What is a kubelet component?

This is an agent that runs on each worker node of a Kubernetes cluster and manages containers by executing commands from the control plane. It registers the node with the API server and reports the status of running pods. Kubelet interacts with various container runtimes (such as Docker, containerd) to start, stop, and monitor containers according to pod specifications received from the API server.

Main functions:

• Registering the node with the Kubernetes API.
• Receiving pod specifications (PodSpecs) from the API server or through local files.
• Launching and managing containers for each pod.
• Monitoring the status of pods and containers.
• Reporting the status of pods, nodes, and resources to the API server.
• Performing liveness and readiness probes.

Example PodSpec:

// apiVersion: v1
// kind: Pod
// metadata:
//   name: my-nginx-pod
// spec:
//   containers:
//   - name: nginx-container
//     image: nginx:latest
//     ports:
//     - containerPort: 80
//   restartPolicy: Always