AWS Mastery for .NET Architects

Lesson 30 of 30 100% of course

Case Study: Migrating a legacy Monolith to a Cloud-Native AWS stack

Sign in to track progress and bookmarks.

The Migration Journey

The Case: A 10-year-old .NET Framework 4.5 monolith running on a single Windows Server 2012. It crashes once a week and cannot handle traffic spikes.

1. Phase 1: Re-platform (Modernize)

We migrated the code to **.NET 8** and containerized it using Docker. This allowed us to move from expensive Windows EC2 instances to high-performance **Linux Fargate** tasks.

2. Phase 2: Decouple (Cloud-Native)

We moved the file uploads to **S3**, the session state to **ElastiCache (Redis)**, and the main database to **Amazon Aurora**. We added an **ALB** for high availability across 3 Availability Zones.

3. The Result

The application now scales automatically from 2 to 50 containers. Uptime improved from **98%** to **99.99%**. The team now deploys 5 times a day instead of once a month. The monolith is now a distributed, cloud-native workhorse.

AWS MASTERY FOR .NET ARCHITECTS COMPLETE.

The Cloud is your playground. You have the tools to build, secure, and scale anything on the world's largest infrastructure platform.

Interview Q&A for this course

Test your knowledge

Quizzes linked to this course—pass to earn certificates.

Microsoft Azure — Practice Quiz

Test your understanding of Microsoft Azure Tutorial. App Service, storage, SQL, and identi…

Intermediate 15 min

Cloud Computing — Practice Quiz

Test your understanding of Cloud Computing Tutorial. IaaS, PaaS, SaaS, and cloud architect…

Intermediate 15 min

AWS Cloud — Practice Quiz

Test your understanding of AWS Cloud Tutorial. EC2, S3, RDS, and deploy .NET on AWS.

Intermediate 15 min

Browse all quizzes

Previous Take a quiz

On this page

1. Phase 1: Re-platform (Modernize) 2. Phase 2: Decouple (Cloud-Native) 3. The Result AWS MASTERY FOR .NET ARCHITECTS COMPLETE.

1. AWS Global Infrastructure

AWS Foundations: Regions, Availability Zones, and Edge Locations VPC Deep Dive: Subnets, Route Tables, and Internet Gateways IAM (Identity and Access Management): The Principle of Least Privilege Security Groups vs Network ACLs: Handling traffic for .NET apps

2. Compute for .NET

EC2 (Elastic Compute Cloud): Choosing the right instance for C# apps AWS Lambda: Serverless .NET with Native AOT ECS & Fargate: Containerizing .NET APIs at scale Auto Scaling Groups: Handling spikes in traffic

3. Storage & Databases

S3 (Simple Storage Service): Architecting a binary storage layer RDS (Relational Database Service): Managed SQL Server in the cloud DynamoDB Mastery: NoSQL for extreme scale ElastiCache: Boosting performance with Redis/Memcached

4. Networking & Content Delivery

Route 53: DNS management and health checks Application Load Balancer (ALB) vs Network Load Balancer (NLB) CloudFront: Accelerating frontend delivery via CDN API Gateway: Building a unified entry point for Microservices

5. Security & Compliance

AWS WAF: Protecting your APIs from common web attacks AWS Secrets Manager: Managing connection strings securely KMS (Key Management Service): Data encryption for .NET CloudTrail: Auditing your infrastructure changes

6. Messaging & Events

SQS (Simple Queue Service): Decoupling .NET services SNS (Simple Notification Service): Pub/Sub patterns in AWS EventBridge: Building an event-driven bus Step Functions: Orchestrating complex serverless workflows

7. Monitoring & DevOps

CloudWatch: Metrics, Logs, and Alarms for C# apps X-Ray: Distributed tracing for .NET Microservices AWS CodePipeline: CI/CD for .NET on AWS CloudFormation & CDK: Infrastructure as Code (IaC) with C#

8. Optimization & Scale

Cost Optimization (FinOps): Reducing your monthly AWS bill Case Study: Migrating a legacy Monolith to a Cloud-Native AWS stack