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|
#!@@PERL@@
#
# Plugin to monitor connections per second, for LVS loadbalancers.
#
# Wildcard names:
#
# cps_<port>
# cps_<vip>_<port>
#
# Examples:
#
# cps_smtp
# cps_mail.foo.boo_smtp
# cps_pop3
# cps_www.foo.boo_www
# cps_vvv.foo.boo_www
#
# Parameters understood:
#
# config (required)
# autoconf (optional - used by munin-config)
# suggest (optional - used by munin-config)
#
# Magic markers - optional - used by installation scripts and munin-config:
#
#%# family=auto
#%# capabilities=autoconf suggest
#
use warnings;
use strict;
if ( defined $ARGV[0] and $ARGV[0] eq "autoconf" ) {
autoconf ();
}
if ( defined $ARGV[0] and $ARGV[0] eq "suggest" ) {
my $sipvs;
$sipvs = &ipvs (".", ".", $sipvs);
exit 0 if $sipvs == undef;
suggest ($sipvs);
}
unless ($0 =~ /cps(?:_([^_]+)|)_(.+)\s*$/) {
die "Could not parse name $0.\n";
}
my $vip = $1;
my $port = $2;
my $ipvs;
#print "$vip:$port\n";
use Socket;
my $name;
my $address;
$address = inet_aton($vip);
$name = gethostbyaddr($address,AF_INET);
#print "$vip:$port\n";
#print "Name: $0\nPort: $port\nVip : $vip\n";
# Read ipvsadm-output
$ipvs = &ipvs ($vip, $port, $ipvs);
if ( defined $ARGV[0] and $ARGV[0] eq "config" ) {
config ($vip, $port, $ipvs);
}
$vip = $vip || "";
if (exists ($ipvs->{$vip}) and exists ($ipvs->{$vip}->{$port})) {
foreach my $host (sort keys %{$ipvs->{$vip}->{$port}}) {
(my $fname = $host) =~ s/[.-]/_/g;
print "$fname.value ", $ipvs->{$vip}->{$port}->{$host}, "\n";;
}
}
sub autoconf {
system ("/sbin/ipvsadm -L -n --stats >/dev/null 2>/dev/null");
if ($? == 0) {
print "yes\n";
exit 0;
}
elsif ($? & 127) {
print "no (system call exited with %d)", $? & 127;
}
elsif (($?>>8) == 2) {
print "no (permission denied)\n";
exit 0;
}
elsif (($?>>8) == 127) {
print "no (ipvsadm not found)\n";
exit 0;
} else {
print "no (unknown ipvsadm return value: $?, %d)\n", $? >> 8;
exit 0;
}
}
sub suggest {
my $ipvs = shift;
exit 0 unless $ipvs;
foreach my $vip (sort keys %{$ipvs}) {
foreach my $port (sort keys %{$ipvs->{$vip}}) {
print "${vip}_$port\n";
}
}
exit 0;
}
sub config {
my $vip = shift;
my $port = shift;
my $ipvs = shift;
print "graph_title Loadbalanced ",($name?$name:"*"),"->",$port," connections\n";
print "graph_args -l 0\n";
print "graph_total total\n";
print "graph_vlabel connections / \${graph_period}\n";
print "graph_category network\n";
my $first=1;
$vip = $vip || "";
if (exists ($ipvs->{$vip}) and exists ($ipvs->{$vip}->{$port})) {
foreach my $host (sort keys %{$ipvs->{$vip}->{$port}}) {
(my $fname = $host) =~ s/[.-]/_/g;
if ( $first == 1 ) {
print "$fname.draw AREA\n";
$first=0
} else {
print "$fname.draw STACK\n";
}
print "$fname.type DERIVE\n";
$host =~ s/-bak//;
print "$fname.label $host\n";
print "$fname.max 1000\n";
print "$fname.min 0\n";
}
}
exit 0;
}
sub ipvs {
my $vip = shift;
my $port = shift;
my $ipvs = shift;
open (IPVS, "/sbin/ipvsadm -L -n --stats 2>/dev/null|") or return undef;
my $cvip = "";
my $cport = "";
while (<IPVS>) {
next if /^IP Virtual Server/;
next if /^Prot\s+LocalAddress/;
if (/^(\w+)\s+([\w\.-]+):([\w\d]+)\s+(\d+)[KMG]?\s+/) {
$cvip = ($vip?$2:"");
$cport = $3;
}
elsif (/^\s+->\s+([^:]+):(\S+)\s+(\d+)G\s+/) {
$ipvs->{$cvip}->{$cport}->{$1} += ($3*1000000000);
}
elsif (/^\s+->\s+([^:]+):(\S+)\s+(\d+)M\s+/) {
$ipvs->{$cvip}->{$cport}->{$1} += ($3*1000000);
}
elsif (/^\s+->\s+([^:]+):(\S+)\s+(\d+)K\s+/) {
$ipvs->{$cvip}->{$cport}->{$1} += ($3*1000);
}
elsif (/^\s+->\s+([^:]+):(\S+)\s+(\d+)\s+/) {
$ipvs->{$cvip}->{$cport}->{$1} += $3;
}
}
close (IPVS) or return undef;
return $ipvs;
}
# vim:syntax=perl
|
