Proposal: Coordinated/Ratio-Based Scaling for Dependent Services

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Omer Aplatony

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Oct 23, 2025, 10:28:02 AMOct 23
to Autoscaling Kubernetes

Hello SIG Autoscaling,

We've prepared a proposal on coordinated/ratio-based scaling for interdependent services (e.g., chained microservices, LLM pipelines).

The document outlines the architectural paths for this functionality:

  1. In-Tree Modification: Extending the core HPA API to manage multiple proportional targets.

  2. Custom Resource: Creating an orchestrating Custom Resource Definition (e.g., HPAGroup) built atop existing HPAs.

We seek initial feedback on whether this is better pursued immediately as a KEP proposal for an in-tree solution, or if we should start an incubation subproject (CRD) within SIG Autoscaling to refine the concept first.

Thank you,

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