[collectd] Graphing rrd output of CPU plugin

[Bruno Prémont]

Hallo lanas,

On Sun, 17 April 2011 lanas <lanas at securenet.net> wrote:
>   Are there examples around for quickly graphing the out put of some
> plugin modules (such as CPU) without having to use a web server (as
> shown in first steps).  Simply producing a (some) graphic
> file(s) from the files in cpu-0 directory for instance, to get a feel
> about how it works and how collectd resulting data is worked with
> rddtool. 

Have a look under contributions, there are multiple (CGI) scripts there
that to graphing.
If you want to call rrdtool manually you can still inspire you from their
graph definitions (just have to replace placeholders with correct filenames).

e.g.
  http://git.verplant.org/?p=collectd.git;a=blob;f=contrib/php-collection/definitions.php#l128

Note that for graphs that use more than one RRD files (like CPU) the
required script is more complex (it has to lookup available RRD files
and create appropriate graph definition).

The result for CPU would be (output to stdout):

/usr/bin/rrdtool graph - -a PNG --full-size-mode \
	-s 'end-115m' -e '1303070963' -w '445' -h '150' \
	'-n' \
	'DEFAULT:0:Bitstream Vera Sans' \
	'-v' \
	'Jiffies' \
	'-r' \
	'-u' \
	'100' \
	'-t' \
	'host/cpu-0/cpu' \
	'DEF:idle_min=/var/lib/collectd/host/cpu-0/cpu-idle.rrd:value:MIN' \
	'DEF:idle_avg=/var/lib/collectd/host/cpu-0/cpu-idle.rrd:value:AVERAGE' \
	'DEF:idle_max=/var/lib/collectd/host/cpu-0/cpu-idle.rrd:value:MAX' \
	'CDEF:idle_nnl=idle_avg,UN,0,idle_avg,IF' \
	'DEF:wait_min=/var/lib/collectd/host/cpu-0/cpu-wait.rrd:value:MIN' \
	'DEF:wait_avg=/var/lib/collectd/host/cpu-0/cpu-wait.rrd:value:AVERAGE' \
	'DEF:wait_max=/var/lib/collectd/host/cpu-0/cpu-wait.rrd:value:MAX' \
	'CDEF:wait_nnl=wait_avg,UN,0,wait_avg,IF' \
	'DEF:nice_min=/var/lib/collectd/host/cpu-0/cpu-nice.rrd:value:MIN' \
	'DEF:nice_avg=/var/lib/collectd/host/cpu-0/cpu-nice.rrd:value:AVERAGE' \
	'DEF:nice_max=/var/lib/collectd/host/cpu-0/cpu-nice.rrd:value:MAX' \
	'CDEF:nice_nnl=nice_avg,UN,0,nice_avg,IF' \
	'DEF:user_min=/var/lib/collectd/host/cpu-0/cpu-user.rrd:value:MIN' \
	'DEF:user_avg=/var/lib/collectd/host/cpu-0/cpu-user.rrd:value:AVERAGE' \
	'DEF:user_max=/var/lib/collectd/host/cpu-0/cpu-user.rrd:value:MAX' \
	'CDEF:user_nnl=user_avg,UN,0,user_avg,IF' \
	'DEF:system_min=/var/lib/collectd/host/cpu-0/cpu-system.rrd:value:MIN' \
	'DEF:system_avg=/var/lib/collectd/host/cpu-0/cpu-system.rrd:value:AVERAGE' \
	'DEF:system_max=/var/lib/collectd/host/cpu-0/cpu-system.rrd:value:MAX' \
	'CDEF:system_nnl=system_avg,UN,0,system_avg,IF' \
	'DEF:softirq_min=/var/lib/collectd/host/cpu-0/cpu-softirq.rrd:value:MIN' \
	'DEF:softirq_avg=/var/lib/collectd/host/cpu-0/cpu-softirq.rrd:value:AVERAGE' \
	'DEF:softirq_max=/var/lib/collectd/host/cpu-0/cpu-softirq.rrd:value:MAX' \
	'CDEF:softirq_nnl=softirq_avg,UN,0,softirq_avg,IF' \
	'DEF:interrupt_min=/var/lib/collectd/host/cpu-0/cpu-interrupt.rrd:value:MIN' \
	'DEF:interrupt_avg=/var/lib/collectd/host/cpu-0/cpu-interrupt.rrd:value:AVERAGE' \
	'DEF:interrupt_max=/var/lib/collectd/host/cpu-0/cpu-interrupt.rrd:value:MAX' \
	'CDEF:interrupt_nnl=interrupt_avg,UN,0,interrupt_avg,IF' \
	'DEF:steal_min=/var/lib/collectd/host/cpu-0/cpu-steal.rrd:value:MIN' \
	'DEF:steal_avg=/var/lib/collectd/host/cpu-0/cpu-steal.rrd:value:AVERAGE' \
	'DEF:steal_max=/var/lib/collectd/host/cpu-0/cpu-steal.rrd:value:MAX' \
	'CDEF:steal_nnl=steal_avg,UN,0,steal_avg,IF' \
	'CDEF:steal_stk=steal_nnl' \
	'CDEF:interrupt_stk=interrupt_nnl,steal_stk,+' \
	'CDEF:softirq_stk=softirq_nnl,interrupt_stk,+' \
	'CDEF:system_stk=system_nnl,softirq_stk,+' \
	'CDEF:user_stk=user_nnl,system_stk,+' \
	'CDEF:nice_stk=nice_nnl,user_stk,+' \
	'CDEF:wait_stk=wait_nnl,nice_stk,+' \
	'CDEF:idle_stk=idle_nnl,wait_stk,+' \
	'AREA:idle_stk#ffffff' \
	'LINE1:idle_stk#ffffff:idle     ' \
	'AREA:wait_stk#ffebbf' \
	'LINE1:wait_stk#ffb000:wait     ' \
	'AREA:nice_stk#bff7bf' \
	'LINE1:nice_stk#00e000:nice     ' \
	'AREA:user_stk#bfbfff' \
	'LINE1:user_stk#0000ff:user     ' \
	'AREA:system_stk#ffbfbf' \
	'LINE1:system_stk#ff0000:system   ' \
	'AREA:softirq_stk#ffbfff' \
	'LINE1:softirq_stk#ff00ff:softirq  ' \
	'AREA:interrupt_stk#e7bfe7' \
	'LINE1:interrupt_stk#a000a0:interrupt' \
	'AREA:steal_stk#bfbfbf' \
	'LINE1:steal_stk#000000:steal    '

Bruno