how to create a tcp xml external health check.

Hi,

Have you tried to use istats to store the counter?

This is the only way I can see now.

e.g.

#!/bin/sh
 
#
# these arguments supplied automatically for all external pingers:
# $1 = IP (::ffff:nnn.nnn.nnn.nnn notation or hostname)
# $2 = port (decimal, host byte order)
# $3 and higher = additional arguments
#
# $MONITOR_NAME = name of the monitor
#
# In this sample script, $3 is the regular expression
#
 
# Name of the pidfile
pidfile="/var/run/$MONITOR_NAME.$1..$2.pid"
 
# Send signal to the process group to kill our former self and any children
# as external monitors are run with SIGHUP blocked
if [ -f $pidfile ]
then
   kill -9 -`cat $pidfile` > /dev/null 2>&1
fi
 
echo "$$" > $pidfile
 
# Remove the IPv6/IPv4 compatibility prefix
node_ip=`echo $1 | sed 's/::ffff://'`
port=$2
 
# Define istats key to store values
# Each node has a unique counter
istats_key="ltm.monitor ${node_ip}_${port} counter msgID"
 
# Increase value on node counter
istats incr "$istats_key" 1
# Get the current counter value
value=`istats get "$istats_key"`
 
# Keeping value between 1 and 9999 (4 digits)
if [[ $value -eq 0 || $value -gt 9999 ]]; then
    value=1
    istats set "$istats_key" $value
fi
 
# Using the nc utility to get data from the server. 
# Search the data received for the expected expression
echo '011101<?xml version="1.0" encoding="UTF-8"><abc>XXX</abc><MsgID>'$(printf "%04d" $value)'</MsgID>' | /usr/bin/nc $node_ip $port 2> /dev/null | grep -E -i $3 > /dev/null
 
status=$?
if [ $status -eq 0 ]
then
    # Remove the pidfile before the script echoes anything to stdout and is killed by bigd
    rm -f $pidfile
    echo "up"
fi
 
# Remove the pidfile before the script ends
rm -f $pidfile

I hope it helps.