AWS-Elastic Kubernetes Service

Amazon Elastic Kubernetes Service (Amazon EKS) is a managed Kubernetes service that makes it easy for you to run Kubernetes on AWS and on-premises.

Kubernetes is an open-source system for automating deployment, scaling, and management of containerized applications.

Benefits of EKS

Scalability

High Availability

Easy management

EKS is not free click Pricing Calculator of EKS.

Prerequistics

1. Ec2 Instance
2. IAM

Eksctl is used to manage AWS resources (including the EKS cluster itself) and is AWS-specific. It talks to AWS API endpoints and is more of a replacement for the AWS CLI.

Kubectl is an official part of Kubernetes and is used to query and manipulate Kubernetes resources, so it works on any Kubernetes cluster

EKS cluster created three ways

1. Console of AWS

2. Eksctl

3. Terraform

Two type of node

1. On demand
2. Spot Instance

Setting up Amazon EKS

Launch Ec2 instance — US West (Oregon)us-west-2

Create a IAM user with Admin permission

Install aws cli

curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
sudo apt install unzip
unzip awscliv2.zip
sudo ./aws/install

Check aws cli version aws — version

Configure the IAM user account — Goto IAM user — Security credentials — Create a access key — Comand line interface — Create

Install eksctl

curl --silent --location "https://github.com/weaveworks/eksctl/releases/latest/download/eksctl_$(uname -s)_amd64.tar.gz" | tar xz -C /tmp
sudo mv /tmp/eksctl /usr/local/bin
eksctl version

Download kubectl

curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl.sha256"
echo "$(cat kubectl.sha256)  kubectl" | sha256sum --check

Install kubectl

sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl

Cluster create eksctl

eksctl create cluster --name ibbus-cluster --region us-west-2 --node-type t2.medium --nodes-min 2 --nodes-max 3

It will take more than 15 minutes created cluster

How many nodes run on EKS cluster

kubectl get nodes

kubectl get nodes
kubectl get pods
kubectl get pods -n kube-system

Pods like → container

Namespace means → group of pods running

Pod create

apiVersion: v1
kind: Pod
metadata:
  name: nginx
spec:
  containers:
  - name: nginx
    image: nginx:1.14.2
    ports:
    - containerPort: 80

kubectl apply -f nginx-pod.yml

Pod running

kubectl get pods

Nginx where its running? Nodes

Kubectl running default namespace

kubectl get pods -n default
kubectl get all -n default

Open the web browser from the local machine and access type the Kubernetes node IP along with the Node port.

We are able to access the Nginx homepage successfully. It’s a containerized web server listening in the port 80 and we mapped it to 30080 in every node in the cluster.

First delete the pod

kubectl delete -f .

How to delete the EKS Cluster

eksctl delete cluster --name ibbus-cluster --region us-west-2