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Add ECS_PROPAGATE_TASK_MEMORY_LIMIT_CGROUPV2 opt-in config - #4986
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mye956
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Jun 2, 2026
harishxr
approved these changes
Jun 2, 2026
danehlim
enabled auto-merge (rebase)
June 2, 2026 18:48
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Summary
On cgroup v2, task-level memory limits set via ECS are not visible to containers the way they are on cgroup v1 due to the way upstream Docker and cgroupv2 are currently designed.
Add a new opt-in enviornment variable
ECS_PROPAGATE_TASK_MEMORY_LIMIT_CGROUPV2which propagates task-level memory limits to containers that do not have explicit container-level memory limits when using cgroupv2.Implementation details
When enabled and on cgroupv2, ECS Agent sets each container's memory limit to the task-level value if the container does not already have an explicit memory limit.
Testing
New tests cover the changes: yes
Description for the changelog
Feature - Add ECS_PROPAGATE_TASK_MEMORY_LIMIT_CGROUPV2 opt-in config
Additional Information
Does this PR include breaking model changes? If so, Have you added transformation functions?
No
Does this PR include the addition of new environment variables in the README?
No
Licensing
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.