The API server is the brain for the entire Kubernetes service. All requests from users actually get submitted to the API server. The API server is a REST-based endpoint that accepts requests and acts on them. For example, requests to create pods are submitted to the API server. The API server stores this information and informs another component, known as a scheduler, to provision pods based on the YAML files. The health information of the pods and nodes is also sent to the API server by Kubelets from pod nodes.