Support the new alb target_type in aws_lb_target_group and aws_lb_target_group_attachment for Network Load Balancers

[KyleMarMcTVG]

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Description

AWS have added a new feature to Network Load Balancers, whereby they can now target an ALB via the ALB's ARN. This allows NLBs to perform level 4 load balancing and pass traffic directly to an ALB for level 7 load balancing.

New or Affected Resource(s)

• aws_lb_target_group
• aws_lb_target_group_attachment

Potential Terraform Configuration

resource "aws_lb_target_group" "alb_example" {
  name        = "tf-example-lb-tg"
  port        = 80
  protocol    = "HTTP"
  target_type = "alb"
  vpc_id      = aws_vpc.main.id
}

resource "aws_lb_target_group_attachment" "test" {
  target_group_arn = aws_lb_target_group.alb_example.arn
  target_id        = aws_lb.alb.arn
  port             = 80
}

References

• Blog post announcing new feature: https://aws.amazon.com/blogs/networking-and-content-delivery/application-load-balancer-type-target-group-for-network-load-balancer/
• https://docs.aws.amazon.com/elasticloadbalancing/latest/APIReference/API_CreateTargetGroup.html
• https://docs.aws.amazon.com/elasticloadbalancing/latest/APIReference/API_RegisterTargets.html
• https://docs.aws.amazon.com/elasticloadbalancing/latest/APIReference/API_DeregisterTargets.html
• https://docs.aws.amazon.com/elasticloadbalancing/latest/APIReference/API_TargetGroup.html

[ewbankkit]

Requires AWS SDK v1.40.50:

• Bump github.com/aws/aws-sdk-go from 1.40.48 to 1.40.50 #21065

As the target_type attribute is validated against the _Values() enum:

terraform-provider-aws/aws/resource_aws_lb_target_group.go

Lines 263 to 269 in baac4b0

	"target_type": {
	Type: schema.TypeString,
	Optional: true,
	Default: elbv2.TargetTypeEnumInstance,
	ForceNew: true,
	ValidateFunc: validation.StringInSlice(elbv2.TargetTypeEnum_Values(), false),
	},

, rebuilding with the relevant AWS SDK version should enable this feature.

[ricardo-aspira]

What is the expectation to have this ?

[ewbankkit]

@ricardosouzamorais It will be available in v3.61.0 of the Terraform AWS Provider, likely later today.

[ricardo-aspira]

Awesome! :-) Thanks for sharing that.

[pjaudiomv]

I just tested this out and works great, was able to swap out one of my lambdas and just use the alb as a target. Thank you.

[github-actions]

This functionality has been released in v3.62.0 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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