listener.sh

#!/bin/bash

# Listener to be run by root. When user from Cloud Build touches $FILE, root removes it 
# and restarts the service from within the VM.

FILE="/home/rohandash1998/test"

function listen()
{
        if [ -f "$FILE" ]; then
            rm $FILE
            sudo systemctl restart apache2
            sleep 60
        else
            sleep 10
        fi
}

while true
do
    listen
done