Setting Up Approval Rule for AWS CodeCommit Repositories

Correct Answer : A.

Option A is CORRECT because you can define who can approve the pull requests in the approval rule template and then associate the template with CodeCommit repositories.

Option B is incorrect because there is no pull request template in CodeCommit.

In this case, you would need to create an approval rule template.

Option C is incorrect because this option only allows the approval action from the IAM perspective.

However, this question asks for an approval rule in the CodeCommit pull requests.

Option D is incorrect because an approval template is required to enforce the rule in the pull requests.

The "codecommit:CreatePullRequest" action is used to create a pull request and is not related to approving it.

Reference:

https://docs.aws.amazon.com/codecommit/latest/userguide/approval-rule-templates.html

The correct answer to this question is A. Create an approval rule template in CodeCommit, add the IAM users of senior developers in “Approval pool members” and associate the template with all CodeCommit repositories.

Explanation: AWS CodeCommit is a fully managed source control service that hosts secure Git-based repositories. It allows developers to collaborate on code, and provides version control for all source code and assets. AWS CodeCommit supports pull requests, which are a way to propose changes to the code. When a pull request is submitted, it goes through a review process where other developers can review the proposed changes and provide comments. Once the pull request is approved, the changes are merged into the codebase.

In this scenario, we need to create an approval rule that requires approvals for pull requests to come from senior developers. To achieve this, we need to create an approval rule template in CodeCommit and associate it with all existing repositories.

To create an approval rule template, we need to follow these steps:

1. Open the AWS CodeCommit console.
2. Select the repository for which you want to create the approval rule template.
3. Click on the "Settings" tab.
4. Under "Approval rules", click on "Create template".
5. Give the template a name and a description.
6. Under "Approval pool members", add the IAM users of senior developers who should be allowed to approve pull requests.
7. Under "Approval rule content", specify the conditions that need to be met before a pull request can be approved. For example, we could require that at least two senior developers approve the pull request.
8. Click on "Create template".

Once the approval rule template has been created, we need to associate it with all existing repositories. To do this, we need to follow these steps:

1. Open the AWS CodeCommit console.
2. Click on the "Settings" tab.
3. Under "Approval rules", click on "Associate template".
4. Select the approval rule template that we created earlier.
5. Click on "Associate".

This will associate the approval rule template with all existing repositories. Any new pull requests submitted to these repositories will now be subject to the approval rule, and will only be approved if they meet the conditions specified in the approval rule template.

Option B is not correct because creating a pull request template only affects new pull requests, not existing ones.

Option C is not correct because adding an IAM policy to allow the "codecommit:UpdatePullRequestApprovalState" action only affects the ability to update the approval status of a pull request, and does not enforce who can approve it in the first place.

Option D is not correct because adding the AWSCodeCommitPowerUser managed policy only grants permissions to perform certain actions, and does not enforce who can approve pull requests. Additionally, restricting the "codecommit:CreatePullRequest" action only prevents users from creating new pull requests, but does not affect existing ones.