Open Stack

On 10/28/2015 03:08 PM, McLellan, Steven wrote:
> Hi,
>
> One of our questions this summit for Searchlight is whether we can
> reduce the time and effort required to index resources by getting as
> much information from notifications as possible.
>
> Nova's API and notifications provide data in different formats; some
> information is missing and some is in different formats (1). In
> addition, notification information isn't versioned and can change at
> will. Currently we've taken the approach of treating the notification
> as a sign that something has happened and that we should get current
> state from the API.
>
> We'd love to be able to process notifications directly, and have some
> assurance that the format won't change drastically without warning.

This is why notification payloads need to be versioned. Until they are 
versioned, there can be no such guarantee.

See this thread for some more background:

http://lists.openstack.org/pipermail/openstack-dev/2014-July/039858.html

Best,
-jay