aws-cloudfront-origins: add support for IPv6 origins

[tgmedia-nz]

Describe the feature

When defining a http (custom) origin, there is a new feature in CFN to define the origin "IpAddressType":

https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-properties-cloudfront-distribution-customoriginconfig.html

This allows

Allowed values: ipv4 | ipv6 | dualstack

Use Case

This is new and I'm needing to convert my environments all into IPv6 only and get away from IPv4 charges :)

Proposed Solution

This should probably be part of cloudfront_origins.HttpOrigin (https://docs.aws.amazon.com/cdk/api/v2/python/aws_cdk.aws_cloudfront_origins/HttpOrigin.html)

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

AWS CDK Library version (aws-cdk-lib)

python 2.214.0

AWS CDK CLI version

2.1021.0

Environment details (OS name and version, etc.)

MacOS 15.6.1

[pahud]

Hi @tgmedia-nz,

Great news! @badmintoncryer has already implemented this feature in PR #35445 🚀

The implementation adds:
• OriginIpAddressType enum with support for ipv4, ipv6, and dualstack
• ipAddressType property to HttpOriginProps
• Comprehensive unit and integration tests

Once the PR is merged, you'll be able to use IPv6-only origins like this:

import { HttpOrigin, OriginIpAddressType } from 'aws-cdk-lib/aws-cloudfront-origins';

const origin = new HttpOrigin('example.com', {
  ipAddressType: OriginIpAddressType.IPV6,
});

This should help you migrate to IPv6-only environments and avoid those IPv4 charges! The PR is currently under review and should be available in an upcoming CDK release.

Thanks for the feature request - it's exactly the kind of cost optimization improvement that benefits the entire CDK community.

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