Which of these statements is true about the nodeSelector feature in Kubernetes?

The nodeSelector feature in Kubernetes is a straightforward mechanism that enables users to control the scheduling of pods. When you specify a nodeSelector in a pod specification, you are effectively filtering the nodes where that pod is eligible to run. This is accomplished by requiring that certain labels to be present on the nodes, ensuring that the Kubernetes Scheduler will only consider those nodes that meet the specified criteria when placing the pod.

This feature is particularly useful for scenarios such as deploying workloads that require specific node capabilities, like hardware traits (e.g., GPU-equipped nodes) or other node attributes. By using nodeSelector, you can effectively direct where your pods should reside, optimizing resource utilization and achieving compliance with specific operational requirements.

In contrast, other options, such as assigning a pod to a node based on CPU usage, resizing pods per node resources, and limiting functionality to daemonsets, do not align with what nodeSelector is designed to accomplish. These elements go beyond the simple association of pod scheduling to designated nodes and delve into functionalities provided by other Kubernetes scheduling mechanisms or features.