I have a local setup that uses Docker and Nginx. It used to use port 80 but recently (non-root user related) it changed to port 8080. However, it still seems to use port 80 by default. If I map port 80:8080 then the containers are reached. However, if containers need to communicate between them, it will use port 80 and therefore, not reach eachother.

Here’s some more information:

docker-compose.yaml

  build:
    args: 
      nginx_config_file: nginx.conf
  ports:
    - "8000:8080" (also tried with 8080, 80:8000)

nginx.conf

worker_processes 1;
 
events { worker_connections 1024; }
 
http {
    proxy_redirect     off;    
    proxy_set_header   Host $host;
    proxy_set_header   X-Real-IP $remote_addr;
    proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header   X-Forwarded-Host $server_name;
    proxy_connect_timeout       300;
    proxy_send_timeout          300;
    proxy_read_timeout          300;
    send_timeout                300; 
    fastcgi_read_timeout        300;

    sendfile on;

    server {
        listen 8080;

        client_max_body_size 10M;
        access_log off;
        
        server_name         "~^([w-]+).[w]+.[w]+.myserver.local$";
        set                 $tenant $1;
        
        location /access-identity/ {
            rewrite             ^/([^/]+)/(.*) /$2 break;   
            proxy_set_header    Service $1;
            proxy_set_header    Tenant $tenant;
            proxy_pass          http://service-name:8080;
        }

Snapshot of docker ps

How can I make sure that port 8080 is always used?