312-50V13 Question #386: Real Exam Question with Answer & Explanation

Question

Geena, a cloud architect, uses a master component in the Kubernetes cluster architecture that scans newly generated pods and allocates a node to them. This component can also assign nodes based on factors such as the overall resource requirement, data locality, software/hardware/policy restrictions, and internal workload interventions. Which of the following master components is explained in the above scenario?

Options

• AKube-controller-manager
• BKube-scheduler
• CKube-apiserver
• DEtcd cluster

Explanation

The Kube-scheduler is the Kubernetes master component responsible for assigning newly created Pods to appropriate nodes based on various factors and constraints.

Common mistakes.

• A. Kube-controller-manager runs various controller processes that regulate the state of the cluster, such as replication controllers, endpoints controllers, and namespace controllers, but it doesn't assign pods to nodes.
• C. Kube-apiserver is the front end for the Kubernetes control plane, exposing the Kubernetes API; it processes REST requests and updates etcd, but it doesn't perform scheduling.
• D. Etcd cluster is a distributed key-value store that serves as Kubernetes' backing store for all cluster data, but it is a data store, not a component responsible for active scheduling decisions.

Concept tested. Kubernetes Kube-scheduler function

Reference. https://kubernetes.io/docs/concepts/overview/components/#kube-scheduler

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