DevOps4UA

🚀 AWS Multi-Region Disaster Recovery Architecture (Production-Grade)

Jenkins

Source: Dev.to | Jan 22, 2026 (UTC)

📌 Overview

In real-world systems, downtime is not an option. Cloud applications must survive instance failures, service outages, and even full regional failures.

In this blog, I’ll walk you through a hands-on AWS Multi-Region Disaster Recovery (DR) architecture that automatically shifts traffic to a secondary region without manual intervention.

This project simulates how enterprise systems survive regional outages.

🏗️ Architecture Diagram

🔧 Architecture Components

Primary Region (ap-south-1)

  • Application Load Balancer (ALB)
  • Auto Scaling Group (EC2 instances from AMI)
  • Amazon RDS (Primary)
  • Amazon EFS (Shared storage)

Disaster Recovery Region (us-east-1)

  • Application Load Balancer (ALB)
  • Auto Scaling Group (EC2 from copied AMI)
  • Amazon RDS Read Replica
  • Amazon EFS backup / replicated data

Global Services

  • Amazon Route 53 (DNS Failover & Health Checks) ## 🔄 Disaster Recovery Flow
  1. User traffic enters through Amazon Route 53
  2. Route 53 routes traffic to Primary ALB (ap-south-1)
  3. Health checks continuously monitor application health
  4. On failure detection:
    • Route 53 redirects traffic to DR ALB (us-east-1)
    • Auto Scaling launches EC2 instances from copied AMI
    • RDS Read Replica is promoted to Primary
  5. Application becomes available from DR region without manual intervention

📂 Implementation Details

Detailed, step-by-step implementation guides with screenshots and diagrams
are available in the /steps directory:

  • EC2 & AMI creation
  • ALB & Auto Scaling setup
  • Route 53 DNS failover
  • RDS cross-region replication & promotion
  • EFS backup strategy

Step 1: EC2 & AMI Setup (Primary Region)

In this step, we launch an EC2 instance in the primary region
(ap-south-1) and deploy an NGINX application.

Objective

Launch an EC2 instance and prepare a reusable AMI for Auto Scaling and DR.

Why This Step?

  • EC2 hosts the application
  • AMI ensures consistent server configuration
  • Enables fast recovery in another region

Services Used

  • EC2
  • AMI
  • Security Groups

Implementation Steps

1️⃣ Launch EC2

  • Region: ap-south-1
  • AMI: Amazon Linux 2
  • Instance type: t2.micro
  • Security Group:
    • SSH (22)

    – HTTP (80)

2️⃣ Install Application

sudo yum install nginx -y sudo systemctl start nginx

Enter fullscreen mode

Exit fullscreen mode

Verify Application

Open browser

http://<ec2-public-ip>

Enter fullscreen mode

Exit fullscreen mode

Create AMI

OUTCOME

Step 2: ALB & Auto Scaling Setup

Objective

Ensure high availability and self-healing EC2 infrastructure.

Why This Step?

Services Used

Implementation Steps

1️⃣ Create Target Group

2️⃣ Create Application Load Balancer


3️⃣ Create Launch Template

4️⃣ Create Auto Scaling Group

Outcome

Step 3: Route 53 Failover Routing

Route 53 continuously monitors the health of the primary ALB
and redirects traffic to the DR region during failure.

Objective

Automatically route traffic to DR region during failure.

Why This Step?

Services Used

Implementation Steps

1️⃣ Create Hosted Zone

Domain:
riteshdev.me

2️⃣ Create Health Check

3️⃣ Create DNS Records

Primary Record

Secondary Record

Outcome

Step 4: RDS Disaster Recover

A cross-region read replica is maintained and promoted during
regional failure.

Objective

Protect application data using cross-region replication.

Why This Step?

Services Used

Implementation Steps

1️⃣ Create Primary RDS

2️⃣ Create Read Replica

3️⃣ Promote Replica (DR Test)

Outcome

🎯 Key Objectives

🛠️ AWS Services Used

Category

Services

Compute

EC2, AMI, Auto Scaling

Networking

VPC, ALB, Route 53

Storage

EBS Snapshots, EFS

Database

RDS (Primary + Cross-Region Read Replica)

Security

IAM, Security Groups

Monitoring

Route 53 Health Checks

🌍 Regions Used

📁 Project Structure

aws-multi-region-dr/ │ ├── architecture/ │ └── dr-architecture.png │ ├── steps/ │ ├── ec2-setup.md │ ├── alb-asg.md │ ├── route53.md │ └── rds-dr.md │ ├── screenshots/ │ └── README.md

Enter fullscreen mode

Exit fullscreen mode

🔄 Disaster Recovery Flow

✅ No manual intervention required

🧪 Failure Scenarios Tested

➡ Result: Application remained accessible via the DR region

📊 RTO & RPO (Design Targets)

Metric

Value

RTO (Recovery Time Objective)

~1–2 minutes

RPO (Recovery Point Objective)

Seconds (replication lag)

💡 Why This Project Stands Out

This project simulates how enterprise systems survive regional outages.

🧠 Key Learnings

🚀 Future Enhancements

📣 About the Author

Ritesh

Aspiring Cloud & DevOps Engineer

Focused on building resilient, scalable, and secure AWS architectures

⭐ For Recruiters

This repository demonstrates:

📌 Please explore the **/steps directory

For further actions, you may consider blocking this person and/or reporting abuse

Залишити відповідь

Ваша e-mail адреса не оприлюднюватиметься. Обов’язкові поля позначені *

Читайте також