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terraform-aws-organization-access-role

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Terraform module to create an IAM Role to grant permissions to delegated IAM users in the master account to access an invited member account

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Terraform module to create an IAM Role to grant permissions to delegated IAM users in the master account to access an invited member account

https://docs.aws.amazon.com/organizations/latest/userguide/orgs_manage_accounts_access.html

## Screenshots

<img src="images/OrganizationAccountAccessRole.png" alt="OrganizationAccountAccessRole" />*Organization Account Access Role as Viewed from the AWS Web Console*

> [!TIP]
> #### 👽 Use Atmos with Terraform
> Cloud Posse uses [`atmos`](https://atmos.tools) to easily orchestrate multiple environments using Terraform. 
> Works with [Github Actions](https://atmos.tools/integrations/github-actions/), [Atlantis](https://atmos.tools/integrations/atlantis), or [Spacelift](https://atmos.tools/integrations/spacelift).
>
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> Example of running <a href="https://atmos.tools"><code>atmos</code></a> to manage infrastructure from our <a href="https://atmos.tools/quick-start/">Quick Start</a> tutorial.
> </detalis>

## Introduction

By default, when you create a member account as part of your Organization, AWS automatically creates `OrganizationAccountAccessRole` in the member account.

The role grants admin permissions to the member account to delegated IAM users in the master account.

However, member accounts that you invite to join your Organization do not automatically get the role created.

This module creates `OrganizationAccountAccessRole` role in an invited member account.

AWS recommends using the same name, `OrganizationAccountAccessRole`, for the created role for consistency and ease of remembering.

## Usage

```hcl
module "organization_access_role" {
  source            = "git::https://github.com/cloudposse/terraform-aws-organization-access-role.git?ref=master"
  master_account_id = "XXXXXXXXXXXX"
  role_name         = "OrganizationAccountAccessRole"
  policy_arn        = "arn:aws:iam::aws:policy/AdministratorAccess"
```

After the role has been created in the invited member account, login to the master account and create the following policy:

(change `YYYYYYYYYYYY` to the ID of the invited member account)

```json
{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "sts:AssumeRole"
            ],
            "Resource": [
                "arn:aws:iam::YYYYYYYYYYYY:role/OrganizationAccountAccessRole"
            ]
        }
    ]
}
```

Then attach the policy to a master account Group that you want to delegate administration of the invited member account.

After that, users who are members of the Group in the master account will be able to assume the role and administer the invited member account by going here:

(change `YYYYYYYYYYYY` to the ID of the invited member account)

```
https://signin.aws.amazon.com/switchrole
                ?account=YYYYYYYYYYYY
                &roleName=OrganizationAccountAccessRole
                &displayName=Dev
```

__NOTE__: You can use [terraform-aws-organization-access-group](https://github.com/cloudposse/terraform-aws-organization-access-group) module
to create an IAM Group and Policy to grant permissions to delegated IAM users in the Organization's master account to access a member account.

> [!IMPORTANT]
> In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation
> and the latest released versions. However, for your own projects, we strongly advise pinning each module to the exact version
> you're using. This practice ensures the stability of your infrastructure. Additionally, we recommend implementing a systematic
> approach for updating versions to avoid unexpected changes.

## Requirements

No requirements.

## Providers

| Name | Version |
|------|---------|
| <a name="provider_aws"></a> [aws](#provider\_aws) | n/a |

## Modules

No modules.

## Resources

| Name | Type |
|------|------|
| [aws_iam_role.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role) | resource |
| [aws_iam_role_policy_attachment.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role_policy_attachment) | resource |
| [aws_iam_policy_document.assume_role](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document) | data source |

## Inputs

| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| <a name="input_master_account_id"></a> [master\_account\_id](#input\_master\_account\_id) | The ID of the master account to grant permissions to access the current account | `string` | n/a | yes |
| <a name="input_policy_arn"></a> [policy\_arn](#input\_policy\_arn) | Policy ARN to attach to the role. By default it attaches `AdministratorAccess` managed policy to grant full access to AWS services and resources in the current account | `string` | `"arn:aws:iam::aws:policy/AdministratorAccess"` | no |
| <a name="input_role_name"></a> [role\_name](#input\_role\_name) | The name of the role to grant permissions to delegated IAM users in the master account to the current account | `string` | `"OrganizationAccountAccessRole"` | no |

## Outputs

| Name | Description |
|------|-------------|
| <a name="output_role_arn"></a> [role\_arn](#output\_role\_arn) | The Amazon Resource Name (ARN) specifying the role |
| <a name="output_role_id"></a> [role\_id](#output\_role\_id) | The stable and unique string identifying the role |
| <a name="output_role_name"></a> [role\_name](#output\_role\_name) | The name of the crated role |

## Related Projects

Check out these related projects.

- [terraform-aws-organization-access-group](https://github.com/cloudposse/terraform-aws-organization-access-group) - Terraform module to create an IAM Group and Policy to grant permissions to delegated IAM users in the Organization's master account to access a member account

> [!TIP]
> #### Use Terraform Reference Architectures for AWS
>
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>
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> <details><summary>📚 Learn More</summary>
>
> 
>
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>
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>
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> </details>

## ✨ Contributing

This project is under active development, and we encourage contributions from our community.

Many thanks to our outstanding contributors:

For 🐛 bug reports & feature requests, please use the [issue tracker](https://github.com/cloudposse/terraform-aws-organization-access-role/issues).

In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
 1. Review our [Code of Conduct](https://github.com/cloudposse/terraform-aws-organization-access-role/?tab=coc-ov-file#code-of-conduct) and [Contributor Guidelines](https://github.com/cloudposse/.github/blob/main/CONTRIBUTING.md).
 2. **Fork** the repo on GitHub
 3. **Clone** the project to your own machine
 4. **Commit** changes to your own branch
 5. **Push** your work back up to your fork
 6. Submit a **Pull Request** so that we can review your changes

**NOTE:** Be sure to merge the latest changes from "upstream" before making a pull request!

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Join our [Open Source Community](https://cpco.io/slack?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-organization-access-role&utm_content=slack) on Slack. It's **FREE** for everyone! Our "SweetOps" community is where you get to talk with others who share a similar vision for how to rollout and manage infrastructure. This is the best place to talk shop, ask questions, solicit feedback, and work together as a community to build totally *sweet* infrastructure.

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## License

<details>
<summary>Preamble to the Apache License, Version 2.0</summary>

Complete license is available in the [`LICENSE`](LICENSE) file.

```text
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
```
</details>

## Trademarks

All other trademarks referenced herein are the property of their respective owners.

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