I have a config file that handles wildcard subdomains like:

server_name ~^(?<user>.+)\.mydomain\.com$;

Then the variable $user contains the subdomain. The problem, is that I also need to dynamically set the port that fastcgi passes PHP work too since each user has their own PHP-FPM pool.

fastcgi_pass php1.local.mydomain.com:XXXX;

Is there a way to setup a hashmap of something like:

user fastcgi-port
-------- ---------------
bob 9001
john 9002
kelly 9003

So that nginx can do some magic like:

set $user_port = map($user);

fastcgi_pass php1.local.mydomain.com:$user_port;