scheduled shutdown

Scheduling http://docs.celeryproject.org/en/latest/

res = shutdown.apply_async(('i-xxx'), queue='xxx', countdown=s_wait)

store res.id in ec2 tags to look up later. when shutdown is executed, remove the tag

Canceling Shutdown

• http://stackoverflow.com/questions/8920643/cancel-an-already-executing-task-with-celery

Checking that there are workers running

• http://celery.readthedocs.org/en/latest/userguide/workers.html#inspecting-workers
• http://stackoverflow.com/questions/14142150/celery-programatically-list-workers

Failure notification

• https://celery.readthedocs.org/en/3.0/configuration.html#celery-send-task-error-emails

Daemonizing

• http://celery.github.io/celery/cookbook/daemonizing.html