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AWS AmazonECS documentation change

Service: AmazonECS · 2025-12-25 · Documentation medium

File: AmazonECS/latest/developerguide/ManagedInstances.md

Summary

Clarified instance replacement process and security practices for Managed Instances

Security assessment

Changes emphasize security compliance through automatic instance rotation (14-day lifecycle) and patching practices. While security-related, this documents existing security features rather than addressing new vulnerabilities.

Diff

diff --git a/AmazonECS/latest/developerguide/ManagedInstances.md b/AmazonECS/latest/developerguide/ManagedInstances.md
index 6f36fdd7d..cd2fa1683 100644
--- a//AmazonECS/latest/developerguide/ManagedInstances.md
+++ b//AmazonECS/latest/developerguide/ManagedInstances.md
@@ -107 +107 @@ The following are key features of Amazon ECS Managed Instances:
-  * Ensure security compliance and regular patching with a maximum instance lifetime of 14 days, after which tasks are automatically migrated to new instances.
+  * Ensure security compliance and regular instance patching. ECS Managed Instances initiates instance draining after 14 days and automatically replaces service-based tasks to new instances.
@@ -139 +139 @@ Amazon ECS Managed Instances implements multiple layers of security to protect y
-  * **Limited instance lifetime** \- The maximum lifetime of a running instance is 14 days, ensuring your applications run on appropriately configured instances with up-to-date security patches.
+  * **Limited instance lifetime** \- ECS automatically initiates instance draining after 14 days, ensuring your applications run on appropriately configured instances with up-to-date security patches.
@@ -254 +254 @@ Consider the following when planning your migration:
-  * Applications should tolerate the 14-day maximum instance lifetime and planned maintenance windows.
+  * Applications should tolerate the 14-day instance lifetime and planned maintenance windows.