That's a good question.

Whilst Perspective sources a lot of data from AWS Config, it also supplements and enriches the data from other sources where resources are not supported or where we wanted to show more detail. We'll be adding in other data sources in future, too.

Additionally, the AWS Config query language is quite helpful but doesn't expose a graph of the resources. Our approach is to pull the individual relationship data out and represent those in a graph DB (Amazon Neptune). Backing on to a graph database gives us the ability to let users navigate through the relationships of interest on the fly, rather than dumping what would inevitably be a complicated mess on the screen if we just showed everything.

Using this approach is also one of the ways we've tried to solve the UI/UX challenges presented in this space. Rather than say "show me all the things" that would lead to a complex mess of interconnections (and probably explode browsers) we instead encourage a workflow that starts with a resource or workload and explores outwards from there. It also allows us to implement some interesting features in future -- we intend to keep working on the project.

The ElasticSearch cluster is used by the discovery process to locate resources based on the metadata we collect; it's part of the way we enrich the data and relationships beyond what we get from Config.