#!/bin/bash
# Apache monitorization plugin for Pandora FMS agent
# Author: Manuel A. Gulín Bejarano
# Version: 1.1
# Date: 19/03/2013
#
# 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 3 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, see <http://www.gnu.org/licenses/>.

function help {
        echo -e "Apache monitorization agent plugin for Pandora FMS agent. http://pandorafms.com" 
        echo -e "Apache need the server status module active and accessible from localhost without password" 
        echo -e "Syntax:"
        echo -e "\t\t$0 <mod_status_url>"
        exit
}

if [ $# -ne 1 ]
then
        help
        exit -1
fi

## Info about server - all retrieved with one query, later it's going to be appropiately parsed
ASTAT="`wget -q -O - "$@" --no-check-certificate $1?auto`"
FSTAT="`wget -q -O - "$@" --no-check-certificate $1`"

# Info about CPU usage
AF_CPUULOAD=`echo $FSTAT  | grep -o "CPU Usage: u[0-9]*.[0-9]* s[0-9]*.[0-9]*" | awk '{print $3}' | cut -d"u" -f2 | tail --lines=1`
AF_CPUSLOAD=`echo $FSTAT  | grep -o "CPU Usage: u[0-9]*.[0-9]* s[0-9]*.[0-9]*" | awk '{print $4}' | cut -d"s" -f2 | tail --lines=1`

# Info about performance
AP_REQSEC=`echo $ASTAT | grep -o "ReqPerSec: [0-9.]*" | awk '{print $2}'`
AP_BPS=`echo $ASTAT | grep -o "BytesPerSec: [0-9]*" | awk '{ print $2}'`
AP_TOTACC=`echo $ASTAT | grep -o "Total Accesses: [0-9]*" | awk '{print $3}'`

# Info about apache processes
AP_BUSY=`echo $ASTAT | grep -o "BusyWorkers: [0-9]*" | awk '{print $2}'`
AP_IDLE=`echo $ASTAT | grep -o "IdleWorkers: [0-9]*" | awk '{print $2}'`

# Info about uptime
AP_UPTIME=`echo $ASTAT | grep -o "Uptime: [0-9]*" | grep -o [0-9]*`
AF_REBOOT=`echo $FSTAT | grep -o "<dt>Restart Time: [a-zA-Z]*, [0-9]*-[a-zA-Z]*-[0-9]* [0-9:]* [a-zA-Z]*" | grep -o "[a-zA-Z]*, [0-9]*-[a-zA-Z]*-[0-9]* [0-9:]* [a-zA-Z]*" | tail --lines=1`
AF_RELOADS=`echo $FSTAT | grep -o "Parent Server Generation: [0-9]*" | grep -o [0-9]* | tail --lines=1`

# Some useful info
AP_TOTAL=$((AP_BUSY+AP_IDLE))
AP_TOTAL_MIN_WARN=`echo $AP_TOTAL | awk '{print ($1*0.80)}'`
AP_TOTAL_MAX_WARN=`echo $AP_TOTAL | awk '{print ($1*0.89)}'`
AP_TOTAL_MIN_CRIT=`echo $AP_TOTAL | awk '{print ($1*0.90)}'`


#########################################################################################################
# UPTIME INFO MODULES
#########################################################################################################
echo -e "\t<module>"
echo -e "\t<name><![CDATA[Apache: Restart time]]></name>"
echo -e "\t<description><![CDATA[Restart time]]></description>"
echo -e "\t<type>async_string</type>"
echo -e "\t<min>0</min>"
echo -e "\t<disabled>0</disabled>"
echo -e "\t<data><![CDATA[$AF_REBOOT]]></data>"
#echo -e "\t<crontab>0 * * * *</crontab>"
echo -e "\t</module>"

echo -e "\t<module>"
echo -e "\t<name><![CDATA[Apache: Uptime]]></name>"
echo -e "\t<description><![CDATA[Uptime since reboot (sec)]]></description>"
echo -e "\t<type>generic_data</type>"
echo -e "\t<min>0</min>"
echo -e "\t<disabled>0</disabled>"
echo -e "\t<data><![CDATA[$AP_UPTIME]]></data>"
echo -e "\t</module>"

echo -e "\t<module>"
echo -e "\t<name><![CDATA[Apache: Reloads]]></name>"
echo -e "\t<description><![CDATA[Config reloads since reboot]]></description>"
echo -e "\t<type>async_data</type>"
echo -e "\t<min>0</min>"
echo -e "\t<disabled>0</disabled>"
echo -e "\t<data><![CDATA[$AF_RELOADS]]></data>"
#echo -e "\t<crontab>0 * * * *</crontab>"
echo -e "\t</module>"

#########################################################################################################
# PERFORMANCE INFO MODULES
#########################################################################################################
echo -e "\t<module>"
echo -e "\t<name><![CDATA[Apache: Total accesses]]></name>"
echo -e "\t<description><![CDATA[Total accesses since reboot]]></description>"
echo -e "\t<type>generic_data</type>"
echo -e "\t<min>0</min>"
echo -e "\t<disabled>0</disabled>"
echo -e "\t<data><![CDATA[$AP_TOTACC]]></data>"
echo -e "\t</module>"

echo -e "\t<module>"
echo -e "\t<name><![CDATA[Apache: Request per second]]></name>"
echo -e "\t<description><![CDATA[Request per second since reboot]]></description>"
echo -e "\t<type>generic_data</type>"
echo -e "\t<min>0</min>"
echo -e "\t<disabled>0</disabled>"
echo -e "\t<data><![CDATA[$AP_REQSEC]]></data>"
echo -e "\t</module>"

echo -e "\t<module>"
echo -e "\t<name><![CDATA[Apache: Bytes per second]]></name>"
echo -e "\t<description><![CDATA[Bytes per second since reboot]]></description>"
echo -e "\t<type>generic_data</type>"
echo -e "\t<min>0</min>"
echo -e "\t<disabled>0</disabled>"
echo -e "\t<data><![CDATA[$AP_BPS]]></data>"
echo -e "\t</module>"

#########################################################################################################
# CPU USAGE INFO MODULES
#########################################################################################################
echo -e "\t<module>"
echo -e "\t<name><![CDATA[Apache: User CPU usage]]></name>"
echo -e "\t<description><![CDATA[User space CPU usage]]></description>"
echo -e "\t<type>generic_data</type>"
echo -e "\t<min>0</min>"
echo -e "\t<disabled>0</disabled>"
echo -e "\t<data><![CDATA[$AF_CPUULOAD]]></data>"
echo -e "\t</module>"

echo -e "\t<module>"
echo -e "\t<name><![CDATA[Apache: System CPU usage]]></name>"
echo -e "\t<description><![CDATA[System space CPU usage]]></description>"
echo -e "\t<type>generic_data</type>"
echo -e "\t<min>0</min>"
echo -e "\t<disabled>0</disabled>"
echo -e "\t<data><![CDATA[$AF_CPUSLOAD]]></data>"
echo -e "\t</module>"

#########################################################################################################
# APACHE PROCESSES INFO MODULES
#########################################################################################################
echo -e "\t<module>"
echo -e "\t<name><![CDATA[Apache: Busy workers]]></name>"
echo -e "\t<description><![CDATA[Number of busy workers]]></description>"
echo -e "\t<type>generic_data</type>"
echo -e "\t<min>0</min>"
echo -e "\t<max>$AP_TOTAL</max>"
echo -e "\t<min_warning>$AP_TOTAL_MIN_WARN</min_warning>"
echo -e "\t<max_warning>$AP_TOTAL_MAX_WARN</max_warning>"
echo -e "\t<min_critical>$AP_TOTAL_MIN_CRIT</min_critical>"
echo -e "\t<max_critical>$AP_TOTAL</max_critical>"
echo -e "\t<disabled>0</disabled>"
echo -e "\t<data><![CDATA[$AP_BUSY]]></data>"
echo -e "\t</module>"

echo -e "\t<module>"
echo -e "\t<name><![CDATA[Apache: Idle workers]]></name>"
echo -e "\t<description><![CDATA[Number of idle workers]]></description>"
echo -e "\t<type>generic_data</type>"
echo -e "\t<min>0</min>"
echo -e "\t<max>$AP_TOTAL</max>"
echo -e "\t<disabled>0</disabled>"
echo -e "\t<data><![CDATA[$AP_IDLE]]></data>"
echo -e "\t</module>"