[Bug]: DependencyViolation with ENIs associated with security group of lambda

[vamshidhar-rapolu]

Terraform Core Version

1.8.1

AWS Provider Version

5.46.0

Affected Resource(s)

aws_security_group

Expected Behavior

Terraform destroy of the lambda is expected to be successful with the aws_security_group being destroyed successfully. This works using the aws provider version 5.45.0

Actual Behavior

Terraform destroy fails to delete the security group of the lambda due to dependency on the network interface eni.
╷ │ Error: deleting Security Group (sg-xxxxxxxxxxxxxxxxx): DependencyViolation: resource sg-xxxxxxxxxxxxxxxxx has a dependent object │ status code: 400, request id: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx │ │ ╵

Deleting the network interface(s) associated with the security group manually and retrying the terraform destroy works as expected.

Relevant Error/Panic Output Snippet

╷
│ Error: deleting Security Group (sg-xxxxxxxxxxxxxxxxx): DependencyViolation: resource sg-xxxxxxxxxxxxxxxxx has a dependent object
│ 	status code: 400, request id: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
│ 
│ 
╵

Terraform Configuration Files

resource "aws_security_group" "this" {
  name   = "Redacted"
  vpc_id = "Redacted"

  egress {
    from_port   = 0
    to_port     = 0
    protocol    = "-1"
    cidr_blocks = ["Redacted"]
  }
}

resource "aws_lambda_function" "lambda1" {
  description      = "Redacted"
  filename         = data.archive_file.Redacted.output_path
  function_name    = "Redacted"
  handler          = "Redacted.lambda_handler"
  role             = aws_iam_role.Redacted.arn
  runtime          = "python3.9"
  source_code_hash = data.archive_file.Redacted.output_base64sha256
  timeout          = 30

  vpc_config {
    subnet_ids         = var.subnet_ids
    security_group_ids = [aws_security_group.this.id]
  }
}

resource "aws_lambda_function" "lambda2" {
  description      = "Redacted"
  filename         = data.archive_file.Redacted.output_path
  function_name    = "Redacted"
  handler          = "Redacted.lambda_handler"
  role             = aws_iam_role.Redacted.arn
  runtime          = "python3.9"
  source_code_hash = data.archive_file.Redacted.output_base64sha256
  timeout          = 30

  vpc_config {
    subnet_ids         = var.subnet_ids
    security_group_ids = [aws_security_group.this.id]
  }
}

Steps to Reproduce

Running terraform destroy isn't successful with aws provider 5.46.0 due to the DependencyViolation error stated above.

Debug Output

No response

Panic Output

No response

Important Factoids

There is no issue with the destroy run using the aws provider version 5.45.0

References

Relates #32756.

Would you like to implement a fix?

None

[github-actions]

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[aniketcds]

i am also facing the same issue, security group stucks in still destroying...

[ewbankkit]

My guess is that it's this change in internal/service/ec2/vpc_network_interface.go, deleteLingeringENIs:

	for _, eni := range enis {
		- eni := eni
		+ eni := &eni

This should be fixed by this week's upgrade to Go 1.22 (language change to "for" loop variables): #36996.

@vamshidhar-rapolu After tomorrow's Terraform AWS Provider v5.47.0 release could you please download the new version and retry? Thanks.

[vamshidhar-rapolu]

@ewbankkit The issue seems to be resolved with 5.47.0. I don't see any errors with the deletion of security group.

[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 v5.47.0 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!