ApplicationLoadBalancedFargateService : Add Support for IPv6 on LB's

[jlouk]

Describe the feature

I would like to enable IPv6 support on the load balancers created by ApplicationLoadBalancedFargateService and ApplicationLoadBalancedEc2Service.

Ideally this could be used as a new property for these two classes.``

Use Case

With the introduction of AWS charging for public IPv4 addresses (source), I am looking to enable IPv6 addresses on my ECS ALBs.

Proposed Solution

In the elbv2.ApplicationLoadBalancer class, there is a property for ipv6:

new elbv2.ApplicationLoadBalancer(stack, 'ALB', {
  vpc,
  internetFacing: true,
  ipAddressType: elbv2.IpAddressType.DUAL_STACK,
});

My proposal would be to add the property ipAddressType to ApplicationLoadBalancedFargateService and ApplicationLoadBalancedEc2Service with the corresponding actions to enable when necessary. The default would be elbv2.IpAddressType.IPV4 which would make this an opt-in service.

Other Information

No response

Acknowledgements

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

CDK version used

2.126.0

Environment details (OS name and version, etc.)

MacOS Monterey 12.7

[pahud]

We welcome the PRs and before that I guess we could always doing escape hatches using addPropertyOverride() to achieve that.

[jmnarloch]

@pahud Do you think you could review the Application Load Balancer PR(https://github.com/aws/aws-cdk/pull/30089#issuecomment-2201231428)? I would like to enable IPv6 Load Balancer in my production stack. I can also give the PR a first review.

[pahud]

@jmnarloch I've escalated this PR review to the team. The maintainer should take a look shortly. Thank you for letting me know.

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