aws_lb_listener.http_redirect Invalid Attribute Combination

[mission-ajennings]

Describe the Bug

In AWS provider 5.35.0 released 2/1/24 if you have a target group arn on a listener with type 'redirect' it will give this warning:

│ Warning: Invalid Attribute Combination
│
│   with module.alb.aws_lb_listener.http_redirect[0],
│   on .terraform/modules/alb/main.tf line 183, in resource "aws_lb_listener" "http_redirect":
│  183:     target_group_arn = one(aws_lb_target_group.default[*].arn)
│
│ Attribute "default_action[0].target_group_arn" cannot be specified when "default_action[0].type" is "redirect".
│
│ This will be an error in a future release.

Expected Behavior

No warnings (or future errors) when deploying a redirect listener.

Steps to Reproduce

Upgrade to AWS provider 5.35.0 and attempt to deploy an ALB with a redirect listener.

Screenshots

No response

Environment

No response

Additional Context

No response

[veqryn]

I received this warning even though I didn't specify the target arn at all:

resource "aws_lb_listener" "mylb" {
  load_balancer_arn = aws_lb.mylb.arn
  port              = "80"
  protocol          = "HTTP"

  default_action {
    type = "redirect"

    redirect {
      status_code = "HTTP_301"
      protocol    = "HTTPS"
      port        = "443"
    }
  }
}

╷
│ Warning: Invalid Attribute Combination
│
│   with aws_lb_listener.mylb,
│   on loadbalancer.tf line 96, in resource "aws_lb_listener" "mylb":
│   96:   default_action {
│
│ Attribute "default_action[0].target_group_arn" cannot be specified when "default_action[0].type" is "redirect".
│
│ This will be an error in a future release.

[rozen-dada]

Hey, I got the same issue. When i use redirect in default, it throws the same warning.