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Amazon Machine Images (AMIs)

This document covers how to find the AMIs compatible with Graviton, and how to lookup and use the AMIs in AWS System Manager and Cloud Formation.

Amazon Linux 2

Using the console

Amazon Linux 2 AMIs can be found in the console as explained in the AWS documentation when launching instances interactively.

Using APIs - AWS Systems Manager Parameter Store

When integrating the AMI lookup process in a script or in a piece of code, it is more convenient to leverage AWS Systems Manager Parameter Store.

There's a good article about it on the AWS Compute blog: Query for the latest Amazon Linux AMI IDs using AWS Systems Manager Parameter Store.

For Graviton2/arm64 Amazon Linux 2 AMIs, the namespace is the following:

  • Parameter Store Prefix (tree): /aws/service/ami-amazon-linux-latest/
  • AMI name alias: amzn2-ami-hvm-arm64-gp2

Here is an example to get the AMI_ID of the latest Amazon Linux 2 version in us-east-1:

$ aws ssm get-parameters --names /aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-arm64-gp2 --region us-east-1 --query "Parameters[].Value" --output text

AWS CloudFormation also supports Parameter Store, and here is an example on how you can add a reference to the latest Graviton2/arm64 Amazon Linux 2 AMI in a CloudFormation template:

Parameters:
  LatestAmiId:
    Type: 'AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>'
    Default: '/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-arm64-gp2'

Resources:
 Graviton2Instance:
    Type: 'AWS::EC2::Instance'
    Properties:
      ImageId: !Ref LatestAmiId
      InstanceType: 'c6g.medium'