Certified Kubernetes Administrator (CKA) Practice Test

The Kubernetes component responsible for selecting nodes for new Pods based on available resources is the Kube-scheduler. The Kube-scheduler assesses various factors such as resource availability, quality of service requirements, and any defined constraints to assign Pods to appropriate nodes in the cluster. It evaluates the current state of each node and matches these with the resource requests of the Pods awaiting scheduling, ensuring that Pods are placed on nodes with sufficient resources to handle them.

In contrast, the other components have distinct roles. The Kube-controller manages the state of the cluster and handles the lifecycle of resources, but it does not directly deal with scheduling Pods onto nodes. The Kube-proxy functions as a network proxy, facilitating communication to the Pods by maintaining network rules. The Kube-apiserver serves as the front-end for the Kubernetes API, handling requests from various clients but again, it does not participate in the scheduling decisions itself. This clarity in the responsibilities of each component highlights the unique function of the Kube-scheduler in resource management and load distribution within a Kubernetes cluster.