haproxy is not rewriting the Host header in subsequent request

[Hudec Peter]

Hi all,

I'm trying to replace the nginx setup with the haprixy which seems to be
more suitable for our purposes.

In our setup there are several development servers hidden behind the HA
PROXY. The development dserver are the copy of the template. On the NGINX
I'm doit Host header rewrite

<client> ---> www04.devel.domain.com ---> nginx ----> www.devel.domain.com
-----> www04.dev.(server)

Each of the devel server is able to handle domain www.devel.domain.com,
the nginx is rewtiting the

Nginx configuration looks like /only relevant parts .../
server {
        server_name www04.devel.domain.com;
        proxy_redirect     off;
        proxy_set_header   Host             www.devel.domain.com;
        proxy_set_header   X-Real-IP        $remote_addr;
        proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto $scheme;


        location / {
                proxy_pass http://backend_domain_www_servers_devel04;
                proxy_redirect http://www.devel.domain.com/ https://$host/;
        }
}

For HAPROXY I tried this

backend devel-web04
        reqrep ^Host:   Host:\ www.devel.domain.com
        rspirep ^(.*)www.devel.domain.com(.*) \1www04.devel.domain.com\2
        server  web04.dev 192.168.30.79:80 maxconn 32


The problem is, that only the first request si rewritten from
www04.devel.domain.com to www.devel.domain.com. All subsequent request did
not pass the rewrite rule.


Please could some figure me out, where is the problem?

        Best regards
                Peter Hudec