Simplest proxy to docker swarm services

nginx.conf

# based on https://serverfault.com/questions/291703/dynamic-backends-with-haproxy/292581#292581

server {
    listen       80;
    server_name  *.localtest.me;

    #charset koi8-r;
    #access_log  /var/log/nginx/host.access.log  main;

    resolver 127.0.0.11;

    location / {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $host;

        if ($host ~ (.*?)\.localtest\.me) {
            set $_service $1;
            proxy_pass http://$_service$request_uri;
        }
    }
}