Provide support for auditing events in standardized formats

It is clear that core project developers appreciate the strengths of Ceilometer in having a reliable, core centralized service with the ability to track usage information towards statistical usage analysis and billing. It seems that many of these same projects are seeing similar “auditing” requirements but now with the emphasis on tracking access to services (by users and other services) for the purposes of security auditing. Leveraging Ceilometer’s design to enable different types of event auditing standards (and to provide for different purposes and views on events) seems to make good sense.