Merge Config File

Config backup

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

Merge config

export KUBECONFIG=~/.kube/config:~/.kube/config-2

kubectl config view --flatten > config

Save changes

mv config ~/.kube/config
chmod 600 ~/.kube/config

Update kubeconfig variable

export KUBECONFIG=~/.kube/config

Get clusters

kubectl config get-clusters