src/collecty/plugins/memory.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 from . import base
  23
  24 from ..i18n import _
  25 from .. import util
  26 from ..colours import *
  27
  28 class GraphTemplateMemory(base.GraphTemplate):
  29         name = "memory"
  30
  31         upper_limit = 100
  32         lower_limit = 0
  33
  34         @property
  35         def rrd_graph(self):
  36                 _ = self.locale.translate
  37
  38                 return [
  39                         "AREA:used%s:%-15s" % (util.lighten(MEMORY_USED, AREA_OPACITY), _("Used memory")),
  40                         "GPRINT:used_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  41                         "GPRINT:used_min:%12s\:" % _("Minimum") + " %6.2lf",
  42                         "GPRINT:used_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  43
  44                         "STACK:buffered%s:%-15s" % (util.lighten(MEMORY_BUFFERED, AREA_OPACITY), _("Buffered data")),
  45                         "GPRINT:buffered_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  46                         "GPRINT:buffered_min:%12s\:" % _("Minimum") + " %6.2lf",
  47                         "GPRINT:buffered_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  48
  49                         "STACK:cached%s:%-15s" % (util.lighten(MEMORY_CACHED, AREA_OPACITY), _("Cached data")),
  50                         "GPRINT:cached_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  51                         "GPRINT:cached_min:%12s\:" % _("Minimum") + " %6.2lf",
  52                         "GPRINT:cached_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  53
  54 #                       "STACK:free#7799ff:%-15s" % _("Free memory"),
  55 #                       "GPRINT:free_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  56 #                       "GPRINT:free_min:%12s\:" % _("Minimum") + " %6.2lf",
  57 #                       "GPRINT:free_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  58
  59                         "LINE3:swap%s:%-15s" % (MEMORY_SWAP, _("Used Swap space")),
  60                         "GPRINT:swap_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  61                         "GPRINT:swap_min:%12s\:" % _("Minimum") + " %6.2lf",
  62                         "GPRINT:swap_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  63
  64                         # Draw the outlines of the areas
  65                         "LINE1:used%s" % MEMORY_USED,
  66                         "LINE1:buffered%s::STACK" % MEMORY_BUFFERED,
  67                         "LINE1:cached%s::STACK" % MEMORY_CACHED,
  68                 ]
  69
  70         @property
  71         def graph_title(self):
  72                 _ = self.locale.translate
  73                 return _("Memory Usage")
  74
  75         @property
  76         def graph_vertical_label(self):
  77                 _ = self.locale.translate
  78                 return _("Percent")
  79
  80
  81 class MemoryObject(base.Object):
  82         rrd_schema = [
  83                 "DS:used:GAUGE:0:100",
  84                 "DS:cached:GAUGE:0:100",
  85                 "DS:buffered:GAUGE:0:100",
  86                 "DS:free:GAUGE:0:100",
  87                 "DS:swap:GAUGE:0:100",
  88         ]
  89
  90         @property
  91         def id(self):
  92                 return "default"
  93
  94         def collect(self):
  95                 f = None
  96
  97                 try:
  98                         f = open("/proc/meminfo")
  99                         for line in f.readlines():
 100                                 if line.startswith("MemTotal:"):
 101                                         total = float(line.split()[1])
 102                                 if line.startswith("MemFree:"):
 103                                         free = float(line.split()[1])
 104                                 elif line.startswith("Buffers:"):
 105                                         buffered = float(line.split()[1])
 106                                 elif line.startswith("Cached:"):
 107                                         cached = float(line.split()[1])
 108                                 elif line.startswith("SwapTotal:"):
 109                                         swapt = float(line.split()[1])
 110                                 elif line.startswith("SwapFree:"):
 111                                         swapf = float(line.split()[1])
 112
 113                         ret = [
 114                                 "%s" % ((total - (free + buffered + cached)) * 100 / total),
 115                                 "%s" % (cached * 100 / total),
 116                                 "%s" % (buffered * 100 / total),
 117                                 "%s" % (free * 100 / total),
 118                         ]
 119
 120                         if swapt:
 121                                 ret.append("%s" % ((swapt - swapf) * 100 / swapt))
 122                         else:
 123                                 ret.append("0")
 124
 125                         return ret
 126                 finally:
 127                         if f:
 128                                 f.close()
 129
 130
 131 class MemoryPlugin(base.Plugin):
 132         name = "memory"
 133         description = "Memory Usage Plugin"
 134
 135         templates = [GraphTemplateMemory]
 136
 137         @property
 138         def objects(self):
 139                 yield MemoryObject(self)