HAProxy incase of dynamic backends

[R, Rajkumar (Raj)]

Hi,

In our kubernetes environment, we have dynamic backend services/pods (servers) 
and looking for a way in HAProxy config to resolve it through DNS resolver 
config by using SNI- FQDN.  Attempted below config, which parse fails due to 
'%[req.ssl_sni]' in  'server' entry.  Appreciate your inputs on how this could 
be achieved.

defaults
    log global
    timeout client 50s
    timeout client-fin 50s
    timeout connect 5s
    timeout server 10s
    timeout tunnel 50s

resolvers dns
  nameserver private-0  192.0.2.1:53
  hold valid 1s

listen tcp-0_0_0_0-443
   bind *:443
    mode tcp

    tcp-request inspect-delay 5s
    tcp-request content accept if { req_ssl_hello_type 1 }
    server services %[req.ssl_sni]:443 check resolvers dns resolve-prefer ipv4 
check



thanks,
raj
+918067153382