Docker nginx reverse proxy 502 error on fastcgi

Question

I'm trying to build multiwebsite docker server.

I want to have one container for proxy and others for websites. Also I want to use fastcgi due to better performance.

I'm using jwilder/nginx-proxy

PROBLEM: setting fastcgi (- VIRTUAL_PROTO=fastcgi) causing 502 Bad Gateway error:

2017/12/21 22:06:20 [error] 5#5: *24 connect() failed (111: Connection refused) while connecting to upstream, 
client: 77.X3.38.17, server: domain.tdl, request: "GET / HTTP/2.0", upstream: "fastcgi://172.18.0.2:9000", host: "domain.tdl"

WEBSITE CONTAINER

version: "3"
services:
   test:
     image: richarvey/nginx-php-fpm:latest
     volumes:
       - /srv/www/domain.tdl/data:/var/www/html
     expose:
       - 80
       - 443
     restart: always
     environment:
       VIRTUAL_HOST: domain.tdl
       VIRTUAL_PROTO: fastcgi
       VIRTUAL_PORT: 9000
       VIRTUAL_ROOT: /var/www/html
     container_name: test
networks:
  default:
    external:
      name: nginx-proxy

NGINX-PROXY COINTAINER

version: '3'
services:
  nginx:
    image: nginx
    labels:
      com.github.jrcs.letsencrypt_nginx_proxy_companion.nginx_proxy: "true"
    container_name: nginx
    restart: unless-stopped
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - /srv/www/nginx-proxy/conf.d:/etc/nginx/conf.d
      - /srv/www/nginx-proxy/vhost.d:/etc/nginx/vhost.d
      - /srv/www/nginx-proxy/html:/usr/share/nginx/html
      - /srv/www/nginx-proxy/certs:/etc/nginx/certs:ro
  nginx-gen:
    image: jwilder/docker-gen
    command: -notify-sighup nginx -watch -wait 5s:30s /etc/docker-gen/templates/nginx.tmpl /etc/nginx/conf.d/default.conf
    container_name: nginx-gen
    restart: unless-stopped
    volumes:
      - /srv/www/nginx-proxy/conf.d:/etc/nginx/conf.d
      - /srv/www/nginx-proxy/vhost.d:/etc/nginx/vhost.d
      - /srv/www/nginx-proxy/html:/usr/share/nginx/html
      - /srv/www/nginx-proxy/certs:/etc/nginx/certs:ro
      - /var/run/docker.sock:/tmp/docker.sock:ro
      - /srv/www/nginx-proxy/nginx.tmpl:/etc/docker-gen/templates/nginx.tmpl:ro

  nginx-letsencrypt:
    image: jrcs/letsencrypt-nginx-proxy-companion
    container_name: nginx-letsencrypt
    restart: unless-stopped
    volumes:
      - /srv/www/nginx-proxy/conf.d:/etc/nginx/conf.d
      - /srv/www/nginx-proxy/vhost.d:/etc/nginx/vhost.d
      - /srv/www/nginx-proxy/html:/usr/share/nginx/html
      - /srv/www/nginx-proxy/certs:/etc/nginx/certs:rw
      - /var/run/docker.sock:/var/run/docker.sock:ro
    environment:
      NGINX_DOCKER_GEN_CONTAINER: "nginx-gen"
      NGINX_PROXY_CONTAINER: "nginx"

networks:
  default:
    external:
      name: nginx-proxy

NGINX CONFIG FILE FROM NGINX-PROXY CONTAINER

# domain.tdl
upstream domain.tdl {
                                ## Can be connect with "nginx-proxy" network
                        # test
                        server 172.18.0.2:9000;
}
server {
        server_name domain.tdl;
        listen 80 ;
        access_log /var/log/nginx/access.log vhost;
        return 301 https://$host$request_uri;
}
server {
        server_name domain.tdl;
        listen 443 ssl http2 ;
        access_log /var/log/nginx/access.log vhost;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_ciphers 'ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:!DSS';
        ssl_prefer_server_ciphers on;
        ssl_session_timeout 5m;
        ssl_session_cache shared:SSL:50m;
        ssl_session_tickets off;
        ssl_certificate /etc/nginx/certs/domain.tdl.crt;
        ssl_certificate_key /etc/nginx/certs/domain.tdl.key;
        ssl_dhparam /etc/nginx/certs/domain.tdl.dhparam.pem;
        add_header Strict-Transport-Security "max-age=31536000";
        include /etc/nginx/vhost.d/default;
        location / {
                root   /var/www/html;
                include conf.d/fastcgi.conf;
                fastcgi_pass domain.tdl;
            }
 }

Why my nginx-proxy container can not see my website? Did I messed up something with ports?

Answer 1

In your WEBSITE CONTAINER docker-compose configuration file, you have set the virtual port to VIRTUAL_PORT: 9000, which is wrong, because you have exposed only the ports 80 and 443.
You just need to make sure that you set the correct VIRTUAL_PORT (80 or 443), or in your case you can also remove the environment variable VIRTUAL_PORT, as its default is 80.

Something like this:

version: "3"
services:
   test:
     image: richarvey/nginx-php-fpm:latest
     volumes:
       - /srv/www/domain.tdl/data:/var/www/html
     expose:
       - 80
       - 443
     restart: always
     environment:
       VIRTUAL_HOST: domain.tdl
       VIRTUAL_PROTO: fastcgi
       VIRTUAL_ROOT: /var/www/html
     container_name: test
networks:
  default:
    external:
      name: nginx-proxy