138 lines
4.0 KiB
Bash
Executable File
138 lines
4.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# Plugin to monitor the load average on a system.
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#
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# Usage: Link or copy into /etc/munin/node.d/
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#
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# $Log$
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# Revision 1.5 2004/05/20 19:02:37 jimmyo
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# Set categories on a bunch of plugins
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#
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# Revision 1.4 2004/05/20 13:57:12 jimmyo
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# Set categories to some of the plugins.
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#
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# Revision 1.3 2004/05/16 12:41:04 jimmyo
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# Changed load plot from lastminute to last 5 minutes.
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#
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# Revision 1.2 2004/05/16 12:34:26 jimmyo
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# Added "info"-fields to linux/cpu and linux/load plugins, to demonstrate how it works.
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#
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# Revision 1.1 2004/01/02 18:50:01 jimmyo
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# Renamed occurrences of lrrd -> munin
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#
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# Revision 1.1.1.1 2004/01/02 15:18:07 jimmyo
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# Import of LRRD CVS tree after renaming to Munin
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#
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# Revision 1.4 2003/11/15 11:10:28 jimmyo
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# Various fixes
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#
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# Revision 1.3 2003/11/07 17:43:16 jimmyo
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# Cleanups and log entries
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#
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#
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#
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# Magic markers (optional - only used by munin-config and some
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# installation scripts):
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#
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#%# family=auto
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#%# capabilities=autoconf
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# If run with the "autoconf"-parameter, give our opinion on whether we
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# should be run on this system or not. This is optional, and only used by
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# munin-config. In the case of this plugin, we should most probably
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# always be included.
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if [ "$1" = "autoconf" ]; then
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echo yes
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exit 0
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fi
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# If run with the "config"-parameter, give out information on how the
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# graphs should look.
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if [ "$1" = "config" ]; then
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# The host name this plugin is for. (Can be overridden to have
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# one machine answer for several)
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# The title of the graph
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echo 'graph_title Load average'
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# Arguments to "rrdtool graph". In this case, tell it that the
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# lower limit of the graph is '0', and that 1k=1000 (not 1024)
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echo 'graph_args --base 1000 -l 0'
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# The Y-axis label
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echo 'graph_vlabel load'
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# We want Cur/Min/Avg/Max unscaled (i.e. 0.42 load instead of
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# 420 milliload)
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echo 'graph_scale no'
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# Graph category. Defaults to 'other'
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echo 'graph_category system'
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# The fields. "label" is used in the legend. "label" is the only
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# required subfield.
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echo 'load1.label load 1 min avg'
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echo 'load1.draw AREA'
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echo 'load5.label load 5 min avg'
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echo 'load5.draw AREA'
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echo 'load15.label load 15 min avg'
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echo 'load15.draw AREA'
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# These 6 are optional. They are only used if you have
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# configured your munin to tell a Nagios-server about any
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# problems
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echo 'load1.warning 10'
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echo 'load1.critical 120'
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echo 'load5.warning 10'
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echo 'load5.critical 120'
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echo 'load15.warning 10'
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echo 'load15.critical 120'
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# This one is purely to add an explanation to the web page. The first
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# one is for the graph itself, while the second one is for the field
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# "load".
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echo 'graph_info The load average of the machine describes how many processes are in the run-queue (scheduled to run "immediately").'
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echo 'load1.info Average load for 1 minute avg.'
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echo 'load5.info Average load for 5 minutes avg.'
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echo 'load15.info Average load for 15 minutes avg.'
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# Last, if run with the "config"-parameter, quit here (don't
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# display any data)
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exit 0
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fi
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# If not run with any parameters at all (or only unknown ones), do the
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# real work - i.e. display the data. Almost always this will be
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# "value" subfield for every data field.
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echo -n "load1.value "
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cut -f1 -d' ' < /proc/loadavg
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echo -n "load5.value "
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cut -f2 -d' ' < /proc/loadavg
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echo -n "load15.value "
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cut -f3 -d' ' < /proc/loadavg
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# How could this plugin have been written in its simplest form?
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# Something like this:
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#
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# ---------------------
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# #!/bin/sh
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#
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# if [ "$1" = "config" ]; then
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# echo "graph_title Load average"
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# echo 'graph_args --base 1000 -l 0'
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# echo 'graph_vlabel load'
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# echo "load.label load"
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# exit 0
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# fi
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# echo -n "load.value "
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# cut -f1 -d' ' < /proc/loadavg
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# ---------------------
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#
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# Except for the Nagios-warnings (which most people don't have any need
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# for) and things used by installation scripts and munin-config (which
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# you don't need if you don't plan on submitting your plugin to the
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# package), and the scaling (no milliload numbers) the two versions will
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# work identically.
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