What provides metrics for HPA in OpenShift 3.11?

Solution Verified - Updated -

Issue

  • What is the metrics-server?
  • Does HPA (horizontal pod autoscaler) work with metrics-server? Heapster is no longer needed?
  • How to install metrics-server?
  • How do I use HPA in 3.11?
  • With Hawkular-metrics being deprecated and since we are using prometheus for monitoring, how do we get hpa setup?

Environment

  • Red Hat OpenShift Container Platform
    • 3.11

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