[FIXED] pipenv --system option for docker. What is the suggested way to get all the python packages in docker

Issue

I use pipenv for my django app.

$ mkdir djangoapp && cd djangoapp
$ pipenv install django==2.1
$ pipenv shell
(djangoapp) $ django-admin startproject example_project .
(djangoapp) $ python manage.py runserver

Now i am shifting to docker environment.

As per my understanding pipenv only installs packages inside a virtualenv

You don't need a virtual env inside a container, docket container IS a virtual environment in itself.

Later after going through many Dockerfile 's i found --system option to install in the system.

For example the following i found:

https://testdriven.io/blog/dockerizing-django-with-postgres-gunicorn-and-nginx/

COPY ./Pipfile /usr/src/app/Pipfile
RUN pipenv install --skip-lock --system --dev

https://hub.docker.com/r/kennethreitz/pipenv/dockerfile

# -- Install dependencies:
ONBUILD RUN set -ex && pipenv install --deploy --system

https://wsvincent.com/beginners-guide-to-docker/

# Set work directory
WORKDIR /code

# Copy Pipfile
COPY Pipfile /code

# Install dependencies
RUN pip install pipenv
RUN pipenv install --system

So --system is only sufficient or --deploy --system is better way. And --skip-lock --system --dev which is different again.

So can some one guide how to get my environment back in my Docker

Solution

A typical Docker deployment would involve having a requirements.txt (it's a file where you can store your pip dependencies, including Django itself) file and then in your Dockerfile you do something like:

FROM python:3.7  # or whatever version you need
ADD requirements.txt /code/
WORKDIR /code
# install your Python dependencies
RUN pip install -r requirements.txt
# run Django
CMD [ "python", "./manage.py", "runserver", "0.0.0.0:8000"]

You don't need pipenv here at all since you no longer have a virtual environment as you say.

Even better you can configure a lot of that stuff in a docker-compose.yml file and then use docker-compose to run and manage your services, not just Django.

Docker have a very good tutorial on dockerising Django with it. And if you're unsure what's going on in the Dockerfile itself, check the manual.

Answered By - Nobilis