REST Api for Custom metric API server not in Go

General Discussions
1

I want to implement custom metric API server to use with HPA. we have proprietary monitoring system that have client library in C# but all the implementation i saw online are in Go.

Is there a definition of REST API (request and response) that the HPA call? or this can be only in Go (for some reason)?

I can use this to create a proxy server between Go and my C# server but i rather go straight to my server from HPA

2

KEDA project made this easy. You can create your own scaler using gRPC by the language you like. https://github.com/kedacore/keda