Cacti with External RRD Files: Empty Graphs

[chiggins]

Hey there,

I'm setting up Cacti to use RRD's created by nagiosgraph / rrdtool and have set up one set of graphs following these instuctions:

http://forums.cacti.net/viewtopic.php?t=12202

All of the data seems to be present in the Legend area, permissions are ok, and I'm getting no errors, but my graphs are blank. The X data timeline is correct, but the Y data is always 0.0 - 1.0 and the graph is empty, just gridlines.

The odd thing is that, using drraw and the same rrd, rrdtool creates the graph just fine with data graphed as you'd expect. So, I'm guessing its something in my Cacti setup / settings.

Anyone see something similar?

Thanks for any help.

-Chris

[gandalf]

Please visit this graph at Graph Management and switch to DEBUG. Post the whole rrdtool graph statement, please
Reinhard

[chiggins]

Thanks for the reply. Here it is:

RRDTool Command:

/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="trender01 - Root Partition Template" \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="" \
--slope-mode \
DEF:a="/usr/local/nagios/nagiosgraph/rrd/trender01/Root%20Partition___%2F.rrd":blockpct:AVERAGE \
DEF:b="/usr/local/nagios/nagiosgraph/rrd/trender01/Root%20Partition___%2F.rrd"AVERAGE \
DEF:c="/usr/local/nagios/nagiosgraph/rrd/trender01/Root%20Partition___%2F.rrd":inodepct:AVERAGE \
DEF:d="/usr/local/nagios/nagiosgraph/rrd/trender01/Root%20Partition___%2F.rrd":max:AVERAGE \
DEF:e="/usr/local/nagios/nagiosgraph/rrd/trender01/Root%20Partition___%2F.rrd":root:AVERAGE \
DEF:f="/usr/local/nagios/nagiosgraph/rrd/trender01/Root%20Partition___%2F.rrd":user:AVERAGE \
GPRINTLAST:"Current\:%8.2lf %s" \
GPRINTAVERAGE:"Average\:%8.2lf %s" \
GPRINTMAX:"Maximum\:%8.2lf %s\n" \
GPRINTLAST:"Current\:%8.2lf %s" \
GPRINTAVERAGE:"Average\:%8.2lf %s" \
GPRINTMAX:"Maximum\:%8.2lf %s\n" \
GPRINT:c:LAST:"Current\:%8.2lf %s" \
GPRINT:c:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:c:MAX:"Maximum\:%8.2lf %s\n" \
GPRINT:d:LAST:"Current\:%8.2lf %s" \
GPRINT:d:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:d:MAX:"Maximum\:%8.2lf %s\n" \
GPRINT:e:LAST:"Current\:%8.2lf %s" \
GPRINT:e:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:e:MAX:"Maximum\:%8.2lf %s\n" \
GPRINT:f:LAST:"Current\:%8.2lf %s" \
GPRINT:f:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:f:MAX:"Maximum\:%8.2lf %s\n"

RRDTool Says:

OK

[gandalf]

That's an easy one: The Graph Template simply does not include any LINEx/AREA statement but LEGENDs only. You may consider the first link of my signature to learn how to add a LINEx or an AREA
Reinhard

[chiggins]

Thanks! I'm glad it was an easy one.

Last question: Is there any where that describes the difference between these Graph Types? I see them mentioned in the docs, but without any details.

Thanks again,

-C

[gandalf]

Thanks! I'm glad it was an easy one.

Last question: Is there any where that describes the difference between these Graph Types? I see them mentioned in the docs, but without any details.

LINEx will draw a line. x=1 is smallest, x=3 is thickest. AREA will draw a line that's filled up from to x-axis up to that very line.
Documented at "man rrdgraph"
Reinhard

[chiggins]

Very cool. Thanks.

[cmaythecuzz]

I seem to be having a similar issue . Graphs show numbers but nothing in the graph itself. Debug output below. Any help would be appreciated.

/usr/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-60 \
--title='Nginx Prod LB1' \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit='0' \
--vertical-label='' \
--slope-mode \
--font TITLE:10: \
--font AXIS:7: \
--font LEGEND:8: \
--font UNIT:7: \
DEF:a="/usr/share/cacti/site/rra/prod-lb1/nginx.rrd":'reading':AVERAGE \
DEF:b="/usr/share/cacti/site/rra/prod-lb1/nginx.rrd":'requests':AVERAGE \
DEF:c="/usr/share/cacti/site/rra/prod-lb1/nginx.rrd":'total':AVERAGE \
DEF:d="/usr/share/cacti/site/rra/prod-lb1/nginx.rrd":'waiting':AVERAGE \
DEF:e="/usr/share/cacti/site/rra/prod-lb1/nginx.rrd":'writing':AVERAGE \
AREA:a#FFAB00FF:"Reading\:" \
GPRINTLAST:" Current\:%8.2lf %s" \
GPRINTMAX:"Maximum\:%8.2lf %s" \
GPRINTMIN:"Minimum\:%8.2lf %s\n" \
AREA:b#FF6044FF:"Requests\:":STACK \
GPRINTLAST:"Current\:%8.2lf %s" \
GPRINTMAX:"Maximum\:%8.2lf %s" \
GPRINTMIN:"Minimum\:%8.2lf %s\n" \
AREA:c#FF5576FF:"Total\:":STACK \
GPRINT:c:LAST:" Current\:%8.2lf %s" \
GPRINT:c:MAX:"Maximum\:%8.2lf %s" \
GPRINT:c:MIN:"Minimum\:%8.2lf %s\n" \
AREA:d#FF4105FF:"Waiting":STACK \
GPRINT:d:LAST:" Current\:%8.2lf %s" \
GPRINT:d:MAX:"Maximum\:%8.2lf %s" \
GPRINT:d:MIN:"Minimum\:%8.2lf %s\n" \
AREA:e#ED5394FF:"Writing":STACK \
GPRINT:e:LAST:" Current\:%8.2lf %s" \
GPRINT:e:MAX:"Maximum\:%8.2lf %s" \
GPRINT:e:MIN:"Minimum\:%8.2lf %s\n"
RRDTool Says:
OK

[gandalf]

A screenshot of that graph will help
R.