How to redirect math only subdomains in HAProxy

Help!
1

Hello

I have following the docs at https://www.haproxy.com/documentation/aloha/9-0/traffic-management/lb-layer7/acls/. And try to setup subdomain and main domain but the request only use the backend domain in this case the backend gsviec. Here my config

acl host_gsviec  hdr_end(host) -i gsviec.com
acl host_note_gsviec  hdr_end(host) -i note.gsviec.com
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use_backend note_gsviec if host_note_gsviec
use_backend gsviec if host_gsviec

backend gsviec
        balance leastconn
        cookie SERVERID insert indirect
        option httpclose
        option forwardfor
        server app 127.0.0.1:8000 cookie A check

backend host_note_gsviec
        balance leastconn
        option httpclose
        option forwardfor
        cookie JSESSIONID prefix
        server node1 127.0.0.1:7000 cookie A check
backend lackky

I have also change hdr_dom(host) but it did not work too
Anyone have same the problem?

2

You are configured to use a backend that you does not exists (note_gsviec != host_note_gsviec):

use_backend note_gsviec if host_note_gsviec
backend host_note_gsviec
3

Hi

I have just update, it’s do not work correct and I also restart haproxy too

4

Other than fixing the wrong backend reference you also need to fix the fetch to access the host header, which you already noticed in the first post.

So replace:

use_backend note_gsviec if host_note_gsviec

with

use_backend host_note_gsviec if host_note_gsviec

and replace:

acl host_gsviec  hdr_end(host) -i gsviec.com
acl host_note_gsviec  hdr_end(host) -i note.gsviec.com

with

acl host_gsviec  hdr_dom(host) -i gsviec.com
acl host_note_gsviec  hdr_dom(host) -i note.gsviec.com
5

Thanks you. It’s work now