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                         "DEF:entropy=%(file)s:entropy:AVERAGE",
  39
  40                         "LINE3:entropy#ff0000:%-15s" % _("Available entropy"),
  41                         "VDEF:entrmin=entropy,MINIMUM",
  42                         "VDEF:entrmax=entropy,MAXIMUM",
  43                         "VDEF:entravg=entropy,AVERAGE",
  44                         "GPRINT:entrmax:%12s\:" % _("Maximum") + " %5.0lf",
  45                         "GPRINT:entrmin:%12s\:" % _("Minimum") + " %5.0lf",
  46                         "GPRINT:entravg:%12s\:" % _("Average") + " %5.0lf\\n",
  47                 ]
  48
  49         lower_limit = 0
  50
  51         @property
  52         def graph_title(self):
  53                 _ = self.locale.translate
  54                 return _("Available entropy")
  55
  56         @property
  57         def graph_vertical_label(self):
  58                 _ = self.locale.translate
  59                 return _("Bit")
  60
  61
  62 class EntropyObject(base.Object):
  63         rrd_schema = [
  64                 "DS:entropy:GAUGE:0:U",
  65         ]
  66
  67         @property
  68         def id(self):
  69                 return "default"
  70
  71         def collect(self):
  72                 with open(ENTROPY_FILE) as f:
  73                         return f.readline().strip()
  74
  75
  76 class EntropyPlugin(base.Plugin):
  77         name = "entropy"
  78         description = "Entropy Plugin"
  79
  80         templates = [GraphTemplateEntropy]
  81
  82         @property
  83         def objects(self):
  84                 if not os.path.exists(ENTROPY_FILE):
  85                         self.log.debug(_("Entropy kernel interface does not exist"))
  86                         return []
  87
  88                 return [EntropyObject(self)]