Munin contributed plugins

#!/usr/bin/perl -w

#

# xmlrpc based munin plugin for monitoring rtorrent's memory usage

# prerequisites:

#  - rtorrent 0.7.5 or newer compiled with --with-xmlrpc-c

# check http://libtorrent.rakshasa.no/wiki/RTorrentXMLRPCGuide for further informations

#

# written by Gabor Hudiczius

# web: http://projects.cyla.homeip.net/rtwi/wiki/rTorrentOMeter

# email: ghudiczius@gmail.com

#

# 0.2.0 - 080619

#  support for scgi_port and scgi_local

#  configurable via munin env variables

#  initial release

#

#

# Parameters:

#

#	config		required

#

#

# Configurable variables

#

#	src		"socket" when using scgi_socket, or anything else when using scgi_port

#	socket		rTorrent's rpc socket (scgi_local)	- using scgi_local	- needed, when "src" is set to "socket"

#	ip		rTorrent's ip address			- using scgi_port	- needed, when "src" is NOT set to "socket"

#	port		rTorrent's scgi port (scgi_port)	- using scgi_port	- needed, when "src" is NOT set to "socket"

#	category        Change graph category

#

# Configuration example

#

#	[rtom_mem]

#	user username

#	env.src socket

#	env.socket /home/user/torrent/.socket/rpc.socket

#	env.category Category	

#

#	[rtom_mem]

#	env.ip 127.0.0.1

#	env.port 5000

#

#

#%# family=auto

if ( $ARGV[0] and $ARGV[0] eq "autoconf" ) {

	exit 1;

}

if ( $ARGV[0] and $ARGV[0] eq "config" ) {

	my $category = $ENV{"category"} || "";

	print "graph_title rTorrent memory usage\n";

	print "graph_args --base 1024 --lower-limit 0\n";

	print "graph_vlabel Bytes\n";

	print "graph_category torrent ".${category}."\n";

	print "mem.label Memory usage\n";

	print "mem.info Memory osage of rTorrent\n";

	print "mem.type GAUGE\n";

	print "mem.draw LINE2\n";

	exit 0;

}

use IO::Socket;

my $src 	= $ENV{"src"} || "";

my $ip		= $ENV{"ip"} || "127.0.0.1";

my $port	= $ENV{"port"} || "5000";

my $socket	= $ENV{"socket"} || "";

my $pattern	= qr/<value><(int|i4|i8|ex\.i8)>(\d+)<\/(int|i4|i8|ex\.i8)><\/value>/;

my $line	= "<?xml version=\"1.0\" encoding=\"utf-8\"?><methodCall><methodName>get_memory_usage</methodName></methodCall>";

my $llen	= length $line;

my $header	= "CONTENT_LENGTH\000${llen}\000SCGI\001\000";

my $hlen	= length $header;

$line		= "${hlen}:${header},${line}";

if ( ( defined $src ) && ( $src eq "socket" ) ) {

	socket( SOCK, PF_UNIX, SOCK_STREAM, 0 ) or die;

	connect( SOCK, sockaddr_un( $socket ) ) or die $!;

} else {

	socket( SOCK, PF_INET, SOCK_STREAM, getprotobyname( "tcp" ) );

	connect( SOCK, sockaddr_in( $port, inet_aton( $ip ) ) );

}

print SOCK $line;

flush SOCK;

my $mem = 0;

while ( $line = <SOCK> ) {

	if ( $line =~ /$pattern/ ) {

		$mem = $2;

	}

}

close (SOCK);

print "mem.value ${mem}\n";

exit;