Proper PascalCase for “kubeconfig”

Pascal Case capitalizes the first letter of each word. Microsoft has their own guidance for this, but nothing that really jumps out at me.

Kubernetes.io has a page dedicated to kubeconfig, which I will screenshot below:

.

Source: https://kubernetes.io/docs/concepts/configuration/organize-cluster-access-kubeconfig/

They repeated use kubeconfig in all lower case, and I saw one instance of KUBECONFIG — all upper case.

If you strictly adhere to Pascal casing rules, then it appears kubeconfig is one word making Kubeconfig the proper Pascal case form. Unfortunately, naming things is notoriously personal, so I would opt for either KubeConfig or Kubeconfig; choose the one that's easiest to read. And then ask your teammates which they prefer. Mostly likely you'll need to vote, because I doubt you will have consensus.

When naming things, I prefer to make it easy to read first, and then follow naming conventions, second. You can always use the context of the surrounding code. If you are in a class or method whose name contains "Kubernetes", do you really need "Kube"? Can't you just call it "Config"?

Sometimes the best way to resolve these sorts of naming issues is to avoid the problem altogether.

By default I would say the most straight-forward way would be KubeConfig, because of the reasons you mentioned (composed of two words - Kubernetes and Configuration).

However it is true that in this specific case kubeconfig is a commonly used term used all over the documentation (see e.g. here).

If we treat it as one word, but still respect starting with a capital as with PascalCase dictates - we get Kubeconfig which is what I would use.

Needless to say this is really a matter of personal preference.

The Kubernetes core is written in Go, which tends to use CamelCase style naming. There is canned Go code to read a $HOME/.kube/config file, which has some interfaces for testing.

If you import k8s.io/client-go/tools/clientcmd as your starting point for reading a kubeconfig file, that library contains definitions

type KubeconfigGetter func() (*clientcmdapi.Config, error)
type ClientConfigGetter struct {
    kubeconfigGetter KubeconfigGetter
}

This is fairly specifically two words "kubeconfig getter" combined together as a CamelCase name; "kubeconfig" is one word, all lowercase.