Rewrite host address of backend server

jonathan.young

Hi,

With HAProxy, I am trying to write a rule that changes the address like so:

https://abc-test.example.com to http://def-test.example.com

My frontend handles the https and I have an ACL that checks the URL starts with 'abc'. If so, it passes it to a backend:

backend test_ipvANY
        mode                    http
        id                      126
        log                     global
        errorfile                       503 /var/etc/haproxy/errorfile_test_ipvANY_503_test
        timeout connect         30000
        timeout server          30000
        retries                 3
        acl                     sw_start        var(txn.txnhost) -m sub -i abc-
        http-request set-var(txn.txnhost) hdr(host)
        http-request set-uri %[req.hdr(host),regsub(abc-,def-,g)]  if  sw_start
        server                  xyz-test.example.com 10.1.102.24:80 id 127 check inter 1000

Unfortunately, I get back the error:

File Not Found

URI: def-test.example.com
Method: GET
Arguments: 0

Can anyone tell me where I am going wrong? I realise that my backend server address is not the same as the one set in http-request set-uri but then I can't add wildcards to the backend server so I just created a dummy. Am I going about this the right way?

Thanks

michmoor

@jonathan-young you need a redirection rule - http-request redirect along with a conditional i think would help.

http-request redirect location def-test.example.com code 302 if { hdr(host) -i  abc-test.example.com