Celery Configuration Required in nautobot_config.py

[nniehoff]

Environment

• Python version: 3.6.14
• Nautobot version: 1.1.0b2

In nautobot_config.py I have CACHES defined as:

CACHES = {
    "default": {
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": parse_redis_connection(redis_database=0),
        "TIMEOUT": 300,
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient",
        },
    }
}

By default celery then tries to connect to redis on localhost:6379. This is the default in settings.py for CACHES["default"]["LOCATION"] however in my case redis is in a separate container at redis:6379 specified using the environment variables NAUTOBOT_REDIS_HOST and NAUTOBOT_REDIS_PORT. I had to add:

CELERY_BROKER_URL = CACHES["default"]["LOCATION"]
CELERY_RESULT_BACKEND = CACHES["default"]["LOCATION"]

to nautobot_config.py after the declaration of CACHES to catch my change. I also found:

CELERY_BROKER_URL=...
CELERY_RESULT_BACKEND=...

environment variables in the nautobot repo in development/dev.env however I don't see a spot in Nautobot where these are actually used.

Steps to Reproduce

1. Configure redis with an external hostname via env vars.
2. Start Nautobot celery worker

Expected Behavior

Celery should connect to the redis host specified.

Observed Behavior

Celery attempts to connect to localhost:6379