Day - 31 : Launching your First Kubernetes Cluster with Nginx running

What is minikube?

Minikube is a tool which quickly sets up a local Kubernetes cluster on macOS, Linux, and Windows. It can deploy as a VM, a container, or on bare-metal.

Minikube is a pared-down version of Kubernetes that gives you all the benefits of Kubernetes with a lot less effort.

This makes it an interesting option for users who are new to containers, and also for projects in the world of edge computing and the Internet of Things.

Features of minikube

(a) Supports the latest Kubernetes release (+6 previous minor versions)

(b) Cross-platform (Linux, macOS, Windows)

(d) Multiple container runtimes (CRI-O, containerd, docker)

(e) Direct API endpoint for blazing fast image load and build

(f) Advanced features such as LoadBalancer, filesystem mounts, FeatureGates, and network policy

(g) Addons for easily installed Kubernetes applications

(h) Supports common CI environments

Task-01:

Install minikube on your local

Launch EC2 instance with Instance type as “t2.medium”. Install docker by using commands such as “sudo apt-get update” and “sudo apt-get install docker.io”.


 sudo usermod -aG docker $USER
sudo systemctl start docker
 sudo systemctl enable docker

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

After running the CURL command you will see minikube folder

Download the Minikube binary using curl Make it executable and move it into your path:

 chmod +x minikube
 sudo mv minikube /usr/local/bin/

To check version of miniKube

To confirm successful installation of both a hypervisor and Minikube, you can run the following command to start up a local Kubernetes cluster:

Now lets install kubectl which is command line tool

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

Make it executable and move it into your path

 chmod +x kubectl
 sudo mv kubectl /usr/local/bin/

Activating Minikube and Checking Status

minikube start --driver=docker

In below image, we used driver_name=docker, so first you need to install docker in your machine.

Once minikube start finishes, run the command below to check the status of the cluster:

minikube status

If you have previously installed Minikube, and run:

minikube start

and minikube start returned an error:

machine does not exist

then you need to clear minikube local state:

minikube delete

For log in to minikube use command:

minikube ssh

Pod:

Pods are the smallest deployable units of computing that you can create and manage in Kubernetes.

A Pod (as in a pod of whales or pea pod) is a group of one or more containers, with shared storage and network resources, and a specification for how to run the containers. A Pod's contents are always co-located and co-scheduled and run in a shared context. A Pod models an application-specific "logical host": it contains one or more application containers that are relatively tightly coupled.