What components and configurations are necessary on a Worker Node in Kubernetes?

On a Worker Node in Kubernetes, the following components need to be installed and configured:

• kubelet — the agent that runs containers and monitors their state according to Control Plane instructions.
• kube-proxy — provides network communication between pods and the external world, implementing network rules.
• Container Runtime — the environment for running containers, such as Docker, containerd, or CRI-O.

In addition to installing these components, it is important to:

• Configure proper network interaction (e.g., via CNI plugins).
• Ensure node security (firewall, SELinux/AppArmor).
• Set up monitoring and logging for diagnostics.

The startup of kubelet and kube-proxy is usually automated during cluster installation, for example, using kubeadm.