AWS batch documentation change
Summary
Updated migration guidance to reference the new deprecation timeline, specifically the June 30, 2026 block on new AL2 environments, and added a link to track migration via AWS Health planned lifecycle events.
Security assessment
The change updates procedural documentation for migrating to a newer AMI, aligning with the deprecation schedule. It reinforces the recommendation to migrate 'to maintain optimal performance and security' and references the deprecation page which details the security implications. This adds to the security documentation by guiding users away from an unsupported, and thus less secure, platform.
Diff
diff --git a/batch/latest/userguide/ecs-migration-2023.md b/batch/latest/userguide/ecs-migration-2023.md index 1e558e999..990310f51 100644 --- a//batch/latest/userguide/ecs-migration-2023.md +++ b//batch/latest/userguide/ecs-migration-2023.md @@ -11 +11,7 @@ AL2023 is a Linux-based operating system designed to provide a secure, stable, a -Starting in January 2026, AWS Batch will change the default AMI for new Amazon ECS compute environments from Amazon Linux 2 to Amazon Linux 2023 because AWS will be [ending support for Amazon Linux 2](https://aws.amazon.com/amazon-linux-2/faqs/). The default AMI is used when you don't specify a value for the [imageType.Ec2Configuration](https://docs.aws.amazon.com/batch/latest/APIReference/API_Ec2Configuration.html) field when creating a new compute environment. We recommend migrating AWS Batch Amazon ECS compute environments to Amazon Linux 2023 to maintain optimal performance and security. +###### Important + +Effective June 30, 2026, AWS Batch will block creation of new Amazon ECS compute environments using Batch-provided Amazon Linux 2 AMIs. We strongly recommend migrating your existing AWS Batch Amazon ECS compute environments to Amazon Linux 2023 prior to this date. For more information, see [Amazon ECS Amazon Linux 2 AMI deprecation](./ecs-al2-ami-deprecation.html). + +On January 12, 2026, AWS Batch changed the default AMI for new Amazon ECS compute environments from Amazon Linux 2 to Amazon Linux 2023 because AWS is [ending support for Amazon Linux 2](https://aws.amazon.com/amazon-linux-2/faqs/). The default AMI is used when you don't specify a value for the [imageType.Ec2Configuration](https://docs.aws.amazon.com/batch/latest/APIReference/API_Ec2Configuration.html) field when creating a new compute environment. We recommend migrating AWS Batch Amazon ECS compute environments to Amazon Linux 2023 to maintain optimal performance and security. + +You can track the migration status of your affected Amazon ECS compute environments using AWS Health planned lifecycle events. For more information, see [AWS Health Planned lifecycle events](./batch-planned-lifecycle-events.html).