nrpe-config.sh

#!/bin/sh
set -u
usage()
{
    echo "usage: <command> options: [-t] -i <ip interno da máquina monitoradora> -e <ip externo da máquina monitorada>"
}
while getopts ti:e: OPCAO; do
     case "${OPCAO}" in
        t) modo_teste=1 ;;
        i) ipintradora="${OPTARG}" ;;
        e) ipextradora="${OPTARG}" ;;
     esac
done

if [ -z ${modo_teste+x} ]; then
        echo "Production mode."
        confxinetd="/etc/xinetd.conf"
        confhosts="/etc/hosts.allow"
        confnrpe="/usr/local/nagios/etc/nrpe.cfg"

else
        echo "Test mode."
        mkdir -p testresults

        touch "testresults/xinetd.conf"
        echo -e "#\tonly_from\t=" >> testresults/xinetd.conf

        touch "testresults/hosts.allow"

        touch "testresults/nrpe.cfg"
        echo "command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p /dev/hda1" >> testresults/nrpe.cfg
        echo "allowed_hosts=127.0.0.1" >> testresults/nrpe.cfg

        confxinetd="testresults/xinetd.conf"
        confhosts="testresults/hosts.allow"
        confnrpe="testresults/nrpe.cfg"

fi

echo "Using $confxinetd, $confhosts and $confnrpe."

if [ -z ${ipintradora+x} ]; then
        echo "ERROR: internal IP of the monitoring machine not supplied. Aborting."
        exit 1
fi
if [ -z ${ipextradora+x} ]; then
        echo  "ERROR: exernal IP of the monitoring machine not supplied. Aborting."
        exit 1
fi

sed -i -e "s/^#\tonly_from\t=$/\tonly_from      = 127.0.0.1 $ipintradora $ipextradora/" $confxinetd
grep -q "^ALL: $ipintradora : allow" $confhosts || echo "ALL: $ipintradora : allow" >> $confhosts
grep -q "^ALL: $ipextradora : allow" $confhosts || echo "ALL: $ipextradora : allow" >> $confhosts
sed -i -e 's/check_disk -w 20% -c 10% -p \/dev\/hda1/check_disk -w 20% -c 10% -p \/dev\/sda1/' $confnrpe
sed -i -e "s/^allowed_hosts=127.0.0.1$/allowed_hosts=127.0.0.1, $ipintradora, $ipextradora/" $confnrpe
systemctl restart nrpe
echo "Done."