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#!@@PERL@@
# -*- perl -*-
=head1 NAME
if - plugin to monitor network interfaces
=head1 APPLICABLE SYSTEMS
Every Linux system with network interfaces configured.
=head1 CONFIGURATION
This plugin automatically detects the network interfaces that have seen traffic by using /proc/net/dev.
To specify the location of the /proc/net/dev, set the PROCNETDEV environment
variable. For example:
[if]
env.PROCNETDEV /proc/net/dev
=head1 USAGE
Link this plugin to @@CONFDIR@@/plugins/ and restart the munin-node.
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=head1 BUGS
None known.
=head1 AUTHOR
Brian De Wolf
=head1 LICENSE
GPLv2
=cut
use warnings;
use strict;
use Munin::Plugin;
my $PROCNETDEV = ($ENV{procnetdev} or
(-r "/proc/net/dev" and "/proc/net/dev"));
my $mode = ($ARGV[0] or "print");
if($mode eq "autoconf") {
if($PROCNETDEV and -r $PROCNETDEV) {
print "yes\n";
} else {
print "no\n";
}
exit 0;
}
# Collect data
#
open(FH, $PROCNETDEV)
or die "Failed to open $PROCNETDEV: $!";
my %nics;
# Skip the header
<FH>;<FH>;
while(<FH>) {
chomp;
my @fields = split(/:?\s+/);
# This regex is from if_ autoconf
next if $fields[1] !~ /^(eth|tap|bond|wlan|ath|ra|sw|vlan|venet|veth|msh)[0-9]+(\.[0-9]+)?$/;
# Skip this interface if all counters are zero
next if !grep { /^\d+$/ and $_ != 0 } @fields;
my $nic = $fields[1];
$nic =~ s/\./_/;
$nics{$nic}{in_bytes} = $fields[2];
$nics{$nic}{out_bytes} = $fields[10];
$nics{$nic}{in_packets} = $fields[3];
$nics{$nic}{out_packets} = $fields[11];
$nics{$nic}{in_errors} = $fields[4];
$nics{$nic}{out_errors} = $fields[12];
}
close FH
or die "Failed to close $PROCNETDEV: $!";
# Print data
#
foreach my $type (qw(bytes packets errors)) {
my ($unit);
if($type eq "bytes") {
$unit = "bits";
} elsif($type eq "packets") {
$unit = "packets";
} elsif($type eq "errors") {
$unit = "errors";
}
print "\nmultigraph if_$type\n";
if($mode eq 'config') {
print <<EOF;
graph_title Network $unit per interface
graph_args --base 1000
graph_vlabel $unit in (-) / out (+) per second
graph_category network
EOF
print "graph_order";
foreach my $dir (qw(in out)) {
foreach my $nic (keys %nics) {
print " $type\_$nic\_$dir=if_$type.if_$type\_$nic.if_$type\_$nic\_$dir.$type\_$nic\_$dir";
}
}
print "\n\n";
}
# Print overview graphs
foreach my $nic (keys %nics) {
foreach my $dir (qw(in out)) {
my $fname = "$type\_$nic\_$dir";
if($mode eq 'config') {
print <<EOF;
$fname.label $nic
$fname.type DERIVE
$fname.min 0
$fname.info $unit $dir by $nic
$fname.draw LINE1
$fname.update no
EOF
print "$fname.cdef $fname,8,*\n"
if($type eq 'bytes');
print "$fname.negative $type\_$nic\_in\n"
if($dir eq 'out');
print "$fname.graph no\n"
if($dir eq 'in');
print_thresholds($fname);
} else {
print "$fname.value " . $nics{$nic}{"${dir}_$type"} . "\n";
}
}
}
# Per-interface graphs
foreach my $nic (keys %nics) {
print "\nmultigraph if_$type.if_$type\_$nic\n";
if($mode eq 'config') {
print <<EOF;
graph_title $nic $unit per second
graph_args --base 1000
graph_vlabel $unit per second
graph_category network
EOF
print "graph_order";
foreach my $dir (qw(in out)) {
print " $type\_$nic\_$dir=if_$type\_$nic\_$dir.$type\_$nic\_$dir";
}
print "\n\n";
}
foreach my $dir (qw(in out)) {
my $fname = "$type\_$nic\_$dir";
if($mode eq 'config') {
print <<EOF;
$fname.label $nic
$fname.type DERIVE
$fname.min 0
$fname.update no
EOF
print "$fname.cdef $fname,8,*\n"
if($type eq 'bytes');
print "$fname.negative $type\_$nic\_in\n"
if($dir eq 'out');
print "$fname.graph no\n"
if($dir eq 'in');
} else {
print "$fname.value " . $nics{$nic}{"${dir}_$type"} . "\n";
}
}
}
# Per-interface-direction graphs
foreach my $nic (keys %nics) {
foreach my $dir (qw(in out)) {
print "\nmultigraph if_$type.if_$type\_$nic.if_$type\_$nic\_$dir\n";
if($mode eq 'config') {
print <<EOF;
graph_title $nic $unit $dir per second
graph_args --base 1000
graph_vlabel $unit per second
graph_category network
EOF
}
my $fname = "$type\_$nic\_$dir";
if($mode eq 'config') {
print <<EOF;
$fname.label $nic
$fname.type DERIVE
$fname.min 0
$fname.draw AREA
EOF
print "$fname.cdef $fname,8,*\n"
if($type eq 'bytes');
} else {
print "$fname.value " . $nics{$nic}{"${dir}_$type"} . "\n";
}
}
}
}
# vim: ft=perl sw=4 ts=4 et
|
