celery worker --workdir /mnt/src/ --config worker.celeryconfig -l debug -Q io_tasks -c 200 -P gevent --logfile=/var/log/celery.io_tasks.log --hostname=io_tasks.%h --without-heartbeat

[config]
 > app:         default:0x7f449e691cf8 (.default.Loader)
 > transport:   amqp://guest:**@localhost:5672//
 > results:     disabled://
 > concurrency: 200 (gevent)
 > task events: OFF (enable -E to monitor tasks in this worker)
[queues]
 > io_tasks         exchange=io_tasks(direct) key=io_tasks


# actual dockerized rabbitmq broker url (amqp://admin:**@172.17.0.3:5672//)
broker_url = "amqp://{user}:{password}@{host}:{port}/".format(
    user=os.environ['RABBITMQ_ENV_RABBITMQ_USER'],
    password=os.environ['RABBITMQ_ENV_RABBITMQ_PASS'],
    host=os.environ['RABBITMQ_PORT_5672_TCP_ADDR'],
    port=os.environ['RABBITMQ_PORT_5672_TCP_PORT']
)