Placement GroupName being specified causing conflict with HostResourceGroupArn

[mkey0bc]

AWS_INSTANCE resource instance fails to deploy to a dedicated host resource group using an AMI registered with license manager.

It appears that the placement property GroupName is being set even though the HostResourceGroupArn property is being specified by the registered AMI from license manager.

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Terraform CLI and Terraform AWS Provider Version

Terraform v0.14.3

Affected Resource(s)

• aws v3.22.0

Terraform Configuration Files

Please include all Terraform configurations required to reproduce the bug. Bug reports without a functional reproduction may be closed without investigation.

provider "aws" {
  profile = "my-profile"
  region  = "us-west-2"
}

resource "aws_instance" "hosttest" {
  ami           = "ami-###########"
  instance_type = "r5.large"
  subnet_id = "subnet-############"

  tags = {
    Name = "host-test"
  }
}

Debug Output

Panic Output

Expected Behavior

EC2 instance deployed on dedicated host resource group.

Actual Behavior

Error: Error launching source instance: InvalidParameterValue: Invalid value 'When HostResourceGroupArn is specified, Placement GroupName cannot be set.' for groupName.
        status code: 400, request id: 92732a93-966a-4123-96aa-08dcac07e380

Steps to Reproduce

1. terraform apply

Important Factoids

References

• [Adding minimum to support host_resource_group_arn #15785]

[YakDriver]

@mkey0bc Thank you for raising this issue. We believe that #26532 will resolve the issue. However, since we cannot test the functionality, please let us know if it works for you (likely v4.29.0).

The crux of the problem results fromplacement_group (ec2.RunInstanceInput.Placement.GroupName) always being set in API calls, even if to an empty string, if instance interruption behavior was not set or set to terminate. ec2.RunInstanceInput.Placement.GroupName cannot be set if launching in a License Manager (dedicated) host resource group. Even though the host_resource_group_arn argument was not previously available, the association can be done implicitly based on the AMI ID and the host resource group being set to "Allocate hosts automatically."

The solution is ensure that if placement_group is not set, ec2.RunInstanceInput.Placement.GroupName is also not set.

[github-actions]

This functionality has been released in v4.29.0 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.