Add support for Active Directory in AWS Transfer

[dusty73]

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Description

AWS released a new feature that allows to use AD Authentication with AWS Transfer service through AWS AD managed services.

New or Affected Resource(s)

• aws_transfer_access (new resource), allows to configure mapping and permissions of AD groups into UNIX users for EFS (ref: https://docs.aws.amazon.com/transfer/latest/userguide/API_CreateAccess.html)
• aws_transfer_server.identity_provider_type attribute, must accept new value AWS_DIRECTORY_SERVICE
• aws_transfer_server.directory_id (new attribute), contains AWS AD managed service id, ref: https://docs.aws.amazon.com/transfer/latest/userguide/API_CreateServer.html#API_CreateServer_RequestSyntax

Potential Terraform Configuration

resource "aws_transfer_server" "example" {
  endpoint_type = "PUBLIC"
  protocols   = ["SFTP"]
  domain = "EFS"

  identity_provider_type = "AWS_DIRECTORY_SERVICE"
  directory_id                   = "id-of-an-existing-ad"
}

resource "aws_transfer_access" "access1" {
  server_id = aws_transfer_server.example.id
  role = "a_vaild_role_arn_that_allow_access_to_s3_or_efs_resource"
  external_id = "S-1-1-12-1234567890-1234567890-1234567890-1234" # SID of an AD Group
  home_directory = "/fs-c4e164f0/$${transfer:Username}" # fs-c4e164f0 is the id of an EFS volume, note the double $, it's a string that must be passed as is to AWS, it isn't a terraform interpolation
  home_directory_type = "PATH"
  home_directory_mappings = [
    {
      entry = "/readme"
      target = "/general/readme"
    }
  ]
  policy = "a-valid-policy" # valid only for S3 AWS Transfer server type
  uid: 10001
  gid: 10001
  secondary_gids: [ 20001, 30001]
}

References

• AWS Announcement: https://aws.amazon.com/about-aws/whats-new/2021/06/aws-directory-service-now-supports-active-directory-authentication-with-aws-transfer-family/
• API: https://docs.aws.amazon.com/transfer/latest/userguide/API_CreateAccess.html
• How to configure it from the console: https://docs.aws.amazon.com/transfer/latest/userguide/directory-services-users.html

[github-actions]

This functionality has been released in v3.59.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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