MrMat :: Python :: API :: Flask

Boilerplate (and playground) for a code-first Python Flask API.

How to build this

Create a virtual environment, then:

(venv) $ pip install -r requirements.txt
(venv) $ python -m build -n --wheel

If you intend to run the testsuite or work on the code, then also install the requirements from requirements.dev.txt. You can run the testsuite using

(venv) $ PYTHONPATH=src pytest tests

The resulting wheel is installable and knows its runtime dependencies. Any locally produced wheel will have version 0.0.0.dev0. This is intentional to distinguish local versions from those that are produced as releases in GitHub. You can override this behaviour by setting the MRMAT_VERSION environment variable to the desired version.

You can produce a container image and associated Helm chart using the provided Makefile:

$ make container

# Optionally install the produced container image in the current Kubernetes context
$ make helm-install

How to run this

To run from an installed wheel:

$ gunicorn --bind 0.0.0.0:8000 mrmat_python_api_flask:app

Or you can just start the container image or Helm chart. Both are declared in var/container and var/helm respectively and used by the top-level Makefile.

How to configure this

When you do not explicitly configure anything the app will use an ephemeral in-memory SQLite database. You can change this to PostgreSQL by:

• overriding the config.db_url variable of the Helm chart, or
• setting the APP_CONFIG_DB_URL environment variable, or
• creating a config file in JSON setting db_url

The app will pick up the config file from the path set in the APP_CONFIG environment variable, if it is set. Note that the APP_CONFIG_DB_URL environment variable overrides the setting in the configuration file.