[hobbit] bbmrtg.pl help

[McDonald, Dan]

On Wed, 2009-06-17 at 14:05 -0500, Jared Hoskinson wrote:
> Hello all
> 
>  I need to alarm on bandwidth thresholds so I have added bbmrtg.pl  
> using this guide, http://www.pleiades.com/mrtgbb/.  Everything is 
> working expect when bbmrtg.pl runs it reports  "In: bytes/sec (0.0%) 
> Out: bytes/sec (0.0%)". When look at the graph produced by mrtg-rrd.cgi, 
> it reports the correct usage which in case is "Current In: 68.8 Mb/s 
> Current Out: 25Mb/s". It is as if bbmrgt.pl is not reading the rrd file.

It's a timing problem - the rrd is being written after bbmrtg reads it,
so it's returning NaN.

I had to add a call to RRDs::last to make it work right:
   } elsif ($BACKEND eq 'RRD') {
        $last = RRDs::last($targetLog);
        my $first = $last - 300;
        my ($start, $step, $names, $data)
            = RRDs::fetch "-s $first","-e $last", $targetLog, 'AVERAGE';
        foreach my $dat (@$data) {
            if (defined($$dat[0])) {
               $i_now=($factor * $$dat[0]);
            }
            if (defined($$dat[1])) {
                $o_now=($factor * $$dat[1]);
            }
        }

        warn "last: $last, i_now: $i_now, o_now: $o_now\n" if $tron;

Sorry, I don't have the original code to do a proper diff...


-- 
Daniel J McDonald, CCIE # 2495, CISSP # 78281, CNX
www.austinenergy.com
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