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 ..colours import *
  27 from ..i18n import _
  28
  29 ENTROPY_FILE = "/proc/sys/kernel/random/entropy_avail"
  30
  31 class GraphTemplateEntropy(base.GraphTemplate):
  32         name = "entropy"
  33
  34         @property
  35         def rrd_graph(self):
  36                 _ = self.locale.translate
  37
  38                 return [
  39                         "LINE2:entropy%s:%-15s" % (PRIMARY, _("Available entropy")),
  40                         "GPRINT:entropy_max:%12s\:" % _("Maximum") + " %5.0lf",
  41                         "GPRINT:entropy_min:%12s\:" % _("Minimum") + " %5.0lf",
  42                         "GPRINT:entropy_avg:%12s\:" % _("Average") + " %5.0lf\\n",
  43                 ]
  44
  45         lower_limit = 0
  46
  47         @property
  48         def graph_title(self):
  49                 _ = self.locale.translate
  50                 return _("Available entropy")
  51
  52         @property
  53         def graph_vertical_label(self):
  54                 _ = self.locale.translate
  55                 return _("Bit")
  56
  57
  58 class EntropyObject(base.Object):
  59         rrd_schema = [
  60                 "DS:entropy:GAUGE:0:U",
  61         ]
  62
  63         @property
  64         def id(self):
  65                 return "default"
  66
  67         def collect(self):
  68                 with open(ENTROPY_FILE) as f:
  69                         return f.readline().strip()
  70
  71
  72 class EntropyPlugin(base.Plugin):
  73         name = "entropy"
  74         description = "Entropy Plugin"
  75
  76         templates = [GraphTemplateEntropy]
  77
  78         @property
  79         def objects(self):
  80                 if not os.path.exists(ENTROPY_FILE):
  81                         self.log.debug(_("Entropy kernel interface does not exist"))
  82                         return []
  83
  84                 return [EntropyObject(self)]