Munin contributed plugins

#!/usr/bin/perl

#

# Parameters supported:

#

# 	config

# 	autoconf

#

# Configurable variables

#

# 	url      - Override default status-url

#

# Must be symlinked to what the graph should monitor. Run with --suggest

# to see valid targets - or just run munin-node-configure --shell

#

# Written by Bj?rn Ruberg 2006-2007

#

# Magic markers:

#%# family=auto

#%# capabilities=autoconf suggest

my $ret = undef;

if (!eval "require LWP::UserAgent;") {

  $ret = "LWP::UserAgent not found";

}

# watch-list exists on localhost

# watch-info does not

my %plugs = (

	     'bytes'     => 'Input/output (bytes)',

	     'requests'  => 'Requests',

	     'documents' => 'Documents served',

            );

my $URL = exists $ENV{'url'} ? $ENV{'url'} : "http://localhost:%d/watch-list";

my @PORTS = exists $ENV{'ports'} ? split(' ', $ENV{'ports'}) : (80);

my $type = "throughput";

if (exists $ARGV[0] and $ARGV[0] eq "autoconf") {

  if ($ret) {

    print "no ($ret)\n";

    exit 1;

  }

  my $ua = LWP::UserAgent->new (timeout => 30);

  my @badports;

  foreach my $port (@PORTS) {

    my $url = sprintf $URL, $port;

    my $response = $ua->request (HTTP::Request->new('GET', $url));

    push @badports, $port unless $response->is_success;

  }

  if (@badports) {

    print "no (no mod_watch exists on ports @badports)\n";

    exit 1;

  } else {

    print "yes\n";

    exit 0;

  }

}

if (exists $ARGV[0] and $ARGV[0] eq "suggest") {

  while (my ($key, undef) = each %plugs) {

    print "$key\n";

  }

  exit 0;

}

my @servers = ();

my @data;

foreach my $port (@PORTS) {

  my $ua = LWP::UserAgent->new (timeout => 30);

  my $url = sprintf $URL, $port;

  my $response = $ua->request (HTTP::Request->new ('GET', $url));

  foreach my $string (split (/\n/, $response->content)) {

    my ($server, undef, $ifInOctets, $ifOutOctets, $ifRequests,

        $ifDocuments) = split (/\s/, $string, 6);

    push @servers, $server unless $server eq "SERVER";

    push @data, "$server $ifInOctets $ifOutOctets $ifRequests $ifDocuments"

      unless $server eq "SERVER";

  }

}

# From here and out, the plugin must be run with a symlinked service.

my $check = join ("|", keys %plugs);

die ("Plugin must be symlinked to aspect to be monitored")

  unless $0 =~ /\_($check)$/;

my $action = $1;

if (exists $ARGV[0] and $ARGV[0] eq "config") {

  print "graph_title Apache $plugs{$action}\n";

  print "graph_args --base 1000 -l 0\n";

  print "graph_category webserver\n";

  print "graph_vlabel activity\n";

  my $i = 0;

  foreach my $server (sort (@servers)) {

    (my $txtserver = $server) =~ s/(-|\.)/\_/g;

    my $draw = ($i==0) ? 'AREA' : 'STACK';

    if ($action eq "bytes") {

      print "${txtserver}.label $server\n";

      print "${txtserver}.draw $draw\n";

      print "${txtserver}.type COUNTER\n";

    } else {

      print "${txtserver}.label $server\n";

      print "${txtserver}.draw $draw\n";

      print "${txtserver}.type COUNTER\n";

    }

    $i++;

  }

  exit 0;

}

foreach my $string (sort (@data)) {

  my ($server, $ifInOctets, $ifOutOctets, $ifRequests, $ifDocuments) =

    split (/\s/, $string);

  (my $txtserver = $server) =~ s/(-|\.)/\_/g;

  if ($action eq "documents") {

    print "${txtserver}.value $ifDocuments\n";

  } elsif ($action eq "requests") {

    print "${txtserver}.value $ifRequests\n";

  } elsif ($action eq "bytes") {

    print "${txtserver}.value " . ($ifInOctets + $ifOutOctets) . "\n";

  }

}