this is obsolete doc -- see http://doc.nethence.com/ instead

Maintaining init.d vs systemd scripts 

http://pbraun.nethence.com/unix/sysutils_linux/redhat_rhel7.html 

http://pbraun.nethence.com/unix/sysutils_linux/systemd.html 

On RHEL7, you can still create old fashioned init.d scripts and link them to systemd, 

  service=servicename 

cd /etc/init.d/

cat > $service <<EOF9 # escaping $1 and $?

#!/bin/bash

#

# chkconfig: 2345 99 01

# description: $service init script

#

# Source function library.

. /etc/init.d/functions

start() {

        echo -n "Starting $service: "

command_line_start_service 

        touch /var/lock/subsys/$service

        return 0

}

status() {

command_line_status_service | grep -v /sbin/service | grep -v init.d 

}

stop() {

        echo -n "Shutting down $service "

command_line_stop_service 

        rm -f /var/lock/subsys/$service

        return 0

}

case "\$1" in

    start)

        start

        ;;

    stop)

        stop

        ;;

    status)

        status

        #[[ -f /var/run/davmail.pid ]] && cat /var/run/davmail.pid || echo not running or started by this init script

        ;;

    restart)

        stop

        start

        ;;

    reload)

        echo reload feature not available, use restart

        ;;

    *)

        echo "Usage: <servicename> {start|stop|status|restart]"

        exit 1

        ;;

esac

exit \$?

EOF9

chmod +x $service

chkconfig --add $service

chkconfig $service on

chkconfig --list | grep $service

unset service

Ref. skeleton and documentation available at /usr/share/doc/initscripts-9.03.49/sysvinitfiles 

You can now use init.d, 

  service $service stop / start / restart / status 

also try with systemd, 

  systemctl status $service 

  systemctl restart $service 

Clean-up variables, 

unset service

References 

RHEL7: How to get started with Systemd.: http://www.certdepot.net/rhel7-get-started-systemd/ 

8.2. MANAGING SYSTEM SERVICES: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/System_Administrators_Guide/sect-Managing_Services_with_systemd-Services.html