The Kubernetes kubelet is the primary “node agent” that runs on each node. Questions about the kubelet are most likely OFF TOPIC FOR STACK OVERFLOW; consider asking cluster administration questions on another site like Server Fault.
The kubelet is a core part of kubernetes that the primary “node agent” that runs on each node. The kubelet works in terms of a PodSpec. A PodSpec is a YAML or JSON object that describes a pod. The kubelet takes a set of PodSpecs that are provided through various mechanisms (primarily through the apiserver) and ensures that the containers described in those PodSpecs are running and healthy. The kubelet doesn’t manage containers which were not created by Kubernetes.
Application developers rarely need to be directly concerned with the kubelet operation or administration. Most questions about the kubelet are not programming-related and are off-topic for Stack Overflow; other sites like Server Fault or DevOps Stack Exchange would be more appropriate places to ask. On-topic questions might include, for example, the Go k8s.io/kubernetes/pkg/kubelet package.
Reference: http://kubernetes.io/docs/admin/kubelet/
