Simple script to check if a webservice is running and restarts a service if it is not with logging

check_web.sh

#!/usr/local/bin/bash
# Simple script to check if a webservice is running and restarts a service if it is not.
# Logfile that only grows upon status change.
# PATH added to avoid cron issues.
#
# mikl0s @ github.com 2018 - Written for FreeBSD/FreeNAS
#
PATH="/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/root/bin"

URL="http://192.168.1.13:7878/"
SERVICE="radarr"
LOGFILE="/var/log/radarr_check.log"

DATE=`date "+%F %T"`

function check {
	if [ $CURL -eq 0 ]
	then
		if [ $LAST -eq 0 ]
		then
			echo $DATE - $SERVICE running - Curl exit code: $CURL >> $LOGFILE
		fi
		exit 0
	fi	
	if [ $CURL -eq 7 ]
	then
		echo $DATE - $SERVICE down - restarting >> $LOGFILE
		service $SERVICE restart > /dev/null 2>&1
		exit 0
	fi
}
curl -s -o "/dev/null" $URL
CURL=$?
LAST=`tail -1 $LOGFILE|grep running|wc -l`
check