IPv6 data attribute documented but not working

[realflash]

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Terraform Version

Terraform v0.12.24

• provider.aws v2.56.0

Affected Resource(s)

• aws_instance (data source not resource)

Terraform Configuration Files

resource "aws_instance" "instance" {
  ami = "ami-0ed2df11a6d41ea78"
  instance_type        = "t3.nano"
  availability_zone    = "eu-west-2b"
}
data "aws_instance" "instance_data" {
	instance_id = aws_instance.instance.id
}
output "ipv6_ips" {
	value = data.aws_instance.instance_data.ipv6_addresses
}

Expected Behavior

No error output.

Actual Behavior

Error: Unsupported attribute

  on no_subnet.tf line 11, in output "ipv6_ips":
  11: 	value = data.aws_instance.instance_data.ipv6_addresses

This object has no argument, nested block, or exported attribute named
"ipv6_addresses".

Steps to Reproduce

1. terraform plan

Important Factoids

It was me that "discovered" that an ipv6_addresses attribute existed but wasn't documented in hashicorp/terraform#14473 . If memory serves I was using the attribute in a route 53 record in the same root module as the instance, not as a data source. Now I come to use it conjunction with spot instances to gather data on the instance that has been deployed, I find it doesn't work. I wonder if it was missing from the aws_instance resource documentation at the time (it's there now and works), but in my commit I added it to the aws_instance data source documentation, thus documenting something Ihat was different to what I had actually tested. Or possibly that attribute was there and has subsequently been removed, which would make this a regression.

References

• Document AWS IPv6 address access terraform#14473
• Provide IPv6 address attributes on aws_instance and aws_network_interface #1060

[tophercullen]

@realflash ctrl+f for 'ipv6' on https://github.com/terraform-providers/terraform-provider-aws/blob/master/aws/data_source_aws_instance.go now returns 0 results.

Based on what you said in #14473, it seems to me it was removed.

[realflash]

Still broken in provider.aws v3.20.0

[realflash]

For those still affected by this, @rick-masters has asked you to react to his pull request #17859 in order to help maintainers gauge prioritisation for this to be merged. If you want this fixed, go vote now.

[github-actions]

This functionality has been released in v3.57.0 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]

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