Cookiecutter for Django in Dokku

Cookiecutter for Django on docker using dokku in prod and docker compose in dev and test.

Broad principles this project tries to maintain:

• See OpenUp's development best practises
• See 12-factor App principles
• Projects are tested out of the box (including Continuous Integration (CI))
• Prefer stable versions of libraries and services
  • prefer Long Term Support (LTS) versions
  • Don't use the bleeding edge - wait until at least one point-release of a new major version.

Properties of the projects this produces:

• Same Dockerfile used for dev, test and prod
• Project directory named by project_slug
  • Django project directory named by project_slug
    • An initial app directory inside the django project directory named by app_slug
• No non-vendor initial models or migrations
• Python dependency management via Pipenv
• Settings relating to security or the correct environment have no default and block startup to ensure they are set explicitly
• Passing tests
• Travis-CI
• Codecov.io code coverage reports for CI test runs
• Frontend assets
  • Bundled using parcel
  • Hashed and served using whitenoise in Django.

Important properties of this cookiecutter:

• Ensure it keeps working
  • End-to-end test that creates and smoke-tests a basic project
• Ensure it's easy to maintain
• Ensure the choices made for projects it creates are explained
• Produce minimal boilerplate by default (lowest common denominator of what we consider well-configured apps) rather than producing everything possible just because it's easy to produce boilerplate using cookiecutter.
  • See cookiecutter-django for more of a bleeding edge and experimental showcase of what's possible

Requirements

Install cookiecutter command line: pip install cookiecutter

Usage

1. Install cookiecutter
2. Run cookiecutter gh:OpenUpSA/cookiecutter-django-dokku
3. Answer the questions
4. Initialise a git repository in yout project (git init)
5. Profit

To try it out quickly, just create a project im /tmp, accept all the defaults, run tree and docker compose:

$ cookiecutter gh:OpenUpSA/cookiecutter-django-dokku -o /tmp
full_name [Your name]:
project_name [My site]: My Django Project
project_slug [my_django_project]:
app_slug [polls]: polls
...

$ tree /tmp/my_django_project/
/tmp/my_django_project/
├── docker-compose.yml
├── Dockerfile
├── manage.py
├── my_django_project
├── ├── admin.py
├── ├── initial_app
├── ├── ├── admin.py
...

$ docker compose up
WARNING: The DJANGO_DEBUG_TOOLBAR variable is not set. Defaulting to a blank string.
Creating network "my_django_project_default" with the default driver
Creating volume "my_django_project_db-data" with default driver
Building web
Step 1/9 : FROM python:3.7-slim-buster
 ---> 5b03cb8574a0
Step 2/9 : ENV PYTHONUNBUFFERED 1
 ---> Using cache
 ---> 67ce14763e07
 ...

Maintenance

A fairly convenient dev workflow looks something like:

1. Make a change
2. In a shell in this directory, run rm -rf /tmp/end_to_end_test/ && time bash -x tests/test_end_to_end.sh
3. Do what you need to debug
4. In a shell in /tmp/end_to_end_test, run cd . && docker compose down --volumes

• You might need to add --rmi local to remove and rebuild images

5. Rinse and repeat.

To modify default dependencies:

1. Run the above to get an environment
2. Get a root shell with something like docker compose run --rm -u root web bash
3. Make your dependency changes using pipenv
4. Outside the container, copy Pipfile and Pipfile.lock back to this repository
5. Test your changes using the end-to-end test approach above

License

This project is licensed under the terms of the MIT License