This is a two aprt proyect,
first part will have to ID the client (client will have Centos 6.6 or 7)
second part will check remote centos 7 for expiracy date (will do this every hour, cron job is ok)
if activation is expired, it will shut down 3 services.
Freelancer will have to provide script for clean isntallation on both sides (client and server), once it is tested funds will be released