What should the company do to meet this new requirement with the LEAST effort?
Create a new AWS Cloud Development Kit (AWS CDK) stack that strictly provisions the existing VPC resources and configuration. Use AWS CDK to import the VPC into the stack and to manage the VPC.
Create a CloudFormation stack set that creates the VPC. Use the stack set to import the VPC into the stack.
Create a new CloudFormation template that strictly provisions the existing VPC resources and configuration. From the CloudFormation console, create a new stack by importing the Existing resources.
Create a new CloudFormation template that creates the VPC. Use the AWS Serverless Application Model (AWS SAM) CLI to import the VPC.
Explanations:
While using the AWS CDK to import the existing VPC can be done, it requires additional setup and might involve more manual configuration than simply using CloudFormation’s built-in import capabilities. This does not provide the least effort solution.
Creating a CloudFormation stack set to provision a new VPC is not necessary since the existing VPC needs to be imported rather than created anew. Stack sets are used for managing stacks across multiple accounts and regions, which adds unnecessary complexity in this context.
Creating a new CloudFormation template to import existing VPC resources is the most straightforward approach. The CloudFormation console provides a built-in feature for importing existing resources, allowing for minimal manual intervention while adhering to the requirement of managing the infrastructure automatically.
The AWS Serverless Application Model (AWS SAM) is primarily designed for serverless applications and does not provide capabilities for importing existing VPC resources. Additionally, it implies creating a new VPC, which is not aligned with the requirement to manage existing infrastructure.
As I see it, the answer is:
Create a new CloudFormation template that strictly provisions the existing VPC resources and configuration. From the CloudFormation console, create a new stack by importing the Existing resources.