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django-flyio

A set of simple utilities for Django apps running on Fly.io.

Note: This package is designed to work with V2 Apps. It has not been tested with V1 Apps.

Installation

pip install django-flyio

Usage

Multi-Region Fly Postgres

1. Set your DATABASES settings to call get_db_config from django_flyio.db.

   This function reads the PRIMARY_REGION and FLY_REGION environment variables to determine the Fly region the primary database is in and the Fly region the app is currently running in.

2. Add django_flyio.routers.FlyDBReplicaRouter to your DATABASE_ROUTERS settings.

   This router reads whether the DATABASES setting has a replica key and, if so, routes reads to the replica database.

# settings.py
from django_flyio.db import get_db_config

DATABASES = get_db_config()

DATABASE_ROUTERS = ["django_flyio.routers.FlyDBReplicaRouter"]

Middleware

To set the Fly-Server header containing the Fly server and region that served the request, add django_flyio.middleware.FlyResponseMiddleware to your MIDDLEWARE settings.

# settings.py
MIDDLEWARE = [
    # ...
    'django_flyio.middleware.FlyResponseMiddleware',
]

License

django-flyio is distributed under the terms of the MIT license.