Re: [lmap] draft-ietf-lmap-information-model-05: Controller timeout

[Juergen Schoenwaelder <[e-mail]>]

On Tue, May 12, 2015 at 01:04:49PM +0000, Carey, Timothy (Timothy) wrote:

> So does that now mean we need to have a operational status now for a
> scheduled task? I can see it now as attribute with values like:
> enabled, disabled, suppressed and errored or possibly a conditions
> object?

I think there two questions here:

a) If I loose connectivity, do I disable all schedules (and thus
   implicitely all actions) or do I disable scheduled tasks? My idea
   was to simply disable all schedules (and as such the schedules have
   their state changed to disabled).

   The suppression mechanism can suppress both a list of tasks and a
   list of schedules and it is configurable what is being suppressed.

   One option is that loss of connectivity simply causes suppression
   to be activated. Another option is that loss of connectivity
   supresses all tasks that are not essential for communication with a
   controller and house keeping. Another option is that loss of
   connectivity suppresses all schedules. We need to select one.

b) Do we expose the internal state that is maintained? Right now, we
   do not expose any operational state for schedules. But we do expose
   operational state for tasks. If loss of connectivity means we
   disable all tasks that are not essential for communication with a
   controller and house keeping, than exposing that information would
   be a rather minor change to the information and data model.

   A task state would then be enabled (default), suppressed or
   disabled. Error information is already covered in the last-failed
   attributes of a task. (And this is useful in situations where tasks
   fail occasionally so you can get information about the last failure
   even though the task is working fine right now).

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
Fax:   [phone]         <http://www.jacobs-university.de/>