Conky is a lightweight system monitor which displays arbitrary information on the linux desktop. I wanted to display the nagios status not only in the firefox browser (using the recommended! “nagios checker” extension, but also from the desktop. I found a shell script which was written for xfce and adapted it to output conky compatible output.

How to use it:

• copy-paste the code below into a script file, e.g. $HOME/bin/nagiosmon.sh, and make it executable with chmod +x
• add the call to nagiosmon in your .conkyrc file:
  ${execpi 53 $HOME/bin/nagiosmon.sh}

#!/bin/bash
#
# Written by Dieter Plaetinck
# Updated by Bernhard Brunner
# * adapted for conky
#
# Licensed under the GPL V3
# See gnu.org/licenses/gpl-3.0.html
#
# works for Nagios 2.x or nagios 3.x
URL=http://neptunvm/nagios3/cgi-bin/tac.cgi
USERNAME=nagiosadmin
PASSWORD=<nagiosadminpassword>
 
PAGE=$(curl -s -k -u $USERNAME:$PASSWORD $URL)
#echo $PAGE
 
HOSTS_DOWN=$( echo -e "$PAGE" | grep "hoststatustypes=4' class='hostHeader'" | awk '{print $5}' | cut -c 20-)
HOSTS_UNREACHABLE=$( echo -e "$PAGE" | grep "hoststatustypes=8' class='hostHeader'" | awk '{print $5}' | cut -c 20-)
HOSTS_UP=$( echo -e "$PAGE" | grep "hoststatustypes=2' class='hostHeader'" | awk '{print $5}' | cut -c 20-)
HOSTS_PENDING=$( echo -e "$PAGE" | grep "hoststatustypes=1' class='hostHeader'" | awk '{print $5}' | cut -c 20-)
 
SERVICES_CRIT=$( echo -e "$PAGE" | grep "servicestatustypes=16' class='serviceHeader'" | awk '{print $5}' | cut -c 23-)
SERVICES_WARN=$( echo -e "$PAGE" | grep "servicestatustypes=4' class='serviceHeader'" | awk '{print $5}' | cut -c 23-)
SERVICES_UNKNOWN=$( echo -e "$PAGE" | grep "servicestatustypes=8' class='serviceHeader'" | awk '{print $5}' | cut -c 23-)
SERVICES_OK=$( echo -e "$PAGE" | grep "servicestatustypes=2' class='serviceHeader'" | awk '{print $5}' | cut -c 23-)
SERVICES_PENDING=$( echo -e "$PAGE" | grep "servicestatustypes=1' class='serviceHeader'" | awk '{print $5}' | cut -c 23-)
 
if [[ "$HOSTS_DOWN" == "" ]]
then
  echo '${font Radio Space:size=13}${color red}Nagios:DOWN${color}${font}'
else	
  if [[ $(($HOSTS_DOWN + $SERVICES_CRIT)) > 0 ]]
  then
    echo '${font Radio Space:size=13}${color red}Nagios:ERROR${color}${font}'
  else
    if [[ $SERVICES_WARN > 0 ]]
    then
      echo '${font Radio Space:size=12}${color orange}Nagios:Warn${color}${font}'
    else
      echo '${font Radio Space:size=11}${color }Nagios:OK${color}${font}'
    fi
  fi
fi

Ref:

• http://dieter.plaetinck.be/nagios_monitoring_in_your_desktop_panel_aka_Xfce_Genmon_panel_plugin_rules

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