cmk_base/agent_simulator.py

   1 #!/usr/bin/env python
   2 # -*- encoding: utf-8; py-indent-offset: 4 -*-
   3 # +------------------------------------------------------------------+
   4 # |             ____ _               _        __  __ _  __           |
   5 # |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
   6 # |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
   7 # |           | |___| | | |  __/ (__|   <    | |  | | . \            |
   8 # |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
   9 # |                                                                  |
  10 # | Copyright Mathias Kettner 2014             mk@mathias-kettner.de |
  11 # +------------------------------------------------------------------+
  12 #
  13 # This file is part of Check_MK.
  14 # The official homepage is at http://mathias-kettner.de/check_mk.
  15 #
  16 # check_mk is free software;  you can redistribute it and/or modify it
  17 # under the  terms of the  GNU General Public License  as published by
  18 # the Free Software Foundation in version 2.  check_mk is  distributed
  19 # in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
  20 # out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
  21 # PARTICULAR PURPOSE. See the  GNU General Public License for more de-
  22 # tails. You should have  received  a copy of the  GNU  General Public
  23 # License along with GNU Make; see the file  COPYING.  If  not,  write
  24 # to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
  25 # Boston, MA 02110-1301 USA.
  26
  27 import math
  28
  29 import cmk.utils.debug
  30
  31
  32 def our_uptime():
  33     return float((file("/proc/uptime").read().split()[0]))
  34
  35
  36 # replace simulator tags in output
  37 def process(output):
  38     try:
  39         while True:
  40             i = output.find('%{')
  41             if i == -1:
  42                 break
  43             e = output.find('}', i)
  44             if e == -1:
  45                 break
  46             simfunc = output[i + 2:e]
  47             replacement = str(eval("agentsim_" + simfunc))  # nosec
  48             output = output[:i] + replacement + output[e + 1:]
  49     except Exception as e:
  50         if cmk.utils.debug.enabled():
  51             raise
  52
  53     return output
  54
  55
  56 def agentsim_uptime(rate=1.0, period=None):  # period = sinus wave
  57     if period is None:
  58         return int(our_uptime() * rate)
  59
  60     a = (rate * period) / (2.0 * math.pi)
  61     u = our_uptime()
  62     return int(u * rate + int(a * math.sin(u * 2.0 * math.pi / period)))
  63
  64
  65 def agentsim_enum(values, period=1):  # period is in seconds
  66     hit = int(our_uptime()) / period % len(values)
  67     return values[hit]
  68
  69
  70 def agentsim_sinus(base=50, amplitude=50, period=300):
  71     return int(math.sin(our_uptime() * 2.0 * math.pi / period) * amplitude + base)