I have a private Website running on a (Web)Server which is accessed via a Reverse Proxy (Apache2) For Testing and other purposes I have an identical 2nd (Web)Server in a different location also accessed via another Reverse Proxy (Apache2)
Both Reverse Proxy Serves running Apache have a unique IP4. So now I would like to add both IP4s to my Domain located at my Domain Hoster (both as A-Record) as Round-Robin
Because I am bad with words - here is a picture
My issue is, that I do not really know how to set up the SSL Certification via Let's Encrypt, so that both servers are having the same certificate. (Currently, the first ReverseProxy as done a normal HTTPs Challenge and created the certificates and I was afraid to run the certbot on the 2nd server again and making the certificate of server1 invalid)
Constraints: I do not want to manually copy the certificate files from ReverseProxy to another.