docker nginx reverse proxy 503 Service Temporarily Unavailable

Question

I want to use nginx as reverse proxy for my remote home automation access.

My infrastructure yaml looks like follows:

# /infrastructure/docker-compose.yaml
version: '3'

services:
  proxy:
    image: jwilder/nginx-proxy:alpine
    container_name: proxy
    networks:
      - raspberry_network
    ports:
      - 80:80
      - 443:443
    environment:
      - ENABLE_IPV6=true
      - DEFAULT_HOST=${RASPBERRY_IP}
    volumes:
      - ./proxy/conf.d:/etc/nginx/conf.d
      - ./proxy/vhost.d:/etc/nginx/vhost.d
      - ./proxy/html:/usr/share/nginx/html
      - ./proxy/certs:/etc/nginx/certs
      - /etc/localtime:/etc/localtime:ro
      - /var/run/docker.sock:/tmp/docker.sock:ro
    restart: always

networks:
  raspberry_network:

My yaml containing the app configuration looks like this:

# /apps/docker-compose.yaml

version: '3'

services:
  homeassistant:
    container_name: home-assistant
    image: homeassistant/raspberrypi4-homeassistant:stable
    volumes:
      - ./homeassistant:/config
      - /etc/localtime:/etc/localtime:ro
    environment:
      - 'TZ=Europe/Berlin'
      - 'VIRTUAL_HOST=${HOMEASSISTANT_VIRTUAL_HOST}'
      - 'VIRTUAL_PORT=8123'
    deploy:
      resources:
        limits:
          memory: 250M
    restart: unless-stopped
    networks:
      - infrastructure_raspberry_network
    ports:
      - '8123:8123'

networks:
  infrastructure_raspberry_network:
    external: true

Via portainer I validated that both containers are contected to the same network. However, when accessing my local IP of the raspberry pi 192.168.0.10 I am receiving "503 Service Temporarily Unavailable".

Of course when I try accessing my app via the virtual host domain xxx.xxx.de it neither works.

Any idea what the issue might be? Or any ideas how to further debug this?

Answer 1

1. You need to specify the correct VIRTUAL_HOST in the backends environment variable and make sure that they're on the same network (or docker bridge network)

2. Make sure that any containers that specify VIRTUAL_HOST are running before the nginx-proxy container runs. With docker-compose , this can be achieved by adding to depends_on config of the nginx-proxy container