KUBERNETES.md

Kubernetes Notes

Working with Multiple Clusters

Firstly, we need to ensure that we have saved all the clusters config files we need in the ~/.kube directory. We can use arbitrary names, or follow some sort of convention, e.g.: config-homelab, config-company, etc.

Then, we must export KUBECONFIG. For fish we can do it in ~/.config/fish/config/fish:

if status is-interactive
    set -x KUBECONFIG "$HOME/.kube/config-company:$HOME/.kube/config-homelab"
end

[!info]

This will merge all the fields from all the listed config files into a bigger config. We can check it by kubectl config view command.

Having that configured, we can start switching between contexts manually, but it's better to install and use kubectx utility. It's already in the Brewfile. It allows to quickly switch between clusters and namespaces, or provide nicer aliases. An example:

# aliases
kubectx homelab=kubernetes-admin@kubernetes
kubectx company=arn:aws:eks:eu-central-1:3...staging-eu

# switching between contexts
kubectx homelab
kubectx -