Quasar SSR app in docker container: connection refused

Boris

Hi!
I am confused. My quasar app is built in ssr mode and put in a docker container. It works fine locally, but when I start it on server - nginx shows bad gateway 502. Please help me to understand what am I doing wrong.
here is docker-compose:

...
nginx:
  image: nginx:1.17-alpine
  container_name: webserver
  restart: unless-stopped
  tty: true
  ports:
    - "80:80"
    - "443:443"
  volumes:
    - ./:/var/www
    - ./config/nginx/nginx.conf:/etc/nginx/nginx.conf
    - /root/.acme.sh/amenu.ru:/etc/acme.sh/amenu.ru
    - /etc/conf.ddhparam.pem:/etc/nginx/conf.ddhparam.pem
  links:
    - front
  networks:
    - app-network
  depends_on:
    - front

#Frontend
front:
  build: 
    context: ./myapp/
    dockerfile: Dockerfile
  container_name: front
  restart: unless-stopped
  tty: true
  ports:
    - "4000:3000"
  networks:
    - app-network
...

Dockerfile:

FROM node:14-alpine as build-stage
WORKDIR /app
COPY package*.json ./
RUN npm install && npm install -g @quasar/cli
COPY . .
RUN quasar build -m ssr

# этап production (production-stage)
FROM node:14-alpine as production-stage
WORKDIR /usr/share/www
COPY --from=build-stage /app/dist/ssr ./
RUN npm install
EXPOSE 3000
CMD ["node", "index.js"]

nginx.conf

#user www-data;
pid /run/nginx.pid;
worker_processes auto;
worker_rlimit_nofile 65535;

events {
	multi_accept on;
	worker_connections 65535;
}

http {
	charset utf-8;
	sendfile on;
	tcp_nopush on;
	tcp_nodelay on;
	server_tokens off;
	log_not_found off;
	types_hash_max_size 2048;
	client_max_body_size 16M;

	# MIME
	include mime.types;
	default_type application/octet-stream;

	# logging
	access_log /var/log/nginx/access.log;
	error_log /var/log/nginx/error.log warn;

	server {
		listen 80;
		server_name .amenu.ru;
		location / {
			proxy_pass http://front:4000;
			proxy_http_version 1.1;
			proxy_set_header Upgrade $http_upgrade;
			proxy_set_header Connection 'upgrade';
			proxy_set_header Host $host;
			proxy_cache_bypass $http_upgrade;
		}
	}
}

nginx log:

*1 connect() failed (111: Connection refused) while connecting to upstream, client: 178.155.5.107, server: example.com, request: "GET /auth HTTP/1.1", upstream: "http://172.24.0.3:4000/auth", host: "example.com"
178.155.5.107 - - [22/May/2020:09:40:23 +0000] "GET /auth HTTP/1.1" 502 150 "-" "....."

Boris

Found it. It was a stupid mistake but it cost me a few hours of research. So here it is: nginx proxy_pass http://front:4000; should be proxy_pass http://front:3000; instead.
Which means that althow docker exposes port 4000 OUTSIDE it still maps to 3000 inside docker’s app-network. Counter intuitive to me.

PeterQF

Hi @Boris ,
I use Lando for my dev docker and it works fine but when i reload my page in browser i get Error: connect ECONNREFUSED 127.0.0.1:80

I think this is a SSR problem. any idea how to solve this?

Bers regards
/Peter Sweden

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Quasar SSR app in docker container: connection refused