#!/opt/OV/bin/Perl/bin/perl -w

# nnm2rrdtool.ovpl
# Copyright Greg Baker (gregb@ifost.org.au) 2007

=head1 Integration tool from HP OpenView Network Node Manager to rrdtool

This is a very simple program I wrote to take data collected by snmpCollect
(one of the openview services inside network node manager) and store it in
rrdtool. This means that all data will be in 3 places -- the trend database
in the filesystem, in the OpenView data warehouse, and inside rrdtool.

The program takes three arguments:

=over

=item The path name to the trend database file

=item The path name to the rrd file you want things stored into

=item A pattern match for the hostname you are wanting data for

=back

So, to use this you would

=over

=item Run rrdtool create once for each instance of each mib of each computer you want data collected for. Read the rrdtool tutorial for the syntax of this.

=item Set up data collection inside NNM

=item Run a copy of this program once for each instance of each mib of each computer you are collecting. 

=over

A really sensible idea that I haven't done yet is to have some way of creating
LRF files so that nnm2rrdtool.ovpl is running at all times. 

Better still would be a tool that automatically did all the above steps for
you. Maybe one day...

=cut

use strict;

die "Usage: nnm2rrdtool.ovpl path-to-snmpCollection-file path-to-rrd-file pattern-match" unless $#ARGV == 2;

open (SNMPDATA,"snmpColDump -f -T $ARGV[0] |")
  || die "Couldn't run snmpCollect";

my (@fields);
while (<SNMPDATA>) {
  @fields = split;
  system("rrdtool update $ARGV[1] $fields[5]:$fields[4]")
    if $fields[3] =~ /$ARGV[2]/;
}