Health monitor to parse Nagios XI REST API call

I ended up creating an external file monitor with the following. Still need to fix the "-k" requirement on the curl command...

In the LTM health monitor, add a variable with the Name of HOST_NAME and the Value of the host's name as seen by Nagios.

This could easily be re-purposed to check any service's status in Nagios...

!/bin/sh

 This script expects the following Name/Value in the LTM monitor and no Arguments are needed
  HOST_NAME  = the monitored host name in Nagios

 remove IPv6/IPv4 compatibility prefix (LTM passes addresses in IPv6 format)
IP=`echo ${1} | sed 's/::ffff://'`
PORT=${2}

PIDFILE="/var/run/`basename ${0}`.${IP}_${PORT}.pid"
 kill of the last instance of this monitor if hung and log current pid
if [ -f $PIDFILE ]
then
   echo "EAV exceeded runtime needed to kill ${IP}:${PORT}" | logger -p local0.error
   kill -9 `cat $PIDFILE` > /dev/null 2>&1
fi
echo "$$" > $PIDFILE

  send request & check for "current_state:0"
    curl -kfNs "https://nagiosserver.local/nagiosxi/api/v1/objects/servicestatus?host_name=${HOST_NAME}&service_description=crond&apikey=[api-key-here]" | grep -i "\"current_state\":\"0\"" 2>&1 > /dev/null

     mark node UP if true
    if [ $? -eq 0 ]
    then
        rm -f $PIDFILE
        echo "UP"
    else
        rm -f $PIDFILE
    fi