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fix(ecs): allow empty placementStrategies on EC2Service#35580

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mergify[bot] merged 5 commits intoaws:mainfrom
isker:ecs-empty-placementstrategies
Nov 10, 2025
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fix(ecs): allow empty placementStrategies on EC2Service#35580
mergify[bot] merged 5 commits intoaws:mainfrom
isker:ecs-empty-placementstrategies

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@isker isker commented Sep 26, 2025 •
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Reason for this change

You can't remove placement strategies from an ECS service using CDK once they've been set.

Description of changes

Same fix as #30382 but for placementStrategies. Apparently this was not done at that time because CloudFormation previously did not have the appropriate semantics for setting PlacementStrategies to the empty array as it did for PlacementConstraints, but that is no longer the case. The CloudFormation docs state:

To remove this property from your service resource, specify an empty PlacementStrategy array.

Describe any new or updated permissions being added

N/A

Description of how you validated changes

Unit and integration tests.

Checklist

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

@github-actions github-actions bot added the p2 label Sep 26, 2025
@aws-cdk-automation aws-cdk-automation requested a review from a team September 26, 2025 01:28
@github-actions github-actions bot added the repeat-contributor [Pilot] contributed between 3-5 PRs to the CDK label Sep 26, 2025
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(This review is outdated)

@isker isker changed the title fix(aws-ecs): allow empty placementStrategies on EC2Service fix(ecs): allow empty placementStrategies on EC2Service Sep 26, 2025
@aws-cdk-automation aws-cdk-automation dismissed their stale review September 26, 2025 01:37

✅ Updated pull request passes all PRLinter validations. Dismissing previous PRLinter review.

@isker isker force-pushed the ecs-empty-placementstrategies branch from 415b28c to dcdd1f7 Compare September 26, 2025 03:18
@aws-cdk-automation aws-cdk-automation added the pr/needs-community-review This PR needs a review from a Trusted Community Member or Core Team Member. label Sep 26, 2025
@github-actions github-actions bot mentioned this pull request Oct 1, 2025
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@vishaalmehrishi vishaalmehrishi self-assigned this Oct 24, 2025
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vishaalmehrishi previously requested changes Oct 24, 2025
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@aws-cdk-automation aws-cdk-automation removed the pr/needs-community-review This PR needs a review from a Trusted Community Member or Core Team Member. label Oct 24, 2025
@mergify mergify bot dismissed vishaalmehrishi’s stale review October 24, 2025 20:41

Pull request has been modified.

@isker isker requested a review from vishaalmehrishi October 24, 2025 20:42
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isker commented Oct 24, 2025

Build failure just looks like an oom...

isker added 2 commits October 24, 2025 17:10
@isker
fix(aws-ecs): allow empty placementStrategies on EC2Service
c8c50ff 
Same fix as aws#30382 but for `placementStrategies`. Apparently this was
not done at that time because CloudFormation [previously did not have
the appropriate
semantics](aws#27572 (comment))
for setting PlacementStrategies to the empty array as it did for
PlacementConstraints, but that is no longer the case. The CloudFormation
docs
[state](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-resource-ecs-service.html#cfn-ecs-service-placementstrategies):
> To remove this property from your service resource, specify an empty PlacementStrategy array.

And indeed that works, with this CDK change applied.
@isker
Code review feedback
cc0397b
@isker isker force-pushed the ecs-empty-placementstrategies branch from 0597424 to cc0397b Compare October 24, 2025 21:10
@mergify mergify bot dismissed vishaalmehrishi’s stale review November 1, 2025 03:26

Pull request has been modified.

@isker isker requested a review from vishaalmehrishi November 1, 2025 04:41
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isker commented Nov 10, 2025

@vishaalmehrishi please take another look.

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mergify bot commented Nov 10, 2025

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

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mergify bot commented Nov 10, 2025

This pull request has been removed from the queue for the following reason: pull request branch update failed.

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For security reasons, Mergify can't update this pull request. Try updating locally.
GitHub response: refusing to allow a GitHub App to create or update workflow .github/workflows/codebuild-pr-build.yml without workflows permission.

You should update or rebase your pull request manually. If you do, this pull request will automatically be requeued once the queue conditions match again.
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@mergify mergify bot dismissed vishaalmehrishi’s stale review November 10, 2025 17:49

Pull request has been modified.

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isker commented Nov 10, 2025

@vishaalmehrishi I merged from main, can you try to land this PR again? I don’t think I’m allowed to do it myself.

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mergify bot commented Nov 10, 2025

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

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mergify bot commented Nov 10, 2025

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

@mergify mergify bot merged commit 0d773b1 into aws:main Nov 10, 2025
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@vishaalmehrishi vishaalmehrishi vishaalmehrishi approved these changes

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