Target multiple deployments in one custom auto scaler

[mohammadkhavari]

Is your feature request related to a problem? Please describe.
I have a microservice and want to create a custom autoscaler for services, considering I want to use the same scaling policy for all services, by using CPA I should make multiple CPA's for scaling services because I can target just one deployment by name on CPA, in the end, there's multiple CPA pods. I think It's not an efficient solution.

Describe the solution you'd like
one CPA pod targets multiple deployments and runs (metric gatherer, evaluation) for each of them on the interval (in some order).

[jthomperoo]

The original design for the CPA originally allowed you to target multiple deployments, but was removed for simplicity sake. I've assigned this to myself to investigate if this would now be feasible; possibly as a new run mode. I'll update this ticket with any investigation results.