Cluster Autoscaler is not scaling down nodes in OCP 4

Solution Unverified - Updated -

Issue

  • How to check why the Cluster Autoscaler is not scaling down nodes in OpenShift 4?

  • There are messages in the cluster-autoscaler pod preventing nodes to be removed by the Cluster Autoscaler:

    Fast evaluation: node [node_name] cannot be removed: pod with local storage present: [pod_name]
[...]
Fast evaluation: node [node_name] cannot be removed: openshift-marketplace/[pod_name] is not replicated

Environment

  • Red Hat OpenShift Container Platform (RHOCP)
    • 4
  • Red Hat OpenShift Service on AWS (ROSA)
    • 4
  • Red Hat OpenShift Dedicated (OSD)
    • 4
  • Azure Red Hat OpenShift (ARO)
    • 4
  • OpenShift Managed (Azure)
    • 4
  • Cluster Autoscaler

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