What criterion must be met for this to be possible?
The AWS CodeDeploy agent installed on the Amazon EC2 instances must be able to access only the public AWS CodeDeploy endpoint.
The AWS CodeDeploy agent installed on the Amazon EC2 instances must be able to access only the public Amazon S3 service endpoint.
The AWS CodeDeploy agent installed on the Amazon EC2 instances must be able to access the public AWS CodeDeploy and Amazon S3 service endpoints.
It is not currently possible to use AWS CodeDeploy to deploy an application to Amazon EC2 instances running within an Amazon Virtual Private Cloud (VPC.)
Explanations:
The AWS CodeDeploy agent requires access to both the AWS CodeDeploy and Amazon S3 endpoints to function properly, not just the public AWS CodeDeploy endpoint.
While the AWS CodeDeploy agent needs access to Amazon S3, it also requires access to the AWS CodeDeploy endpoint. Thus, it cannot operate with access only to the S3 endpoint.
The AWS CodeDeploy agent must be able to access both the public AWS CodeDeploy and Amazon S3 service endpoints for successful deployments, making this option correct.
AWS CodeDeploy can be used to deploy applications to EC2 instances within a VPC, provided the necessary endpoint access is available.