Script to auto-shutdown UNRAID after x minutes of power loss

shutdown-after-powerloss.sh

#!/bin/bash

#set which hosts will be checked 
CHECKHOST1="10.0.0.100"
CHECKHOST2="10.0.0.100"
MAX_FAILS=10
FAILCOUNT=0
GLOBALFAILCOUNT=0
PERIOD=30

#start main loop
echo "Power failure monitoring started @ $(date)" >> /mnt/disks/ua_docker/powerlog.log

while :
do

echo "PowerLoss Detection : FAILURE= $FAILCOUNT/$MAX_FAILS ($CHECKHOST1 $CHECKHOST2) TotalErros= $GLOBALFAILCOUNT"

if [ "$FAILCOUNT" -gt "0" ]
then
  beep -f $((200*$FAILCOUNT)) -r $FAILCOUNT
fi

if [ "$FAILCOUNT" -gt "$MAX_FAILS" ]
then
    echo "We reached Max Failures , System Shutdown will start after notifications are fired"
/usr/local/emhttp/webGui/scripts/notify -e "Power failure detected" -s "Power seems to be offline" -d "Power failure" -i "alert" -m "Power failure detected, poweroff is in order"
    echo "Shutdown due to power failure $(date)" >> /mnt/disks/ua_docker/powerlog.log
    sleep 2
    /sbin/poweroff
fi
sleep $PERIOD

echo "$(date) - Running PowerLoss Detection Routine, trying to reach $CHECKHOST1"
var=$(ping $CHECKHOST1 -c 5 -W 5 | grep "0 received")

if [ -z "$var" ]
then
   if [ "$FAILCOUNT" -eq "0" ]; then
      echo "$(date) - power is A-OK"
   else
      echo "$(date) - power is BACK sending notification"
/usr/local/emhttp/webGui/scripts/notify -e "Power is back" -s "Power returned" -d "Power is back" -i "normal" -m "Power is back after $FAILCOUNT checks"

     beep -f 784 -r 3 -l 100
     sleep .1
     beep -f 784 -l 600
     beep -f 622 -l 600
     beep -f 698 -l 600
     beep -f 784 -l 200
     sleep .2
     beep -f 698 -l 200
     beep -f 784 -l 800

   fi
      FAILCOUNT=0
else
      echo "$var"
      echo "$(date) - we couldn't reach $CHECKHOST1"
      echo "$(date) - Trying $CHECKHOST2" 
      #if we can't reach the 2nd host then we're in trouble increment a counter
      var=$(ping $CHECKHOST2 -c 5 -W 5 | grep "0 received")
      if [ -z "$var" ]
      then
       echo "$var"
       echo "we could reach $CHECKHOST2 , standing by..."

      else
       echo "$var"
       echo "$(date) - we couldn't reach $CHECKHOST2"
       FAILCOUNT=$((FAILCOUNT + 1))
       GLOBALFAILCOUNT=$((GLOBALFAILCOUNT+ 1))
      fi

fi

done