AWS Config Rule: EC2 Instances In VPC

Description: Checks if your EC2 instances belong to a virtual private cloud (VPC). Optionally, you can specify the VPC ID to associate with your instances.

Trigger type: Configuration changes

AWS Region: All supported AWS regions except Asia Pacific (Jakarta), Africa (Cape Town), Middle East (UAE), Asia Pacific (Hyderabad), Asia Pacific (Osaka), Asia Pacific (Melbourne), Europe (Milan), Europe (Spain), Europe (Zurich) Region

You might think, how can I create an Amazon EC2 Instance outside of a VPC? Years ago, this was possible and you might have some EC2-Classic style instances such as m1 family instances which could have been created outside of an Amazon VPC.

Lately, it is not possible to launch an Amazon EC2 Instance into an Amazon Virtual Private Cloud (VPC)

If you still have old EC2 Instances that need to be moved within an Amazon VPC you own however, you can make use of the AWS Application and Migration Service (AWS MGN) to migrate your instances (and/or databases) from EC2-Classic to VPC with minimal downtime.

Note: EC2-Classic is scheduled to be retired on August 15, 2022

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