Add support for controlling Users in IAM Groups

[naclonts]

Issue #, if available: aws-controllers-k8s/community#2207

Description of changes: Add support for a Users list under Group. The group's IAM users will be added or removed based on the list defined in the CR.

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

Testing

Added automated e2e tests.

Manual test

YAML file group_w_users.yaml :

apiVersion: iam.services.k8s.aws/v1alpha1
kind: Group
metadata:
  name: cool-peeps
spec:
  name: cool-peeps
  users:
    - nclonts

Apply:

% k apply -f group_w_users.yaml
group.iam.services.k8s.aws/cool-peeps configured

Verified AWS account has group cool-peeps that includes user nclonts.

[ack-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: naclonts
Once this PR has been reviewed and has the lgtm label, please assign jlbutler for approval by writing /assign @jlbutler in a comment. For more information see the Kubernetes Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ack-prow]

Hi @naclonts. Thanks for your PR.

I'm waiting for a aws-controllers-k8s member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[knottnt]

Thinking about usability of this feature it might be better to add a list of groups to the User resource instead. A group can have hundreds to thousands of users in normal use, whereas a user would normally have a much more limited number number of groups.

[knottnt]

Could you add a description for the custom field? The CRD descriptions are used to generate our API reference docs. You should be able to do that in the generator.yaml with the DocumenationConfig.

[knottnt]

Could you pull the latest tags from upstream and rebuild.

[knottnt]

/hold

[s10gopal]

Thanks for working on this @naclonts ! This would be very helpful for us as we're trying to use IAM ACK for end-to-end user management. Happy to help with testing this in our environment, reviewing changes, or addressing follow-up comments if that helps move this forward.