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|
#!@@PERL@@
# -*- perl -*-
=head1 NAME
tc - plugin to monitor traffic control queues
=head1 APPLICABLE SYSTEMS
Every Linux system with tc configured.
=head1 CONFIGURATION
This plugin automatically detects the queues that are configured.
To specify the location of the tc command, set the tc environment variable.
For example:
[tc]
env.tc /sbin/tc
=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 $TC = ($ENV{tc} or
(-x "/sbin/tc" and "/sbin/tc") or
(-x "/usr/sbin/tc" and "/usr/sbin/tc"));
my $mode = ($ARGV[0] or "print");
open(TC, "$TC -s qdisc |")
or die "Failed to run $TC: $!";
my %qdiscs;
my $autoconf = "no";
my $current_qdisc;
while(<TC>) {
chomp;
my $raw = $_;
# An example:
#qdisc pfifo_fast 0: dev eth1 root refcnt 2 bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1
if(/^qdisc/) {
my (undef, $type, $name, undef, $dev) = split(/ /);
# Most linux boxes will have qdiscs, but they'll all be pfifo_fast. If
# we see one that isn't, it implies someone configured tc and would be
# interested in our graphs.
$autoconf = "yes"
if $type ne "pfifo_fast";
$current_qdisc = clean_fieldname("${dev}_$name");
$qdiscs{$current_qdisc}{raw} = $raw;
$qdiscs{$current_qdisc}{name} = "$dev $name";
# Sent 554351897174 bytes 265755405 pkt (dropped 19943, overlimits 0 requeues 1766011)
} elsif(/^ Sent/) {
# split on non-digits, leaving us with just the numbers
my (undef, $bytes, $packets, $dropped, $overlimit, $requeues) = split(/\D+/, $raw);
$qdiscs{$current_qdisc}{bytes} = $bytes;
$qdiscs{$current_qdisc}{packets} = $packets;
$qdiscs{$current_qdisc}{dropped} = $dropped;
$qdiscs{$current_qdisc}{overlimit} = $overlimit;
$qdiscs{$current_qdisc}{requeues} = $requeues;
}
}
close TC
or die "$TC returned error on exit: $!";
if($mode eq 'autoconf') {
print "$autoconf\n";
exit 0;
}
# Print overview graphs
foreach my $type (qw(bps pps dps ops rps)) {
print "\nmultigraph tc_$type\n";
my ($unit, $stat);
if($type eq "bps") {
$unit = "bits";
$stat = "bytes";
} elsif($type eq "pps") {
$unit = "packets";
$stat = "packets";
} elsif($type eq "dps") {
$unit = "dropped packets";
$stat = "dropped";
} elsif($type eq "ops") {
$unit = "overlimit packets";
$stat = "overlimit";
} elsif($type eq "rps") {
$unit = "requeued packets";
$stat = "requeues";
}
if($mode eq 'config') {
print <<EOF;
graph_title Traffic control $unit per second per qdisc
graph_args --base 1000
graph_vlabel $unit per second
graph_category network
EOF
print "graph_order";
foreach my $qdisc (keys %qdiscs) {
print " $qdisc\_$type=tc_$type.$qdisc.$qdisc\_$type";
}
print "\n\n";
}
foreach my $qdisc (keys %qdiscs) {
my $fname = "${qdisc}_$type";
if($mode eq 'config') {
print <<EOF;
$fname.label $qdiscs{$qdisc}{name}
$fname.type DERIVE
$fname.min 0
$fname.update no
$fname.draw LINE1
$fname.info $qdiscs{$qdisc}{raw}
EOF
print "$fname.cdef $fname,8,*\n"
if($type eq 'bps');
print_thresholds($fname);
} else {
print "$fname.value $qdiscs{$qdisc}{$stat}\n";
}
}
# Singleton graphs
foreach my $qdisc (keys %qdiscs) {
my $fname = "${qdisc}_$type";
print "\nmultigraph tc_$type.$qdisc\n";
if($mode eq 'config') {
print <<EOF;
graph_title $qdiscs{$qdisc}{name} $unit per second
graph_args --base 1000
graph_vlabel $unit per second
graph_category network
$fname.label $qdiscs{$qdisc}{name} $type
$fname.type DERIVE
$fname.min 0
$fname.info $qdiscs{$qdisc}{raw}
$fname.draw AREA
EOF
print "$fname.cdef $fname,8,*\n"
if($type eq 'bps');
} else {
print "$fname.value $qdiscs{$qdisc}{$stat}\n";
}
}
}
# vim: ft=perl sw=4 ts=4 et
|
