An elastic image is an Amazon Machine Image (AMI) that is stored in one of Amazon data centres for use with the Elastic Bamboo feature. An elastic image is used to create elastic instances, which in turn create elastic agents. Conceptually, an elastic image is equivalent to an operating system running on a computer's boot hard drive and elastic instances would be the software that runs on this operation system.Each elastic image registered with the Amazon Web Services (AWS) has its own unique identifier, known as an AMI ID.
You can associate multiple elastic images with a Bamboo server. One default shared image is maintained by Atlassian in AWS, and is available to all Elastic Bamboo users.
You can also create your own custom elastic images.