Certified Kubernetes Administrator (CKA) Practice Test

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What is the function of the kube-scheduler in a Kubernetes cluster?

Managing network policies

Translating YAML files into objects

Selecting nodes for newly created Pods

The kube-scheduler is a critical component of a Kubernetes cluster responsible for selecting the appropriate nodes for newly created Pods. When a Pod is created, it needs to be placed on a specific node that meets the resource requirements and scheduling constraints defined in its specification. The kube-scheduler evaluates the available nodes based on various factors such as resource availability (CPU, memory), quality of service (QoS) requirements, affinity and anti-affinity rules, taints, and tolerations, among others. The scheduler’s job is to ensure optimal placement of Pods across the cluster to enhance resource utilization and balance workload while adhering to the defined constraints and policies.

By effectively managing where Pods are hosted, the kube-scheduler plays a vital role in maintaining the performance and efficiency of the overall cluster, making it an essential service in Kubernetes orchestration.

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Monitoring system health

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