Summary

I created this simple example to correct and check the errors that I have in another more complex project. So I've a docker-compose file with 1 web server and 2 app and a nginx conf file.

Please note, that I'm testing it with Docker Quick Start Terminal for Windows 10 Home Edition, but I've tested even on Ubuntu 18.04 and the outcome is the same.

Outcome

Going to: http://192.168.99.100:8080/
Default output:

It works!

The only issue here is with app2, since I'm not able to access app2.

Going to http://192.168.99.100:8080/app2.
Error:

Not Found

The requested URL was not found on this server.

I'm not understanding why I'm not able to do that, and where is the error.

What I've Tried

• Switch the location order, so location /app2 after location /, but nothing changed
• Change the location of location /app2 to location /foo, even here same outcome.
• Change the path related to the previous example, anything different from location / does not works. (e.g. location /bar location /foobar location /test)

• Change location / in order to refer the app2 instead of app1, and it works but in this way I can't reach app1.

  
  location / {
      proxy_pass http://app2:80;
  }
  
  
  location /app1 {
      proxy_pass http://app1:80;
  }
  

Code

docker-compose.yml

version: "3.7"

services:
  web:
    image: nginx:alpine
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf
    ports:
        - 8080:80
    networks:
        - app1_net
        - app2_net

  app1:
      image: httpd:latest
      networks:
        - app1_net

  app2:
      image: httpd:latest
      networks:
        - app2_net

networks:
  app1_net:
  app2_net:

nginx.conf

events {}
http {
    server{
        listen 80;
        listen [::]:80;

        server_name localhost;

        location /app2 {
            proxy_pass http://app2:80;
        }

        location / {
            proxy_pass http://app1:80;
        }
    }
}