No error logs!

nginx-proxy/nginx-proxy is returning an HTTP 500 with no traces of errors. It has been very difficult to understand what is going on.

docker-compose.yaml for the backend services:

version: '2.2'
services:
  http-echo:
    image: mendhak/http-https-echo:23
    ports:
      - "8585:8080"
    network_mode: bridge
    environment:
      VIRTUAL_HOST: mydomain.com
      VIRTUAL_PORT: 8585
      LETSENCRYPT_HOST: mydomain.com
      LETSENCRYPT_EMAIL: [e-mail]

docker-compose.yaml for the nginx-proxy and the acme-companion:

version: '2.2'
services:
  nginx-proxy:
    image: nginxproxy/nginx-proxy
    container_name: nginx-proxy
    ports:
      - "80:80"
      - "443:443"
    environment:
      - HSTS=off
    volumes:
      - conf:/etc/nginx/conf.d
      - vhost:/etc/nginx/vhost.d
      - html:/usr/share/nginx/html
      - dhparam:/etc/nginx/dhparam
      - certs:/etc/nginx/certs:ro
      - /var/run/docker.sock:/tmp/docker.sock:ro
    network_mode: bridge

  acme-companion:
    image: nginxproxy/acme-companion
    container_name: nginx-proxy-acme
    volumes_from:
      - nginx-proxy
    volumes:
      - certs:/etc/nginx/certs:rw
      - acme:/etc/acme.sh
      - /var/run/docker.sock:/var/run/docker.sock:ro
    network_mode: bridge
    environment:
      DEFAULT_EMAIL: [e-mail]

volumes:
  conf:
  vhost:
  html:
  dhparam:
  certs:
  acme:

The container related to the image mendhak/http-https-echo:23 is responsible for echoing HTTP requests.

Start all containers above using docker-compose.

Hitting the URL http://mydomain.com:8585 in the browser returns the HTTP echo correctly (it’s bypassing nginx-proxy, accessing the backend container directly, so this service is working fine):

But, hitting the URL https://mydomain.com in the browser returns HTTP 500:

There are no error logs in /var/log/nginx/error.log.

Please let me how to enable error logs. It’s impossible to know what’s going on.

[DatAres37]

The logs are the standard logs of your docker container.

Did you read the docs? You’re not even exposing any ports of your service.

[averri]

I see that the default log level used in the Nginx configuration is notice, as we can see in the /etc/nginx/nginx.conf:

error_log  /var/log/nginx/error.log notice;

Is it possible to change the log level in nginx-proxy?