☁️ Free practice test question from: KCNA (KCNA)

The kubelet is the primary agent that runs on each node in a Kubernetes cluster and is responsible for node registration and maintenance with the control plane. When a worker node reboots, the kubelet automatically restarts and handles the re-registration process.

The kubelet is essentially the node's representative to the Kubernetes control plane. It maintains a persistent connection to the API server and regularly reports node conditions, available resources (CPU, memory, storage), and other relevant information.
When a node reboots, the following sequence occurs:
The operating system starts up

• System services begin to initialize

• The kubelet service starts

• The kubelet then:

  • Identifies itself to the API server

  • Registers the node with the cluster

  • Reports detailed information about the node's status and resource capacity

  • Continues to send heartbeats to maintain its connection