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Thanks gordon.

I am using Mitaka version.

And yes I have known that ceilometer notification agent will listen for the
notification topics, but my question is which file/class will do it.
When I am debugging the code, at the first time when the event send out to
ceilometer exchange notification topic, EventsNotificationEndpoint  in
event/endpoint.py will handle it, however, when I send the same event
again, with log/pdb enabled, the event is not processed in
EventsNotificationEndpoint any more, and I can't find where it is done. It
looks so weird or maybe that is by design for some reason? The behavior is
same with/without definition in event_definition.yaml

So I wonder how is different for the workflow by sending same events twice.


Thanks.

On Thu, Apr 20, 2017 at 6:11 AM, gordon chung <gord at live.ca> wrote:

>
>
> On 19/04/17 03:05 PM, Hui Xiang wrote:
> > Hi folks,
> >
> >   I am posting some self-defined events to amqp ceilometer exchange
> > notification topic, during the debug session, I find that at the first
> > time, event are arriving at notification bus as the AMQPIncomingMessage,
> > and then handled by EventsNotificationEndpoint() , however, the second
> > time, neither the AMQPIncomingMessage or the EventsNotificationEndpoint
> > can see it, but it does can list from ceilometer event-list. So I wonder
> > how is the event processing with the same event type?
> >
>
> not sure what version you are using, but basic workflow since mitaka (i
> think) is the notification agent listens to 'notifications.*' topics on
> specific exchanges (including) ceilometer. for events, it attempts to
> match incoming message against known events[1]. it will build event
> based on definition. if there is no, definition, it will create a sparse
> event with a few attributes. from there it is processed according to
> pipeline[2]. you'll noticed by default it pushes to gnocchi so it won't
> get stored in ceilometer/panko storage. you can edit it accordingly.
>
> [1]
> https://github.com/openstack/ceilometer/blob/master/
> ceilometer/pipeline/data/event_definitions.yaml
> [2]
> https://github.com/openstack/ceilometer/blob/master/
> ceilometer/pipeline/data/event_pipeline.yaml
>
> cheers,
> --
> gord
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