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aws-iam: iam:minimizePolicies not working #19751
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IAM Policies were being correctly minimized; however, the minimization was being performed in one pass across all statements. It can be that after one pass, statements have ended up in forms that allow for more merging. Example: ``` [{ A1, R1 }, { A2, R1 }, { A1, R2 }, { A2, R2 }] // -> (pass one, combine actions) [{ [A1, A2], R1}, { [A1, A2], R2 }] // -> (pass two, combine resources) [{ [A1, A2], [R1, R2] }] ``` Change to perform minimization passes until nothing changes anymore. Fixes #19751.
After investigation, turns out that minimization is happening... just not as far as possible. |
IAM Policies were being correctly minimized; however, the minimization was being performed in one pass across all statements. It can be that after one pass, statements have ended up in forms that allow for more merging. Example: ``` [{ A1, R1 }, { A2, R1 }, { A1, R2 }, { A2, R2 }] // -> (pass one, combine actions) [{ [A1, A2], R1}, { [A1, A2], R2 }] // -> (pass two, combine resources) [{ [A1, A2], [R1, R2] }] ``` Change to perform minimization passes until nothing changes anymore. Fixes #19751. ---- ### All Submissions: * [ ] Have you followed the guidelines in our [Contributing guide?](https://github.com/aws/aws-cdk/blob/master/CONTRIBUTING.md) ### Adding new Unconventional Dependencies: * [ ] This PR adds new unconventional dependencies following the process described [here](https://github.com/aws/aws-cdk/blob/master/CONTRIBUTING.md/#adding-new-unconventional-dependencies) ### New Features * [ ] Have you added the new feature to an [integration test](https://github.com/aws/aws-cdk/blob/master/INTEGRATION_TESTS.md)? * [ ] Did you use `cdk-integ` to deploy the infrastructure and generate the snapshot (i.e. `cdk-integ` without `--dry-run`)? *By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*
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See [CHANGELOG](https://github.com/aws/aws-cdk/blob/bump/1.152.0/CHANGELOG.md) For convenience, extracted the relevant CHANGELOG entry: ## [1.152.0](v1.151.0...v1.152.0) (2022-04-06) ### Features * **cfnspec:** cloudformation spec v63.0.0 ([#19679](#19679)) ([dba96a9](dba96a9)) * **cfnspec:** cloudformation spec v65.0.0 ([#19745](#19745)) ([796fc64](796fc64)) * **cli:** add --build option ([#19663](#19663)) ([eb9b8e2](eb9b8e2)), closes [#19667](#19667) * **cli:** preview of `cdk import` ([#17666](#17666)) ([4f12209](4f12209)) * **core:** throw error when stack name exceeds max length ([#19725](#19725)) ([1ffd45e](1ffd45e)) * **eks:** add k8s v1.22 ([#19756](#19756)) ([9a518c5](9a518c5)) * **opensearch:** Add latest Opensearch Version 1.2 ([#19749](#19749)) ([a2ac36e](a2ac36e)) * add new integration test runner ([#19754](#19754)) ([1b4d010](1b4d010)) * **eks:** alb-controller v2.4.1 ([#19653](#19653)) ([1ec08df](1ec08df)) * **lambda:** add support for ephemeral storage ([#19552](#19552)) ([f1d9b6a](f1d9b6a)), closes [#19605](#19605) * **s3:** EventBridge bucket notifications ([#18614](#18614)) ([d8e602b](d8e602b)), closes [#18076](#18076) * **synthetics:** new puppeteer 3.5 runtime ([#19673](#19673)) ([ce2b91b](ce2b91b)), closes [#19634](#19634) ### Bug Fixes * **aws_applicationautoscaling:** Add missing members to PredefinedMetric enum ([#18978](#18978)) ([75a6fa7](75a6fa7)), closes [#18969](#18969) * **cli:** apps with many resources scroll resource output offscreen ([#19742](#19742)) ([053d22c](053d22c)), closes [#19160](#19160) * **cli:** support attributes of DynamoDB Tables for hotswapping ([#19620](#19620)) ([2321ece](2321ece)), closes [#19421](#19421) * **cloudwatch:** automatic metric math label cannot be suppressed ([#17639](#17639)) ([7fa3bf2](7fa3bf2)) * **codedeploy:** add name validation for Application, Deployment Group and Deployment Configuration ([#19473](#19473)) ([9185042](9185042)) * **codedeploy:** the Service Principal is wrong in isolated regions ([#19729](#19729)) ([7e9a43d](7e9a43d)), closes [#19399](#19399) * **core:** `Fn.select` incorrectly short-circuits complex expressions ([#19680](#19680)) ([7f26fad](7f26fad)) * **core:** detect and resolve stringified number tokens ([#19578](#19578)) ([7d9ab2a](7d9ab2a)), closes [#19546](#19546) [#19550](#19550) * **core:** reduce CFN template indent size to save bytes ([#19656](#19656)) ([fd63ca3](fd63ca3)) * **ecs:** 'desiredCount' and 'ephemeralStorageGiB' cannot be tokens ([#19453](#19453)) ([c852239](c852239)), closes [#16648](#16648) * **ecs:** remove unnecessary error when adding volume to external task definition ([#19774](#19774)) ([5446ded](5446ded)), closes [#19259](#19259) * **iam:** policies aren't minimized as far as possible ([#19764](#19764)) ([876ed8a](876ed8a)), closes [#19751](#19751) * **logs:** Faulty Resource Policy Generated ([#19640](#19640)) ([1fdf122](1fdf122)), closes [#17544](#17544)
See [CHANGELOG](https://github.com/aws/aws-cdk/blob/bump/2.20.0/CHANGELOG.md) For convenience, extracted the relevant CHANGELOG entry: ## [2.20.0](v2.19.0...v2.20.0) (2022-04-07) ### Features * **cfnspec:** cloudformation spec v63.0.0 ([#19679](#19679)) ([dba96a9](dba96a9)) * **cfnspec:** cloudformation spec v65.0.0 ([#19745](#19745)) ([796fc64](796fc64)) * **cli:** add --build option ([#19663](#19663)) ([eb9b8e2](eb9b8e2)), closes [#19667](#19667) * **cli:** preview of `cdk import` ([#17666](#17666)) ([4f12209](4f12209)) * **core:** throw error when stack name exceeds max length ([#19725](#19725)) ([1ffd45e](1ffd45e)) * **eks:** add k8s v1.22 ([#19756](#19756)) ([9a518c5](9a518c5)) * **opensearch:** Add latest Opensearch Version 1.2 ([#19749](#19749)) ([a2ac36e](a2ac36e)) * add new integration test runner ([#19754](#19754)) ([1b4d010](1b4d010)) * **eks:** alb-controller v2.4.1 ([#19653](#19653)) ([1ec08df](1ec08df)) * **lambda:** add support for ephemeral storage ([#19552](#19552)) ([f1d9b6a](f1d9b6a)), closes [#19605](#19605) * **s3:** EventBridge bucket notifications ([#18614](#18614)) ([d8e602b](d8e602b)), closes [#18076](#18076) ### Bug Fixes * **aws_applicationautoscaling:** Add missing members to PredefinedMetric enum ([#18978](#18978)) ([75a6fa7](75a6fa7)), closes [#18969](#18969) * **cli:** apps with many resources scroll resource output offscreen ([#19742](#19742)) ([053d22c](053d22c)), closes [#19160](#19160) * **cli:** support attributes of DynamoDB Tables for hotswapping ([#19620](#19620)) ([2321ece](2321ece)), closes [#19421](#19421) * **cloudwatch:** automatic metric math label cannot be suppressed ([#17639](#17639)) ([7fa3bf2](7fa3bf2)) * **codedeploy:** add name validation for Application, Deployment Group and Deployment Configuration ([#19473](#19473)) ([9185042](9185042)) * **codedeploy:** the Service Principal is wrong in isolated regions ([#19729](#19729)) ([7e9a43d](7e9a43d)), closes [#19399](#19399) * **core:** `Fn.select` incorrectly short-circuits complex expressions ([#19680](#19680)) ([7f26fad](7f26fad)) * **core:** detect and resolve stringified number tokens ([#19578](#19578)) ([7d9ab2a](7d9ab2a)), closes [#19546](#19546) [#19550](#19550) * **core:** reduce CFN template indent size to save bytes ([#19656](#19656)) ([fd63ca3](fd63ca3)) * **ecs:** 'desiredCount' and 'ephemeralStorageGiB' cannot be tokens ([#19453](#19453)) ([c852239](c852239)), closes [#16648](#16648) * **ecs:** remove unnecessary error when adding volume to external task definition ([#19774](#19774)) ([5446ded](5446ded)), closes [#19259](#19259) * **iam:** policies aren't minimized as far as possible ([#19764](#19764)) ([876ed8a](876ed8a)), closes [#19751](#19751) * **logs:** Faulty Resource Policy Generated ([#19640](#19640)) ([1fdf122](1fdf122)), closes [#17544](#17544)
just tested it with the new version. Works like a charm. Thanks a lot for the quick fix! |
IAM Policies were being correctly minimized; however, the minimization was being performed in one pass across all statements. It can be that after one pass, statements have ended up in forms that allow for more merging. Example: ``` [{ A1, R1 }, { A2, R1 }, { A1, R2 }, { A2, R2 }] // -> (pass one, combine actions) [{ [A1, A2], R1}, { [A1, A2], R2 }] // -> (pass two, combine resources) [{ [A1, A2], [R1, R2] }] ``` Change to perform minimization passes until nothing changes anymore. Fixes aws#19751. ---- ### All Submissions: * [ ] Have you followed the guidelines in our [Contributing guide?](https://github.com/aws/aws-cdk/blob/master/CONTRIBUTING.md) ### Adding new Unconventional Dependencies: * [ ] This PR adds new unconventional dependencies following the process described [here](https://github.com/aws/aws-cdk/blob/master/CONTRIBUTING.md/#adding-new-unconventional-dependencies) ### New Features * [ ] Have you added the new feature to an [integration test](https://github.com/aws/aws-cdk/blob/master/INTEGRATION_TESTS.md)? * [ ] Did you use `cdk-integ` to deploy the infrastructure and generate the snapshot (i.e. `cdk-integ` without `--dry-run`)? *By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*
Describe the bug
I wanted to try the new flag iam:minimizePolicies but it does not seem to be working. Policies are not minimised.
In particular I am using ecrrepo.grantPullPush in a loop over a number of repositories for one iam user. The resulting policy for the user still has one block per repository which could be minimised to a single block with multiple resources.
Expected Behavior
Policy should be minimised.
Current Behavior
Policy has one block per resource
Reproduction Steps
Example code:
Possible Solution
No response
Additional Information/Context
I am using projen
The stack in question is part of a cdk pipeline
CDK CLI Version
2.19.0
Framework Version
No response
Node.js Version
17.8.0
OS
macOS 12.3.1
Language
Typescript
Language Version
No response
Other information
No response
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