[rrd-users] PRINT to stdout - I give up

[Jonathan Disher]

Did you ever get an answer for this?  I'm trying to do something similar, and can't get RRDs::graph to give me output.

-j

On Dec 24, 2011, at 4:29 AM, EA Kissack wrote:

> I've spent hours googling and trying various methods, none of which has 
> worked.  All I want to to print a value from my rrd so that I can make a 
> decision on it in a perl script.  The solution appears to be to specify 
> - as the graph name, dont use a graph command an PRINT.  However I get 
> no output. Hence my call for help (even if only a link to search this 
> archive, as I couldn't find that either).
> 
> I am modifying rrd graphs etc on ipcop version 2.0.2
> 
> Here is the section of /usr/local/bin/makegraphs that I have added:
> 
> sub allan {
>     my @rrd = ();
> 
>     push @rrd, "-";
>     push @rrd, "-s -3600";
>     push @rrd, "DEF:bidevices=$rrdlog/bwin.rrd:idevices:AVERAGE";
>     push @rrd, "DEF:biservers=$rrdlog/bwin.rrd:iservers:AVERAGE";
>     push @rrd, "DEF:biallans=$rrdlog/bwin.rrd:iallans:AVERAGE";
>     push @rrd, "DEF:bikarens=$rrdlog/bwin.rrd:ikarens:AVERAGE";
>     push @rrd, "DEF:bikevins=$rrdlog/bwin.rrd:ikevins:AVERAGE";
>     push @rrd, "DEF:bicarls=$rrdlog/bwin.rrd:icarls:AVERAGE";
>     push @rrd, "DEF:biothers=$rrdlog/bwin.rrd:iothers:AVERAGE";
>     push @rrd, "DEF:bidhcps=$rrdlog/bwin.rrd:idhcps:AVERAGE";
>     push @rrd, "DEF:bidmzs=$rrdlog/bwin.rrd:idmzs:AVERAGE";
>     push @rrd, "DEF:biwlans=$rrdlog/bwin.rrd:iwlans:AVERAGE";
> 
>     push @rrd, "CDEF:idevices=bidevices,8,*";
>     push @rrd, "CDEF:iservers=biservers,8,*";
>     push @rrd, "CDEF:iallans=biallans,8,*";
>     push @rrd, "CDEF:ikarens=bikarens,8,*";
>     push @rrd, "CDEF:ikevins=bikevins,8,*";
>     push @rrd, "CDEF:icarls=bicarls,8,*";
>     push @rrd, "CDEF:iothers=biothers,8,*";
>     push @rrd, "CDEF:idhcps=bidhcps,8,*";
>     push @rrd, "CDEF:idmzs=bidmzs,8,*";
>     push @rrd, "CDEF:iwlans=biwlans,8,*";
>     push @rrd, "CDEF:ihardware=idevices,iservers,+";
>     push @rrd, "CDEF:iguests=iothers,idhcps,iwlans,+,+";
>     push @rrd, 
> "CDEF:itotal=iguests,ihardware,iallans,ikarens,ikevins,icarls,idmzs,+,+,+,+,+,+";
> 
>     push @rrd, "PRINT:itotal:MAX:%9.0lf max\n";
> 
>     RRDs::graph(@rrd);
>     $ERROR = RRDs::error;
>     print "Error in RRD::graph for allan-bandwidth-in: $ERROR\n" if 
> $ERROR;
> }
> 
> This is called further down and is using an rrd that successfully 
> renders to a graph in another procedure. However running the script 
> produces nothing on the command line
> 
> thanks
> -- 
> Allan
> 
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