banking-eks-poc/ │ ├── terraform/ # Infrastructure as Code │ ├── main.tf │ ├── variables.tf │ ├── outputs.tf │ └── provider.tf │ ├── app/ # Banking Application │ ├── app.py │ ├── requirements.txt │ └── Dockerfile │ ├── k8s/ # Kubernetes manifests (GitOps) │ ├── deployment.yaml │ ├── service.yaml │ └── namespace.yaml │ ├── argo/ # Argo CD application manifest │ └── argo-app.yaml │ ├── Jenkinsfile # Jenkins CI/CD pipeline │ └── README.md ----------------- Prerequisites AWS Account IAM User with: EC2,VPC,ECR,IAM Key Pair

EC2 or local machine with: kubectl eksctl terraform docker

AWS CLI configured

Terraform-based EKS (for production-style POC) terraform/main.tf terraform init terraform apply ✔ Creates 1 Master + 2 Worker nodes

5️⃣ Step 2: Create Banking Application Simple Flask app simulating banking microservice:

Step 3: Push Docker Image to AWS ECR aws ecr create-repository --repository-name banking-app

aws ecr get-login-password | docker login --username AWS --password-stdin .dkr.ecr.ap-south-1.amazonaws.com

docker build -t banking-app . docker tag banking-app:latest <ECR_URL>/banking-app:1.0 docker push <ECR_URL>/banking-app:1.0

Step 4: Kubernetes Manifests (GitOps Repo) deployment.yaml service.yaml

Step 5: Install Argo CD on EKS kubectl create namespace argocd kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml

Port-forward Argo CD UI: kubectl port-forward svc/argocd-server -n argocd 8080:443

Get initial password: kubectl get secret argocd-initial-admin-secret -n argocd -o jsonpath="{.data.password}" | base64 -d

Step 6: Create Argo CD Application argo-app.yaml: kubectl apply -f argo-app.yaml Argo CD will automatically deploy the banking app to EKS.

Step 7: Verify Deployment kubectl get pods -n banking kubectl get svc -n banking Access application via LoadBalancer URL.

step 8---Autoscaling Pod Auto Scaling: kubectl autoscale deployment banking-app --cpu-percent=50 --min=2 --max=10

Node Auto Scaling: Managed Node Group auto-scales automatically based on cluster load.

Step 9: CI Pipeline (Jenkins) Jenkinsfile example: Argo CD will pick up changes automatically.