#!/bin/sh
#
# Plugin to monitor execution time of PHP with access.log from apache server.
# Need to use apache module mod_log_config and have  set logformat like this:
# LogFormat "%h %l %u %T/%D %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" time_combined
#
# Min, Max and Avg are calculated on number of page, default 10. On high traffic site, increase this value and you get a better
# stat, on low traffic site keep small value, it's must be avg number of page every 5 minutes.
#
# Require read permissions for $LOG
#  (set in /etc/munin/plugin-conf.d/munin-node on debian)
# On busy servers you can change value type to COUNTER and set min to 0 to avoid minus peaks at logrotate
#
# Copyright (C) 2012 Ulrich Lusseau
#
# Parameters:
#
#       config   (required)
#       autoconf (optional - used by munin-config)
#
# Magick markers (optional):
#%# family=auto
#%# capabilities=autoconf
#
# config example for /etc/munin/plugin-conf.d/munin-node
#[apache_generate_time]
#user root
#env.logfile /home/newsite/logs/access.log
#env.sitename mon-code
#env.nbrpage 10
#

LOG=${logfile:-/var/log/apache2/access.log}
NAME=${sitename:undefined}
NBRPAGE=${nbrpage}


if [ "$1" = "autoconf" ]; then
        if [ -r "$LOG" ]; then
                echo yes
        else
                echo no
        fi
        exit 0
fi

if [ "$1" = "config" ]; then

        echo 'graph_title Time to generate PHP page ' $NAME 'v2'
        echo 'graph_args --base 1000 -l 0'
        echo 'graph_vlabel Time in microsecond'

        echo "graph_category webserver"
        echo "graph_info This graph shows load time in ms of $target"
        echo "minloadtime.label Min time"
        echo "minloadtime.info Min time"
        echo "avgloadtime.label Avg time"
        echo "avgloadtime.info Avg time"
        echo "maxloadtime.label Max time"
        echo "maxloadtime.info Max time"

        exit 0
fi

 awk '($4 ~ /[0-9]+\/[0-9]+/ && $8 !~ /\.(jpg|JPG|jpeg|JPEG|gif|GIF|png|PNG|txt|TXT|css|CSS|js|JS|zip|ZIP|bmp|BMP)$/)' $LOG     | sed -e :a -e '$q;N;'$NBRPAGE',$D;ba' | awk '{print $4}' | awk -F\/ ' MIN=="" || $2 < MIN {MIN=$2}  MAX=="" || $2 > MAX {MAX=$2}  {SUM += $2} END {print  "minloadtime.value ",MIN/1000,"\navgloadtime.value ",SUM/(NR*1000),"\nmaxloadtime.value ",MAX/1000}'