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 ..colours import *
  25
  26 class GraphTemplateMemory(base.GraphTemplate):
  27         name = "memory"
  28
  29         upper_limit = 100
  30         lower_limit = 0
  31
  32         @property
  33         def rrd_graph(self):
  34                 _ = self.locale.translate
  35
  36                 return [
  37                         "AREA:used%s:%-15s" % (lighten(MEMORY_USED, AREA_OPACITY), _("Used memory")),
  38                         "GPRINT:used_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  39                         "GPRINT:used_min:%12s\:" % _("Minimum") + " %6.2lf",
  40                         "GPRINT:used_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  41
  42                         "STACK:buffered%s:%-15s" % (lighten(MEMORY_BUFFERED, AREA_OPACITY), _("Buffered data")),
  43                         "GPRINT:buffered_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  44                         "GPRINT:buffered_min:%12s\:" % _("Minimum") + " %6.2lf",
  45                         "GPRINT:buffered_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  46
  47                         "STACK:cached%s:%-15s" % (lighten(MEMORY_CACHED, AREA_OPACITY), _("Cached data")),
  48                         "GPRINT:cached_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  49                         "GPRINT:cached_min:%12s\:" % _("Minimum") + " %6.2lf",
  50                         "GPRINT:cached_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  51
  52 #                       "STACK:free#7799ff:%-15s" % _("Free memory"),
  53 #                       "GPRINT:free_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  54 #                       "GPRINT:free_min:%12s\:" % _("Minimum") + " %6.2lf",
  55 #                       "GPRINT:free_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  56
  57                         "LINE3:swap%s:%-15s" % (MEMORY_SWAP, _("Used Swap space")),
  58                         "GPRINT:swap_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  59                         "GPRINT:swap_min:%12s\:" % _("Minimum") + " %6.2lf",
  60                         "GPRINT:swap_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  61
  62                         # Draw the outlines of the areas
  63                         "LINE1:used%s" % MEMORY_USED,
  64                         "LINE1:buffered%s::STACK" % MEMORY_BUFFERED,
  65                         "LINE1:cached%s::STACK" % MEMORY_CACHED,
  66                 ]
  67
  68         @property
  69         def graph_title(self):
  70                 _ = self.locale.translate
  71                 return _("Memory Usage")
  72
  73         @property
  74         def graph_vertical_label(self):
  75                 _ = self.locale.translate
  76                 return _("Percent")
  77
  78
  79 class MemoryObject(base.Object):
  80         rrd_schema = [
  81                 "DS:used:GAUGE:0:100",
  82                 "DS:cached:GAUGE:0:100",
  83                 "DS:buffered:GAUGE:0:100",
  84                 "DS:free:GAUGE:0:100",
  85                 "DS:swap:GAUGE:0:100",
  86         ]
  87
  88         @property
  89         def id(self):
  90                 return "default"
  91
  92         def collect(self):
  93                 with open("/proc/meminfo") as f:
  94                         for line in f:
  95                                 if line.startswith("MemTotal:"):
  96                                         total = float(line.split()[1])
  97                                 if line.startswith("MemFree:"):
  98                                         free = float(line.split()[1])
  99                                 elif line.startswith("Buffers:"):
 100                                         buffered = float(line.split()[1])
 101                                 elif line.startswith("Cached:"):
 102                                         cached = float(line.split()[1])
 103                                 elif line.startswith("SwapTotal:"):
 104                                         swapt = float(line.split()[1])
 105                                 elif line.startswith("SwapFree:"):
 106                                         swapf = float(line.split()[1])
 107
 108                         ret = [
 109                                 "%s" % ((total - (free + buffered + cached)) * 100 / total),
 110                                 "%s" % (cached * 100 / total),
 111                                 "%s" % (buffered * 100 / total),
 112                                 "%s" % (free * 100 / total),
 113                         ]
 114
 115                         if swapt:
 116                                 ret.append("%s" % ((swapt - swapf) * 100 / swapt))
 117                         else:
 118                                 ret.append("0")
 119
 120                         return ret
 121
 122
 123 class MemoryPlugin(base.Plugin):
 124         name = "memory"
 125         description = "Memory Usage Plugin"
 126
 127         templates = [GraphTemplateMemory]
 128
 129         @property
 130         def objects(self):
 131                 yield MemoryObject(self)