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
  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                         "DEF:used=%(file)s:used:AVERAGE",
  38                         "DEF:cached=%(file)s:cached:AVERAGE",
  39                         "DEF:buffered=%(file)s:buffered:AVERAGE",
  40                         "DEF:free=%(file)s:free:AVERAGE",
  41                         "DEF:swap=%(file)s:swap:AVERAGE",
  42
  43                         "AREA:used#90EE90:%-15s" % _("Used memory"),
  44                         "VDEF:usedmin=used,MINIMUM",
  45                         "VDEF:usedmax=used,MAXIMUM",
  46                         "VDEF:usedavg=used,AVERAGE",
  47                         "GPRINT:usedmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  48                         "GPRINT:usedmin:%12s\:" % _("Minimum") + " %6.2lf",
  49                         "GPRINT:usedavg:%12s\:" % _("Average") + " %6.2lf\\n",
  50
  51                         "STACK:buffered#4169E1:%-15s" % _("Buffered data"),
  52                         "VDEF:bufferedmin=buffered,MINIMUM",
  53                         "VDEF:bufferedmax=buffered,MAXIMUM",
  54                         "VDEF:bufferedavg=buffered,AVERAGE",
  55                         "GPRINT:bufferedmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  56                         "GPRINT:bufferedmin:%12s\:" % _("Minimum") + " %6.2lf",
  57                         "GPRINT:bufferedavg:%12s\:" % _("Average") + " %6.2lf\\n",
  58
  59                         "STACK:cached#FFD700:%-15s" % _("Cached data"),
  60                         "VDEF:cachedmin=cached,MINIMUM",
  61                         "VDEF:cachedmax=cached,MAXIMUM",
  62                         "VDEF:cachedavg=cached,AVERAGE",
  63                         "GPRINT:cachedmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  64                         "GPRINT:cachedmin:%12s\:" % _("Minimum") + " %6.2lf",
  65                         "GPRINT:cachedavg:%12s\:" % _("Average") + " %6.2lf\\n",
  66
  67 #                       "STACK:free#7799ff:%-15s" % _("Free memory"),
  68 #                       "VDEF:freemin=free,MINIMUM",
  69 #                       "VDEF:freemax=free,MAXIMUM",
  70 #                       "VDEF:freeavg=free,AVERAGE",
  71 #                       "GPRINT:freemax:%12s\:" % _("Maximum") + " %6.2lf" ,
  72 #                       "GPRINT:freemin:%12s\:" % _("Minimum") + " %6.2lf",
  73 #                       "GPRINT:freeavg:%12s\:" % _("Average") + " %6.2lf\\n",
  74
  75                         "LINE3:swap#ff0000:%-15s" % _("Used Swap space"),
  76                         "VDEF:swapmin=swap,MINIMUM",
  77                         "VDEF:swapmax=swap,MAXIMUM",
  78                         "VDEF:swapavg=swap,AVERAGE",
  79                         "GPRINT:swapmax:%12s\:" % _("Maximum") + " %6.2lf" ,
  80                         "GPRINT:swapmin:%12s\:" % _("Minimum") + " %6.2lf",
  81                         "GPRINT:swapavg:%12s\:" % _("Average") + " %6.2lf\\n",
  82                 ]
  83
  84         @property
  85         def graph_title(self):
  86                 _ = self.locale.translate
  87                 return _("Memory Usage")
  88
  89         @property
  90         def graph_vertical_label(self):
  91                 _ = self.locale.translate
  92                 return _("Percent")
  93
  94
  95 class MemoryObject(base.Object):
  96         rrd_schema = [
  97                 "DS:used:GAUGE:0:100",
  98                 "DS:cached:GAUGE:0:100",
  99                 "DS:buffered:GAUGE:0:100",
 100                 "DS:free:GAUGE:0:100",
 101                 "DS:swap:GAUGE:0:100",
 102         ]
 103
 104         @property
 105         def id(self):
 106                 return "default"
 107
 108         def collect(self):
 109                 f = None
 110
 111                 try:
 112                         f = open("/proc/meminfo")
 113                         for line in f.readlines():
 114                                 if line.startswith("MemTotal:"):
 115                                         total = float(line.split()[1])
 116                                 if line.startswith("MemFree:"):
 117                                         free = float(line.split()[1])
 118                                 elif line.startswith("Buffers:"):
 119                                         buffered = float(line.split()[1])
 120                                 elif line.startswith("Cached:"):
 121                                         cached = float(line.split()[1])
 122                                 elif line.startswith("SwapTotal:"):
 123                                         swapt = float(line.split()[1])
 124                                 elif line.startswith("SwapFree:"):
 125                                         swapf = float(line.split()[1])
 126
 127                         ret = [
 128                                 "%s" % ((total - (free + buffered + cached)) * 100 / total),
 129                                 "%s" % (cached * 100 / total),
 130                                 "%s" % (buffered * 100 / total),
 131                                 "%s" % (free * 100 / total),
 132                         ]
 133
 134                         if swapt:
 135                                 ret.append("%s" % ((swapt - swapf) * 100 / swapt))
 136                         else:
 137                                 ret.append("0")
 138
 139                         return ret
 140                 finally:
 141                         if f:
 142                                 f.close()
 143
 144
 145 class MemoryPlugin(base.Plugin):
 146         name = "memory"
 147         description = "Memory Usage Plugin"
 148
 149         templates = [GraphTemplateMemory]
 150
 151         @property
 152         def objects(self):
 153                 yield MemoryObject(self)