How does Cluster Autoscaler decide which nodes to remove during scale-down when multiple nodes are underutilized?

hard📝 Conceptual Q9 of 15

Kubernetes - Resource Management

AIt removes nodes with the least number of pods first

BIt removes nodes that can be drained without evicting pods that cannot be rescheduled

CIt removes nodes randomly to balance the cluster

DIt removes the newest nodes first

Step-by-Step Solution

Solution:

Step 1: Understand scale-down node selection criteria
Cluster Autoscaler removes nodes that can be safely drained without causing pod scheduling failures.
Step 2: Eliminate incorrect options
It does not remove nodes randomly or based on pod count alone, nor does it remove newest nodes first.
Final Answer:
It removes nodes that can be drained without evicting pods that cannot be rescheduled -> Option B
Quick Check:
Safe node removal avoids unschedulable pods [OK]

Quick Trick: Autoscaler removes only safely drainable nodes [OK]

Common Mistakes:

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