Munin contributed plugins

#!/usr/bin/perl

# 

# Copyright (c) 2008, Maxime Besson

# Copyright (c) 2011, David Bernard

# 

# Permission to use, copy, modify, and/or distribute this software for any

# purpose with or without fee is hereby granted, provided that the above

# copyright notice and this permission notice appear in all copies.

# 

# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

#

# 

# Graph VE load averages on an OpenVZ server

#

# This plugin needs root privileges to call vzlist, so add this :

#

# [openvz_loadavg]

# user root

#

# to your munin config (or use sudo)

#

# Changelog

# version 0.1 - 2008 September 17

# Maxime Besson <mabes@smile.fr>

# - Script creation

# version 0.2 - 2011 July 18

# Bernard David <daber@smile.fr>

# - Script improvements : multigraph

use strict;

my $arg=shift(@ARGV);

# Various tests

if ( ! -d "/proc/vz" ) {

	print "This server does not seem to run OpenVZ\n";

	exit(1);

}

if ( $> ne "0" ) {

	print "Must run as root\n";

	exit(1);

}

# Autoconfig

if ( $arg eq "autoconf" ) {

	print "yes\n";

} elsif ( $arg eq "config" ) {

        print "multigraph openvz_loadavg\n";

        print "graph_title loadavg of VE\n";

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

        print "graph_scale no\n";

        print "graph_vlabel loadavg\n";

        print "graph_info Shows 5-minute load average per VE\n";

        print "graph_category OpenVZ\n";

	# Dynamic config

	my @result=`/usr/sbin/vzlist -H -a -s veid -o veid,name`;

	my $A=0; # draw an area only under the first line

	for (@result ) {

		( my $veid,my $label ) = /^\s*(\d+)\s*([\w\-]+)\s*$/ ;

		my $name = $label;

                $name =~ s/\W/_/g;

                print "$name.label $label: load average\n";

                print "$name.min 0\n";

                if ($A==0) {

                        print "$name.draw AREA\n";

                        $A=1;

                }else{

                        print "$name.draw STACK\n";

                }

        }

	for (@result ) {

		( my $veid,my $label ) = /^\s*(\d+)\s*([\w\-]+)\s*$/ ;

		my $name = $label;

                $name =~ s/\W/_/g;

                print "multigraph openvz_loadavg.$name\n";

                print "graph_title loadavg of VE\n";

                print "graph_vlabel loadavg\n";

		print "$name.label $label: load average\n";

		print "$name.info Average load on $label for the past 5 minutes\n";

                print "$name.min 0\n";

       		print "$name.draw AREA\n";

	}

} else {

        # Getting the values

	my @result=`/usr/sbin/vzlist -H -s veid -o veid,name,laverage`;

	my $A=0;

        print "multigraph openvz_loadavg\n";

        print "graph_title loadavg of VE\n";

        print "graph_vlabel loadavg\n";

        print "graph_category OpenVZ\n";

	for (@result ) {

		if (( my $veid,my $label, my $laverage ) = /^\s*(\d+)\s+([\w\-]+)\s+[\d\.]+\/([\d\.]+)\/[\d\.]+\s*$/) {

			my $name = $label;

			$name =~ s/\W/_/g;

                        print "$name.label $name\n";

                        print "$name.min 0\n";

                        if ($A==0) { print "$name.draw AREA\n"; $A=1; } else { print "$name.draw STACK\n"; }

                        print "$name.value $laverage\n"

                }

        }

}