DefaultAmiArm
Default Amazon Machine Image (AMI) for ARM64-based Rack instances. This ensures ARM-based racks always use the latest ECS-optimized AMI unless manually overridden.
| Default value | /aws/service/ecs/optimized-ami/amazon-linux-2/arm64/recommended/image_id |
| Allowed values | AWS SSM AMI path (e.g., /aws/service/ecs/optimized-ami/amazon-linux-2023/arm64/recommended/image_id) |
If your rack runs on ARM64 architecture, it will use the Amazon Linux 2 (AL2) ARM64 ECS-optimized AMI by default. You can switch to Amazon Linux 2023 for ARM by setting:
$ convox rack params set DefaultAmiArm="/aws/service/ecs/optimized-ami/amazon-linux-2023/arm64/recommended/image_id"
If the Ami rack parameter is set, DefaultAmiArm will be ignored, and the explicitly set Ami value will be used instead.
Use Cases
- Upgrade ARM64 racks to Amazon Linux 2023 for extended support and updated packages.
- Run cost-efficient Graviton-based instances (e.g.,
t4g,m6g,c7g) with the correct ARM-optimized AMI. - Test a new ARM64 AMI path before applying it across production racks.
Additional Information
Like DefaultAmi, this value is an AWS Systems Manager (SSM) parameter path that auto-resolves to the latest recommended AMI ID. Your Rack instances will receive updated AMIs on the next instance replacement without manual intervention.
ARM64 instances such as the AWS Graviton family offer improved price-performance for many workloads. Ensure your application containers are built for the arm64 architecture when using ARM-based instance types.
See Also
- DefaultAmi
- Ami
- InstanceType
- Rack Parameters for a full list of available parameters
