aws_cloudfront_origin_access_identity

Creates an Amazon CloudFront origin access identity.

For information about CloudFront distributions, see the Amazon CloudFront Developer Guide. For more information on generating origin access identities, see Using an Origin Access Identity to Restrict Access to Your Amazon S3 Content.

Example Usage

The following example below creates a CloudFront origin access identity.

resource "aws_cloudfront_origin_access_identity" "origin_access_identity" {
  comment = "Some comment"
}

Argument Reference

  • comment (Optional) - An optional comment for the origin access identity.

Attribute Reference

The following attributes are exported:

  • id - The identifier for the distribution. For example: EDFDVBD632BHDS5.
  • caller_reference - Internal value used by CloudFront to allow future updates to the origin access identity.
  • cloudfront_access_identity_path - A shortcut to the full path for the origin access identity to use in CloudFront, see below.
  • etag - The current version of the origin access identity's information. For example: E2QWRUHAPOMQZL.
  • iam_arn - A pre-generated ARN for use in S3 bucket policies (see below). Example: arn:aws:iam::cloudfront:user/CloudFront Origin Access Identity E2QWRUHAPOMQZL.
  • s3_canonical_user_id - The Amazon S3 canonical user ID for the origin access identity, which you use when giving the origin access identity read permission to an object in Amazon S3.

Using With CloudFront

Normally, when referencing an origin access identity in CloudFront, you need to prefix the ID with the origin-access-identity/cloudfront/ special path. The cloudfront_access_identity_path allows this to be circumvented. The below snippet demonstrates use with the s3_origin_config structure for the aws_cloudfront_web_distribution resource:

s3_origin_config {
  origin_access_identity = "${aws_cloudfront_origin_access_identity.origin_access_identity.cloudfront_access_identity_path}"
}

Updating your bucket policy

Note that the AWS API may translate the s3_canonical_user_id CanonicalUser principal into an AWS IAM ARN principal when supplied in an aws_s3_bucket bucket policy, causing spurious diffs in Terraform. If you see this behaviour, use the iam_arn instead:

data "aws_iam_policy_document" "s3_policy" {
  statement {
    actions   = ["s3:GetObject"]
    resources = ["${module.names.s3_endpoint_arn_base}/*"]

    principals {
      type        = "AWS"
      identifiers = ["${aws_cloudfront_origin_access_identity.origin_access_identity.iam_arn}"]
    }
  }

  statement {
    actions   = ["s3:ListBucket"]
    resources = ["${module.names.s3_endpoint_arn_base}"]

    principals {
      type        = "AWS"
      identifiers = ["${aws_cloudfront_origin_access_identity.origin_access_identity.iam_arn}"]
    }
  }
}

aws_s3_bucket "bucket" {
  ...
  policy = "${data.aws_iam_policy_document.s3_policy.json}"
}

Import

Cloudfront Origin Access Identities can be imported using the id, e.g.

$ terraform import aws_cloudfront_origin_access_identity.origin_access E74FTE3AEXAMPLE