- <p><b>A node is a VM or a physical computer that serves as a worker machine in a Kubernetes cluster.</b> Each node has a Kubelet, which is an agent for managing the node and communicating with the Kubernetes control plane. The node should also have tools for handling container operations, such as {{< glossary_tooltip text="containerd" term_id="containerd" >}} or Docker. A Kubernetes cluster that handles production traffic should have a minimum of three nodes because if one node goes down, both an <a href="/docs/concepts/overview/components/#etcd">etcd</a> member and a control plane instance are lost, and redundancy is compromised. You can mitigate this risk by adding more control plane nodes.</p>
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