Guidance to migrate Amazon RDS MySQL databases to Amazon VPC
Amazon Relational Database Service (Amazon RDS) makes it easy to:
If your AWS account was created before 2013, you might be running Amazon RDS MySQL in an Amazon Elastic Compute Cloud (EC2)-Classic environment, and may be looking to migrate Amazon RDS into an Amazon EC2-Amazon Virtual Private Cloud (VPC) environment.
This white paper outlines the requirements and detailed steps needed to migrate Amazon RDS MySQL databases from EC2-Classic to EC2-VPC with minimal downtime using RDS MySQL Read Replicas and ClassicLink.
This is part of the essential reading to get you up to speed provided by AWS