Haproxy 2.0.5 httpchk http/2 backend

@czechsys wrote:

Hello,

i am testing using http/2 on backend side. So on ssl backend:

option httpchk HEAD / HTTP/1.1\r\nHost:\ serverA.domain.fqdn\r\n\User-Agent:\ serverA
server serverA ipA:443 check ssl verify none maxconn 1000 alpn h2,http/1.1

This works, if nginx has only http/1.1 enabled.
When i change to

option httpchk HEAD / HTTP/2.0\r\nHost:\ serverA.domain.fqdn\r\n\User-Agent:\ serverA

it still works.

But, when i enable “alpn http2” on nginx side, haproxy fails to checks with L7RSP. What’s correct way to check via http/2 or better way (i am checking working php/source codes availability too). Tested with all headers lowercase and failed too.

Thanks

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