How to setup Kubernetes Cluster in local

To setup the Kubernetes cluster in the local system, you have to use minikube. To setup minikube there are two ways Docker (or similarly compatible) container or a Virtual Machine environment. I will be using a Virtual machine to setup my minikube in this tutorial.

Prerequisites  to setup minikube

• 2GB of free memory
• 2 CPUs or more
• 20GB of free disk space
• Internet connection
• Container or virtual machine managers, such as Docker, Hyperkit, Hyper-V, KVM, Parallels, Podman, VirtualBox, or VMWare

Installation of minikube in Mac OS

Minikube requires that VT-x/AMD-v virtualization is enabled in BIOS. To check that this is enabled on OSX / macOS run the below command and if it gives an output then you are good to go.

$ sysctl -a | grep machdep.cpu.features | grep VMX

Install the VirtualBox as a HyperVisor using the homebrew package manager with the following command.

$ brew cask install virtualbox

Install Minikube with the following command.

$ brew install minikube

Run which minikube after installation, if it fails you may have to remove the old minikube link and link the newly installed binary.

$ brew unlink minikube
$ brew link minikube

You can also install by downloading minikube directly

x86

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-darwin-amd64
sudo install minikube-darwin-amd64 /usr/local/bin/minikube

ARM

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-darwin-arm64
sudo install minikube-darwin-arm64 /usr/local/bin/minikube

To start minikube with virtual box use below command

$ minikube start — driver=virtualbox

Check minikube status by running the below command

$ minikube status

Installation of minikube in Linux OS

Minikube supports 3 download options Binary download, Debian & RPM packages for different kinds of system architectures i.e  amd64/x86_64 & arm64/aarch64.

arm64 / aarch64:

Binary download

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-arm64
sudo install minikube-linux-arm64 /usr/local/bin/minikube

Debian package

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube_latest_arm64.deb
sudo dpkg -i minikube_latest_arm64.deb

RPM package

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-latest.aarch64.rpm
sudo rpm -ivh minikube-latest.aarch64.rpm

amd64 / x86_64:

Binary download

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
sudo install minikube-linux-amd64 /usr/local/bin/minikube

Debian package

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube_latest_amd64.deb
sudo dpkg -i minikube_latest_amd64.deb

RPM package

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-latest.x86_64.rpm
sudo rpm -ivh minikube-latest.x86_64.rpm

Installation of minikube in Windows

There are 3 ways to install minikube in windows

Windows Package Manager: If Windows Package Manager is installed in the system use the below command to install minikube.

winget install minikube

Chocolaty Package Manager: If the Chocolaty Package Manager installed, use the following command

choco install minikube

Stand Alone Windows Installer: You can download and run the Windows Installer

Create a deployment in Cluster

Create a namespace use below command

$ kubectl create namespace sample-app

set-context using the below command for the created namespace.

$ kubectl config set-context --current --namespace=sample-app

Create a deployment using a simple-web image, use the following command

$ kubectl create deployment myapp --image=yeasy/simple-web:latest

To list deployment use the following command

$ kubectl get deployment

To expose the service on port 80 use the following command.

$ kubectl expose deployment myapp --type=NodePort --port=80

To check the deployed application use the below command, which will open a page in a web browser.

$ minikube service myapp --namespace=sample-app

In-Browser

To scale up pods use the following command

$ kubectl scale deploymeny/myapp --replica=4

To create loadbalancer deployment use the following commands

$ kubectl create deployment myapp --image=yeasy/simple-web:latest

$ kubectl expose deployment myapp --type=LoadBalancer --port=80

In another window, start the tunnel to create routable IP for the ‘myapp’ deployment

$ minikube tunnel

To find the routable IP, run this command and examine the EXTERNAL-IP column:

$ kubectl get services myapp

Managing the Cluster

Browse the catalog of easily installed Kubernetes services

$ minikube addons list

Increase the default memory limit (it requires a restart after change)

$ minikube config set memory 9261

Create a second cluster running an older Kubernetes release:

$ minikube start -p aged --kubernetes-version=v1.16.1

Pause Kubernetes without impacting deployed applications:

$ minikube pause

Halt Kubernetes cluster:

$ minikube stop

Delete all of minikube clusters:

$ minikube delete --all

You can read more about Kubernetes Architecture in my another post Architecture of Kubernetes & OpenShift

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I hope you like this post, if you have any questions? please leave a comment below!