Question

Dockerfile in a Django app on App Platform

I have a Django app that uses Docker and Docker Compose locally. I am trying to deploy to Digital Ocean App Platform.

When I setup the app the app spec automatically detects my Dockerfile. However, I get an error during deployment because the Dockerfile includes references to my local entrypoint.sh and start.sh files.

What would be the simplest way to resolve this without modifying the local Docker setup?

The deploy error:

Taking snapshot of full filesystem...        
bears-django | 14:43:10 INFO[0112] cmd: /bin/sh                                 
bears-django | 14:43:10 INFO[0112] args: [-c pip install -U pip]                
bears-django | 14:43:10 INFO[0112] Running: [/bin/sh -c pip install -U pip]     
bears-django | 14:43:10 /bin/sh: invalid option -- c
bears-django | 14:43:10 Usage: /bin/sh [option(s)] [file(s)]

Relevant part of my Dockerfile:

COPY ./entrypoint.sh /entrypoint.sh
COPY ./start.sh /start.sh

RUN chmod +x /entrypoint.sh \
    && chmod +x /start.sh

ENTRYPOINT ["/entrypoint.sh"]

###
#   Final Application Image
###
FROM py-base as py-app
RUN rm -rf /root/.cache
CMD ["/start.sh"]

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Since your Dockerfile relies on local scripts you’ll most likely need to modify the current setup. You could modify your Django app to run natively to app platform using this tutorial. Then you would be able to test locally without docker-compose just by running it with python manage.py runserver. The other option would be to build the Dockerfile locally and upload to a container registry, either DigitalOcean Container Registry (if you want to keep the image private) or to DockerHub. From there you can deploy the container directly to App Platform.