[Enhancement]: include attachment state in the aws_ec2_transit_gateway_peering_attachment data source

[mattwilder]

Description

Similarly to the issue presented in #26754, it is impossible to fully automate the use of aws_ec2_transit_gateway_prefix_list_reference with peering attachments because there is no way to tell if the peering attachment has been accepted or not. If the aws_ec2_transit_gateway_peering_attachment data source were to include the attachment state, then one could prevent the creation of the prefix list reference until the attachment state is available.

Affected Resource(s) and/or Data Source(s)

• aws_ec2_transit_gateway_peering_attachment
• aws_ec2_transit_gateway_prefix_list_reference

Potential Terraform Configuration

resource "aws_ec2_managed_prefix_list" "this" {
  name = "My VPCs"
  address_family = "IPv4"
  max_entries = 10

  entry {
    cidr = "10.252.192.0/19"
    description = "My VPC"
  }
}

data "aws_ec2_transit_gateway_peering_attachment" "this" {
  id = "tgw-attach-example1"
}

resource "aws_ec2_transit_gateway_prefix_list_reference" "this" {
  count = data.aws_ec2_transit_gateway_peering_attachment.this.state == "available" ? 1 : 0

  prefix_list_id = aws_ec2_managed_prefix_list.this.id
  transit_gateway_attachment_id = "tgw-attach-example1"
  transit_gateway_route_table_id = "tgw-rtb-example1"
}

References

This would solve the same problem reported in #26754 in another way

Would you like to implement a fix?

None

[github-actions[bot]]

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[github-actions[bot]]

This functionality has been released in v5.41.0 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[bot]]

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