A node is the workhorse of the Kubernetes cluster, responsible for running containerized workloads; additional components of logging, monitoring and service discovery; and optional add-ons. Its purpose is to expose compute, networking and storage resources to applications.

As we explained in our previous article on Kubernetes architecture, head nodes typically run the control plane responsible for scheduling and managing the life cycle of workloads. The worker nodes run applications. The collection of head nodes and worker nodes becomes a cluster.

technologists to further the education and advancement of cloud native computing. The vendor-neutral events feature domain experts and key maintainers behind popular projects like Kubernetes, Prometheus, Envoy, CoreDNS, containerd and more.

Each  Kubernetes node includes a container runtime, such as Docker, plus an agent (kubelet) that communicates with the head. A node may be a virtual machine (VM) running in a cloud or a bare metal server inside the data center.

Components of the worker nodes. Source: Janakiram MSV.

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