* [kubelet](/docs/admin/kubelet/) - The primary *node agent* that runs on each node. The kubelet takes a set of PodSpecs and ensures that the described containers are running and healthy.
* [kube-apiserver](/docs/admin/kube-apiserver/) - REST API that validates and configures data for API objects such as pods, services, replication controllers.
* [kube-proxy](/docs/admin/kube-proxy/) - Can do simple TCP/UDP stream forwarding or round-robin TCP/UDP forwarding across a set of back-ends.
* [kube-scheduler](/docs/admin/kube-scheduler/) - Scheduler that manages availability, performance, and capacity.
* [federation-apiserver](/docs/admin/federation-apiserver/) - API server for federated clusters.
* [federation-controller-manager](/docs/admin/federation-controller-manager/) - Daemon that embeds the core control loops shipped with Kubernetes federation.
## Design Docs
An archive of the design docs for Kubernetes functionality. Good starting points are [Kubernetes Architecture](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/architecture.md) and [Kubernetes Design Overview](https://github.com/kubernetes/kubernetes/tree/{{page.fullversion}}/docs/design).