From Zero to Kubernetes: Hosting a 3-Tier Web App with NGINX Ingress on EKS

What i will help you to Deploy🤔:

A production-ready full-stack web application, with (React frontend + Node.js backend + MongoDB Database),
deployed on AWS EKS using Kubernetes and exposed via NGINX Ingress Controller.

Prerequisites

• AWS account
• IAM Configuration
  • Create a user eks-admin with AdministratorAccess.
  • Generate Security Credentials: Access Key and Secret Access Key.
• Basic Docker and Kubernetes knowledge

Architecture of Deployment

Figure: High-level architecture showing React frontend, Node.js backend, and MongoDB database deployed on AWS EKS with NGINX Ingress Controller.

Launch a Bastion Host (EC2 t2.micro)

Note: This Bastion Host is not the part of EKS cluster, but we will use this instance to install neccessay configuration and EKS cluster.

Do these below steps in Bastion Host

• Install AWS CLI v2

  curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
  sudo apt install unzip
  unzip awscliv2.zip
  sudo ./aws/install -i /usr/local/aws-cli -b /usr/local/bin --update
  aws configure
  

• Install Docker

  sudo apt-get update
  sudo apt install docker.io
  docker ps
  sudo chown $USER /var/run/docker.sock
  

• Install Kubectl

  curl -o kubectl https://amazon-eks.s3.us-west-2.amazonaws.com/1.19.6/2021-01-05/bin/linux/amd64/kubectl
  chmod +x ./kubectl
  sudo mv ./kubectl /usr/local/bin
  kubectl version --short --client
  

• 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
  

• setup clusetr

  eksctl create cluster --name three-tier-cluster --region ap-south-1 --node-type t2.medium --nodes-min 2 --nodes-max 2
  aws eks update-kubeconfig --region us-west-2 --name three-tier-cluster
  kubectl get nodes
  

  Deploy the Application

  1. Clone the Repository

  git clone <your-repo-url>
  cd <repo-directory>

  2. Apply Kubernetes Manifests

  kubectl apply -f .

  2. Install Nginx Ingress Controller on AWS

  kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.11.1/deploy/static/provider/aws/deploy.yaml

  3. Get External IP of NGINX Ingress

  kubectl get svc -n ingress-nginx
  nslookup <external-ip>

  4. Update /etc/hosts

  Add the following line to your /etc/hosts file:

  <external-ip> your-app-domain.com
  

  5. Access the Application

  Open your browser and navigate to:

  http://your-app-domain.com
  

  5. Clean up

  Deleting cluster

  eksctl delete cluster --name three-tier-cluster --region ap-south-1