Linux USES Crontab to periodically monitor the way Tomcat applications are maintained

Monitoring application interface: news interface, weather interface
Solution: automatically restart Tomcat when the application interface is not available, and send an alert email to the relevant personnel

#!/bin/bash
#---------------------------------------------------------
#  Function description: 
#	 Monitor the specified HTTP Whether the service is available, and restart immediately if not Tomcat
#
#  Instructions: 
#	1.  Place this script in /home/opentsp/crontab/ Directory. 
#	2.  Modify script execution right to be executable. 
#	3.  Add to timed task, timed execution time (recommended as 20 Minutes) 
#	4.  Modify the email sender information list (email to the relevant person when the service restarts) 
#                    -  Zhou Lingfei (2014-08-13)
#---------------------------------------------------------
export LC_ALL=zh_CN.UTF-8

# Website address and parameters 
SERVER_NAME=" Interesting driving cloud interface service "
URL_2="http://127.0.0.1/get_rss_news?p=%7b%27chId%27:%27TIYU%27%7d"
KeyWorld_2='<title>'
URL_3="http://127.0.0.1/get_json_weather?p=%7blon:116.407617,lat:39.993956,date:1%7d"
KeyWorld_3='temperature'

# Mailing list 
mail_ary=(
xxxxxxxxx@navinfo.com
xxxxxxxxx@navinfo.com
xxxxxxxxx@navinfo.com
)

# The interface calls the failed handler 
function doFail(){
	local ipinfo=$(ifconfig |sed -n '2p'|awk '{print substr($2,6)}');
	#  Send E-mail 
	for _v in ${mail_ary[*]} ; do
		echo "[$SERVER_NAME  abnormal ] - [$(date -d "0 min" +"%Y-%m-%d %H:%M:%S")] - [ Request the address : $1] - [ Request return code : $2]" | mail -s ${ipinfo} Service exceptions  ${_v}
	done
	#  Written to the log 
	echo "[ERROR] - [$(date -d "0 min" +"%Y-%m-%d %H:%M:%S")] -  Return code [$2] -  restart Tomcat service " >> detect-http.log
	#  Shut down Tomcat
	sh /home/opentsp/crontab/ibr-shutdown.sh
	exit;
}

# Request timeout Settings 
TIME_OUT=40
function doCheck(){
	local URL_X=$1;
	local KeyWorld_X=$2;
	HTTP_STATUS_CODE=`curl -m $TIME_OUT -o /dev/null -s -w "%{http_code}" "${URL_X}"`
	if [ $HTTP_STATUS_CODE != 200 ];then
		# The request failed 
		echo "-> Fail -  Return code ${HTTP_STATUS_CODE}";
		doFail ${URL_X} ${HTTP_STATUS_CODE};
	else
		# The server responds normally and checks the returned content 
		if curl -m ${TIME_OUT} -s ${URL_X} | grep -q ${KeyWorld_X};then
			echo "-> SUCCESS";
		else
			echo "->> Fail";
			#  Returns content error handling 
			doFail ${URL_X} ${HTTP_STATUS_CODE};
		fi
	fi
}

#
# check  -  news 
doCheck ${URL_2} ${KeyWorld_2}
# check  -  The weather 
doCheck ${URL_3} ${KeyWorld_3}

You can put the above code into the timing task of Linux. The recommended timing task time is once every 20 minutes.