ami. The Amazon Machine Image (AMI) to run on the EC2 Instance. You can find free and paid AMIs in the AWS Marketplace or create your own using tools such as Packer. The preceding code sets the ami parameter to the ID of an Ubuntu 20.04 AMI in us-east-2. This AMI is free to use. Please note that AMI IDs are different in every AWS region, so if you change the region parameter to something other than us-east-2, you’ll need to manually look up the corresponding Ubuntu AMI ID for that region, and copy it into the ami parameter.

instance_type. The type of EC2 Instance to run. Each type of EC2 Instance provides a different amount of CPU, memory, disk space, and networking capacity. The EC2 Instance Types page lists all the available options. The preceding example uses t2.micro, which has one virtual CPU, 1 GB of memory, and is part of the AWS Free Tier.