Nagios Plugin to check if a cronjob is enabled/disabled through NRPE, by checking if the line on crontab has been commented out or not.

check_cronjob

#!/bin/bash
#
#    Program : check_cronjob
#

PROGNAME=`basename $0`
REVISION=`echo '$Revision: 0.1 $' | sed -e 's/[^0-9.]//g'`

. /usr/lib/nagios/plugins/utils.sh

print_usage() {
        echo "Usage: $PROGNAME [-C cronjob] [-s status]"
        echo "          -C      Cronjob name"
        echo "          -s      Status to check (enabled/disabled)"
        echo ""
        echo "Usage: $PROGNAME --help"
        echo "Usage: $PROGNAME --version"
}

print_help() {
        print_revision $PROGNAME $REVISION
        echo ""
        echo "Nagios Plugin to check if a cronjob is running through NRPE"
        echo ""
        print_usage
        echo ""
        echo "Cronjob Status Check. - Nico Marengo 2013"
        echo ""
        exit 0
#        support
}

exitstatus=$STATE_WARNING #default
MSG="Missing options. Run -h for help"
while test -n "$1"; do
        case "$1" in
                --help)
                        print_help
                        exit $STATE_OK
                        ;;
                -h)
                        print_help
                        exit $STATE_OK
                        ;;
                --version)
                        print_revision $PROGNAME $REVISION
                        exit $STATE_OK
                        ;;
                -V)
                        print_revision $PROGNAME $REVISION
                        exit $STATE_OK
                        ;;
                -C)
                    CRONJOB=$2;
                    shift;
                    ;;
                -s) STATUS=$2;
                    shift;
                ;;

                *)
                        echo "Unknown argument: $1"
                        print_usage
                        exit $STATE_UNKNOWN
                        ;;
        esac
        shift
done

if [ -z "$CRONJOB" ]; then
        exitstatus=$STATE_CRITICAL
        MSG="What Cronjob?"
fi

JOB=`crontab -l | grep "${CRONJOB}" | head -c 1`
DISABLEDSTATUS='#'

if [ -z "$JOB" ]; then
        exitstatus=$STATE_CRITICAL
        MSG="Cronjob not found"
else
        if [ -z "$STATUS" ]; then
                exitstatus=$STATE_CRITICAL
                MSG="What Status?"
        elif [ "$STATUS" = "enabled" ]; then
                if [ "$JOB" != $DISABLEDSTATUS ];then
                        exitstatus=$STATE_OK
                        MSG="OK: enabled"
                elif [ "$JOB" = $DISABLEDSTATUS ];then
                        exitstatus=$STATE_CRITICAL
                        MSG="CRITICAL: disabled"
                fi
        elif [ "$STATUS" = "disabled" ]; then
                if [ "$JOB" != $DISABLEDSTATUS ];then
                        exitstatus=$STATE_CRITICAL
                        MSG="CRITICAL: enabled"
                elif [ "$JOB" = $DISABLEDSTATUS ];then
                        exitstatus=$STATE_OK
                        MSG="OK: disabled"
                fi
        fi
fi

echo $MSG
exit $exitstatus

name_of_your_file.cfg

define service{
        use                             generic-service         ; Name of service template to use
        host_name                       SERVER-HOST-NAME
        service_description             My Cron Check
        check_command                   check_nrpe!check_NAME_cron
        }

nrpe.cfg

command[check_NAME_cron]=/usr/lib/nagios/plugins/check_cronjob -C NAME -s enabled

Hi,

I have followed this article and run this command "command[check_NAME_cron]=/usr/lib/nagios/plugins/check_cronjob -C NAME -s enabled"

How I can get the name of cronjob Name?

Thanks

Hi,

thanks for sharing this Nagios probe. I was thinking about maybe extending it to cover some form of last run status too (I have not started tinkering with it yet).
However, as you did not attach any license to your code yet, I do not know if the extended version I want to create would be compatible with the MIT license (see https://github.com/AmadeusITGroup/monitoring-plugins repo on GitHub).

Thanks in advance for your help clarifying if I can build upon your work (with credits where they are due) or if it would be better to separate the additional checks in a separate probe to avoid licensing conflicts :)

@re-schneider . Please feel free to re-use, extend, etc. Happy for it to go on MIT license. Thanks for getting in touch.