How to merge kubectl config file with ~/.kube/config?

Question

Is there a simple kubectl command to take a kubeconfig file (that contains a cluster+context+user) and merge it into the ~/.kube/config file as an additional context?

Answer 1

Do this:

export KUBECONFIG=~/.kube/config:~/someotherconfig  kubectl config view --flatten 

You can then pipe that out to a new file if needed.

Answer 2

If you find yourself doing this a lot... There is now also the krew plugin package manager for kubectl.

The krew plugin "konfig" can help you manage your ~/.kube/config file.

Using the konfig plugin the syntax will be:

kubectl konfig import -s new.yaml

To install krew: https://github.com/kubernetes-sigs/krew

To install konfig: kubectl krew install konfig