Munin contributed plugins

#!/usr/bin/perl -w

use strict;

#

# byprojects_inout_bandwidth

#

# Perl script to monitor in/out bandwidth *byprojects* (e.g. vhost) from 

# multiple files and/or regex.

#

# Danny Fullerton <northox@mantor.org> 

# Mantor Organization <www.mantor.org>

# This work is licensed under a MIT license.

#

# You need logtail (https://www.fourmilab.ch/webtools/logtail/)

#

# mod_logio apache module (https://httpd.apache.org/docs/2.0/mod/mod_logio.html)

# Your logformat should look like this:

# "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O"

# where %I is input and %O is output.

#

# Log can be gathered from multiple sources by simply specifying multiple log 

# filename or using wildcards (glob). File content can be selected using regex.

#

# - 'prod' => [ {'path' => '/home/prod/log/access.log'} ],

#   Prod graph will be using everything in /home/prod/log/access.log

#

# - 'test' => [ {'path' => '/var/log/access.log', 'regex' => '"[A-Z]+ /test/'},

#               {'path' => '/home/test/log/access*.log'} ],

#   Test graph will be using everything file matching /home/test/log/access*.log

#   and stuff that match the expression '"[A-Z] /test/' in /var/log/access.log

#   such as '"GET /test/'

my $server = 'Apache';

my $statepath = $ENV{MUNIN_PLUGSTATE};

my $logtail = '/usr/local/bin/logtail';

my %logs = (

    'prod' => [

                {'path' => '/home/prod/log/access.log'}

              ],

    'dev'  => [

                {'path' => '/var/log/httpd/ssl-dev-access.log'},

                {'path' => '/home/dev/log/access.log'}

              ],

    'test' => [

                {'path' => '/var/log/access.log', 'regex' => '"[A-Z]+ /test/'},

                {'path' => '/home/test/log/access.log'}

              ],

);

###########

if(defined($ARGV[0])) {

  if ($ARGV[0] eq 'autoconf') {

    print "yes\n";

    exit(0);

  } elsif ($ARGV[0] eq 'config') {

    print "graph_title $server in/out bandwidth byprojects\n";

    print "graph_args --base 1000\n";

    print "graph_vlabel bits per \${graph_period} in (-) / out (+)\n";

    print "graph_category webserver\n";

    print "graph_info This graph show $server in/out bandwidth used by various" .

     " projects.\n";

    while ((my $project, my @files) = each(%logs)) {

      print "i".$project.".label $project\n";

      print "i".$project.".type GAUGE\n";

      print "i".$project.".graph no\n";

      print "i".$project.".cdef i".$project.",8,*\n";

      print "o".$project.".label $project\n";

      print "o".$project.".type GAUGE\n";

      print "o".$project.".negative i".$project."\n";

      print "o".$project.".cdef o".$project.",8,*\n";

    }

    exit(0);

  }

}

foreach my $project ( keys %logs )  {

  my $i = 0;

  my $o = 0;

  my $x = 0;

  foreach my $log ( @{$logs{$project}} ) {

    my @paths = glob $log->{'path'};

    foreach my $path (@paths) {

      my $state = $statepath.'/'.$project.$x.'_inoutbandwidth.state';

      open(LT, "$logtail -f ".$log->{'path'}." -o $state |") or 

        die "Can't open $logtail : $!";

      while (<LT>) {

        my $buf = $_;

        if($buf eq '') { next }

        if(!defined($log->{'regex'}) || $buf =~ m/$log->{'regex'}/) {

          if($buf =~ m/(\d+) (\d+)$/) {

            $i += $1;

            $o += $2;

          }

        }

      }

      close(LT);

      $x++;

    }

  }

  print "i".$project.".value $i\n";

  print "o".$project.".value $o\n";

}