[COLUG] using rrdtool to look at you CPU and mother board temperatures.

[Vincent Herried]

My several year old desk top got wonky.
It was  weird, we were gone for several days over Xmas,
and I had set the thermometer to 55 degres F.
The 2nd morning after we got back my machine was make an alarm
sound from the pc speaker and was shut  down.

I found out what the sound was from by setting the bios  warning temp
low  enough so it was exceeded.

After cleaning the dust out of the fans, I decided to monitor the 
temperature... see the comments in the following shell script....
enjoy.....



#!/bin/bash
# 2008-01-02 vince
# A tool to graph the rrddata from sensorsd
#
# what it does is read in the sensord data
# and create a .png (graphical) file containing
# the results of some of the data that is recorded.
#
# prereqs - lm_sensors sensorsd and rrdtool.
# ln_sensors:
#	use sensors-detect to "detect" and configure
#	the /etc/sensors.conf file
#	follow the directions and start him up.
#	eg:  $ service lm_sensors start

# sensord:
#	first setup the sensord config file
#	to request rrd data and give it the path location.
#	if you are going to use this tool, then you
#	may decide to not record the sensor data in
#	syslogd
#	it will automagically create the rrd data after you
#	setup the config and  start it up.
#
#
# I got help from
# http://www.krogloth.de/alex/linux/grading.html
#
#	The rrd data is created by the sensord
#	daemon.  To find out what is in the dataset,
#	after collecting some data, print out some current
#	data eg  $ sensors
#
#	then examine the contents of the rrd data
#	eg.  $ rrdtool dump <rrdfile> |less
#
#	by inspection, I found the following two entries
#	that matched up with my mother board temperaturs
#	and cpu temperatures (from sensors above)...
#        <ds>
#                <name> in0_9 </name>
#                <type> GAUGE </type>
#                <minimal_heartbeat> 1500 </minimal_heartbeat>
#                <min> 0.0000000000e+00 </min>
#                <max> 2.5000000000e+02 </max>
#
#                <!-- PDP Status -->
#                <last_ds> 29.0 </last_ds>
#                <value> 4.9958300000e-01 </value>
#                <unknown_sec> 0 </unknown_sec>
#        </ds>
#
#        <ds>
#                <name> in0_A </name>
#                <type> GAUGE </type>
#                <minimal_heartbeat> 1500 </minimal_heartbeat>
#                <min> 0.0000000000e+00 </min>
#                <max> 2.5000000000e+02 </max>
#
#                <!-- PDP Status -->
#                <last_ds> 45.0 </last_ds>
#                <value> 7.7521500000e-01 </value>
#                <unknown_sec> 0 </unknown_sec>
#        </ds>
#	.
#	.
#	.
#   ------------------------------------------------
#	from inspection in0_9 and in0_A matched the
#	mother board and cpu temp respectively.
#
#
#
# location of rrdtool
RRDTOOL=/usr/bin/rrdtool
# location of output
OUTPUT=/tmp/rrd.png
# location of input file
FILE=/var/log/sensors.rrd

$RRDTOOL graph $OUTPUT \
        -t "CPU Temperature" -v "In Degrees C." \
        --start="now-4d" \
        --end="now" \
        --height="120" \
        --width="440" \
        -c "BACK#000000" \
        -c "SHADEA#000000" \
        -c "SHADEB#000000" \
        -c "FONT#DDDDDD" \
        -c "CANVAS#202020" \
        -c "GRID#666666" \
        -c "MGRID#AAAAAA" \
        -c "FRAME#202020" \
        -c "ARROW#FFFFFF" \
        "DEF:cp_temp=$FILE:in0_A:AVERAGE" \
        "DEF:mb_temp=$FILE:in0_9:AVERAGE" \
        "LINE1:cp_temp#F90000:CPU Temp" \
        "GPRINT:cp_temp:LAST:Last\: %5.2lf C" \
        "GPRINT:cp_temp:MIN:Min\: %5.2lf C" \
        "GPRINT:cp_temp:MAX:Max\: %5.2lf C" \
        "GPRINT:cp_temp:AVERAGE:Avg\: %5.2lf C" \
	"LINE2:mb_temp#ea8f00:M/B Temp" \
	"GPRINT:mb_temp:LAST:Last\: %5.2lf C" \
	"GPRINT:mb_temp:MIN:Min\: %5.2lf C"\
	"GPRINT:mb_temp:MAX:Max\: %5.2lf C"\
	"GPRINT:mb_temp:AVERAGE:Avg\: %5.2lf C"\
	>/dev/null

#
##############the end#############


-- 
my website is http://planetvince.info
v