Starting Django's runserver in a Docker container through docker-compose - django

Question

I would like to have Django's runserver command running when I call docker-compose up
Here is what I tried, firstly, my image is starting from a Python image customized following this dockerfile:
# Dockerfile
FROM python:3.8
MAINTAINER geoffroy
# Set environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
# Ports exposure
EXPOSE 8000
VOLUME /data
# Install dependancies
RUN apt-get update && apt-get install -y \
vim \
git \
&& rm -rf /var/lib/apt/lists/*
# Setup python dependancies
RUN git clone https://github.com/blondelg/auto.git
WORKDIR /auto
RUN cd /auto
RUN pip install --no-cache-dir -r requirements.txt
# Build the secret key generator
RUN echo "import random" > generate_key.py
RUN echo "print(''.join(random.SystemRandom().choice('abcdefghijklmnopqrstuvwxyz0123456789!#$^&*(-_=+)') for i in range(50)))" >> generate_key.py
# Setup environment configuration
RUN cp auto/config_sample.ini auto/config.ini
RUN sed -i "s/SECRET_KEY_PATTERN/$(python generate_key.py)/gI" auto/config.ini
RUN sed -i "s/django.db.backends.sqlite3/django.db.backends.mysql/gI" auto/config.ini
RUN sed -i 's|{BASE_DIR}/db.sqlite3|autodb|gI' auto/config.ini
RUN sed -i "s/USER_PATTERN/root/gI" auto/config.ini
RUN sed -i "s/PASSWORD_PATTERN/root/gI" auto/config.ini
RUN sed -i "s/HOST_PATTERN/database/gI" auto/config.ini
RUN sed -i "s/PORT_PATTERN/3306/gI" auto/config.ini
Then, I have my docker-compose.yml designed as follow:
# docker-compose.yml
version: "3"
services:
database:
image: mariadb
container_name: database
ports:
- "3306:3306"
environment:
- MYSQL_ROOT_PASSWORD=root
- MYSQL_DATABASE=autodb
hostname: 'database'
runserver:
build: .
command: python /auto/manage.py runserver 0.0.0.0:8000
container_name: runserver
ports:
- "8000:8000"
depends_on:
- database
Then I run
docker-compose up --build -d
My two containers (runserver + database) are up but going to http://127.0.0.1:8000 returns an error page whereas I should have the Django start page.
Also, when I go into the container (docker exec -ti runserver bash) and when I run python manage.py runserver 0.0.0.0:8000, I can access to the Django start page through http://127.0.0.1:8000.
What could be wrong here?

Answer 1

In your Dockerfile, there is this line WORKDIR /auto. It means that you are already in the /auto folder. So, in your docker-compose file, you should say
python manage.py runserver 0.0.0.0:8000
Instead of /auto/manage.py.

Answer 2

Following this documentation https://docs.docker.com/compose/django/, Ifixed the way I was declaring volume in my docker-compose.yaml
volumes:
- .:/auto