Munin contributed plugins

#!/bin/sh

#    Copyright (C) 2013 Alexandru Iacob

#

#    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; either version 2 of the License, or

#    (at your option) any later version.

#

#    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.

######################################################################################################

#       The plugin will generate a graph that displays the page load time

#		We need to add our custom log format into Apache config.

#		The plugin was tested on Ubuntu Server 12.04.02 LTS

#

#		apache2.conf

#		LogFormat "%h %l %u %t \"%r\" %>s %O %b %D \"%{Referer}i\" \"%{User-Agent}i\"" custom

#

#		According to : http://httpd.apache.org/docs/2.2/mod/mod_log_config.html

#		%D 	The time taken to serve the request, in microseconds.

#		In our case %D -> 9

######################################################################################################

#	GLOBALS

LOGFILE="/var/log/apache2/access.log"

BUFFER_SIZE=500

######################################################################################################

do_ () {

    command="tail -n $BUFFER_SIZE $LOGFILE | awk '{sum=sum+\$9} END {print \"exec_time.value \"(sum/$BUFFER_SIZE)/1000000}'"

    eval $command

    exit 0

}

do_config () {

    echo "graph_title Average page execution time"

    echo "graph_vlabel Seconds"

    echo "graph_category webserver"

    echo "graph_args --base 1000 -l 0"

    echo "graph_info Average page execution time"

    echo "exec_time.label Execution time"

    echo "exec_time.type GAUGE"

}

case $1 in

    config|'')

	eval do_$1

esac

exit $?