simple_scripts/Service monitor at master · GeorgeAn/simple_scripts · GitHub

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#!/bin/bash
#GIVE SERVICE NAME TO MONITOR AS ARGUMENT.
#TESTED ON UBUNTU SERVER 12.04

function SendMail() {
         SECS=7200;
	 COUNT=0;

	 if [[ "$1" == "NOT" ]]; then
                FLAG=1
                T_H=${3:11:2};T_M=${3:14:2};T_S=${3:17:2}
         fi

         while [[ 0 -ne $SECS ]]; do
                sleep 1
                SECS=$[$SECS-1]
                COUNT=$((COUNT+1))
		STATUS_=`/etc/init.d/$2 status| grep -oE 'NOT|not'`;
		if [[ "$STATUS_" == "NOT" ]]||[[ "$STATUS_" == "not" ]]; then
                	STATUS_CHECK="NOT"
	        else
			STATUS_CHECK="OK"
		fi


                if [[ "$COUNT" -eq "3" ]]; then
                        if [[ "$STATUS_CHECK" == "NOT" ]]; then
                                echo -e "From:webmaster@globeone.gr\nTo:ganag16@gmail.com\nMIME-Version: 1.0\nContent-Type: text/plain\nSubject: SERVER PROBLEM\n$2 is down\nIt is a good time to panic!"|sendmail -t -i;

				FLAG=2
                        fi
                        if [[ "$STATUS_CHECK" == "OK" ]]&&[[ "FLAG" -eq "1" ]]; then
                                echo -e "From:webmaster@globeone.gr\nTo:ganag16@gmail.com\nMIME-Version: 1.0\nContent-Type: text/plain\nSubject: SERVER RESTARTED\nNothing crucial.\n$2 is back in action!"|sendmail -t -i;


				FLAG=3
                        fi

                fi

		if [[ "$STATUS_CHECK" == "OK" ]];then
			if [[ "FLAG" -eq "2" ]]; then
                        	CURDATE=`date`;
                        	CURT_H=${CURDATE:11:2};CURT_M=${CURDATE:14:2};CURT_S=${CURDATE:17:2};

				if [[ "$T_S" -gt "$CURT_S" ]]; then
				        DOWNT_S=$((60-T_S))
				        CURT_M=$((CURT_M-1))
				else
				        DOWNT_S=$((CURT_S-T_S))
				fi

				if [[ "$T_M" -gt "$CURT_M" ]]; then
        				DOWNT_M=$((60-T_M))
        				CURT_H=$((CURT_H-1))
				else
       					DOWNT_M=$((CURT_M-T_M))
				fi

				if [[ "$T_H" -gt "$CURT_H" ]]; then
        				echo "Wrong arguments!"
					exit 85
				else
        				DOWNT_H=$((CURT_H-T_H))
				fi

				echo -e "From:webmaster@globeone.gr\nTo:ganag16@gmail.com\nMIME-Version: 1.0\nContent-Type: text/plain\nSubject: SERVER PROBLEM RESTORED\nService $2 was down for $DOWNT_H hours, $DOWNT_M mins and $DOWNT_S secs.\nBut thanks to our sysadmin the problems were solved!"|sendmail -t -i;
                        	echo -e "From:webmaster@globeone.gr\nTo:ganag16@gmail.com\nMIME-Version: 1.0\nContent-Type: text/plain\nSubject: SERVER PROBLEM RESTORED\nService $2 was down for $DOWNT_H hours, $DOWNT_M mins and $DOWNT_S secs.\nBut thanks to our sysadmin the problems were solved!"|sendmail -t -i;

				break
			elif [[ "FLAG" -eq "3" ]];then
				break
			fi
                fi
	done

}