Munin contributed plugins

#!/usr/bin/perl

#

# Copyright (C) 2006 - Rodolphe Quiedeville <rodolphe@quiedeville.org>

# Copyright (C) 2003-2004 - Andreas Buer

#

# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

#

# $Log$

# Revision 1.0  2006/04/28 09:04:01  rodo

# Add lower limit fixed to 0

#

# Revision 1.0  2006/04/26 16:04:01  rodo

# Created by Rodolphe Quiedeville

#

# Parameters:

#

#   config

#   autoconf

#

# Configuration variables

#

#   mysqlopts     - Options to pass to mysql

#   mysqladmin    - Override location of mysqladmin

#

#%# family=auto

#%# capabilities=autoconf

use strict;

my $MYSQLADMIN = $ENV{mysqladmin} || "mysqladmin";

my $COMMAND    = "$MYSQLADMIN $ENV{mysqlopts} extended-status";

my $COMMANDSIZE = "$MYSQLADMIN $ENV{mysqlopts} variables";

my %WANTED = ( "Qcache_free_memory" => "free" );

my $arg = shift();

if ($arg eq 'config') {

    print_config();

    exit();

} elsif ($arg eq 'autoconf') {

    unless (test_service() ) {

        print "yes\n";

    } else {

        print "no\n";

    }

    exit;

}

my ($free, $used) = (0,0);

open(SERVICE, "$COMMAND |")

  or die("Coult not execute '$COMMAND': $!");

while (<SERVICE>) {

    my ($k, $v) = (m/(\w+).*?(\d+(?:\.\d+)?)/);

    next unless ($k);

    if (exists $WANTED{$k} ) {

	$free = $v;

	print("$WANTED{$k}.value $v\n");

    }

}

close(SERVICE);

open(SERVICE, "$COMMANDSIZE |")

  or die("Coult not execute '$COMMANDSIZE': $!");

while (<SERVICE>) {

    my ($k, $v) = (m/(\w+).*?(\d+(?:\.\d+)?)/);

    next unless ($k);

    if ($k eq "query_cache_size" ) {

	print("used.value ",($v-$free),"\n");

    }

}

close(SERVICE);

sub print_config {

    print('graph_title MySQL Queries Cache Size

graph_args --base 1024 -l 0

graph_vlabel bytes

graph_category mysql

graph_order used free

graph_total Total

graph_info Plugin available at <a href="http://rodolphe.quiedeville.org/hack/munin/">http://rodolphe.quiedeville.org/hack/munin/</a>

used.label Used

used.draw AREA

free.label Free

free.draw STACK

');

}

sub test_service {

    my $return = 1;

    system ("$MYSQLADMIN --version >/dev/null 2>/dev/null");

    if ($? == 0)

    {

	system ("$COMMAND >/dev/null 2>/dev/null");

	if ($? == 0)

	{

	    print "yes\n";

	    $return = 0;

	}

	else

	{

	    print "no (could not connect to mysql)\n";

	}

    }

    else

    {

	print "no (mysqladmin not found)\n";

    }

    exit $return;

}