I would like to use STAGE variable from env_file in my Dockerfile. Most posts suggest just use -e with docker-compose up command but I would like to achieve this by the env_file.
I tried add args but it's not working.
Env file
STAGE=DEV
docker-compose.yml
version: '2'
services:
web:
build: .
env_file:
- /etc/web.env
command: python3 manage.py runserver 0.0.0.0:8000
volumes:
- ./backend:/code
ports:
- "8000:8000"
Dockerfile
FROM python:3.6
ENV PYTHONUNBUFFERED 1
(...)
RUN pip install -r project/requirements/$STAGE.txt
Result of this should be:
RUN pip install -r project/requirements/DEV.txt
I found that it is not possible during build but maybe exist some method to do this. I will be helpful for any tips.
You can map the environment variable into the container by adding an environment option in your docker compose yaml file:
version: '2'
services:
web:
build: .
env_file:
- /etc/web.env
command: python3 manage.py runserver 0.0.0.0:8000
volumes:
- ./backend:/code
ports:
- "8000:8000"
environment:
- STAGE: ${STAGE}
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