The default Context that is used by kubectl is specified by the line current-context in the kubeconfig file. So, what does kubectl do with this file? To over-simplify things, kubectl connects to one of the "Contexts". For example, Context A could map User A to Cluster A, and also limit them to only Namespace A. Contexts can also be scoped to a specific Kubernetes Namespace, if you wish. Each Context gets its own specific name that you can reference it by. So, for example, Context A would map User A to Cluster A, Context B would map User B to Cluster B, and so on. In this section you will list one or more Contexts, which are nothing more than a specific combination of a User & a Cluster. You will give each Cluster a specific name, and then specify the address to connect to and the SSL settings to use for each Cluster. In this section you will list one or more kubernetes clusters that you would like to connect to. You will give each User a specific name, and then you will specify the credentials to use for that account, whether that's a username/password combo, certificates, or tokens. In this section you will list one or more user accounts that you would like to use to connect to your Kubernetes clusters. Kubeconfig files are nothing more than YAML files that specify the following 3 items: 1 - Users But, how does kubectl know which clusters to connect to and how to authenticate to them? That's where kubeconfig files come in. Kubectl is the command-line tool that is used to interact with Kubernetes clusters.
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