Instance Refresh Support Integrated into AWS CloudFormation for EC2 Auto Scaling

AWS CloudFormation introduced an update policy enabling automatic EC2 Auto Scaling instance refreshes during stack updates requiring instance replacement.

By Daniel Brooks · Editorial pseudonym · 2026-07-29 · 1 min read

AI-ASSISTED REPORTING · RETROSPECTIVE ARCHIVE

Retrospective edition: 2026-07-29. Source published: 2026-07-29. Added to this archive: 2026-11-03. This briefing was prepared later from the linked announcement; it was not published on this website on the historical edition date.

The new AutoScalingInstanceRefresh update policy allows CloudFormation to trigger instance refreshes when updating Auto Scaling groups with properties that require replacement. This supports capabilities like replacing root volumes, launch-before-terminate strategies, and monitoring alarms during the refresh process.

Throughout these updates, Auto Scaling policies and health checks remain active, maintaining service health. Rollbacks are managed via CloudFormation stack rollback processes. This feature is broadly available across all AWS regions at no extra charge.

Source & further reading

Amazon EC2 Auto Scaling now supports Instance Refresh in CloudFormation ↗

Source published 2026-07-29. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.