Kubernetes has two base node roles: supervisors and workers. A cluster may have additional roles derived from the “worker” role based on their unique infrastructure characteristics (e.g., type of CPU, NICs, GPUs, FPGAs, etc.) or the applications they run (e.g., infrastructure services, developers, development team, etc.). The supervisor nodes comprise the Kubernetes control plane, which hosts components that make cluster-level decisions. These include scheduling, responding to nodes' events, storing artifacts of all cluster-level objects from application manifests and ServiceAccounts definitions to Secrets and extensions to Kubernetes APIs in the form of CustomResourceDefinitions, and much more.
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