no live upstreams while connecting to upstream. 502 Bad Gateway

[Di-Mon]

Hi everyone,

I am trying to get a container working behind an nginx-proxy, but I am getting 502 Bad Gateway when running container with docker-container.yml

when I am running like this, everything working perfectly:

docker run \
-e VIRTUAL_HOST=domain.com \
-v 'pwd'/app:/usr/share/nginx/html \
-p 8080:80 \
--name domain.com \
nginx:alpine

but when I am launching similar config with docker compose up I get 502 Bad Gateway error when opening a domain in browser.
Here is my docker-container.yml

version: '3'
services:
  web:
    image: nginx:alpine
    container_name: domain.com
    environment:
    - VIRTUAL_HOST=domain.com
    volumes:
    - ./app:/usr/share/nginx/html
    ports:
      - "8080:80"

In logs I see following error:
[error] 123#123: *66 no live upstreams while connecting to upstream, client: 52.47.45.89, server: domain.com, request: "GET / HTTP/1.1", upstream: "http://domain.com/", host: "domain.com"

What am I missing?

[buchdag]

Hi. Please post your whole proxy config (cmd line or compose file used to start the proxy container plus any additional config), not just the proxied container.

I suspect that your are either using two different compose files for the proxy and the proxied container or starting the proxy via cmd line and the proxied container via Docker Compose, which result in the two containers being connected to two different networks, and as the documentation mention this does not work.

[Di-Mon]

hi. Sorry I missed your reply for some reason. And you are right - this is how I do it - containers being launched with separate compose files. I will redo my set up and if the problem still occurs, will msg here. Thanks for the help