[hobbit] NCV Graph not showing up

25 Apr 2006


      Try replacing "roomtemp" in hobbitserver.cfg with "Temperature".  I'm not
sure if that makes a difference or not, though.  Also, make sure the script
doesn't generate any other text besides "Temperature: <value>"...  I had a
script that output some non-value text before the actual text, which was
causing NCV to try to parse that into a number (and thus "NaN" - Not a
Number).
Hi all,
...
I have just tried to set up a custom NCV graph to monitor the room
temperature.
An external script generates a status page with the following output
(example):
Temperature: 22.92
I have added the following entries to my hobbitserver.cfg:
TEST2RRD="....,roomtemp=ncv"
NCV_roomtemp="Temperature:GAUGE"
GRAPHS="...,roomtemp,ncv"
My roomtemp.rrd File has been created and updates regularly.
Output of rrdtool dump:
<rrd>
<version> 0001 </version>
<step> 300 </step> <!-- Seconds -->
<lastupdate> 1145970097 </lastupdate> <!-- 2006-04-25 15:01:37
METDST -->
    &lt;ds>
            &lt;name> Temperature &lt;/name>
            &lt;type> GAUGE &lt;/type>
            &lt;minimal_heartbeat> 600 &lt;/minimal_heartbeat>
            &lt;min> 0.0000000000e+00 &lt;/min>
            &lt;max> NaN &lt;/max>

            &lt;!-- PDP Status -->
            &lt;last_ds> UNKN &lt;/last_ds>
            &lt;value> 2.1708600000e+03 &lt;/value>
            &lt;unknown_sec> 0 &lt;/unknown_sec>
    &lt;/ds>
After that, I have added the following to my hobbitgraph.cfg:
[roomtemp]
    TITLE Server Room Temperature

    YAXIS degrees

    DEF:temp=roomtemp.rrd:Temperature:AVERAGE

    LINE2:temp#FF0000:Room Temperature

    COMMENT:\n

    GPRINT:threads:LAST: \: %5.1lf (cur)

    GPRINT:threads:MAX: \: %5.1lf (max)

    GPRINT:threads:MIN: \: %5.1lf (min)

    GPRINT:threads:AVERAGE: \: %5.1lf (avg)\n
There is no graph showing up on status page nor on the trends page. On
the status page there is only a link "hobbit graph ncv:roomtemp" and on
the trends page only a link "hobbit graph roomtemp".
What am I doing wrong? Do I have to configure other things than these?
Thank you in advacne for answering.
Chris
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[hobbit] NCV Graph not showing up

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