Creating a basic plugin

In this section, let's create a simple plugin called toppods to show Kubernetes cluster nodes. It is just a very simple example of how to create the plugin:

1. We are going to create a simple bash-based plugin named kubectl-toppods:

   $ cat kubectl-toppods
   #!/bin/bash
   kubectl top pods

2. Let's copy the kubectl-toppods file to the ~/bin path:

   $ cp kubectl-toppods ~/bin

3. Make sure it is executable:

   $ chmod +x ~/bin/ kubectl-toppods

4. Now let's try to run it:

   $ kubectl toppods
   NAME                        CPU(cores)   MEMORY(bytes)
   postgresql-57578b68d9-6rpt8 1m           22Mi

Nice! You can see that the plugin is working, and it is not very difficult to create a kubectl plugin.