Nagios script: check_processes

2006-06-01 00:00:00

This script was written at the time I was hired by KPN i-Diensten. It is reproduced/shared here with their permission.

A very simply script that takes a list of processes, instead of a single processes name (as is the case with check_process). This should make monitoring a basic list of processes a lot easier. I really should change the script in such a way that it takes the process list from the command line, instead of from the $LIST variable that's defined internally. I'll do that when I have the time.

Until I've made those change, I use the script by copying check_processes to a new file which is used specifically for one purpose. For example check_linux_processes and check_solaris_processes check a list of processes that should be up and running on Linux and Solaris respectively.

This check script should work on just about any UNIX OS.

#!/bin/bash
#
# Process monitor plugin for Nagios
# Written by Thomas Sluyter (nagiosATkilalaDOTnl)
# By request of KPN-IS, i-Provide, the Netherlands
# Last Modified: 13-07-2006
# 
# Usage: ./check_solaris_processes
#
# Description:
# This script couldn't be simpler than it is. It just checks to see
# whether a predefined list of processes is up and running. 
#
# Limitations:
#   This script should work properly on all implementations of Linux, Solaris
# and Mac OS X.
#
# Output:
# If there one of the processes is down, a CRIT is issued.
#

# You may have to change this, depending on where you installed your
# Nagios plugins
PROGNAME="check_linux_processes"
PATH="/usr/bin:/usr/sbin:/bin:/sbin"
LIBEXEC="/usr/local/nagios/libexec"
. $LIBEXEC/utils.sh


### DEFINING THE PROCESS LIST ###
LIST="init"


### REQUISITE NAGIOS COMMAND LINE STUFF ###

print_usage() {
        echo "Usage: $PROGNAME"
        echo "Usage: $PROGNAME --help"
}

print_help() {
        echo ""
        print_usage
        echo ""
        echo "Basic processes list monitor plugin for Nagios"
        echo ""
        echo "This plugin not developped by the Nagios Plugin group."
        echo "Please do not e-mail them for support on this plugin, since"
        echo "they won't know what you're talking about :P"
        echo ""
        echo "For contact info, read the plugin itself..."
}

while test -n "$1" 
do
        case "$1" in
          --help) print_help; exit $STATE_OK;;
          -h) print_help; exit $STATE_OK;;
          *) print_usage; exit $STATE_UNKNOWN;;
        esac
done


### FINALLY THE MAIN ROUTINE ###

COUNT="0"
DOWN=""

for PROCESS in `echo $LIST`
do
        if [ `ps -ef | grep -i $PROCESS | grep -v grep | wc -l` -lt 1 ]
        then
                let COUNT=$COUNT+1
                DOWN="$DOWN $PROCESS"
        fi
done

if [ $COUNT -gt 0 ]
then
        echo "NOK - $COUNT processes not running: $DOWN"
        exit $STATE_CRITICAL
fi

# Nothing caused us to exit early, so we're okay.
echo "OK - All requisite processes running."
exit $STATE_OK

kilala.nl tags: nagios, unix, programming,

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