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#!@@PERL@@ -w
# -*- perl -*-
=head1 NAME
squid_objectsize - Plugin to graph the mean size of stored objects in
the squid cache
=head1 CONFIGURATION
The following environment variables are used by this plugin:
squidhost - host (default "localhost")
squidport - port (default "3128")
squiduser - username (default "")
squidpasswd - password (default "")
=head1 AUTHOR
Copyright 2008 Bjørn Ruberg
=head1 NOTES
Based on and shamelessly copied from the other squid_ Munin plugins
=head1 LICENSE
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 dated June, 1991.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=cut
my $ret = undef;
if (! eval "require IO::Socket;") {
$ret = "IO::Socket not found";
}
if (! eval "require MIME::Base64;") {
$ret = "MIME::Base64 not found";
}
$squid_host = $ENV{squidhost} || "localhost";
$squid_port = $ENV{squidport} || 3128;
$user = $ENV{squiduser} || "";
$passwd = $ENV{squidpasswd} || "";
if($ARGV[0] and $ARGV[0] eq "autoconf") {
&autoconf($squid_host, $squid_port, $user, $passwd);
}
sub autoconf {
my ($host, $port, $user, $passwd) = @_;
if ($ret) {
print "no ($ret)\n";
exit 0;
}
my $cachemgr = IO::Socket::INET->new (PeerAddr => $host,
PeerPort => $port,
Proto => 'tcp');
if (!$cachemgr) {
print "no (could not connect: $!)\n";
exit 0;
}
my $request = "GET cache_object://$host/info HTTP/1.0\r\n" .
"Accept: */*\r\n" .
&make_auth_header ($user, $passwd) .
"\r\n";
$cachemgr->syswrite ($request, length($request));
my @lines = $cachemgr->getlines();
print "yes\n";
exit 0;
}
sub make_auth_header {
my ($user, $passwd) = @_;
if (!defined $passwd || $passwd eq "") {
return "";
} else {
my $auth = MIME::Base64::encode_base64(($user ? $user : "") . ":$passwd", "");
return "Authorization: Basic $auth\r\n" .
"Proxy-Authorization: Basic $auth\r\n";
}
}
sub query_squid {
my ($host, $port, $user, $passwd) = @_;
my $cachemgr = IO::Socket::INET->new (PeerAddr => $host,
PeerPort => $port,
Proto => 'tcp') or die($!);
my $request = "GET cache_object://$host/info HTTP/1.0\r\n" .
"Accept: */*\r\n" .
&make_auth_header ($user, $passwd) .
"\r\n";
$cachemgr->syswrite ($request, length($request));
my @lines = grep (/Mean Object Size/, $cachemgr->getlines());
my $line = pop @lines;
if ($line =~ /^.*?\:\s+(\d+(?:\.\d+)?)\s+(M|K)?B$/i) {
$val = $1;
$unit = $2;
if ($unit eq "K") { $val *= 1024; } elsif ($unit eq "M") { $val *= 1048576; }
print "objectsize.value $val\n";
}
}
if($ARGV[0] and $ARGV[0] eq "config") {
print "graph_title Squid object size\n";
print "graph_vlabel bytes\n";
print "graph_args -l 0\n";
print "graph_category squid\n";
print "objectsize.label Object size\n";
exit 0;
}
&query_squid ($squid_host, $squid_port, $user, $passwd);
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