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
|
#!/usr/bin/env python
# Copyright 2016 Cisco Systems, 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.
#
"""This module takes care of coordinating a benchmark run between various modules.
The ChainRunner class is in charge of coordinating:
- the chain manager which takes care of staging resources
- traffic generator client which drives the traffic generator
- the stats manager which collects and aggregates stats
"""
from collections import OrderedDict
from .chaining import ChainManager
from .log import LOG
from .specs import ChainType
from .stats_manager import StatsManager
from .traffic_client import TrafficClient
class ChainRunner(object):
"""Run selected chain, collect results and analyse them."""
def __init__(self, config, cred, specs, factory, notifier=None):
"""Create a new instance of chain runner.
Create dependent components
A new instance is created everytime the nfvbench config may have changed.
config: the new nfvbench config to use for this run
cred: openstack credentials (or None if no openstack)
specs: TBD
factory:
notifier:
"""
self.config = config
self.cred = cred
self.specs = specs
self.factory = factory
self.notifier = notifier
self.chain_name = self.config.service_chain
# get an instance of traffic client
self.traffic_client = TrafficClient(config, notifier)
if self.config.no_traffic:
LOG.info('Dry run: traffic generation is disabled')
else:
# Start the traffic generator server
self.traffic_client.start_traffic_generator()
# get an instance of a chain manager
self.chain_manager = ChainManager(self)
# at this point all resources are setup/discovered
# we need to program the traffic dest MAC and VLANs
gen_config = self.traffic_client.generator_config
if config.vlan_tagging:
# VLAN is discovered from the networks
gen_config.set_vlans(0, self.chain_manager.get_chain_vlans(0))
gen_config.set_vlans(1, self.chain_manager.get_chain_vlans(1))
else:
LOG.info("Ports: untagged")
# the only case we do not need to set the dest MAC is in the case of
# l2-loopback (because the traffic gen will default to use the peer MAC)
# or EXT+ARP+VLAN (because dest MAC will be discovered by TRex ARP)
# Note that in the case of EXT+ARP+VxLAN, the dest MACs need to be loaded
# because ARP only operates on the dest VTEP IP not on the VM dest MAC
if not config.l2_loopback and \
(config.service_chain != ChainType.EXT or config.no_arp or config.vxlan):
gen_config.set_dest_macs(0, self.chain_manager.get_dest_macs(0))
gen_config.set_dest_macs(1, self.chain_manager.get_dest_macs(1))
if config.vxlan:
# VXLAN is discovered from the networks
vtep_vlan = gen_config.gen_config.vtep_vlan
src_vteps = gen_config.gen_config.src_vteps
dst_vtep = gen_config.gen_config.dst_vtep
gen_config.set_vxlans(0, self.chain_manager.get_chain_vxlans(0))
gen_config.set_vxlans(1, self.chain_manager.get_chain_vxlans(1))
gen_config.set_vtep_vlan(0, vtep_vlan)
gen_config.set_vtep_vlan(1, vtep_vlan)
# Configuring source an remote VTEPs on TREx interfaces
gen_config.set_vxlan_endpoints(0, src_vteps[0], dst_vtep)
gen_config.set_vxlan_endpoints(1, src_vteps[1], dst_vtep)
self.config['vxlan_gen_config'] = gen_config
if config.mpls:
# MPLS VPN is discovered from the networks
src_vteps = gen_config.gen_config.src_vteps
vtep_gateway_ips = gen_config.gen_config.vtep_gateway_ips
gen_config.set_mpls_inner_labels(0, self.chain_manager.get_chain_mpls_inner_labels(0))
gen_config.set_mpls_inner_labels(1, self.chain_manager.get_chain_mpls_inner_labels(1))
outer_mpls_labels_left = self.config.internal_networks.left.mpls_transport_labels
outer_mpls_labels_right = self.config.internal_networks.right.mpls_transport_labels
if outer_mpls_labels_left or outer_mpls_labels_right:
gen_config.set_mpls_outer_labels(0, outer_mpls_labels_left)
gen_config.set_mpls_outer_labels(1, outer_mpls_labels_right)
# Configuring source an remote VTEPs on TREx interfaces
gen_config.set_mpls_peers(0, src_vteps[0], vtep_gateway_ips[0])
gen_config.set_mpls_peers(1, src_vteps[1], vtep_gateway_ips[1])
self.config['mpls_gen_config'] = gen_config
# get an instance of the stats manager
self.stats_manager = StatsManager(self)
LOG.info('ChainRunner initialized')
def __setup_traffic(self):
# possibly skip connectivity check
if self.config.no_e2e_check:
LOG.info('Skipping end to end connectivity check')
return
self.traffic_client.setup()
if not self.config.no_traffic:
# ARP is needed for EXT chain or VxLAN overlay or MPLS unless disabled explicitly
if (self.config.service_chain == ChainType.EXT or self.config.mpls or
self.config.vxlan or self.config.l3_router or self.config.loop_vm_arp)\
and not self.config.no_arp:
self.traffic_client.ensure_arp_successful()
self.traffic_client.ensure_end_to_end()
def __get_result_per_frame_size(self, frame_size, bidirectional):
traffic_result = {
frame_size: {}
}
result = {}
if not self.config.no_traffic:
self.traffic_client.set_traffic(frame_size, bidirectional)
if self.config.single_run:
result = self.stats_manager.run_fixed_rate()
else:
results = self.traffic_client.get_ndr_and_pdr()
for dr in ['pdr', 'ndr']:
if dr in results:
traffic_result[frame_size][dr] = results[dr]
if 'warning' in results[dr]['stats'] and results[dr]['stats']['warning']:
traffic_result['warning'] = results[dr]['stats']['warning']
traffic_result[frame_size]['iteration_stats'] = results['iteration_stats']
if self.config.single_run:
result['run_config'] = self.traffic_client.get_run_config(result)
required = result['run_config']['direction-total']['orig']['rate_pps']
actual = result['stats']['total_tx_rate']
warning = self.traffic_client.compare_tx_rates(required, actual)
if warning is not None:
result['run_config']['warning'] = warning
traffic_result[frame_size].update(result)
return traffic_result
def __get_chain_result(self):
result = OrderedDict()
for fs in self.config.frame_sizes:
result.update(self.__get_result_per_frame_size(fs,
self.config.traffic.bidirectional))
chain_result = {
'flow_count': self.config.flow_count,
'service_chain_count': self.config.service_chain_count,
'bidirectional': self.config.traffic.bidirectional,
'profile': self.config.traffic.profile,
'compute_nodes': self.stats_manager.get_compute_nodes_bios(),
'result': result
}
return chain_result
def run(self):
"""Run the requested benchmark.
return: the results of the benchmark as a dict
"""
results = {}
if self.config.no_traffic:
return results
LOG.info('Starting %dx%s benchmark...', self.config.service_chain_count, self.chain_name)
self.stats_manager.create_worker()
if self.config.vxlan or self.config.mpls:
# Configure vxlan or mpls tunnels
self.stats_manager.worker.config_interfaces()
self.__setup_traffic()
results[self.chain_name] = {'result': self.__get_chain_result()}
LOG.info("Service chain '%s' run completed.", self.chain_name)
return results
def close(self):
"""Close this instance of chain runner and delete resources if applicable."""
try:
if not self.config.no_cleanup:
LOG.info('Cleaning up...')
if self.chain_manager:
self.chain_manager.delete()
else:
LOG.info('Clean up skipped.')
try:
self.traffic_client.close()
except Exception:
LOG.exception()
if self.stats_manager:
self.stats_manager.close()
except Exception:
LOG.exception('Cleanup not finished')
def get_version(self):
"""Retrieve the version of dependent components."""
versions = {}
if self.traffic_client:
versions['Traffic_Generator'] = self.traffic_client.get_version()
versions.update(self.stats_manager.get_version())
return versions
|