Monitor always show nodes up even if down ...

Hi all, I'm wondering what's wrong in the external monitor I have created. Target is to monitor NTP server status.

I get the correct status (UP, DOWN) when I run the batch via SSH on the F5 VM

It DOESN'T run via the MONITOR ... status is always up and I get the message "exceeded monitor interval" in the LTM

I spent hours on it without finding the error ... Sure I miss something ... help ! ... please

thanks

Here is the code :

!/bin/bash
 target is to monitor the NTP appliances and to log their status

 Log debug to local0.debug (/var/log/ltm)?
 Check if a variable named DEBUG exists from the monitor definition
if ! [ -n "$DEBUG" ]
then
    If the monitor config didn't specify debug, enable/disable it here
   DEBUG=1
fi

 Remove IPv6/IPv4 compatibility prefix (LTM passes addresses in IPv6 format)
IP=`echo $1 | sed 's/::ffff://'`

 Save the port for use in the shell command
PORT=$2

 Check if there is a prior instance of the monitor running
pidfile="/var/run/`basename $0`.$IP.$PORT.pid"
if [ -f $pidfile ]
then
   kill -9 `cat $pidfile` > /dev/null 2>&1
   echo "NTP server $IP `basename $0`: exceeded monitor interval, needed to kill ${IP}:${PORT} with PID `cat $pidfile`" | logger -p local0.error
fi

 Add the current PID to the pidfile
echo "$$" > $pidfile

 NTP status
command="ntpdate -q $IP"
eval "$command  2>&1 > /dev/null"

 if the NTP server is reachable
if [ $? -eq 0 ]
then
    Extract the offset (before the floating point)
   result=$(eval $command)
   arr=($result)
   offset=${arr[5]}
   declare -i offset=${offset%%.*,}
    if offset < 1 sec then node is UP
   if [ $offset -gt -1 ] && [ $offset -le 1 ]
   then
      rm -f $pidfile
      echo "UP"
   else
      rm -f $pidfile
      if [ $DEBUG -eq 1 ]; then echo "NTP server $IP out of sync offset=$offset" | logger -p local0.debug; fi
   fi
else
   rm -f $pidfile
   if [ $DEBUG -eq 1 ]; then echo "NTP server $IP not reachable" | logger -p local0.debug; fi
fi