# Kubernetes for Developers
# Why another tutorial?
Getting started with Kubernetes is not easy, there is quite a learning curve before most people feel comfortable interacting and/or managing their cluster.
The tutorial is aimed at developers with no previous experience of Kubernetes, however it assumes some basic knowledge of docker/containers, networking and web applications.
This is adapted from the official tutorials found in the Kubernetes documentation and the katacoda online courses.
# Following the tutorial
Through the tutorial you will see plenty of code blocks showcasing commands you are meant to execute in your own terminal, for example:
$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
minikube Ready master 37m v1.18.0
The line that starts with $ contains the command you are meant to execute, such as kubectl get nodes and the rest is the sample output.
- Sometimes you will see multiple commands in the same block. Each will begin with the
$prompt. - Some of the command output like IPs will most likely be different in your local machine
# Local environment setup
The very first thing we will need to do is to setup our machine with the necessary tools to follow along the tutorial.
- We will create our own personal Kubernetes cluster using minikube. This is an official Kubernetes tool for learning, experimenting and prototyping that creates a single node Kubernetes cluster in your local machine.
- We will use kubectl, the official Kubernetes CLI tool, in order to interact with the cluster
- You will run lots of commands in a terminal, so make sure you have a good terminal installed!
The Kubernetes official documentation has step by step instruction on how to get your local learning environment setup regardless of your OS: https://kubernetes.io/docs/setup/learning-environment/minikube/.
Let us add some additional advice:
- We recommend using package managers such as Homebrew (Mac) and Chocolatey (Win) as the easiest setup, but you have more options in the full official instructions linked above.
- You can also try to follow through the tutorial using the Katacoda online environment. This will let you follow without having to locally install kubectl and minikube, directly interacting with the cluster through the website. However, you might experience some limitations/differences that we will try to point out during the tutorial.
Do you already have a local cluster setup in a different way than minikube? Thats fine too. As long as you have a cluster that you can play with, you will be able to follow along.
# Installation in Mac using Homebrew
$ brew install kubectl
$ brew install minikube
# Installation in Windows using Chocolatey
$ choco install kubernetes-cli
$ choco install minikube
# Follow online using Katacoda
Complete the following online Katacode tutorial where you will deploy a Kubernetes cluster using minikube: https://www.katacoda.com/courses/kubernetes/launch-single-node-cluster
Make sure you don't close the window once you reach the end of the tutorial, you will use it to follow along the rest of our tutorial.
Katacode online environments expire after minutes without activity. If this happens you will need to complete again the steps in the Katacoda tutorial plus any steps of this tutorial to go back to the point you were