DMS replication instances on an End-of-Life engine version — EOL March 31, 2027 (3.5.4); already passed for older versions

AWSDeprecations & retirementsTeam planSeverity: highaws.dms-instance

AWS DMS replication instances on engine versions that are past End of Life or reach it on March 31, 2027; DMS upgrades them automatically in the maintenance window

What LeftSize checks

Find AWS DMS replication instances on engine versions that are past or approaching End of Life.

Why it matters

Missed retirement and end-of-support dates turn into forced upgrades, outages or extended support charges at a moment you did not choose.

What you get in the GitHub issue

LeftSize runs this check from a scheduled GitHub Action with a read-only identity in your AWS account and opens one issue per scope, updated on every scan. The issue includes:

  • The affected resources, grouped per subscription, resource group or account and region
  • Background on why it was flagged and when it is a false positive
  • Cost and operational impact of fixing it
  • Alternative approaches and their trade-offs
  • Step-by-step remediation with safety checks
  • Ready-to-run fix scripts (CLI, PowerShell or Terraform where available)
  • Snooze, ignore or report a finding with a comment on the issue
Install LeftSizeIncluded in the Team and Business plans.

Official references