Munin contributed plugins

#!/usr/bin/perl -w

#

# 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>

#

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

#

# Your nginx configuration should look like this (i.e. $request_length $body_bytes_sent at the end):

#   log_format main  '$remote_addr - $remote_user $time_local "$request" '

#                    '$status $body_bytes_sent "$http_referer" '

#                    '"$http_user_agent" $request_length $body_bytes_sent';

#

# Log can be gather from multiple sources by simply specifying multiple log filename and/or an array with two

# elements: log filename and a regex.

#   - 'prod' => array('/home/prod/log/access.log'),

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

#   - 'test' => array(array('/var/log/httpd/access.log', '"[A-Z]+ /test/'), '/home/test/log/access.log')

#     Test graph will be using eveything in /home/test/log/access.log and stuff that match '"[A-Z] /test/' in 

#     /var/log/httpd/access.log such as '"GET /test/'

$server = 'Nginx';

$statepath = '/usr/local/var/munin/plugin-state'; # directory where logtail will save the state

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

%logs = (

'prod' => ('/home/prod/log/access.log'),

'test' => (

            ('/var/log/httpd/access.log', '"[A-Z]+ /test/'),

            '/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 $server\n";

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

    while (($client, $files) = each(%logs)) {

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

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

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

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

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

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

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

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

    }

    exit(0);

  }

}

while (($client, $files) = each(%logs)) {

  $i = $o = $x = 0;

  foreach $file ($files) {

    $regex = '';

    $state = $statepath.'/'.$client.$x.'_inoutbandwidth.state';

    if(ref($file) eq 'ARRAY') { ($file, $regex) = @file }

    open(my $lt, "$logtail -f $file -o $state |") or die "Can't open $logtail : $!";

    while (<$lt>) {

      $buf = $_;

      if($buf eq '') { next }

      if(!defined($regex) || $buf =~ m/$regex/) {

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

          $i += $1;

          $o += $2;

        }

      }

    }

    close($lt);

    $x++;

  }

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

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

}