We wrote a certbot plugin for HAProxy:
Forum topic: Implemented HAProxy plugin
Source: https://github.com/greenhost/certbot-haproxy
As our readme states: it can be useful to you in the following cases:
- If you use HAProxy and have several domains for which you want to enable Let’s Encrypt certificates.
- If you have a shared hosting platform that uses HAProxy to redirect to your client’s websites.
- Actually any case in which you want to automatically restart HAProxy after you request a new certificate.