get-docker-secret

Utility function to fetch docker secrets/envvars.

For config values (flask projects) i like to fetch docker secrets and fall back to environment variables for development. This module provides a function to make this a one-liner: use docker secret -> fall back to envvar -> fall back to default value.

The function also provides the possibility to automatically cast the value or specify a custom directory for secrets.

Following assumptions are being made (params):

• autocast_name=True: secrets are lower-case, envvars upper-case. automatic conversion of name can be switched off via autocast_name=False
• cast_to=str: fill in desired datatype. special case bool: 'True'/'true' will be True. 'False'/'false' will be False
• getenv=True: you want to fall back to envvar. can be switched of via getenv=False
• default=None
• safe=True: returns None if name not found or cast fails. If you want exceptions: safe=False
• secrets_dir=/var/run/secrets

Usage

from get_docker_secret import get_docker_secret

value = get_docker_secret('secret_key', default='very_secret')

Testing

python setup.py test

not tested under windows

Changelog

1.0.2 - 2021-03-19

• Fixed: Only strip trailing newlines from secrets file

1.0.1 - 2019-12-07

• Fixed: Strip values read from file.

1.0.0 - 2018-01-30

• Initial publish