Three-Tier-App-Deployment-EKS Overview

Three-tier Web Application using ReactJS, NodeJS, and MongoDB, with deployment on AWS EKS. In this project, we are going to create a Kubernetes cluster on AWS using Elastic Kubernetes Service. We are also going to create a private container registry using Elastic Container Registry and the Kubernetes cluster is exposed to the internet with the help of the Traefik ingress controller. Images will be built for the front end and the back end. These images will be pushed to the private ECR. EKS will pull these images and create a deployment.

Architecture

Step 1: IAM Configuration

Create a user eks-admin with AdministratorAccess.
Generate Security Credentials: Access Key and Secret Access Key.

Step 2: EC2 Setup

Launch an Ubuntu instance in your favourite region (eg. region us-west-2).
SSH into the instance from your local machine.

Step 3: 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

Step 4: Install Docker

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

Step 5: 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

Step 6: 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

Step 7: Setup EKS Cluster

eksctl create cluster --name three-tier-cluster --region us-west-2 --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

Step 8:

Change the env. value in k8s_manifests/frontend-deployment.yaml to http://app.<public_ip_kubernets_lb>.nip.io/api/tasks and host in traefik-ingress-controller/ingress.yaml to app.<public_ip_kubernets_lb>.nip.io. If you own a custom domain, create a subdomain and change app.<public_ip_kubernets_lb>.nip.io to your subdomain name. Learn more about https://nip.io/

Step 9: Run Manifests

kubectl create namespace workshop
kubectl apply -f .
kubectl delete -f .

Step 10: Install Traefik using helm.

helm repo add traefik https://helm.traefik.io/traefik
helm repo update
kubectl create namespace traefik
helm install traefik traefik/traefik -n traefik

Step 11:

Application is deployed on the AKS cluster. To access it run http://app.<public_ip_kubernets_lb>.nip.io/ or the sub domain on your custom domain provided during step 9

Cleanup

-To delete the EKS cluster: eksctl delete cluster --name three-tier-cluster --region us-west-2

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