src/collecty/plugins/entropy.py

   1 #!/usr/bin/python3
   2 ###############################################################################
   3 #                                                                             #
   4 # collecty - A system statistics collection daemon for IPFire                 #
   5 # Copyright (C) 2012 IPFire development team                                  #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 import os
  23
  24 from . import base
  25
  26 from ..i18n import _
  27
  28 ENTROPY_FILE = "/proc/sys/kernel/random/entropy_avail"
  29
  30 class GraphTemplateEntropy(base.GraphTemplate):
  31         name = "entropy"
  32
  33         @property
  34         def rrd_graph(self):
  35                 _ = self.locale.translate
  36
  37                 return [
  38                         "LINE3:entropy#ff0000:%-15s" % _("Available entropy"),
  39                         "GPRINT:entropy_max:%12s\:" % _("Maximum") + " %5.0lf",
  40                         "GPRINT:entropy_min:%12s\:" % _("Minimum") + " %5.0lf",
  41                         "GPRINT:entropy_avg:%12s\:" % _("Average") + " %5.0lf\\n",
  42                 ]
  43
  44         lower_limit = 0
  45
  46         @property
  47         def graph_title(self):
  48                 _ = self.locale.translate
  49                 return _("Available entropy")
  50
  51         @property
  52         def graph_vertical_label(self):
  53                 _ = self.locale.translate
  54                 return _("Bit")
  55
  56
  57 class EntropyObject(base.Object):
  58         rrd_schema = [
  59                 "DS:entropy:GAUGE:0:U",
  60         ]
  61
  62         @property
  63         def id(self):
  64                 return "default"
  65
  66         def collect(self):
  67                 with open(ENTROPY_FILE) as f:
  68                         return f.readline().strip()
  69
  70
  71 class EntropyPlugin(base.Plugin):
  72         name = "entropy"
  73         description = "Entropy Plugin"
  74
  75         templates = [GraphTemplateEntropy]
  76
  77         @property
  78         def objects(self):
  79                 if not os.path.exists(ENTROPY_FILE):
  80                         self.log.debug(_("Entropy kernel interface does not exist"))
  81                         return []
  82
  83                 return [EntropyObject(self)]