Overview The year is 2021 and you’re still building virtual machines. Yes, you read that right, but it’s not always a bad thing. There are few scenarios where you might consider using a virtual machine over a container (or function.) Maybe AWS doesn’t provide a hosted solution for the technology you want to use, maybe you want to do multi-cloud and the cloud provider’s offerings are too different to manage. Packer can help you build and maintain custom virtual machine images.