Change Kubernetes Node Name Guide

To change the node names in a Kubernetes cluster, the following steps need to be taken:

1. Use the following command to display the current node names:

kubectl get nodes

1. Delete the registration information of this node using the following command.

kubectl delete node <current-node-name>

Please replace with the actual node name.

1. Edit the configuration file of the Kubernetes cluster to modify the node name. The path of the configuration file may vary depending on the installation method and operating system. Usually, the file is located in /etc/kubernetes/manifests/kubelet.yaml.
2. Find the –hostname-override parameter in the configuration file and update its value to the new node name.
3. Save and close the configuration file.
4. Reboot the kubelet service to apply the changes. Restart the kubelet service using the following command:

sudo systemctl restart kubelet

1. After waiting for a period, the node will re-register with the Kubernetes cluster using a new node name.
2. Use the following command to list the nodes again and make sure that the node names have been successfully changed:

kubectl get nodes

Please be aware that changing node names may have an impact on some applications and services in the cluster. Before proceeding with this operation, make sure to understand all potential outcomes and proceed with caution in a production environment.