[rrd-users] Beginner problems

[Mathias Koerber]

Hi,

I am just beginning with RRDtool, trying to monitor and graph certain
system parameters (here: lm_sensors).

I have set up lm_sensors, and the command '$ sensors' returns this:

	# sensors
	as99127f-i2c-0-2d
	Adapter: SMBus Via Pro adapter at e800
	Algorithm: Non-I2C SMBus adapter
	VCore1:    +1.79 V  (min =  +1.74 V, max =  +1.93 V)
	VCore2:    +0.09 V  (min =  +1.74 V, max =  +1.93 V)       ALARM
	3p3V:      +3.34 V  (min =  +3.13 V, max =  +3.45 V)
	5V:        +5.04 V  (min =  +4.72 V, max =  +5.24 V)
	12V:      +12.20 V  (min = +10.79 V, max = +13.19 V)
	m12V:     -10.40 V  (min = -10.78 V, max = -13.18 V)       ALARM
	m5V:       -3.87 V  (min =  -4.74 V, max =  -5.24 V)       ALARM
	fan1:     6887 RPM  (min = 3000 RPM, div = 2)
	fan2:        0 RPM  (min = 4500 RPM, div = 2)
	temp1:       +36°C  (limit =  +60°C, hysteresis =  +50°C)
	temp2:     +43.1°C  (limit =  +67°C, hysteresis =  +60°C)        (beep)
	temp3:    +112.2°C  (limit =  +60°C, hysteresis =  +50°C)
	vid:      +1.85 V
	alarms:   Chassis intrusion detection
	beep_enable:
	          Sound alarm enabled

I wrote a matching perl script to call this and update the .rrdfile:

	# cat readsensors
	#!/usr/bin/perl

	use lib "/usr/local/rrdtool/lib/perl";
	use RRDs;

	$sensors = "lm_sensors.rrd";
	$step = 300;

	$debug = 1;

	if ($ARGV[0] =~ /create/i) {
	        RRDs::create ($sensors, "--step", $step,
	                "DS:vcore1:GAUGE:600:U:U",
	                "DS:vcore2:GAUGE:600:U:U",
	                "DS:3p3v:GAUGE:600:U:U",
	                "DS:5v:GAUGE:600:U:U",
	                "DS:12v:GAUGE:600:U:U",
	                "DS:m12v:GAUGE:600:U:U",
	                "DS:m5v:GAUGE:600:U:U",
	                "DS:fan1:GAUGE:600:U:U",
	                "DS:fan2:GAUGE:600:U:U",
	                "DS:temp1:GAUGE:600:U:U",
	                "DS:temp2:GAUGE:600:U:U",
	                "DS:temp3:GAUGE:600:U:U",
	                "DS:vid:GAUGE:600:U:U",
	                "RRA:AVERAGE:0.5:1:1200",
	                "RRA:MIN:0.5:12:2400",
	                "RRA:MAX:0.5:12:2400",
	                "RRA:AVERAGE:0.5:12:2400",
	                );
	        my $ERR=RRDs::error;
	        die "ERROR while updating $sensors: $ERR\n" if $ERR;
	        exit 0;
	        }

	open(SENSORS," sensors|") || die " could not run sensors. $!";
	while (<SENSORS>) {
	        if (/(.+):\s*\+?(\-?\d+\.?\d*)/i) {
	                $value{lc($1)}=$2;
	                print lc($1) . " = $2\n" if $debug;
	                };
	}
	close(SENSORS);

	$t = join(':',keys %value);
	$v = join(':',values %value);

	print "$t\n$v\n" if $debug;

	RRDs::update ($sensors, "-t", $t, "N:".$v);
	my $ERR=RRDs::error;
	die "ERROR while updating $sensors: $ERR\n" if $ERR;
	exit 0;

Callin this script (with debug =1), I get:
# ./readsensors
	vcore1 = 1.79
	vcore2 = 0.09
	3p3v = 3.34
	5v = 5.04
	12v = 12.20
	m12v = -10.40
	m5v = -3.87
	fan1 = 6887
	fan2 = 5720
	temp1 = 36
	temp2 = 43.1
	temp3 = 112.2
	vid = 1.85
	temp2:temp3:vid:3p3v:vcore1:fan1:12v:vcore2:fan2:5v:m12v:temp1:m5v
	43.1:112.2:1.85:3.34:1.79:6887:12.20:0.09:5720:5.04:-10.40:36:-3.87

yes, after calling this several times over 20 minutes or so I cannot graph
the date:
	# rrdtool graph *rrd -a PNG
	ERROR: can't make a graph without contents

Dumping the data reveals wrong values (they are all changing wildly after
each update though
the values in each update stay mostly the same), and all archive data is
NaN.

What am I doing wrong?

--
Mathias Körber     |2385 Bay Road  |Tel:+1-650-381.6044|Fax:+1-650-381.6055
Sr. Consult. Engr. |Redwood City   |Direct Fax/Voicemail:+1-240-368.1170
Nominum, Inc.      |CA 94063, USA  |Private: Mobile:+65-9815.7807
mathias at nominum.com|www.nominum.com|E:mathias at koerber.org|Fax/Vmail:+1-801-6
50.9591


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