Multiple Sub-Domains on a single server. Docker + NGINX @ EC2

Question

I have multiple NGNIX-uWSGI based Django Applications deployed using Docker and hosted in EC2 (currently at different ports like 81, 82, ...). Now I wish to add in sub-domains to this such that sub1.domain.com and sub2.domain.com will both work from the same EC2 instance.

I am fine with multiple ports, BUT they dont work via DNS settings. sub1.domain.com -> 1.2.3.4:81 sub2.domain.com -> 1.2.3.4:82

What I cannot do

1. Multiple IPs ref: allocation of a new ip for each deployed sub-domain is not possible.

2. NGINX Proxy ref: This looks like the ideal solution BUT this is not maintained by an org like Docker or NGINX, so I am un-sure of the security and reliability.

What I am considering:

1. I am considering to write my own NGINX reverse proxy, similar to Apache Multiple Sub Domains With One IP Address BUT then the flow is will via multiple proxies since already there is an NGINX-uWSGI proxy via the Tech Stack

Answer 1

you can use nginx upstream

upstream backend {
    server backend1.example.com       weight=5;
    server backend2.example.com:8080;
    server unix:/tmp/backend3;

    server backup1.example.com:8080   backup;
    server backup2.example.com:8080   backup;
}

server {

  server_name sub.test.com www.sub.test.com;

    location / {
        proxy_pass http://backend;
    }
}