Question

Is it necessary to create kubernetes cluster using minicube? Or how it happens in real time?

Answer 1

Minikube is a tool that lets you use a Kubernetes cluster locally. It lets you create a single node cluster inside a VM on your laptop. It's mainly used for people who have recently started learning Kubernetes and who like to experiment.
Minikube also requires you to set up a cluster.

Have a look at this is understand how to set up a cluster on a Linux system.

https://www.edureka.co/community/39047/how-do-i-set-up-a-minikube-cluster-on-ubuntu