Migration of a Workload running in a Corporate Data Center to AWS using the Amazon EC2 and RDS service

In another project based on a real-world scenario, I acted as the Cloud Specialist responsible for migrating a workload running in a Corporate DataCenter to AWS.

The application and database were migrated to AWS using the Lift & Shift (rehost) model, moving both application and database data.

I followed some migration steps:

• Planning (sizing, prerequisites, resource naming)
• Execution (resource provisioning, best practices)
• Go-live (validation test — Dry-run, final migration — Cutover)
• Post Go-live (ensure the operation of the application and user access)

It's important to note that the work was not just about moving the application server and the database to the cloud.

In cloud architecture, it is always a good practice to create private and public networks to control the access to servers. For this reason, 2 subnets were created using Amazon VPC(Virtual Private Cloud).

The Public Subnet — with the appropriate firewall rules — allows access to the application server(EC2 instance) by users.

The Private Subnet — with a firewall rule — allows the application server access to the database(Amazon Relational Database Service).

The system architecture and the network infrastructure are shown below.