Have resource/aws_iot_topic_rule_destination return the ENI ids created as an attribute

[MickSheppardWB]

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Description

When an IOT rule destination is created a pair of ENIs are created with it. In order to make using these easier it would help if the ids of the ENIs were returned as an attribute of the aws_iot_topic_rule_destination resource.

To use a rule destination created in a public subnet you need to attach an Elastic IP (EIP) to each interface. The current method of doing this is quite involved. Adding this attribute would simplify operation and make the code more readable.

New or Affected Resource(s)

• aws_iot_topic_rule_destination

Potential Terraform Configuration

resource "aws_iot_topic_rule_destination" "example" {
  vpc_configuration {
    role_arn   = aws_iam_role.iot_core_rule_destination.arn
    vpc_id     = aws_vpc.main.id
    subnet_ids = [aws_subnet.main.id]
  }
}

output "iot_rule_destination_eni_ids" {
  value = aws_iot_topic_rule_destination.example.enis
}

resource "aws_eip" "example" {
  count = 2 # IOT rule destinations always have 2 ENIs

  vpc  = true

  network_interface = aws_iot_topic_rule_destination.example.enis[count.index
}

References

[github-actions[bot]]

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