[Bug]: Unable to use single DNS server when using Self-Managed Active Directory for RDS MSSQL

[kostasns]

Terraform Core Version

1.5.7

AWS Provider Version

5.41.0

Affected Resource(s)

• aws_db_instance

Expected Behavior

Apply complete! Resources: 1 added, 0 changed, 0 destroyed.

Actual Behavior

Error: Not enough list items
│
│   with module.rds.aws_db_instance.this,
│   on ..\modules\rds\main.tf line 111, in resource "aws_db_instance" "this":
│  436:   domain_dns_ips         = ["10.10.10.10","10.10.10.10"]
│
│ Attribute domain_dns_ips requires 2 item minimum, but config has only 1 declared.

Relevant Error/Panic Output Snippet

No response

Terraform Configuration Files

  domain_fqdn                  = var.domain_fqdn
  domain_ou                     = var.domain_ou
  domain_auth_secret_arn = var.domain_auth_secret_arn
  domain_dns_ips              = ["10.10.10.10","10.10.10.10"]

Steps to Reproduce

• Create RDS MSSQL with Self-Managed Active directory providing single DNS IP for both primary and secondary field.

Debug Output

No response

Panic Output

No response

Important Factoids

No response

References

https://docs.aws.amazon.com/AmazonRDS/latest/APIReference/API_ModifyDBInstance.html#API_ModifyDBInstance_RequestParameters

DomainDnsIps.member.N
The IPv4 DNS IP addresses of your primary and secondary Active Directory domain controllers.

Constraints:
Two IP addresses must be provided. If there isn't a secondary domain controller, use the IP address of the primary domain controller for both entries in the list.

Would you like to implement a fix?

No

[github-actions]

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[kostasns]

Hello @justinretzolk,
Is there a possibility for someone to look into the PR I've put together ?

[github-actions]

Warning

This issue has been closed, meaning that any additional comments are hard for our team to see. Please assume that the maintainers will not see them.

Ongoing conversations amongst community members are welcome, however, the issue will be locked after 30 days. Moving conversations to another venue, such as the AWS Provider forum, is recommended. If you have additional concerns, please open a new issue, referencing this one where needed.

[github-actions]

This functionality has been released in v5.61.0 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]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.