Combine Chain + Key file to use with HAProxy. sudo cat /etc/letsencrypt/live/domain.com/fullchain.pem /etc/letsencrypt/live/domain.com/privkey.pem > /etc/ssl/private/domain.com.pem. In another article where we setup Varnish to listen on Port 80 and Apache was listening on 443 will now be replaced with HAProxy.
LetsEncrypt with HAProxy This is a video from the Scaling Laravel course's Load Balancing module. Part of what I wanted to cover was how to use SSL certificates with a HAProxy load balancer. LetsEncrypt (certbot) is great for this, since we can get a free and trusted SSL certificate.