1 # Copyright 2016 Cisco Systems, Inc. All rights reserved.
3 # Licensed under the Apache License, Version 2.0 (the "License"); you may
4 # not use this file except in compliance with the License. You may obtain
5 # a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 # License for the specific language governing permissions and limitations
22 class TrafficServerException(Exception):
25 class TrafficServer(object):
26 """Base class for traffic servers."""
28 class TRexTrafficServer(TrafficServer):
29 """Creates configuration file for TRex and runs server."""
31 def __init__(self, trex_base_dir='/opt/trex'):
32 contents = os.listdir(trex_base_dir)
33 # only one version of TRex should be supported in container
34 assert len(contents) == 1
35 self.trex_dir = os.path.join(trex_base_dir, contents[0])
37 def __apply_trex_patches(self):
38 parent_dir = os.path.dirname(os.path.realpath(__file__))
39 patches_dir = os.path.join(parent_dir, "trex_patches")
40 patches = os.listdir(patches_dir)
42 patch = os.path.join(patches_dir, patch)
44 "patch --directory=" + self.trex_dir + " --strip=0"
45 " --forward --no-backup-if-mismatch --reject-file=-"
46 " --force --input=" + patch + " >&-")
49 def run_server(self, generator_config, filename='/etc/trex_cfg.yaml'):
50 """Run TRex server for specified traffic profile.
52 :param traffic_profile: traffic profile object based on config file
53 :param filename: path where to save TRex config file
55 # in order to allow for customized behaviors, let's apply some patches
56 # this scheme keeps acceptable since we have only simple modifications
57 self.__apply_trex_patches()
58 cfg = self.__save_config(generator_config, filename)
59 cores = generator_config.cores
60 vtep_vlan = generator_config.gen_config.get('vtep_vlan')
61 sw_mode = "--software" if generator_config.software_mode else ""
62 vlan_opt = "--vlan" if (generator_config.vlan_tagging or vtep_vlan) else ""
63 if generator_config.mbuf_factor:
64 mbuf_opt = "--mbuf-factor " + str(generator_config.mbuf_factor)
67 hdrh_opt = "--hdrh" if generator_config.hdrh else ""
68 # --unbind-unused-ports: for NIC that have more than 2 ports such as Intel X710
69 # this will instruct trex to unbind all ports that are unused instead of
70 # erroring out with an exception (i40e only)
71 # Try: --ignore-528-issue -> neither unbind nor exit with error,
72 # just proceed cause it might work!
73 # Note that force unbinding is probably a bad choice:
74 # we can't assume for sure that other ports are "unused".
75 # The default TRex behaviour - exit - is indeed a safer option;
76 # a message informs about the ports that should be unbound.
77 i40e_opt = ("--ignore-528-issue" if
78 generator_config.config.i40e_mixed == 'ignore' else
79 "--unbind-unused-ports" if
80 generator_config.config.i40e_mixed == 'unbind' else "")
81 cmd = ['nohup', '/bin/bash', '-c',
82 './t-rex-64 -i -c {} --iom 0 --no-scapy-server '
83 '--close-at-end {} {} {} '
84 '{} {} --cfg {} &> /tmp/trex.log & disown'.format(cores, sw_mode,
89 LOG.info(' '.join(cmd))
90 subprocess.Popen(cmd, cwd=self.trex_dir)
91 LOG.info('TRex server is running...')
93 def __load_config(self, filename):
95 if os.path.exists(filename):
96 with open(filename, 'r') as stream:
98 result = yaml.safe_load(stream)
99 except yaml.YAMLError as exc:
103 def __save_config(self, generator_config, filename):
104 result = self.__prepare_config(generator_config)
105 yaml.safe_load(result)
106 if os.path.exists(filename):
108 with open(filename, 'w') as f:
112 def __prepare_config(self, generator_config):
113 ifs = ",".join([repr(pci) for pci in generator_config.pcis])
115 # For consistency and stability reasons, the T-Rex server
116 # should be forciby restarted each time the value of a
117 # parameter, specified as one of the starting command line
118 # arguments, has been modified since the last launch.
119 # Hence we add some extra fields to the config file
120 # (nb_cores, use_vlan, mbuf_factor, i40e_mixed, hdrh)
121 # which will serve as a memory between runs -
122 # while being actually ignored by the T-Rex server.
124 result = """# Config generated by NFVbench
127 zmq_pub_port : {zmq_pub_port}
128 zmq_rpc_port : {zmq_rpc_port}
130 limit_memory : {limit_memory}
133 mbuf_factor: {mbuf_factor}
135 nb_cores : {nb_cores}
136 use_vlan : {use_vlan}
137 i40e_mixed : {i40e_mixed}
138 interfaces : [{ifs}]""".format(
139 zmq_pub_port=generator_config.zmq_pub_port,
140 zmq_rpc_port=generator_config.zmq_rpc_port,
141 prefix=generator_config.name,
142 limit_memory=generator_config.limit_memory,
143 sw_mode=generator_config.software_mode,
144 mbuf_factor=generator_config.mbuf_factor,
145 hdrh=generator_config.hdrh,
146 nb_cores=generator_config.cores,
147 use_vlan=generator_config.gen_config.get('vtep_vlan') or
148 generator_config.vlan_tagging,
149 i40e_mixed=generator_config.config.i40e_mixed,
152 if hasattr(generator_config, 'mbuf_64') and generator_config.mbuf_64:
155 mbuf_64 : {mbuf_64}""".format(mbuf_64=generator_config.mbuf_64)
157 if self.__check_platform_config(generator_config):
161 master_thread_id : {master_thread_id}
162 latency_thread_id : {latency_thread_id}
163 dual_if:""".format(master_thread_id=generator_config.gen_config.platform.
165 latency_thread_id=generator_config.gen_config.platform.
169 for core in generator_config.gen_config.platform.dual_if:
172 threads = ",".join([repr(thread) for thread in core.threads])
174 LOG.warning("No threads defined for socket %s", core.socket)
177 threads : [{threads}]""".format(socket=core.socket, threads=threads)
178 result += core_result
179 except (KeyError, AttributeError):
183 def __check_platform_config(self, generator_config):
184 return hasattr(generator_config.gen_config, 'platform') \
185 and hasattr(generator_config.gen_config.platform, "master_thread_id") \
186 and generator_config.gen_config.platform.master_thread_id is not None \
187 and hasattr(generator_config.gen_config.platform, "latency_thread_id") \
188 and generator_config.gen_config.platform.latency_thread_id is not None
190 def check_config_updated(self, generator_config):
191 existing_config = self.__load_config(filename='/etc/trex_cfg.yaml')
192 new_config = yaml.safe_load(self.__prepare_config(generator_config))
193 LOG.debug("Existing config: %s", existing_config)
194 LOG.debug("New config: %s", new_config)
195 if existing_config == new_config: