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CKA study material · question 405 of 1000

An HPA must scale on a metric other than CPU or memory. What is required?

  1. A second metrics-server instance
  2. An adapter implementing custom.metrics.k8s.io or external.metrics.k8s.io
  3. A CustomResourceDefinition for the metric
  4. A kubelet flag enabling custom metrics
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Answer: B. An adapter implementing custom.metrics.k8s.io or external.metrics.k8s.io

A full metrics pipeline exposes richer metrics through an adapter implementing those APIs.

Source: Tools for Monitoring Resources (Kubernetes) — Full metrics pipeline

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