[Enhancement]: add support for enable_primary_ipv6 flag for aws_instance, aws_vpc_network_interface and aws_launch_template

[arianvp]

Description

In order to use IPV6 target groups (#35010 #36423 ) you need to set up your instance with a "Primary IPv6 address". For this you need to set the PrimaryIpv6 boolean on your network interface but the terraform provider doesn't expose this option

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

• aws_instance
• aws_launch_template
• aws_network_interface

Potential Terraform Configuration

resource "aws_instance" "web" {
  ami           = data.aws_ami.ubuntu.id
  instance_type = "t3.micro"

  ipv6_address_count = 1
  enable_primary_ipv6  = true


  tags = {
    Name = "HelloWorld"
  }
}

resource "aws_launch_template" "web" {
  name          = "web"
  image_id      = data.aws_ami.nixos.id
  instance_type = "t3.micro"

  network_interfaces {
    ipv6_address_count = 1
    enable_primary_ipv6  = true
  }
}


resource "aws_vpc_network_interface" "test" {
  subnet_id           = aws_subnet.public_a.id
  ipv6_address_count  = 1
  enable_primary_ipv6 = true
}

References

For the aws_vpc_network_interface resource we need to use the EnablePrimaryIpv6 field in CreateNetworkInterface https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_CreateNetworkInterface.html

For the aws_launch_template resource we need to set the PrimaryIpv6 field https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_LaunchTemplateInstanceNetworkInterfaceSpecificationRequest.html

This functionality was announced here: https://aws.amazon.com/about-aws/whats-new/2023/08/amazon-vpc-primary-ipv6-address-elastic-interface/

Would you like to implement a fix?

No

[github-actions]

Community Note

Voting for Prioritization

• Please vote on this issue by adding a 👍 reaction to the original post to help the community and maintainers prioritize this request.
• Please see our prioritization guide for information on how we prioritize.
• Please do not leave "+1" or other comments that do not add relevant new information or questions, they generate extra noise for issue followers and do not help prioritize the request.

Volunteering to Work on This Issue

• If you are interested in working on this issue, please leave a comment.
• If this would be your first contribution, please review the contribution guide.

[ankon]

Related/partial duplicate? #34038

[pdostal]

Hello, will be the enable_primary_ipv6 setting available also for aws_instance aws_network_interface? Thank you 🙏

[arianvp]

Yes #36425 adds support for all those. I'm just waiting for someone to review it

[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 v5.81.0 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!