View source for HAProxy Routing Among Two Classes of Backends Based on Request Structure

=External=

* https://seanmcgary.com/posts/haproxy---route-by-domain-name
* https://stackoverflow.com/questions/20606544/haproxy-url-based-routing-with-load-balancing

=Internal=

* [[HAProxy_Configuration#Subjects|HAProxy Configuration]]

=Overview=

 frontend openshift
 
        ...
 
        # Define ACLs based on the "host" header
 
        acl api_acl hdr(host) -i master.openshift.novaordis.io
 
        # Direct traffic
        use_backend api_backend if api_acl
        default_backend app_backend
 
 backend api_backend
    ...
    server      master0 192.168.122.24:443 check
 
 backend app_backend
    ...
    server      infranode 192.168.122.25:443 check