yardstick/benchmark/scenarios/availability/monitor.py

   1 ##############################################################################
   2 # Copyright (c) 2015 Huawei Technologies Co.,Ltd. and others
   3 #
   4 # All rights reserved. This program and the accompanying materials
   5 # are made available under the terms of the Apache License, Version 2.0
   6 # which accompanies this distribution, and is available at
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 ##############################################################################
   9 import logging
  10 import multiprocessing
  11 import subprocess
  12 import traceback
  13 import time
  14
  15 LOG = logging.getLogger(__name__)
  16
  17
  18 def _execute_shell_command(command):
  19     '''execute shell script with error handling'''
  20     exitcode = 0
  21     output = []
  22     try:
  23         output = subprocess.check_output(command, shell=True)
  24     except Exception:
  25         exitcode = -1
  26         output = traceback.format_exc()
  27         LOG.error("exec command '%s' error:\n " % command)
  28         LOG.error(traceback.format_exc())
  29
  30     return exitcode, output
  31
  32
  33 def _monitor_process(config, queue, event):
  34
  35     total_time = 0
  36     outage_time = 0
  37     total_count = 0
  38     outage_count = 0
  39     first_outage = 0
  40     last_outage = 0
  41
  42     wait_time = config.get("duration", 0)
  43     cmd = config.get("monitor_cmd", None)
  44     if cmd is None:
  45         LOG.error("There are no monitor cmd!")
  46         return
  47
  48     queue.put("started")
  49
  50     begin_time = time.time()
  51     while True:
  52
  53         total_count = total_count + 1
  54
  55         one_check_begin_time = time.time()
  56         exit_status, stdout = _execute_shell_command(cmd)
  57         one_check_end_time = time.time()
  58
  59         LOG.info("the exit_status:%s stdout:%s" % (exit_status, stdout))
  60         if exit_status:
  61             outage_count = outage_count + 1
  62
  63             outage_time = outage_time + (
  64                 one_check_end_time - one_check_begin_time)
  65
  66             if not first_outage:
  67                 first_outage = one_check_begin_time
  68
  69             last_outage = one_check_end_time
  70
  71         if event.is_set():
  72             LOG.debug("the monitor process stop")
  73             break
  74
  75         if wait_time > 0:
  76             time.sleep(wait_time)
  77
  78     end_time = time.time()
  79     total_time = end_time - begin_time
  80
  81     queue.put({"total_time": total_time,
  82                "outage_time": last_outage-first_outage,
  83                "total_count": total_count,
  84                "outage_count": outage_count})
  85
  86
  87 class Monitor:
  88
  89     def __init__(self):
  90         self._result = []
  91         self._monitor_process = []
  92
  93     def setup(self, config):
  94         self._config = config
  95
  96     def start(self):
  97         self._queue = multiprocessing.Queue()
  98         self._event = multiprocessing.Event()
  99         self._monitor_process = multiprocessing.Process(
 100             target=_monitor_process, name="Monitor",
 101             args=(self._config, self._queue, self._event))
 102
 103         self._monitor_process.start()
 104         ret = self._queue.get()
 105         if ret == "started":
 106             LOG.debug("monitor process started!")
 107
 108     def stop(self):
 109         self._event.set()
 110         self._result = self._queue.get()
 111         LOG.debug("stop the monitor process. the result:%s" % self._result)
 112
 113     def get_result(self):
 114         return self._result