aws_lb_listener_rule

error

aws_lb_listener_rule.this[1]: Creating...
  action.#:                      "" => "1"
  action.0.target_group_arn:     "" => "arn:aws:elasticloadbalancing:eu-west-1:123:targetgroup/ruletest/e0a6a30150466170"
  action.0.type:                 "" => "forward"
  arn:                           "" => "<computed>"
  condition.#:                   "" => "2"
  condition.2263785189.field:    "" => "host-header"
  condition.2263785189.values.#: "" => "1"
  condition.2263785189.values.0: "" => ""
  condition.2874205519.field:    "" => "path-pattern"
  condition.2874205519.values.#: "" => "1"
  condition.2874205519.values.0: "" => "/alldomains"
  listener_arn:                  "" => "arn:aws:elasticloadbalancing:eu-west-1:123:listener/app/tf-lb-20180131154942223800000001/43f10abe3d73532e/985381ef8afc3390"
  priority:                      "" => "101"

2018/01/31 17:53:49 [DEBUG] [aws-sdk-go] DEBUG: Request elasticloadbalancing/CreateRule Details:
---[ REQUEST POST-SIGN ]-----------------------------
POST / HTTP/1.1
Host: elasticloadbalancing.eu-west-1.amazonaws.com
User-Agent: aws-sdk-go/1.12.70 (go1.9.2; linux; amd64) APN/1.0 HashiCorp/1.0 Terraform/0.11.2

Action=CreateRule&
Actions.member.1.TargetGroupArn=arn%3Aaws%3Aelasticloadbalancing%3Aeu-west-1%3A123%3Atargetgroup%2Fruletest%2Fe0a6a30150466170&
Actions.member.1.Type=forward&
Conditions.member.1.Field=host-header&
Conditions.member.1.Values.member.1=& <----------- Value is empty
Conditions.member.2.Field=path-pattern&
Conditions.member.2.Values.member.1=%2Falldomains&
ListenerArn=arn%3Aaws%3Aelasticloadbalancing%3Aeu-west-1%3A123%3Alistener%2Fapp%2Ftf-lb-20180131154942223800000001%2F43f10abe3d73532e%2F985381ef8afc3390&
Priority=101&
Version=2015-12-01
-----------------------------------------------------

2018/01/31 17:53:49 [DEBUG] [aws-sdk-go] DEBUG: Response elasticloadbalancing/CreateRule Details:
---[ RESPONSE ]--------------------------------------
HTTP/1.1 400 Bad Request
Connection: close
Content-Length: 296
Content-Type: text/xml
Date: Wed, 31 Jan 2018 15:53:48 GMT
X-Amzn-Requestid: xxxc3

-----------------------------------------------------
2018/01/31 17:53:49 [DEBUG] [aws-sdk-go] <ErrorResponse xmlns="http://elasticloadbalancing.amazonaws.com/doc/2015-12-01/">
  <Error>
    <Type>Sender</Type>
    <Code>ValidationError</Code>
    <Message>A condition value cannot be empty</Message>
  </Error>
  <RequestId>xxxc3</RequestId>
</ErrorResponse>
2018/01/31 17:53:49 [DEBUG] [aws-sdk-go] DEBUG: Validate Response elasticloadbalancing/CreateRule failed, not retrying, error ValidationError: A condition value cannot be empty
	status code: 400, request id: xxx

main.tf

provider "aws" {
  version = "1.8.0"
  region = "eu-west-1"
}

variable "name" {
  default = "ruletest"
}


variable "input" {
  type = "list"
  default = [
    {path="/static/*",    host="example.com",    priority=100},
    {path="/alldomains",  host="",               priority=101}
  ]
}


module "vpc" {
  source = "github.com/terraform-aws-modules/terraform-aws-vpc"

  name = "${var.name}"
  cidr = "10.0.0.0/16"
  azs             = ["eu-west-1a", "eu-west-1b"]
  public_subnets  = ["10.0.0.0/24", "10.0.1.0/24"]
  enable_nat_gateway = false
  enable_vpn_gateway = false
}

resource "aws_lb" "this" {
  subnets         = ["${module.vpc.public_subnets}"]
}

resource "aws_lb_listener" "this" {
  load_balancer_arn = "${aws_lb.this.arn}"
  port              = "80"

  default_action {
    target_group_arn = "${aws_lb_target_group.this.arn}"
    type             = "forward"
  }
}

resource "aws_lb_target_group" "this" {
  name                 = "${var.name}"
  port                 = 80
  protocol             = "HTTP"
  vpc_id               = "${module.vpc.vpc_id}"
}

resource "aws_lb_listener_rule" "this" {
  count        = "${length(var.input)}"

  listener_arn = "${aws_lb_listener.this.arn}"
  priority     = "${lookup(var.input[count.index], "priority")}"
  action {
    type             = "forward"
    target_group_arn = "${aws_lb_target_group.this.arn}"
  }

  condition {
    field  = "path-pattern"
    values = ["${lookup(var.input[count.index], "path")}"]
  }
  condition {
    field  = "host-header"
    values = ["${lookup(var.input[count.index], "host")}"]
  }
}