#!/usr/bin/env bash

if [ -z ${1} ] || [ -z ${2} ]; then 
	echo "USAGE: ${0} <IP-TO-MONITOR> <PIVOT-DAYS>"
	exit 1
fi

PIVOTDAYS=35 # how often should the failover be checked?(in days)
IP_TO_MONITOR=${1}
FAILOVER_IP=$(ip addr sh | grep -v "127.0.0.1" | grep "inet " | cut -d/ -f1 | awk '{print $2}' | grep -Fx ${IP_TO_MONITOR}) 

if [ -z "${FAILOVER_IP}" ];then
	echo "[OK] Host is in Backup mode"
	exit 0
fi

HASHFILE="/tmp/$(echo "${IP_TO_MONITOR}" | md5sum | cut -f1 -d' ')"

touch ${HASHFILE}

if test $(find ${HASHFILE} -ctime +${PIVOTDAYS})
then
	echo "[CRIT] it is time to check the failover!"
	exit 2
else
    echo "[OK] still got some time"
    exit 0
fi