Amazon EC2 instance types

This topic explains the term instance type. When you create a new environment, Elastic Beanstalk provisions Amazon EC2 instances that are based on the Amazon EC2 instance types that you choose. The instance types that you choose determine the host hardware that runs your instances. EC2 instance types can be categorized by which processor architecture each is based on. Elastic Beanstalk supports instance types based on the following processor architectures: AWS Graviton 64-bit Arm architecture (arm64), 64-bit architecture (x86), and 32-bit architecture (i386). Elastic Beanstalk selects the x86 processor architecture by default when you create a new environment.

All of the instance types in the configuration for a given Elastic Beanstalk environment must have the same type of processor architecture. Assume that you add a new instance type to an existing environment that already has a t2.medium instance type, which is based on x86 architecture. You can only add another instance type of the same architecture, such as t2.small. If you want to replace the existing instance types with those from a different architecture, you can do so. But make sure that all of the instance types in the command are based on the same type of architecture.

Elastic Beanstalk regularly adds support for new compatible instance types after Amazon EC2 introduces them. For information about instance types that are available, see Instance types in the Amazon EC2 User Guide.