Spring Boot + Kubernetes Tutorial - Installing Kubectl, Minikube and Docker on Ubuntu

In a previous tutorial, we looked at the kubernetes architecture. For this tutorial we will be making use of Minikube. Minikube creates a simple local kubernetes cluster having one Virtual Machine. Also we will be installing kubectl which is a kubernetes command line tool to give commands to manage the kubernetes cluster.

Spring Boot + Kubernetes Tutorial
What is Kubernetes? Need for it?
Install Ubuntu on Windows using WSL 
Installing Kubectl, Minikube and Docker on Ubuntu
Create Docker Image
Deploy to Minikube Pods
Difference between ClusterIP, NodePort and LoadBalancer Service
Service Hello World Example

Implementation

Install Minikube

Previously we installed Ubuntu on Windows using WSL. We will be using this Ubuntu terminal for creating the minikube kubernetes cluster.

We will first download the minikube installable as follows -

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64

Then install the downloaded minikube installable -

chmod +x minikube-linux-amd64
sudo install minikube-linux-amd64 /usr/local/bin/minikube
which minikube

Let us now start minikube

minikube start

We get an exception. Minikube needs a hypervisor such as VirtualBox or Docker to create this VM. To provide minikube the required hyperv driver we will be installing docker.

sudo snap install docker
docker --version

If we now start minikube again it starts properly

minikube start --force

Install Kubectl

Next using a client side tool we will connect to kubernetes cluster to read, create, modify well known kubernetes resources (like pod, deployment, services). This client side tool is kubectl.

Download kubectl

curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"

Copy the kubectl exectuble to the bin folder.

chmod +x kubectl
cp kubectl /usr/local/bin/
which kubectl