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aws-iam: iam:minimizePolicies not working #19751

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shotty1 opened this issue Apr 4, 2022 · 3 comments · Fixed by #19764
Closed

aws-iam: iam:minimizePolicies not working #19751

shotty1 opened this issue Apr 4, 2022 · 3 comments · Fixed by #19764
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@aws-cdk/aws-iam Related to AWS Identity and Access Management bug This issue is a bug. needs-triage This issue or PR still needs to be triaged.

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@shotty1
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shotty1 commented Apr 4, 2022

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:

import * as ecr from 'aws-cdk-lib/aws-ecr'
import * as iam from 'aws-cdk-lib/aws-iam'

const myUser = new iam.User(this, 'myUser')

const repoList = [
  'repoName1',
  'repoName2',
  'repoName3',
]
// Repository creation
repoList.forEach( repoName =>{
  const repo = new ecr.Repository(this, `${repoName}Repo`, {
    imageScanOnPush: true,
    repositoryName: repoName,
  })
  // Grant pull access for all the workload stages
  repo.grantPullPush(myUser)
})

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

@shotty1 shotty1 added bug This issue is a bug. needs-triage This issue or PR still needs to be triaged. labels Apr 4, 2022
@github-actions github-actions bot added the @aws-cdk/aws-iam Related to AWS Identity and Access Management label Apr 4, 2022
rix0rrr added a commit that referenced this issue Apr 5, 2022
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.
@rix0rrr
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rix0rrr commented Apr 5, 2022

After investigation, turns out that minimization is happening... just not as far as possible.

@mergify mergify bot closed this as completed in #19764 Apr 5, 2022
mergify bot pushed a commit that referenced this issue Apr 5, 2022
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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github-actions bot commented Apr 5, 2022

⚠️COMMENT VISIBILITY WARNING⚠️

Comments on closed issues are hard for our team to see.
If you need more assistance, please either tag a team member or open a new issue that references this one.
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This was referenced Apr 7, 2022
mergify bot added a commit that referenced this issue Apr 7, 2022
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)
mergify bot added a commit that referenced this issue Apr 7, 2022
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)
@shotty1
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shotty1 commented Apr 8, 2022

just tested it with the new version. Works like a charm. Thanks a lot for the quick fix!

StevePotter pushed a commit to StevePotter/aws-cdk that referenced this issue Apr 27, 2022
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*
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