Problem statement

• Be able to start, stop, schedule and monitor FAF actions using the web UI.
• Actions can possibly take tens of hours to complete.
• Current functionality to run actions via command-line and schedule using Cron must not be disrupted.
• Doesn't necessarily need to support RHEL 6, however it must not be disrupted.

Solution

Use the Celery task queue.

Actions preparation

• Create a generic Celery task that runs a specified action.
• Pass actions parameters a mock command-line options.
• Create a mock CmdlineParser class that creates a web form and mock command-line parameters so that current tweak_cmdline_parser code can be used as-is.
• If necessary, allow actions to create their own web forms.
• Create a logger that saves the results somewhere. I may be useful to add a custom log level, such as log_result, and some progress info.

Task management

• Implement task management UI ( http://blog.miguelgrinberg.com/post/using-celery-with-flask )
• Schedule tasks using Celery ( https://pypi.python.org/pypi/celerybeat-redis )
• Implement scheduling UI