleted between get_vif_ports and
# get_ports_attributes, we
# will get a KeyError
try:
local_vlan_map = by_name[port.port_name]['other_config']
local_vlan = by_name[port.port_name]['tag']
except KeyError:
continue
if not local_vlan:
continue
net_uuid = local_vlan_map.get('net_uuid')
if (net_uuid and net_uuid not in self._local_vlan_hints
and local_vlan != DEAD_VLAN_TAG):
self.available_local_vlans.remove(local_vlan)
self._local_vlan_hints[local_vlan_map['net_uuid']] = \
local_vlan
def _dispose_local_vlan_hints(self):
self.available_local_vlans.update(self._local_vlan_hints.values())
self._local_vlan_hints = {}
def _reset_tunnel_ofports(self):
self.tun_br_ofports = {p_const.TYPE_GENEVE: {},
p_const.TYPE_GRE: {},
p_const.TYPE_VXLAN: {}}
def setup_rpc(self):
self.agent_id = 'ovs-agent-%s' % self.conf.host
self.topic = topics.AGENT
self.plugin_rpc = OVSPluginApi(topics.PLUGIN)
self.sg_plugin_rpc = sg_rpc.SecurityGroupServerRpcApi(topics.PLUGIN)
self.dvr_plugin_rpc = dvr_rpc.DVRServerRpcApi(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.PORT, topics.DELETE],
[constants.TUNNEL, topics.UPDATE],
[constants.TUNNEL, topics.DELETE],
[topics.SECURITY_GROUP, topics.UPDATE],
[topics.DVR, topics.UPDATE],
[topics.NETWORK, topics.UPDATE]]
if self.l2_pop:
consumers.append([topics.L2POPULATION, topics.UPDATE])
self.connection = agent_rpc.create_consumers(self.endpoints,
self.topic,
consumers,
start_listening=False)
def init_extension_manager(self, connection):
ext_manager.register_opts(self.conf)
self.ext_manager = (
ext_manager.AgentExtensionsManager(self.conf))
self.ext_manager.initialize(
connection, constants.EXTENSION_DRIVER_TYPE)
def get_net_uuid(self, vif_id):
for network_id, vlan_mapping in six.iteritems(self.local_vlan_map):
if vif_id in vlan_mapping.vif_ports:
return 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 port_delete(self, context, **kwargs):
port_id = kwargs.get('port_id')
self.deleted_ports.add(port_id)
self.updated_ports.discard(port_id)
LOG.debug("port_delete message processed for port %s", port_id)
def network_update(self, context, **kwargs):
network_id = kwargs['network']['id']
for port_id in self.network_ports[network_id]:
# notifications could arrive out of order, if the port is deleted
# we don't want to update it anymore
if port_id not in self.deleted_ports:
self.updated_ports.add(port_id)
LOG.debug("network_update message processed for network "
"%(network_id)s, with ports: %(ports)s",
{'network_id': network_id,
'ports': self.network_ports[network_id]})
def _clean_network_ports(self, port_id):
for port_set in self.network_ports.values():
if port_id in port_set:
port_set.remove(port_id)
break
def process_deleted_ports(self, port_info):
# don't try to process removed ports as deleted ports since
# they are already gone
if 'removed' in port_info:
self.deleted_ports -= port_info['removed']
deleted_ports = list(self.deleted_ports)
while self.deleted_ports:
port_id = self.deleted_ports.pop()
port = self.int_br.get_vif_port_by_id(port_id)
self._clean_network_ports(port_id)
self.ext_manager.delete_port(self.context,
{"vif_port": port,
"port_id": port_id})
# move to dead VLAN so deleted ports no
# longer have access to the network
if port:
# don't log errors since there is a chance someone will be
# removing the port from the bridge at the same time
self.port_dead(port, log_errors=False)
self.port_unbound(port_id)
# Flush firewall rules after ports are put on dead VLAN to be
# more secure
self.sg_agent.remove_devices_filter(deleted_ports)
def tunnel_update(self, context, **kwargs):
LOG.debug("tunnel_update received")
if not self.enable_tunneling:
return
tunnel_ip = kwargs.get('tunnel_ip')
tunnel_ip_hex = self.get_ip_in_hex(tunnel_ip)
if not tunnel_ip_hex:
return
tunnel_type = kwargs.get('tunnel_type')
if not tunnel_type:
LOG.error(_LE("No tunnel_type specified, cannot create tunnels"))
return
if tunnel_type not in self.tunnel_types:
LOG.error(_LE("tunnel_type %s not supported by agent"),
tunnel_type)
return
if tunnel_ip == self.local_ip:
return
tun_name = '%s-%s' % (tunnel_type, tunnel_ip_hex)
if not self.l2_pop:
self._setup_tunnel_port(self.tun_br, tun_name, tunnel_ip,
tunnel_type)
def tunnel_delete(self, context, **kwargs):
LOG.debug("tunnel_delete received")
if not self.enable_tunneling:
return
tunnel_ip = kwargs.get('tunnel_ip')
if not tunnel_ip:
LOG.error(_LE("No tunnel_ip specified, cannot delete tunnels"))
return
tunnel_type = kwargs.get('tunnel_type')
if not tunnel_type:
LOG.error(_LE("No tunnel_type specified, cannot delete tunnels"))
return
if tunnel_type not in self.tunnel_types:
LOG.error(_LE("tunnel_type %s not supported by agent"),
tunnel_type)
return
ofport = self.tun_br_ofports[tunnel_type].get(tunnel_ip)
self.cleanup_tunnel_port(self.tun_br, ofport, tunnel_type)
def _tunnel_port_lookup(self, network_type, remote_ip):
return self.tun_br_ofports[network_type].get(remote_ip)
def fdb_add(self, context, fdb_entries):
LOG.debug("fdb_add received")
for lvm, agent_ports in self.get_agent_ports(fdb_entries,
self.local_vlan_map):
agent_ports.pop(self.local_ip, None)
if len(agent_ports):
if not self.enable_distributed_routing:
with self.tun_br.deferred() as deferred_br:
self.fdb_add_tun(context, deferred_br, lvm,
agent_ports, self._tunnel_port_lookup)
else:
self.fdb_add_tun(context, self.tun_br, lvm,
agent_ports, self._tunnel_port_lookup)
def fdb_remove(self, context, fdb_entries):
LOG.debug("fdb_remove received")
for lvm, agent_ports in self.get_agent_ports(fdb_entries,
self.local_vlan_map):
agent_ports.pop(self.local_ip, None)
if len(agent_ports):
if not self.enable_distributed_routing:
with self.tun_br.deferred() as deferred_br:
self.fdb_remove_tun(context, deferred_br, lvm,
agent_ports,
self._tunnel_port_lookup)
else:
self.fdb_remove_tun(context, self.tun_br, lvm,
agent_ports, self._tunnel_port_lookup)
def add_fdb_flow(self, br, port_info, remote_ip, lvm, ofport):
if port_info == n_const.FLOODING_ENTRY:
lvm.tun_ofports.add(ofport)
br.install_flood_to_tun(lvm.vlan, lvm.segmentation_id,
lvm.tun_ofports)
else:
self.setup_entry_for_arp_reply(br, 'add', lvm.vlan,
port_info.mac_address,
port_info.ip_address)
br.install_unicast_to_tun(lvm.vlan,
lvm.segmentation_id,
ofport,
port_info.mac_address)
def del_fdb_flow(self, br, port_info, remote_ip, lvm, ofport):
if port_info == n_const.FLOODING_ENTRY:
if ofport not in lvm.tun_ofports:
LOG.debug("attempt to remove a non-existent port %s", ofport)
return
lvm.tun_ofports.remove(ofport)
if len(lvm.tun_ofports) > 0:
br.install_flood_to_tun(lvm.vlan, lvm.segmentation_id,
lvm.tun_ofports)
else:
# This local vlan doesn't require any more tunnelling
br.delete_flood_to_tun(lvm.vlan)
else:
self.setup_entry_for_arp_reply(br, 'remove', lvm.vlan,
port_info.mac_address,
port_info.ip_address)
br.delete_unicast_to_tun(lvm.vlan, port_info.mac_address)
def _fdb_chg_ip(self, context, fdb_entries):
LOG.debug("update chg_ip received")
with self.tun_br.deferred() as deferred_br:
self.fdb_chg_ip_tun(context, deferred_br, fdb_entries,
self.local_ip, self.local_vlan_map)
def setup_entry_for_arp_reply(self, br, action, local_vid, mac_address,
ip_address):
'''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.
'''
if not self.arp_responder_enabled:
return
ip = netaddr.IPAddress(ip_address)
if ip.version == 6:
return
ip = str(ip)
mac = str(netaddr.EUI(mac_address, dialect=_mac_mydialect))
if action == 'add':
br.install_arp_responder(local_vid, ip, mac)
elif action == 'remove':
br.delete_arp_responder(local_vid, ip)
else:
LOG.warning(_LW('Action %s not supported'), action)
def _local_vlan_for_flat(self, lvid, physical_network):
phys_br = self.phys_brs[physical_network]
phys_port = self.phys_ofports[physical_network]
int_br = self.int_br
int_port = self.int_ofports[physical_network]
phys_br.provision_local_vlan(port=phys_port, lvid=lvid,
segmentation_id=None,
distributed=False)
int_br.provision_local_vlan(port=int_port, lvid=lvid,
segmentation_id=None)
def _local_vlan_for_vlan(self, lvid, physical_network, segmentation_id):
distributed = self.enable_distributed_routing
phys_br = self.phys_brs[physical_network]
phys_port = self.phys_ofports[physical_network]
int_br = self.int_br
int_port = self.int_ofports[physical_network]
phys_br.provision_local_vlan(port=phys_port, lvid=lvid,
segmentation_id=segmentation_id,
distributed=distributed)
int_br.provision_local_vlan(port=int_port, lvid=lvid,
segmentation_id=segmentation_id)
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', 'geneve')
: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:
lvid = self._local_vlan_hints.pop(net_uuid, None)
if lvid is None:
if not self.available_local_vlans:
LOG.error(_LE("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(_LI("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 = list(self.tun_br_ofports[network_type].values())
if ofports:
self.tun_br.install_flood_to_tun(lvid,
segmentation_id,
ofports)
# inbound from tunnels: set lvid in the right table
# and resubmit to Table LEARN_FROM_TUN for mac learning
if self.enable_distributed_routing:
self.dvr_agent.process_tunneled_network(
network_type, lvid, segmentation_id)
else:
self.tun_br.provision_local_vlan(
network_type=network_type, lvid=lvid,
segmentation_id=segmentation_id)
else:
LOG.error(_LE("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:
self._local_vlan_for_flat(lvid, physical_network)
else:
LOG.error(_LE("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:
self._local_vlan_for_vlan(lvid, physical_network,
segmentation_id)
else:
LOG.error(_LE("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(_LE("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.
'''
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(_LI("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.reclaim_local_vlan(
network_type=lvm.network_type,
segmentation_id=lvm.segmentation_id)
self.tun_br.delete_flood_to_tun(lvm.vlan)
self.tun_br.delete_unicast_to_tun(lvm.vlan, None)
self.tun_br.delete_arp_responder(lvm.vlan, None)
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(self.tun_br, 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.reclaim_local_vlan(
port=self.phys_ofports[lvm.physical_network],
lvid=lvm.vlan)
# inbound
br = self.int_br
br.reclaim_local_vlan(
port=self.int_ofports[lvm.physical_network],
segmentation_id=None)
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.reclaim_local_vlan(
port=self.phys_ofports[lvm.physical_network],
lvid=lvm.vlan)
# inbound
br = self.int_br
br.reclaim_local_vlan(
port=self.int_ofports[lvm.physical_network],
segmentation_id=lvm.segmentation_id)
elif lvm.network_type == p_const.TYPE_LOCAL:
# no flows needed for local networks
pass
else:
LOG.error(_LE("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, fixed_ips, device_owner,
ovs_restarted):
'''Bind port to net_uuid/lsw_id and install flow for inbound traffic
to vm.
:param port: a ovs_lib.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 fixed_ips: the ip addresses assigned to this port
:param device_owner: the string indicative of owner of this port
: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
self.dvr_agent.bind_port_to_dvr(port, lvm,
fixed_ips,
device_owner)
port_other_config = self.int_br.db_get_val("Port", port.port_name,
"other_config")
if port_other_config is None:
if port.vif_id in self.deleted_ports:
LOG.debug("Port %s deleted concurrently", port.vif_id)
elif port.vif_id in self.updated_ports:
LOG.error(_LE("Expected port %s not found"), port.vif_id)
else:
LOG.debug("Unable to get config for port %s", port.vif_id)
return
vlan_mapping = {'net_uuid': net_uuid,
'network_type': network_type,
'physical_network': physical_network}
if segmentation_id is not None:
vlan_mapping['segmentation_id'] = segmentation_id
port_other_config.update(vlan_mapping)
self.int_br.set_db_attribute("Port", port.port_name, "other_config",
port_other_config)
def _bind_devices(self, need_binding_ports):
devices_up = []
devices_down = []
port_names = [p['vif_port'].port_name for p in need_binding_ports]
port_info = self.int_br.get_ports_attributes(
"Port", columns=["name", "tag"], ports=port_names, if_exists=True)
tags_by_name = {x['name']: x['tag'] for x in port_info}
for port_detail in need_binding_ports:
lvm = self.local_vlan_map.get(port_detail['network_id'])
if not lvm:
# network for port was deleted. skip this port since it
# will need to be handled as a DEAD port in the next scan
continue
port = port_detail['vif_port']
device = port_detail['device']
# Do not bind a port if it's already bound
cur_tag = tags_by_name.get(port.port_name)
if cur_tag is None:
LOG.info(_LI("Port %s was deleted concurrently, skipping it"),
port.port_name)
continue
if cur_tag != lvm.vlan:
self.int_br.delete_flows(in_port=port.ofport)
if self.prevent_arp_spoofing:
self.setup_arp_spoofing_protection(self.int_br,
port, port_detail)
if cur_tag != lvm.vlan:
self.int_br.set_db_attribute(
"Port", port.port_name, "tag", lvm.vlan)
# update plugin about port status
# FIXME(salv-orlando): Failures while updating device status
# must be handled appropriately. Otherwise this might prevent
# neutron server from sending network-vif-* events to the nova
# API server, thus possibly preventing instance spawn.
if port_detail.get('admin_state_up'):
LOG.debug("Setting status for %s to UP", device)
devices_up.append(device)
else:
LOG.debug("Setting status for %s to DOWN", device)
devices_down.append(device)
failed_devices = []
if devices_up or devices_down:
devices_set = self.plugin_rpc.update_device_list(
self.context, devices_up, devices_down, self.agent_id,
self.conf.host)
failed_devices = (devices_set.get('failed_devices_up') +
devices_set.get('failed_devices_down'))
if failed_devices:
LOG.error(_LE("Configuration for devices %s failed!"),
failed_devices)
#TODO(rossella_s) handle better the resync in next patches,
# this is just to preserve the current behavior
raise DeviceListRetrievalError(devices=failed_devices)
LOG.info(_LI("Configuration for devices up %(up)s and devices "
"down %(down)s completed."),
{'up': devices_up, 'down': devices_down})
@staticmethod
def setup_arp_spoofing_protection(bridge, vif, port_details):
if not port_details.get('port_security_enabled', True):
LOG.info(_LI("Skipping ARP spoofing rules for port '%s' because "
"it has port security disabled"), vif.port_name)
bridge.delete_arp_spoofing_protection(port=vif.ofport)
return
if port_details['device_owner'].startswith('network:'):
LOG.debug("Skipping ARP spoofing rules for network owned port "
"'%s'.", vif.port_name)
bridge.delete_arp_spoofing_protection(port=vif.ofport)
return
# clear any previous flows related to this port in our ARP table
bridge.delete_arp_spoofing_allow_rules(port=vif.ofport)
# collect all of the addresses and cidrs that belong to the port
addresses = {f['ip_address'] for f in port_details['fixed_ips']}
mac_addresses = {vif.vif_mac}
if port_details.get('allowed_address_pairs'):
addresses |= {p['ip_address']
for p in port_details['allowed_address_pairs']}
mac_addresses |= {p['mac_address']
for p in port_details['allowed_address_pairs']
if p.get('mac_address')}
ipv6_addresses = {ip for ip in addresses
if netaddr.IPNetwork(ip).version == 6}
# Allow neighbor advertisements for LLA address.
ipv6_addresses |= {str(ipv6.get_ipv6_addr_by_EUI64(
n_const.IPV6_LLA_PREFIX, mac))
for mac in mac_addresses}
if not has_zero_prefixlen_address(ipv6_addresses):
# Install protection only when prefix is not zero because a /0
# prefix allows any address anyway and the nd_target can only
# match on /1 or more.
bridge.install_icmpv6_na_spoofing_protection(port=vif.ofport,
ip_addresses=ipv6_addresses)
ipv4_addresses = {ip for ip in addresses
if netaddr.IPNetwork(ip).version == 4}
if not has_zero_prefixlen_address(ipv4_addresses):
# Install protection only when prefix is not zero because a /0
# prefix allows any address anyway and the ARP_SPA can only
# match on /1 or more.
bridge.install_arp_spoofing_protection(port=vif.ofport,
ip_addresses=ipv4_addresses)
else:
bridge.delete_arp_spoofing_protection(port=vif.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(_LI('port_unbound(): net_uuid %s not in local_vlan_map'),
net_uuid)
return
lvm = self.local_vlan_map[net_uuid]
if vif_id in lvm.vif_ports:
vif_port = lvm.vif_ports[vif_id]
self.dvr_agent.unbind_port_from_dvr(vif_port, lvm)
lvm.vif_ports.pop(vif_id, None)
if not lvm.vif_ports:
self.reclaim_local_vlan(net_uuid)
def port_dead(self, port, log_errors=True):
'''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",
log_errors=log_errors)
if cur_tag and cur_tag != DEAD_VLAN_TAG:
self.int_br.set_db_attribute("Port", port.port_name, "tag",
DEAD_VLAN_TAG, log_errors=log_errors)
self.int_br.drop_port(in_port=port.ofport)
def setup_integration_br(self):
'''Setup the integration bridge.
'''
self.int_br.set_agent_uuid_stamp(self.agent_uuid_stamp)
# Ensure the integration bridge is created.
# ovs_lib.OVSBridge.create() will run
# ovs-vsctl -- --may-exist add-br BRIDGE_NAME
# which does nothing if bridge already exists.
self.int_br.create()
self.int_br.set_secure_mode()
self.int_br.setup_controllers(self.conf)
if self.conf.AGENT.drop_flows_on_start:
# Delete the patch port between br-int and br-tun if we're deleting
# the flows on br-int, so that traffic doesn't get flooded over
# while flows are missing.
self.int_br.delete_port(self.conf.OVS.int_peer_patch_port)
self.int_br.delete_flows()
self.int_br.setup_default_table()
def setup_ancillary_bridges(self, integ_br, tun_br):
'''Setup ancillary bridges - for example br-ex.'''
ovs = ovs_lib.BaseOVS()
ovs_bridges = set(ovs.get_bridges())
# 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