Hello!
I am testing haproxy version 1.9.4 on Ubuntu 18.04.
With the "option http-use-htx", haproxy shows a strange behaviour when
the real server is IIS and if the users' browsers try to do a POST.
A configuration similar to the following lets the GETs work properly,
but the POST fails after the server timeout (session state "SD" in
haproxy logs):
listen tesi-http
bind 10.64.44.112:443 name HTTPS ssl crt XXX
option http-use-htx
server vxws142a-82 11.22.33.44:82
If the connection to the real server is closed, all GETs and POSTs work
listen tesi-http
bind 10.64.44.112:443 name HTTPS ssl crt XXX
option http-use-htx
option http-server-close
server vxws142a-82 11.22.33.44:82
In other words, it seems that the "option http-use-htx" only works
together with "http-server-close" with this real server.
Notes:
. The behaviour does not change if "alpn h2,http/1.1" is added/removed
from the "bind" line.
. The behaviour does not change if the browser is firefox or IE
. With tcpdump on the haproxy node I was not able to understand who is
waiting for whom :-)
. I am not sure that I can install wireshark on the real server.
Can someone please suggest me what to look for in the IIS or in the
haproxy configuration?
Thank you
.marcoc
