
Amazon ECS now improves service availability during rolling deployments by replacing unhealthy tasks with the same version instead of the new version, and applies auto-scaling to both versions to maintain performance even when new deployments fail.


<div><p>This article announces enhancements to Amazon ECS that improve service availability during rolling deployments.</p><ul><li>Unhealthy or terminated tasks now replaced with same service version, not new version</li><li>Maintains availability when new version tasks fail or cannot launch successfully</li><li>Application Auto Scaling now applies scale-out to both service revisions during deployments</li><li>Respects existing maximumPercent and minimumHealthyPercent configuration settings</li><li>Enabled by default for all rolling deployment strategy services across all AWS Regions</li></ul><p>These enhancements ensure service availability is maintained even when new deployments encounter failures or scaling events.</p></div>


Amazon ECS improves Service Availability during Rolling deployments

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