feat(ui): Show eks cluster name in the main UI

[ianis-c]

Issue #, if available:
No linked issue.

Description of changes:
This feature retrieve and show the current EKS cluster being shown in the eks-node-viewer main UI.
It can be useful when working with more than one cluster (one or more clusters per environment for example).

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[ianis-c]

Hi @tzneal, do you think this feature could be integrated ?

[tzneal]

It should be possible to pull this from the kubeconfig file, I would greatly prefer that to running the kubectl binary.

[ianis-c]

You're right, would be better to just parse the json config file. I'll do that

[tzneal]

I think you can get it via something like this:

-func getConfig(kubeconfig, context string) (*rest.Config, error) {
-	// use the current context in kubeconfig
-	return clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
+func getConfig(kubeconfig, context string) (string, *rest.Config, error) {
+	loadCfg := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
 		&clientcmd.ClientConfigLoadingRules{Precedence: strings.Split(kubeconfig, ":")},
-		&clientcmd.ConfigOverrides{CurrentContext: context}).ClientConfig()
+		&clientcmd.ConfigOverrides{CurrentContext: context})
+	raw, err := loadCfg.RawConfig()
+	if err != nil {
+		return "", nil, err
+	}
+	cfg, err := loadCfg.ClientConfig()
+	if err != nil {
+		return "", nil, err
+	}
+	return raw.CurrentContext, cfg, err
 }

[tzneal]

I think taking up a new line on the screen is too much, can it be fit anywhere else? Maybe after the "q: quit" message?

[ianis-c]

Yes, in my use case it's a pretty important information that's why I put it up.
But I can move it at the bottom under the controls description.