KUBERNETES

Extending kubectl



*Kubectl Plugin*

As you probably already know, kubectl is the official tool to interact with Kubernetes from the command line. This tool, besides all the functionality that it already provides, allows us to extend its functionality through plugins.

A kubectl plugin is nothing but a file with the following three requirements:

• It has to be an executable (binary or script)
• It must be in your system’s PATH
• Its name must start with kubectl- (including the dash!)

The plugin system in kubectl was introduced as alpha in version 1.8.0 and it was rewritten in version 1.12.0, which is the minimum version recommended if you are going to play with this feature.

How kubectl uses Kubernetes API



*kubectl Fuente: https://blog.risingstack.com/what-is-kubernetes-how-to-get-started/*

As you probably already know, any type of query or command that you run against Kubernetes , it is done by sending an API request to a component called API server. This component lives in the master node/s.



*Fuente: https://blog.openshift.com/kubernetes-deep-dive-api-server-part-1/*

The most common way to interact with a Kubernetes cluster, although you have several graphical options, it is through a command line tool called kubectl.