Nginx docker configuration is failing - docker

Question

I have attempted to build a Django / Gunicorn / Nginx configuration to run on AWS. The database container is running separately. When performing the docker-compose build step, however, the nginx step is failing. The files are shown below:
The dockerfile.prod:
version: '3'
services:
web:
build:
context: .
dockerfile: Dockerfile.prod
container_name: app
command: gunicorn The6ix.wsgi:application --bind 0.0.0.0:8000
volumes:
- static_volume:/home/app/web/staticfiles
networks:
- dbnet
expose:
- 8000
environment:
aws_access_key_id: ${aws_access_key_id}
aws_secret_access_key: ${aws_secret_access_key}
nginx:
build: ./nginx
ports:
- 1337:80
volumes:
- static_volume:/home/app/web/staticfiles
- media_volume:/home/app/web/mediafiles
depends_on:
- web
volumes:
static_volume:
media_volume:
networks:
dbnet:
external: true
My nginx Dockerfile (in ./nginx folder):
FROM nginx:1.21-alpine
RUN rm /etc/nginx/conf.d/default.conf
COPY nginx.conf /etc/nginx/conf.d
My nginx.conf file (in ./nginx folder):
upstream The6ix {
server web:8000;
}
server {
listen 80;
location / {
proxy_pass http://The6ix;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
proxy_redirect off;
}
location /static/ {
alias /home/app/web/staticfiles/;
}
location /media/ {
alias /home/app/web/mediafiles/;
}
The error log from my nginx container is as follows:
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf is not a file or does not exist
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2022/01/03 17:33:59 [emerg] 1#1: host not found in upstream "web:8000" in /etc/nginx/conf.d/nginx.conf:2
nginx: [emerg] host not found in upstream "web:8000" in /etc/nginx/conf.d/nginx.conf:2
Some posts have mentioned usage of the volume creation step in the .yaml file as being the culprit. But is there a better way to sequence this to enable correct run of nginx?

Answer 1

I had suspected that the error was the result of my configuration copy. In the end, it was actually a network error. The following modifications corrected the issue:
In a shell:
docker network create nginx_network
Modification to the docker-compose.yaml file:
version: '3'
services:
web:
build:
context: .
dockerfile: Dockerfile.prod
command: gunicorn The6ix.wsgi:application --bind 0.0.0.0:8000
volumes:
- static_volume:/home/app/web/staticfiles
- media_volume:/home/app/web/mediafiles
networks:
- dbnet
- nginx_network
ports:
- "8000:8000"
environment:
aws_access_key_id: ${aws_access_key_id}
aws_secret_access_key: ${aws_secret_access_key}
nginx:
build: ./nginx
ports:
- 80:80
volumes:
- static_volume:/home/app/web/staticfiles
- media_volume:/home/app/web/mediafiles
depends_on:
- web
networks:
- nginx_network
volumes:
static_volume:
media_volume:
networks:
dbnet:
external: true
nginx_network:
external: true