Dockerized NGINX: host not found in upstream “odoo:8069”

Question

I am learning NGINX Reverse Proxy from https://www.freecodecamp.org/news/docker-nginx-letsencrypt-easy-secure-reverse-proxy-40165ba3aee2/

I use dockerized NGINX. My end goal is to host Odoo with HTTPS. Right now, I am learning how to reverse proxy (Odoo use port 8069, e.g. 127.0.0.1:8069 to access Odoo instead of 127.0.0.1)

I understand the concept behind Proxy and Reverse Proxy but I still have not figured out about the technical part such as upstream. I am actually curious why the article require upstream (article related to reverse proxy I seen on on stackoverflow did not use upstream)

Expected result:

By visiting example.com, reverse proxy will sending request (by user) coming from example.com to 127.0.0.1:8069

Actual result:

NGINX container commit suicide.

sudo docker-compose up reverse output

Starting reverse ... done
Attaching to reverse
reverse    | 2020/04/22 14:04:05 [emerg] 1#1: host not found in upstream "odoo:8069" in /etc/nginx/conf.d/sites-enabled/odoo.conf:2
reverse    | nginx: [emerg] host not found in upstream "odoo:8069" in /etc/nginx/conf.d/sites-enabled/odoo.conf:2
reverse exited with code 1

cat /etc/nginx/conf.d/sites-available/odoo.conf output

upstream odoo {
  server        odoo:8069;
}

server {
  listen        80;
  server_name   example.com;

  location / {
    proxy_pass  http://odoo;
  }
}

---- Update as requested by @user2932688

cat docker-compose.yml output

version: '3'
services:
  reverse:
    container_name: reverse
    hostname: reverse
    image: nginx:1.16.1
    ports:
      - 80:80
      - 443:443
    volumes:
      - ./volumes/nginx/config/nginx.conf:/etc/nginx/nginx.conf
      - ./volumes/nginx/config/conf.d:/etc/nginx/conf.d
      - ./volumes/nginx/certs:/etc/ssl/private
  web:
    image: odoo:13.0
    container_name: odoo
    depends_on:
      - db
    ports:
      - "8069:8069"
    volumes:
      - odoo-web-data:/var/lib/odoo
      - ./volumes/odoo/config:/etc/odoo
      - ./volumes/odoo/addons:/mnt/extra-addons
    environment:
      - HOST=db
      - USER=odoo
      - PASSWORD=odoo
  db:
    image: postgres:11.7
    environment:
      - POSTGRES_DB=postgres
      - POSTGRES_PASSWORD=odoo
      - POSTGRES_USER=odoo
      - PGDATA=/var/lib/postgresql/data/pgdata
    volumes:
      - odoo-db-data:/var/lib/postgresql/data/pgdata
volumes:
  odoo-web-data:
  odoo-db-data:

sudo docker-compose up output (running services: reverse, web, db)

Actual result: Reverse container commit suicide.

 sudo docker-compose up
Creating network "docker-odoo-https_default" with the default driver
Creating volume "docker-odoo-https_odoo-web-data" with default driver
Creating volume "docker-odoo-https_odoo-db-data" with default driver
Creating reverse                ... done
Creating docker-odoo-https_db_1 ... done
Creating odoo                   ... done
Attaching to reverse, docker-odoo-https_db_1, odoo

... reverse | 2020/04/22 15:23:27 [emerg] 1#1: host not found in upstream "odoo:8 069" in /etc/nginx/conf.d/sites-enabled/odoo.conf:2 reverse | nginx: [emerg] host not found in upstream "odoo:8069" in /etc/nginx /conf.d/sites-enabled/odoo.conf:2

user2932688 user2932688 · Accepted Answer · 2020-04-22T14:55:02

For that to work you need odoo container in your docker-compose.yaml, which would listen on port 8069. Right now it looks like it can't be resolved.

If you have it in your docker-compose - please let us see it so we can help you.

Plus by doing sudo docker-compose up reverse you are starting only reverse out of whole docker-compose. though you should start odoo first. or start everything by sudo docker-compose up

Dockerized NGINX: host not found in upstream “odoo:8069”

1 Answers