Celery is used over beanstalkd to apply firewall rules in a serial manner so that locks are avoided on the flowspec capable device. In our setup celery runs via django. That is why the python-django-celery package was installed.
Create the celeryd daemon at /etc/init.d/celeryd::
+
#!/bin/sh -e
# ============================================
# celeryd - Starts the Celery worker daemon.