kube-apiserver

This is the component that provides a RESTful interface on the Kubernetes control plane. It is used to manage the lifecycle of resources in the cluster.

Run the following command to check the status of the kube-apiserver component:

kubectl get pods -n kube-system -l component=kube-apiserver --show-labels

kubectl get pods -n kube-system -l component=kube-apiserver --show-labels
NAME                    READY   STATUS    RESTARTS   AGE   LABELS
kube-apiserver-master   1/1     Running   0          14h   component=kube-apiserver,tier=control-plane

This pod is controlled and run by the master node. It listens on the port 6443 for incoming connections.

The kubectl command-line-interface communicates with the kube-apiserver using the .kube/config file. This file contains the details of the cluster, including the server address, the certificate authority, and the user credentials.

To view the kube-apiserver logs, run the following command:

kubectl logs kube-apiserver-master -n kube-system

And since this is a RESTful interface that provides a set of APIs, you can get the API documentation by running the following command:

kubectl get --raw /openapi/v2 > openapi.json

You can then import the openapi.json file into a REST client like Postman to view the API documentation.