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fix(scheduler-alpha): too many KMS permissions granted #31923

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merged 4 commits into from
Oct 28, 2024

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@samson-keung samson-keung commented Oct 28, 2024

Issue # (if applicable)

Tracking #31785.

Reason for this change

When customer use a KMS Customer Managed Key (CMK) with the Schedule construct, the following permissions are added to the scheduler execution role:

'kms:Decrypt', 'kms:Encrypt', 'kms:ReEncrypt*', 'kms:GenerateDataKey*'

However, upon testing, having only the kms:Decrypt permission is enough for the Schedule to invoke the target (Lambda Function as a target was used in the test.).

Description of changes

This PR removes the unneeded KMS permissions and updated integ test to verify that the schedule is still able to invoke the target.

Description of how you validated changes

Unit test and integ test.

Checklist


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


BREAKING CHANGE: Extra KMS permissions are removed from Schedule execution role when KMS key is passed to Schedule.

@aws-cdk-automation aws-cdk-automation requested a review from a team October 28, 2024 19:35
@github-actions github-actions bot added the p2 label Oct 28, 2024
@mergify mergify bot added the contribution/core This is a PR that came from AWS. label Oct 28, 2024
import * as scheduler from '../lib';

class SomeLambdaTarget implements scheduler.IScheduleTarget {
public constructor(private readonly fn: lambda.IFunction, private readonly role: iam.IRole) {
class SomeSqsTarget implements scheduler.IScheduleTarget {
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Opted to use SQS queue for this test so that we can use ReceiveMessage in the assertions to test the runtime behaviour, without needing to write a Lambda Function.

@aws-cdk-automation aws-cdk-automation added the pr/needs-maintainer-review This PR needs a review from a Core Team Member label Oct 28, 2024
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LGTM, follows Scheduler docs under Execution role permissions for customer managed keys section

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mergify bot commented Oct 28, 2024

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).

@aws-cdk-automation aws-cdk-automation removed the pr/needs-maintainer-review This PR needs a review from a Core Team Member label Oct 28, 2024
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AWS CodeBuild CI Report

  • CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
  • Commit ID: 09f7ad1
  • Result: SUCCEEDED
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@mergify mergify bot merged commit 06678a3 into aws:main Oct 28, 2024
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mergify bot commented Oct 28, 2024

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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3 participants