Reachability Test

Testscripte um zu testen, ob ein Server noch nach Aussen sieht oder nicht.

Diese Scripte erfordern screen:

# apt-get install screen

Init Script

Folgendes Skript nach /etc/init.d/ kopieren und ausführbar machen. /etc/init.d/reachabilitytest:

#! /bin/sh

### BEGIN INIT INFO
# Provides:          reachability test
# Required-Start:    $network
# Required-Stop:     
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: pings switch.ch(130.59.138.57) and metas.ch(162.23.8.239) to test the reachability
# Description:       more foo for your bars
### END INIT INFO

# Carry out specific functions when asked to by the system
case "$1" in
  start)
    echo "Starting reachability test" 

    screen -dm -S reachabilityswitch /etc/reachabilityscript_switch.sh
    screen -dm -S reachabilitymetas /etc/reachabilityscript_metas.sh 

    ;;
  stop)
    echo "Stopping reachability test" 

    screen -X -S reachabilityswitch quit
    screen -X -S reachabilitymetas quit
    ;;
  *)
    echo "Usage: /etc/init.d/reachabilitytest {start|stop}"
    exit 1
    ;;
esac

exit 0

Startscripts

Diese beiden Skripte in /etc erstellen und ausführbar machen.

/etc/reachabilityscript_switch.sh:

#!/bin/bash

host=130.59.138.57

while :; do
    result=`ping -W 20 -c 1 $host | grep 'bytes from '`
    if [ $? -gt 0 ]; then
        echo -e "`date +'%Y/%m/%d %H:%M:%S'` - host $host is down" >> /var/log/reachability/reachability_switch.txt
    else
        echo -e "`date +'%Y/%m/%d %H:%M:%S'` - host $host is ok -`echo $result | cut -d ':' -f 2`" >> /var/log/reachability/reachability_switch.txt
        sleep 20 # avoid ping rain
    fi
done

/etc/reachabilityscript_metas.sh:

#!/bin/bash

host=162.23.8.239

while :; do
    result=`ping -W 20 -c 1 $host | grep 'bytes from '`
    if [ $? -gt 0 ]; then
        echo -e "`date +'%Y/%m/%d %H:%M:%S'` - host $host is down" >> /var/log/reachability/reachability_switch.txt
    else
        echo -e "`date +'%Y/%m/%d %H:%M:%S'` - host $host is ok -`echo $result | cut -d ':' -f 2`" >> /var/log/reachability/reachability_switch.txt
        sleep 20 # avoid ping rain
    fi
done