On CentOS Certbot / Lets Encrypt uses snap to keep SSL certificates up to date. Is there another method that will keep certificates up to date?
certbot is available on EPEL. Follow these instructions to add the Extra Packages for Enterprise Linux (EPEL) to your system. After that certbot can be installed like any other package with yum install certbot.
The certbot package is then updated along with the other packages on the system when running yum update.