The Service Catalog architecture changed from using api aggregation to CRDs, but the docs still refer to the older architecture using api aggregation.
Couple of changes here:
1. Change the sentence on how Service Catalog is implemented
2. Replace the example for usage of api aggregation from service-catalog to metrics-server. There are multiple implementations that can be linked to(keda, prometheus, datadog,...), but keeping the documentation neutral by pointing to kubernetes-sigs/metrics-server
References:
- Service Catalog [v0.3.0 release notes](https://github.com/kubernetes-sigs/service-catalog/releases/tag/v0.3.0):
> In release 0.3.0, we've focused on replacing the Aggregated API Server with the CustomResourceDefinitions (CRDs) and the Admission Webhook solution.
- Project [README](https://github.com/kubernetes-sigs/service-catalog/pull/2691/files)
> Service Catalog recently switched to a new CRDs-based architecture. The old API Server-based implementation is available on the v0.2 branch. We support this implementation by providing bug fixes until July 2020.
Shivam Singhal