[Bug]: r/aws_redshiftserverless_namespace: unable to remove default IAM role

[marcinbelczewski]

Terraform Core Version

1.9.5

AWS Provider Version

5.66.0

Affected Resource(s)

• aws_redshiftserverless_namespace

Expected Behavior

default IAM role is removed from the namespace. This operation is fully supported by UpdateNamespace API.

Actual Behavior

The following error appears when default_iam_role_arn is removed from resource config:

aws_redshiftserverless_namespace.test: Modifying... [id=test]
╷
│ Error: updating Redshift Serverless Namespace (test): operation error Redshift Serverless: UpdateNamespace, https response error StatusCode: 400, RequestID: cf5a3887-0d24-40e7-ac0d-aad4d5f95e0e, ValidationException: To change the default IAM role, you must specify the entire list of IAM roles.
│
│   with aws_redshiftserverless_namespace.test,
│   on main.tf line 52, in resource "aws_redshiftserverless_namespace" "test":
│   52: resource "aws_redshiftserverless_namespace" "test" {
│

Relevant Error/Panic Output Snippet

No response

Terraform Configuration Files

resource "aws_iam_role" "test" {
    name = "test"
    assume_role_policy = jsonencode({
        Version = "2012-10-17"
        Statement = [
        {
            Effect = "Allow"
            Principal = {
            Service = "redshift.amazonaws.com"
            }
            Action = "sts:AssumeRole"
        }
        ]
    })
}

resource "aws_redshiftserverless_namespace" "test" {
  namespace_name = "test"
  default_iam_role_arn = aws_iam_role.test.arn
  iam_roles = [aws_iam_role.test.arn]
}

Steps to Reproduce

1. Apply the configuration above
2. Remove default_iam_role_arn from the configuration, or set it to "" or null and apply - observe the error

Debug Output

No response

Panic Output

No response

Important Factoids

No response

References

No response

Would you like to implement a fix?

Yes

[github-actions[bot]]

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