django-configuration-management 0.3.2

A merge conflict-less solution to committing an encrypted configuration to the repo with secrets and non-secrets side-by-side.

Quick start

This package features an opinionated configuration management system, focused on combining both secret and non-secret keys in the same configuration file. The values for secret keys are encrypted and can be committed to the repo, but since each key is separated on a line-by-line basis, merge conflicts shouldn't cause much trouble.

This package is intended to be used with a django project, though it's currently not making use of any Django specific features.

Needless to say, this is in very early development.

Install

pip install django-configuration-management

cli

Generate a key

In a terminal, enter:

generate_key

Follow the instructions printed to the console. For example, if you're setting up a production configuration, make a file called .env-production in the root of your django project. Inside of it, save the key generated above to a variable called ENC_KEY.

Upsert a secret

To insert or update a secret, enter:

upsert_secret --environment <your environment>

And follow the prompts.

Insert a non-secret

Simply open the .yml file for the generated stage (the naming scheme is config-<environment>.yaml), and insert a row. It should look like this:

USERNAME: whatsup1994 # non-secret
PASSWORD:
  secret: true
  value: gAAAAABf2_kxEgWXQzJ0SlRmDy6lbXe-d3dWD68W4aM26yiA0EO2_4pA5FhV96uMWCLwpt7N6Y32zXQq-gTJ3sREbh1GOvNh5Q==

Insert an AWS Secret Manager secret

Add a row where the key name is your secret name in AWS Secret Manager, with a sub-key value pair of use_aws: true. It should look like this:

secrets/integrations/aws_secret:
  use_aws: true
  secret_keys:
    - AWS_SECRET

The secret in your AWS instance will need to conform to the naming patterns used elsewhere in this repo, e.g., a properly structured AWS Secret Manager secret will look like

{
  "AWS_SECRET": "I'm a secret"
}

The keys of this object will be translated into python variables for the Django settings module in much the same way the keys of the local yaml will be, but you must explicitly call out which keys you want to load by specifying the attribute secret_keys.

Your AWS credentials must also be set up correctly to make API calls to AWS.

Manually editing the file

You can change the values of non-secrets by hand, as well as the keynames, but clearly you must not change the value of secrets by hand, as they're encrypted. Changing the order of any of the keys is perfectly fine.

Print secrets to the console

To show the decrypted values of all the secrets in the console, enter:

reveal_secrets --environment <your-environment>

Re-encrypt a config file

To re-encrypt all secret values for a given environment's config file, pass

reencrypt --environment <your-environment> --new-key <your-new-key>

If you do not provide a key, a new one will be generated for you.

Extras

In the root of your django project, you can create a file called config-required.json.

The JSON object can be a list or a dictionary. This is useful for validating the presence of your keys on start-up.

Validating secrets that come from AWS Secret Manager is done implicitly since you must specify a secret_keys attribute in your .yaml. This is needed so that only AWS secrets that are explicitly called out are loaded into your Django settings/Python environment.

Settings

There are two ways to use this library, if you don't mind a little magic, you can simply inject the config by importing the following function in your django settings file, and passing in the current module.

# settings.py
from django_configuration_management import inject_config

# development is the environment name
inject_config("development", sys.modules[__name__])

See the example project for a demonstration of this.

If you want more verbosity, you can import the following function which will return the config as a normalized dictionary that's flat and has all secrets decrypted.

# settings.py
from django_configuration_management import get_config

# config = {"USERNAME": "helloworld", "PASSWORD": "im decrypted}
config = get_config("development")

USERNAME = config["USERNAME"]
# ...

Using without a .env

If you want to skip using the .env, you can set the optional argument dotenv_required to False when invoking either of the above two methods. Doing so means it then becomes your responsibility to load an environment variable called ENC_KEY that stores the relevant encryption key for the stage you're trying to load.

# settings.py
from django_configuration_management import get_config

# Will error out if you didn't load ENC_KEY correctly
config = get_config("development", dotenv_required=False)

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This project uses poetry for dependency management and packaging.