Which Kubernetes component runs on each node to manage the containers and communicate with the control plane?

Which Kubernetes component runs on each node to manage the containers and communicate with the control plane?

• A. kube-proxy
• B. etcd
• C. kubelet
• D. kube-scheduler

Answer: (C)

The component that runs on every node to manage the containers and communicate with the control plane is the kubelet. It acts as the node agent, registering the node with the API server and watching for Pod specifications assigned to that node. Using the configured container runtime (such as containerd or CRI-compatible runtimes) via the Container Runtime Interface, the kubelet starts, stops, and monitors the containers for each pod, ensuring the actual state matches the desired state described by the pod specs. It continually reports node and pod status back to the API server, including readiness and health information, so the control plane can make scheduling and lifecycle decisions. In contrast, etcd is the cluster data store on the control plane, the scheduler assigns pods to nodes, and kube-proxy handles network traffic for services on each node.

The component that runs on every node to manage the containers and communicate with the control plane is the kubelet. It acts as the node agent, registering the node with the API server and watching for Pod specifications assigned to that node. Using the configured container runtime (such as containerd or CRI-compatible runtimes) via the Container Runtime Interface, the kubelet starts, stops, and monitors the containers for each pod, ensuring the actual state matches the desired state described by the pod specs. It continually reports node and pod status back to the API server, including readiness and health information, so the control plane can make scheduling and lifecycle decisions. In contrast, etcd is the cluster data store on the control plane, the scheduler assigns pods to nodes, and kube-proxy handles network traffic for services on each node.