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contrib-munin/plugins/vpn/openvpn_multi

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#!/usr/bin/perl -w
=head1 NAME
openvpn_multi - Plugin for monitoring OpenVPN users traffic
=head1 CONFIGURATION
[openvpn_multi]
user root
env.statusfile /var/log/openvpn.status
=head1 AUTHOR
Copyright 2013 Pierre Schweitzer <pierre@reactos.org>
=head1 LICENSE
GNU GPL v2 or any later version
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=cut
use strict;
use Munin::Common::Defaults;
use Munin::Plugin;
my $statusfile = ($ENV{'statusfile'} || '/var/log/openvpn.status');
sub config {
open FILE, $statusfile or die $!;
print "multigraph openvpn_users\n";
print "graph_title OpenVPN traffic\n";
print "graph_args --base 1024 --lower-limit 0\n";
print "graph_vlabel Bytes Out (-) / In (+) per \${graph_period}\n";
print "graph_category network\n";
print "in.label recv\n";
print "in.type DERIVE\n";
print "in.min 0\n";
print "in.graph no\n";
print "in.cdef in,1,*\n";
print "out.label Bps\n";
print "out.type DERIVE\n";
print "out.min 0\n";
print "out.negative in\n";
print "out.cdef out,1,*\n";
while (<FILE>) {
next if ($_ =~ /CLIENT LIST/ || $_ =~ /Updated/ || $_ =~ /Common Name/);
last if ($_ =~ /ROUTING TABLE/);
# client,IP:port,in,out,D M N hour Y
my @values = split(',', $_);
my $name = $values[0];
my $fieldname = clean_fieldname($name);
print "multigraph openvpn_users.$fieldname\n";
print "graph_title OpenVPN traffic for $name\n";
print "graph_args --base 1024 --lower-limit 0\n";
print "graph_vlabel Bytes Out (-) / In (+) per \${graph_period}\n";
print "graph_category network\n";
print "in.label recv\n";
print "in.type DERIVE\n";
print "in.min 0\n";
print "in.graph no\n";
print "in.cdef in,1,*\n";
print "out.label Bps\n";
print "out.type DERIVE\n";
print "out.min 0\n";
print "out.negative in\n";
print "out.cdef out,1,*\n";
}
close FILE;
exit 0;
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}
sub autoconf {
if (-e $statusfile) {
print "yes\n";
exit 0;
} else {
print "no\n";
exit 1;
}
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}
sub report {
my %in;
my %out;
my $tot_in = 0;
my $tot_out = 0;
my %previous_state = restore_state();
my %new_state;
open FILE, $statusfile or die $!;
while (<FILE>) {
next if ($_ =~ /CLIENT LIST/ || $_ =~ /Updated/ || $_ =~ /Common Name/);
last if ($_ =~ /ROUTING TABLE/);
# client,IP:port,in,out,D M N hour Y
my @values = split(',', $_);
my $name = $values[0];
my $in = 0;
my $out = 0;
if (exists $previous_state{$name."_in"} && exists $previous_state{$name."_out"}) {
my $old_in = $previous_state{$name."_in"};
my $old_out = $previous_state{$name."_out"};
if ($old_in <= $values[2] && $old_out <= $values[3]) {
$in = $values[2] - $old_in;
$out = $values[3] - $old_out;
}
}
$in{$name} = $in;
$out{$name} = $out;
$tot_in += $in;
$tot_out += $out;
$new_state{$name."_in"} = $values[2];
$new_state{$name."_out"} = $values[3];
}
close FILE;
print "multigraph openvpn_users\n";
if (exists $previous_state{"total.in"} && exists $previous_state{"total.out"}) {
my $old_tot_in = $previous_state{"total.in"};
my $old_tot_out = $previous_state{"total.out"};
if ($old_tot_in <= $tot_in && $old_tot_out <= $tot_out) {
print "in.value $tot_in\n";
print "out.value $tot_out\n";
} else {
print "in.value 0\n";
print "out.value 0\n";
}
} else {
print "in.value 0\n";
print "out.value 0\n";
}
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$new_state{"total.in"} = $tot_in;
$new_state{"total.out"} = $tot_out;
save_state(%new_state);
for my $name (keys %in) {
my $in = $in{$name};
my $out = $out{$name};
my $fieldname = clean_fieldname($name);
print "multigraph openvpn_users.$fieldname\n";
print "in.value $in\n";
print "out.value $out\n";
}
exit 0;
}
if ($ARGV[0]) {
my $arg = $ARGV[0];
my %funcs = (
config => \&config,
autoconf => \&autoconf,
);
if (exists $funcs{$arg}) {
$funcs{$arg}->();
} else {
die "Unknown argument '$arg'\n";
}
} else {
report();
}