Django celery deploy check.

app.py

from django.core.checks import register, Warning, Error

@register(deploy=True)
def check_celery_worker(**kwargs):
    from celery import current_app

    errors = []

    try:
        assert current_app.control.inspect().ping(), "could not ping"
    except Exception as e:
        errors.append(
            Error(
                f"Celery worker do not appear to be running: {e}",
                hint=f"Ensure that the celery worker are running",
                obj=None,
                id="EXXX",
            )
        )

    return errors