r/aws_instance: add support for http_protocol_ipv6 to metadata_options

[kadrach]

Description

Adds support for enabling instance metadata IPv6 endpoint (e.g. for use in IPv6-only instances).

resource "aws_instance" "this" {
  // ...

  metadata_options {
    http_protocol_ipv6 = "enabled"
  }
}

Relations

Closes #22332.
Relates #20796.

References

https://aws.amazon.com/blogs/networking-and-content-delivery/introducing-ipv6-only-subnets-and-ec2-instances/

Output from Acceptance Testing

% make testacc AWS_DEFAULT_REGION=us-east-1 PKG=ec2 TESTS='TestAccEC2Instance_metadataOptions'
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/ec2/... -v -count 1 -parallel 20 -run='TestAccEC2Instance_metadataOptions'  -timeout 180m
=== RUN   TestAccEC2Instance_metadataOptions
=== PAUSE TestAccEC2Instance_metadataOptions
=== CONT  TestAccEC2Instance_metadataOptions
--- PASS: TestAccEC2Instance_metadataOptions (290.94s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/ec2        293.760s

[github-actions]

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[ewbankkit]

LGTM 🚀.

% make testacc TESTARGS='-run=TestAccEC2InstanceDataSource_metadataOptions\|TestAccEC2InstanceDataSource_basic\|TestAccEC2Instance_basic\|TestAccEC2Instance_metadataOptions' PKG=ec2 ACCTEST_PARALLELISM=2
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/ec2/... -v -count 1 -parallel 2  -run=TestAccEC2InstanceDataSource_metadataOptions\|TestAccEC2InstanceDataSource_basic\|TestAccEC2Instance_basic\|TestAccEC2Instance_metadataOptions -timeout 180m
=== RUN   TestAccEC2InstanceDataSource_basic
=== PAUSE TestAccEC2InstanceDataSource_basic
=== RUN   TestAccEC2InstanceDataSource_metadataOptions
=== PAUSE TestAccEC2InstanceDataSource_metadataOptions
=== RUN   TestAccEC2Instance_basic
=== PAUSE TestAccEC2Instance_basic
=== RUN   TestAccEC2Instance_metadataOptions
=== PAUSE TestAccEC2Instance_metadataOptions
=== RUN   TestAccEC2Instance_basicWithSpot
=== PAUSE TestAccEC2Instance_basicWithSpot
=== CONT  TestAccEC2InstanceDataSource_basic
=== CONT  TestAccEC2Instance_metadataOptions
--- PASS: TestAccEC2InstanceDataSource_basic (120.93s)
=== CONT  TestAccEC2Instance_basic
--- PASS: TestAccEC2Instance_basic (132.21s)
=== CONT  TestAccEC2Instance_basicWithSpot
--- PASS: TestAccEC2Instance_metadataOptions (277.08s)
=== CONT  TestAccEC2InstanceDataSource_metadataOptions
--- PASS: TestAccEC2Instance_basicWithSpot (131.69s)
--- PASS: TestAccEC2InstanceDataSource_metadataOptions (144.97s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/ec2	427.455s

[ewbankkit]

@kadrach Thanks for the contribution 🎉 👏.

[github-actions]

This functionality has been released in v5.12.0 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 pull request 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 related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.