src/collecty/plugins/entropy.py

   1 #!/usr/bin/python
   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 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         rrd_graph = [
  34                 "DEF:entropy=%(file)s:entropy:AVERAGE",
  35                 "CDEF:entropytrend=entropy,43200,TREND",
  36
  37                 "LINE3:entropy#ff0000:%-15s" % _("Available entropy"),
  38                 "VDEF:entrmin=entropy,MINIMUM",
  39                 "VDEF:entrmax=entropy,MAXIMUM",
  40                 "VDEF:entravg=entropy,AVERAGE",
  41                 "GPRINT:entrmax:%12s\:" % _("Maximum") + " %5.0lf",
  42                 "GPRINT:entrmin:%12s\:" % _("Minimum") + " %5.0lf",
  43                 "GPRINT:entravg:%12s\:" % _("Average") + " %5.0lf\\n",
  44
  45                 "LINE3:entropytrend#000000",
  46         ]
  47
  48         rrd_graph_args = [
  49                 "--title", _("Available entropy"),
  50                 "--vertical-label", _("Bits"),
  51
  52                 "--lower-limit", "0", "--rigid",
  53         ]
  54
  55
  56 class EntropyPlugin(base.Plugin):
  57         name = "entropy"
  58         description = "Entropy Data Source"
  59
  60         templates = [GraphTemplateEntropy,]
  61
  62         rrd_schema = [
  63                 "DS:entropy:GAUGE:0:U",
  64         ]
  65
  66         @classmethod
  67         def autocreate(cls, collecty, **kwargs):
  68                 if not os.path.exists(ENTROPY_FILE):
  69                         self.log.debug(_("Entropy kernel interface does not exist."))
  70                         return
  71
  72                 return cls(collecty, **kwargs)
  73
  74         def read(self):
  75                 f = None
  76
  77                 try:
  78                         f = open(ENTROPY_FILE)
  79                         entropy = f.readline()
  80
  81                         return entropy.strip()
  82                 finally:
  83                         if f:
  84                                 f.close()