Hi
In writing a program to run a 5 minute ping / ifconfig rescue (which I think I
may have achieved - appended) I note the cron job
running every 5 minutes
*/5 * * * * root /etc/ping_hosts.sh
/etc/ping_hosts.sh contains:
#!/bin/sh
# pfSense ping helper
# written by Scott Ullrich
# (C)2006 Scott Ullrich
# All rights reserved.
# Format of file should be deliminted by |
# Field 1: Source ip
# Field 2: Destination ip
# Field 3: Ping count
# Field 4: Script to run when service is down
# Field 5: Script to run once service is restored
# Field 6: Ping time threshold
# Field 7: Wan ping time threshold
# Read in ipsec ping hosts
if [ -f /var/db/ipsecpinghosts ]; then
IPSECHOSTS="/var/db/ipsecpinghosts"
fi
# General file meant for user consumption
if [ -f /var/db/hosts ]; then
HOSTS="/var/db/hosts"
fi
# Package specific ping requests
if [ -f /var/db/pkgpinghosts ]; then
PKGHOSTS="/var/db/pkgpinghosts"
fi
cat $PKGHOSTS $HOSTS $IPSECHOSTS >/tmp/tmpHOSTS
if [ ! -d /var/db/pingstatus ]; then
/bin/mkdir -p /var/db/pingstatus
fi
if [ ! -d /var/db/pingmsstatus ]; then
/bin/mkdir -p /var/db/pingmsstatus
fi
PINGHOSTS=`cat /tmp/tmpHOSTS`
for TOPING in $PINGHOSTS ; do
echo "PROCESSING $TOPING"
SRCIP=`echo $TOPING | cut -d"|" -f1`
DSTIP=`echo $TOPING | cut -d"|" -f2`
COUNT=`echo $TOPING | cut -d"|" -f3`
FAILURESCRIPT=`echo $TOPING | cut -d"|" -f4`
SERVICERESTOREDSCRIPT=`echo $TOPING | cut -d"|" -f5`
THRESHOLD=`echo $TOPING | cut -d"|" -f6`
WANTHRESHOLD=`echo $TOPING | cut -d"|" -f7`
echo Processing $DSTIP
# Look for a service being down
ping -c $COUNT -S $SRCIP $DSTIP
if [ $? -eq 0 ]; then
# Host is up
# Read in previous status
PREVIOUSSTATUS=`cat /var/db/pingstatus/$DSTIP`
if [ "$PREVIOUSSTATUS" = "DOWN" ]; then
# Service restored
if [ "$SERVICERESTOREDSCRIPT" != "" ]; then
echo "UP" > /var/db/pingstatus/$DSTIP
echo "$DSTIP is UP, previous state was DOWN .. Running
$SERVICERESTOREDSCRIPT"
echo "$DSTIP is UP, previous state was DOWN .. Running
$SERVICERESTOREDSCRIPT" | logger -p daemon.info -i -t PingMonitor
sh -c $SERVICERESTOREDSCRIPT
fi
fi
echo "UP" > /var/db/pingstatus/$DSTIP
else
# Host is down
PREVIOUSSTATUS=`cat /var/db/pingstatus/$DSTIP`
if [ "$PREVIOUSSTATUS" = "UP" ]; then
# Service is down
if [ "$FAILURESCRIPT" != "" ]; then
echo "DOWN" > /var/db/pingstatus/$DSTIP
echo "$DSTIP is DOWN, previous state was UP .. Running $FAILURESCRIPT"
echo "$DSTIP is DOWN, previous state was UP .. Running $FAILURESCRIPT" |
logger -p daemon.info -i -t PingMonitor
sh -c $FAILURESCRIPT
fi
fi
echo "DOWN" > /var/db/pingstatus/$DSTIP
fi
echo "Checking ping time $DSTIP"
# Look at ping values themselves
PINGTIME=`ping -c 1 -S $SRCIP $DSTIP | awk '{ print $7 }' | grep time | cut -d
"=" -f2`
echo "Ping returned $?"
echo $PINGTIME > /var/db/pingmsstatus/$DSTIP
if [ "$THRESHOLD" != "" ]; then
if [ "$PINGTIME" -gt "$THRESHOLD" ]; then
echo "$DSTIP has exceeded ping threshold $PINGTIME / $THRESHOLD .. Running
$FAILURESCRIPT"
echo "$DSTIP has exceeded ping threshold $PINGTIME / $THRESHOLD .. Running
$FAILURESCRIPT" | logger -p daemon.info -i -t
PingMonitor
sh -c $FAILURESCRIPT
fi
fi
# Wan ping time threshold
WANTIME=`rrdtool fetch /var/db/rrd/wan-quality.rrd AVERAGE -r 120 -s -1min -e
-1min | grep ":" | cut -f3 -d" " | cut -d"e" -f1`
echo "Checking wan ping time $WANTIME"
echo $WANTIME > /var/db/wanaverage
if [ "$WANTHRESHOLD" != "" ]; then
if [ "$WANTIME" -gt "$WANTHRESHOLD" ]; then
echo "$DSTIP has exceeded wan ping threshold $WANTIME / $WANTHRESHOLD ..
Running $FAILURESCRIPT"
echo "$DSTIP has exceeded wan ping threshold $WANTIME / $WANTHRESHOLD ..
Running $FAILURESCRIPT" | logger -p daemon.info -i -t
PingMonitor
sh -c $FAILURESCRIPT
fi
fi
done
exit 0
What is this supposed to do? (And is it supposed to do what I was wanting to
do, but not quite?)
With thanks
David Hingston
/etc/pinger.sh is called from crontab and is now:
#!/bin/sh
if ! ping -c1 Static_ip_Gateway >/dev/null 2>/dev/null
then
echo First_Hop_OK
else
ifconfig em0 down && ifconfig em0 up
echo Restored
fi
