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AWS Control Tower Account Factory for Terraform

AWS Control Tower Account Factory for Terraform (AFT) follows a GitOps model to automate the processes of account provisioning and account updating in AWS Control Tower. You'll create an account request Terraform file, which provides the necessary input that triggers the AFT workflow for account provisioning.

For more information on AFT, see Overview of AWS Control Tower Account Factory for Terraform

Getting started

This guide is intended for administrators of AWS Control Tower environments who wish to set up Account Factory for Terraform (AFT) in their environment. It describes how to set up an Account Factory for Terraform (AFT) environment with a new, dedicated AFT management account. This guide follows the deployment steps outlined in Deploy AWS Control Tower Account Factory for Terraform (AFT)

Configure and launch your AWS Control Tower Account Factory for Terraform

Five steps are required to configure and launch your AFT environment.

Step 1: Launch your AWS Control Tower landing zone

Before launching AFT, you must have a working AWS Control Tower landing zone in your AWS account. You will configure and launch AFT from the AWS Control Tower management account.

Step 2: Create a new organizational unit for AFT (recommended)

We recommend that you create a separate OU in your AWS Organization, where you will deploy the AFT management account. Create an OU through your AWS Control Tower management account. For instructions on how to create an OU, refer to Create an organization in the AWS Organizations User Guide.

Step 3: Provision the AFT management account

AFT requires a separate AWS account to manage and orchestrate its own requests. From the AWS Control Tower management account that's associated with your AWS Control Tower landing zone, you'll provision this account for AFT.

To provision the AFT management account, see Provisioning Account Factory Accounts With AWS Service Catalog. When specifying an OU, be sure to select the OU you created in Step 2. When specifying a name, use "AFT-Management".

Note: It can take up to 30 minutes for the account to be fully provisioned. Validate that you have access to the AFT management account.

Step 4: Ensure that the Terraform environment is available for deployment

This step assumes that you are experienced with Terraform, and that you have procedures in place for executing Terraform. AFT supports Terraform Version 0.15.x or later.

Step 5: Call the Account Factory for Terraform module to deploy AFT

The Account Factory for Terraform module must be called while you are authenticated with AdministratorAccess credentials in your AWS Control Tower management account.

AWS Control Tower, through the AWS Control Tower management account, vends a Terraform module that establishes all infrastructure necessary to orchestrate your AWS Control Tower account factory requests. You can view that module in the AFT repository.

Refer to the module’s README file for information about the input required to run the module and deploy AFT.

If you have established pipelines for managing Terraform in your environment, you can integrate this module into your existing workflow. Otherwise, run the module from any environment that is authenticated with the required credentials.

Note: The AFT Terraform module does not manage a backend Terraform state. Be sure to preserve the Terraform state file that’s generated, after applying the module, or set up a Terraform backend using Amazon S3 and DynamoDB.

Certain input variables may contain sensitive values, such as a private ssh key or Terraform token. These values may be viewable as plain text in Terraform state file, depending on your deployment method. It is your responsibility to protect the Terraform state file, which may contain sensitive data. See the Terraform documentation

for more information.

Note: Deploying AFT through the Terraform module requires several minutes. Initial deployment may require up to 30 minutes. As a best practice, use AWS Security Token Service (STS) credentials and ensure that the credentials have a timeout sufficient for a full deployment, because a timeout causes the deployment to fail. The minimum timeout for AWS STS credentials is 60 minutes or more. Alternatively, you can leverage any IAM user that has AdministratorAccess permissions in the AWS Control Tower management account.

Next Steps:

Now that you have configured and deployed AWS Control Tower Account Factory for Terraform, follow the steps outlined in Post-deployment steps and Provision accounts with AWS Control Tower Account Factory for Terraform to begin using your environment.

Collection of Operational Metrics

As of version 1.6.0, AFT collects anonymous operational metrics to help AWS improve the quality and features of the solution. For more information, including how to disable this capability, please see the documentation here.

Requirements

Name Version
terraform >= 0.15.1, < 2.0.0
aws >= 4.27.0, < 5.0.0

Providers

Name Version
aws >= 4.27.0, < 5.0.0
local n/a

Modules

Name Source Version
aft_account_provisioning_framework ./modules/aft-account-provisioning-framework n/a
aft_account_request_framework ./modules/aft-account-request-framework n/a
aft_backend ./modules/aft-backend n/a
aft_code_repositories ./modules/aft-code-repositories n/a
aft_customizations ./modules/aft-customizations n/a
aft_feature_options ./modules/aft-feature-options n/a
aft_iam_roles ./modules/aft-iam-roles n/a
aft_lambda_layer ./modules/aft-lambda-layer n/a
aft_ssm_parameters ./modules/aft-ssm-parameters n/a
packaging ./modules/aft-archives n/a

Resources

Name Type
aws_partition.current data source
local_file.version data source

Inputs

Name Description Type Default Required
account_customizations_repo_branch Branch to source account customizations repo from string "main" no
account_customizations_repo_name Repository name for the account customizations files. For non-CodeCommit repos, name should be in the format of Org/Repo string "aft-account-customizations" no
account_provisioning_customizations_repo_branch Branch to source account provisioning customization files string "main" no
account_provisioning_customizations_repo_name Repository name for the account provisioning customizations files. For non-CodeCommit repos, name should be in the format of Org/Repo string "aft-account-provisioning-customizations" no
account_request_repo_branch Branch to source account request repo from string "main" no
account_request_repo_name Repository name for the account request files. For non-CodeCommit repos, name should be in the format of Org/Repo string "aft-account-request" no
aft_feature_cloudtrail_data_events Feature flag toggling CloudTrail data events on/off bool false no
aft_feature_delete_default_vpcs_enabled Feature flag toggling deletion of default VPCs on/off bool false no
aft_feature_enterprise_support Feature flag toggling Enterprise Support enrollment on/off bool false no
aft_framework_repo_git_ref Git branch from which the AFT framework should be sourced from string null no
aft_framework_repo_url Git repo URL where the AFT framework should be sourced from string "https://github.com/aws-ia/terraform-aws-control_tower_account_factory.git" no
aft_management_account_id AFT Management Account ID string n/a yes
aft_metrics_reporting Flag toggling reporting of operational metrics bool true no
aft_vpc_cidr CIDR Block to allocate to the AFT VPC string "192.168.0.0/22" no
aft_vpc_endpoints Flag turning VPC endpoints on/off for AFT VPC bool true no
aft_vpc_private_subnet_01_cidr CIDR Block to allocate to the Private Subnet 01 string "192.168.0.0/24" no
aft_vpc_private_subnet_02_cidr CIDR Block to allocate to the Private Subnet 02 string "192.168.1.0/24" no
aft_vpc_public_subnet_01_cidr CIDR Block to allocate to the Public Subnet 01 string "192.168.2.0/25" no
aft_vpc_public_subnet_02_cidr CIDR Block to allocate to the Public Subnet 02 string "192.168.2.128/25" no
audit_account_id Audit Account Id string n/a yes
cloudwatch_log_group_retention Amount of days to keep CloudWatch Log Groups for Lambda functions. 0 = Never Expire string "0" no
concurrent_account_factory_actions Maximum number of accounts that can be provisioned in parallel. number 5 no
ct_home_region The region from which this module will be executed. This MUST be the same region as Control Tower is deployed. string n/a yes
ct_management_account_id Control Tower Management Account Id string n/a yes
github_enterprise_url GitHub enterprise URL, if GitHub Enterprise is being used string "null" no
global_codebuild_timeout Codebuild build timeout number 60 no
global_customizations_repo_branch Branch to source global customizations repo from string "main" no
global_customizations_repo_name Repository name for the global customization files. For non-CodeCommit repos, name should be in the format of Org/Repo string "aft-global-customizations" no
log_archive_account_id Log Archive Account Id string n/a yes
maximum_concurrent_customizations Maximum number of customizations/pipelines to run at once number 5 no
terraform_api_endpoint API Endpoint for Terraform. Must be in the format of https://xxx.xxx. string "https://app.terraform.io/api/v2/" no
terraform_distribution Terraform distribution being used for AFT - valid values are oss, tfc, or tfe string "oss" no
terraform_org_name Organization name for Terraform Cloud or Enterprise string "null" no
terraform_token Terraform token for Cloud or Enterprise string "null" no
terraform_version Terraform version being used for AFT string "0.15.5" no
tf_backend_secondary_region AFT creates a backend for state tracking for its own state as well as OSS cases. The backend's primary region is the same as the AFT region, but this defines the secondary region to replicate to. string "" no
vcs_provider Customer VCS Provider - valid inputs are codecommit, bitbucket, github, or githubenterprise string "codecommit" no

Outputs

Name Description
account_customizations_repo_branch n/a
account_customizations_repo_name n/a
account_provisioning_customizations_repo_branch n/a
account_provisioning_customizations_repo_name n/a
account_request_repo_branch n/a
account_request_repo_name n/a
aft_feature_cloudtrail_data_events n/a
aft_feature_delete_default_vpcs_enabled n/a
aft_feature_enterprise_support n/a
aft_management_account_id n/a
aft_vpc_cidr n/a
aft_vpc_private_subnet_01_cidr n/a
aft_vpc_private_subnet_02_cidr n/a
aft_vpc_public_subnet_01_cidr n/a
aft_vpc_public_subnet_02_cidr n/a
audit_account_id n/a
cloudwatch_log_group_retention n/a
ct_home_region n/a
ct_management_account_id n/a
github_enterprise_url n/a
global_customizations_repo_branch n/a
global_customizations_repo_name n/a
log_archive_account_id n/a
maximum_concurrent_customizations n/a
terraform_api_endpoint n/a
terraform_distribution n/a
terraform_org_name n/a
terraform_version n/a
tf_backend_secondary_region n/a
vcs_provider n/a

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