UX pattern to configure cluster apps

We currently only offer the ability to install cluster apps, with zero configuration available. This can lead to challenges, for example:

1. We've already had requests for configuration of the Prometheus app, like data retention period and storage class.
2. For Jaeger, we were considering adding an option to autodetect Jaeger installations rather than requiring a new deployment. In the event there were multiple in a single cluster, we'd need to expose some option of which to utilize. Alternatively we were also thinking of allowing a user to manually one, where they would input the namespace and service name.
3. For some apps which don't have automatic scaling, you may also need to control things like pod counts, memory/cpu requests, volume size, etc.