How does "vertical cluster autoscaling" via Cluster Autoscaler differ from Pod-level autoscaling (HPA/VPA), and what triggers node scale-up/scale-down?
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Incorrect.
The correct answer is B) Cluster Autoscaler adjusts the node count — scaling up when Pods can't be scheduled due to insufficient resources, and scaling down underused nodes whose Pods can be rescheduled — operating at the infrastructure level, unlike Pod-level HPA/VPA
Correct Answer
Cluster Autoscaler adjusts the node count — scaling up when Pods can't be scheduled due to insufficient resources, and scaling down underused nodes whose Pods can be rescheduled — operating at the infrastructure level, unlike Pod-level HPA/VPA
While HPA/VPA adjust Pod replica counts or resource allocations within existing capacity, Cluster Autoscaler changes the underlying infrastructure (node count) to provide or reclaim capacity, often working together with HPA in cloud environments.