TRex 学习 （5）---- stateful(API)

为什么80%的码农都做不了架构师？>>>   

一个好的接口可以给自动化测试带来无限的动力，如果接口不好，我们可能会调用ssh去执行bash，或者调用Pexpect库去交互，但是有好的接口，给我们的只是一个包，那就是一个好的自动化测试工具。

TRex Stateful Python API测试

1. 启动 Stateful Server
   root@trex:/tmp/trex/v2.23# ./trex_daemon_server restart TRex server daemon is killed Firing up TRex REST daemon @ port 8090 ... TRex server daemon is started
2. 进入目录
   root@trex:/tmp/trex/v2.23# cd automation/trex_control_plane/stf/examples/
3. gav.py

  1 import argparse
  2 import stf_path
  3 from trex_stf_lib.trex_client import CTRexClient
  4 from pprint import pprint
  5 
  6 # sample TRex stateful run
  7 # assuming server daemon is running.
  8 
  9 def minimal_stateful_test(server):
 10     print('Connecting to %s' % server)
 11     trex_client = CTRexClient(server)
 12 
 13     print('Connected, start TRex')
 14     trex_client.start_trex(
 15             c = 1,
 16             m = 1,
 17             f = 'cap2/http_virus.yaml',
 18             d = 30,
 19             )
 20 
 21     print('Sample until end')
 22     result = trex_client.sample_to_run_finish()
 23 
 24     print('Test results:')
 25     print(result)
 26 
 27     print('TX by ports:')
 28     tx_ptks_dict = result.get_last_value('trex-global.data', 'opackets-*')
 29     print('  |  '.join(['%s: %s' % (k.split('-')[-1], tx_ptks_dict[k]) for k in sorted(tx_ptks_d
    ict.keys())]))
 30 
 31     print('RX by ports:')
 32     rx_ptks_dict = result.get_last_value('trex-global.data', 'ipackets-*')
 33     print('  |  '.join(['%s: %s' % (k.split('-')[-1], rx_ptks_dict[k]) for k in sorted(rx_ptks_d
    ict.keys())]))
 34 
 35     print('CPU utilization:')
 36     print(result.get_value_list('trex-global.data.m_cpu_util'))
 37 
 38     #Dump of *latest* result sample, uncomment to see it all
 39     #print('Latest result dump:')
 40     #pprint(result.get_latest_dump())
 41 
 42 
 43 if __name__ == '__main__':
 44     parser = argparse.ArgumentParser(description="Example for TRex Stateful, assuming server dae
    mon is running.")
 45     parser.add_argument('-s', '--server',
 46                         dest='server',
 47                         help='Remote trex address',
 48                         default='127.0.0.1',
 49                         type = str)
 50     args = parser.parse_args()
 51 
 52     minimal_stateful_test(args.server)

4. result

root@trex:/tmp/trex/v2.23/automation/trex_control_plane/stf/examples# python gav.py 
Connecting to 127.0.0.1
Connected, start TRex
Sample until end
Test results:
Is valid history?       True
Done warmup?            True
Expected tx rate:       {u'm_tx_expected_pps': 2800.0, u'm_tx_expected_bps': 14577600.0, u'm_tx_expected_cps': 100.0}
Current tx rate:        {u'm_tx_bps': 5102998.5, u'm_tx_cps': 31.6, u'm_tx_pps': 978.1}
Minimum latency:        None
Maximum latency:        None
Average latency:        None
Average window latency: None
Total drops:            44986
Drop rate:              3328075.8
History size so far:    34
TX by ports:
0: 38987  |  1: 44985
RX by ports:
0: 23991  |  1: 14995
CPU utilization:
[0.0, 0.06825, 1.015, 1.059, 0.8428, 0.7444, 0.6778, 0.5246, 0.7297, 0.705, 0.546, 0.4228, 0.6708, 0.5279, 0.5601, 0.4331, 0.3598, 0.4806, 0.412, 0.369, 0.3962, 0.3549, 0.2902, 0.2594, 0.2125, 0.4259, 0.3509, 0.2767, 0.2138, 0.3293, 0.4195, 0.4195, 0.4195, 0.4195]

5. 在结果中可以显示发包，收包速率，以及CPU的利用率，当然还可以知道其它的一些关键字，因此适合在自动化中运用

参考

` http://trex-tgn.cisco.com/trex/doc/trex_manual.html

转载于:https://my.oschina.net/hding/blog/891928