Haproxy: convert http1.1 request from the client to http2 on the backend side
For example, you are using this sample config And get an error: It happens because your backend server uses only h2 (http2) and due to this thread https://www.mail-archive.com/haproxy@formilux.org/msg43261.html you should set the “:authority” pseudo-header It can be done by adding ‘set-uri’ in the config