kubernetes - Is there any value that can be obtained through k8s-client-go to identify unique k8s cluster?

Question

I use client-go to manage multi k8s clusters. Is there any unique mark that can be used to distinguish different k8s clusters?

question from:https://stackoverflow.com/questions/65622847/is-there-any-value-that-can-be-obtained-through-k8s-client-go-to-identify-unique

Answer 1

This is an open issue, yet to be supported. But the current workaround is the use of the kube-system namespace UID. Two or more clusters can have the same kube-system UID(by taking backup of etcd), but this is a very rare case.

kubeSystem, err := client.CoreV1().Namespaces().Get(context.TODO(),"kube-system",metav1.GetOptions{})
if err != nil {
    log.Fatal(err)
}
uniqueID := kubeSystem.UID