Stick on url_param

Help!
1

Hello. I would like to ask if it is possible to stick to individual server based on url_param?

I have HAProxy load balancer and couple of proxies as a backend. I would like to stick to one of the backend proxies if the url_param is matching with one stored in stick table.

I have config file:

frontend testfrontend
        bind IP:PORT
        default_backend proxies
backend proxies
        stick-table type string size 1m expire 1h
        stick on url_param(session_id) table proxies
        stick store-request url_param(session_id) table proxies
        http-request set-uri '%[url,regsub("^(.*)(&|\?)session_id[^&]*(?:&|$)(.*)",\1\2\3)]'

        # Hosts
        server host1 IP:PORT check
        server host2 IP:PORT check
        server host3 IP:PORT check
        server host4 IP:PORT check

It should now stick to session on matching url param but it doesn’t and instead it is cycling through proxies.

2

The issue here were in link definition. As the front-end isn’t secured by SSL cert so it can handle only insecure traffic (http).

The working config:

frontend frontend
        bind localIP:Port
        stick-table type string size 1m expire 1h
        acl has_session_id url_param(session_id) -m found
        use_backend proxies if has_session_id

backend proxies
        stick on url_param(session_id) table frontend
        stick store-request url_param(session_id) table frontend

        # Hosts
        server host1 IP:PORT check
        server host2 IP:PORT check
        server host3 IP:PORT check
        server host4 IP:PORT check

it only works on insecure connections: curl -x IP:PORT "http://HOSTNAME.com?session_id=123"