#!/bin/bash

LAST_KERNEL=$( rpm -q --last kernel | cut -d " " -f 1 | cut -d "-" -f 2- | head -1 )
CURRENT_KERNEL=$( uname -r )

if [ $LAST_KERNEL == $CURRENT_KERNEL ] ; then
    logger No kernel updated, no need to reboot.
else
    # == Your stop service script == #
    
    # ===== End of your script ===== #
    logger Kernel updated, trigger to reboot.
    sync; sync; sync;
    reboot
fi