src/collecty/plugins/memory.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 from __future__ import division
  23
  24 import base
  25
  26 from ..i18n import _
  27
  28 class GraphTemplateMemory(base.GraphTemplate):
  29         name = "memory"
  30
  31         upper_limit = 100
  32         lower_limit = 0
  33
  34         rrd_graph = [
  35                 "DEF:used=%(file)s:used:AVERAGE",
  36                 "DEF:cached=%(file)s:cached:AVERAGE",
  37                 "DEF:buffered=%(file)s:buffered:AVERAGE",
  38                 "DEF:free=%(file)s:free:AVERAGE",
  39                 "DEF:swap=%(file)s:swap:AVERAGE",
  40
  41                 "AREA:used#90EE90:%-15s" % _("Used memory"),
  42                 "VDEF:usedmin=used,MINIMUM",
  43                 "VDEF:usedmax=used,MAXIMUM",
  44                 "VDEF:usedavg=used,AVERAGE",
  45                 "GPRINT:usedmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  46                 "GPRINT:usedmin:%12s\:" % _("Minimum") + " %6.2lf",
  47                 "GPRINT:usedavg:%12s\:" % _("Average") + " %6.2lf\\n",
  48
  49                 "STACK:buffered#4169E1:%-15s" % _("Buffered data"),
  50                 "VDEF:bufferedmin=buffered,MINIMUM",
  51                 "VDEF:bufferedmax=buffered,MAXIMUM",
  52                 "VDEF:bufferedavg=buffered,AVERAGE",
  53                 "GPRINT:bufferedmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  54                 "GPRINT:bufferedmin:%12s\:" % _("Minimum") + " %6.2lf",
  55                 "GPRINT:bufferedavg:%12s\:" % _("Average") + " %6.2lf\\n",
  56
  57                 "STACK:cached#FFD700:%-15s" % _("Cached data"),
  58                 "VDEF:cachedmin=cached,MINIMUM",
  59                 "VDEF:cachedmax=cached,MAXIMUM",
  60                 "VDEF:cachedavg=cached,AVERAGE",
  61                 "GPRINT:cachedmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  62                 "GPRINT:cachedmin:%12s\:" % _("Minimum") + " %6.2lf",
  63                 "GPRINT:cachedavg:%12s\:" % _("Average") + " %6.2lf\\n",
  64
  65 #               "STACK:free#7799ff:%-15s" % _("Free memory"),
  66 #               "VDEF:freemin=free,MINIMUM",
  67 #               "VDEF:freemax=free,MAXIMUM",
  68 #               "VDEF:freeavg=free,AVERAGE",
  69 #               "GPRINT:freemax:%12s\:" % _("Maximum") + " %6.2lf" ,
  70 #               "GPRINT:freemin:%12s\:" % _("Minimum") + " %6.2lf",
  71 #               "GPRINT:freeavg:%12s\:" % _("Average") + " %6.2lf\\n",
  72
  73                 "LINE3:swap#ff0000:%-15s" % _("Used Swap space"),
  74                 "VDEF:swapmin=swap,MINIMUM",
  75                 "VDEF:swapmax=swap,MAXIMUM",
  76                 "VDEF:swapavg=swap,AVERAGE",
  77                 "GPRINT:swapmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  78                 "GPRINT:swapmin:%12s\:" % _("Minimum") + " %6.2lf",
  79                 "GPRINT:swapavg:%12s\:" % _("Average") + " %6.2lf\\n",
  80         ]
  81
  82         @property
  83         def graph_title(self):
  84                 return _("Memory Usage")
  85
  86         @property
  87         def graph_vertical_label(self):
  88                 return _("Percent")
  89
  90
  91 class MemoryObject(base.Object):
  92         rrd_schema = [
  93                 "DS:used:GAUGE:0:100",
  94                 "DS:cached:GAUGE:0:100",
  95                 "DS:buffered:GAUGE:0:100",
  96                 "DS:free:GAUGE:0:100",
  97                 "DS:swap:GAUGE:0:100",
  98         ]
  99
 100         @property
 101         def id(self):
 102                 return "default"
 103
 104         def collect(self):
 105                 f = None
 106
 107                 try:
 108                         f = open("/proc/meminfo")
 109                         for line in f.readlines():
 110                                 if line.startswith("MemTotal:"):
 111                                         total = float(line.split()[1])
 112                                 if line.startswith("MemFree:"):
 113                                         free = float(line.split()[1])
 114                                 elif line.startswith("Buffers:"):
 115                                         buffered = float(line.split()[1])
 116                                 elif line.startswith("Cached:"):
 117                                         cached = float(line.split()[1])
 118                                 elif line.startswith("SwapTotal:"):
 119                                         swapt = float(line.split()[1])
 120                                 elif line.startswith("SwapFree:"):
 121                                         swapf = float(line.split()[1])
 122
 123                         ret = [
 124                                 "%s" % ((total - (free + buffered + cached)) * 100 / total),
 125                                 "%s" % (cached * 100 / total),
 126                                 "%s" % (buffered * 100 / total),
 127                                 "%s" % (free * 100 / total),
 128                         ]
 129
 130                         if swapt:
 131                                 ret.append("%s" % ((swapt - swapf) * 100 / swapt))
 132                         else:
 133                                 ret.append("0")
 134
 135                         return ret
 136                 finally:
 137                         if f:
 138                                 f.close()
 139
 140
 141 class MemoryPlugin(base.Plugin):
 142         name = "memory"
 143         description = "Memory Usage Plugin"
 144
 145         templates = [GraphTemplateMemory]
 146
 147         @property
 148         def objects(self):
 149                 yield MemoryObject(self)