I need to set up haproxy 1.8.3 as a loadbalancer for several nginx webservers (1.13.x). The haproxy will be set up to support h2 connections. I am undecided if it is a good idea to setup nginx for h2 also. I understand that haproxy will be able to talk to nginx more efficiently, but there is also a downside for the h2 handshake and more complicated protocol in contrast to a simple unencrypted http connection. The content I transfer between haproxy and nginx is absolutely public, so there is no added value or security if I encrypt it.
Is it advisable to set up h2 between the two or not ? Criteria would be "less CPU usage" or "less connections between the two components" or even "faster transfer of data between nginx and haproxy" I have not yet come to a conclusion. I understand that for a detailled answer you would need to know more about the servers and type / amount of content transferred. But I am hoping for some general guidance here.
