Kubernetes - Merging kubeconfig Files

In this short article, we will look how we can merge a new kubeconfig file to an existing config file

Introduction

• Kubernetes is an open-source container orchestration tool to manage containerized applications

• An important component of Kubernetes is kubeconfig, a configuration file used to connect to our clusters

• A kubeconfig file contains the cluster name and endpoint, user credentials and the context

Steps

• Make a copy of your existing kubeconfig file

$ cp ~/.kube/config ~/.kube/config.bak

• Merge the old and new kubeconfig files using the below command

$ KUBECONFIG=~/.kube/config:~/new-kubeconfig.yml \
             kubectl config view --flatten > ~/merged-kubeconfig.yml

• Replace your old config with new merged config file

$ cp ~/merged-kubeconfig.yml ~/.kube/config

• List the contexts, now you can see our new cluster

$ kubectl config get-contexts

Reference

https://jacobtomlinson.dev/posts/2019/how-to-merge-kubernetes-kubectl-config-files/