无法从 ALB 模块的多个 ID 中检索单个 EC2 实例 ID

我正在尝试创建应用程序负载均衡器（ALB），并将目标类型设置为实例。我创建了 ec2 、ALB 、route53 、acm 模块以及支持资源。以下是代码文件：

白蛋白.tf

module "ec2_instance" {
  source  = "terraform-aws-modules/ec2-instance/aws"

  for_each = toset(["one", "two"])

  name = "bcr-templates-instance-${each.key}"

  instance_type          = "t2.micro"
  ami                    = data.aws_ami.bcr-templates-ami.id
  key_name               = "${aws_key_pair.generated_key.key_name}"
  monitoring             = true
  vpc_security_group_ids = [module.vpc.default_security_group_id]
  subnet_id              = module.vpc.public_subnets[0]

  tags = {
    Terraform   = "true"
    Environment = "dev"
  }
}


module "alb" {
  source  = "terraform-aws-modules/alb/aws"
  version = "~> 8.0"

  name = "bcr-templates-alb"

  load_balancer_type  = "application"

  vpc_id              = module.vpc.vpc_id
  subnets             = module.vpc.public_subnets
  security_groups     = [module.vpc.default_security_group_id]
 

  security_group_rules = {
    ingress_all_http = {
      type        = "ingress"
      from_port   = 80
      to_port     = 80
      protocol    = "tcp"
      description = "HTTP web traffic"
      cidr_blocks = ["0.0.0.0/0"]
    }
    ingress_all_icmp = {
      type        = "ingress"
      from_port   = -1
      to_port     = -1
      protocol    = "icmp"
      description = "ICMP"
      cidr_blocks = ["0.0.0.0/0"]
    }
    egress_all = {
      type        = "egress"
      from_port   = 0
      to_port     = 0
      protocol    = "-1"
      cidr_blocks = ["0.0.0.0/0"]
    }
  }

  target_groups = [
    {
      name_prefix      = "h1"
      backend_protocol = "HTTP"
      backend_port     = 80
      target_type      = "instance"
      targets = {
        ec2_target = {
          target_id = (element(tolist(module.ec2_instance,0)).id)
          port = 80
        }
        my_other_target = {
          target_id = (element(tolist(module.ec2_instance,1)).id)
          port = 8080
        }
      }
    }
  ]

  https_listeners = [
    {
      port               = 443
      protocol           = "HTTPS"
      certificate_arn    = module.acm.acm_certificate_arn
      target_group_index = 0
    }
  ]

  http_tcp_listeners = [
    {
      port               = 80
      protocol           = "HTTP"
      target_group_index = 0
    },
    {
      port        = 81
      protocol    = "HTTP"
      action_type = "forward"
      forward = {
        target_groups = [
          {
            target_group_index = 0
            weight             = 100
          },
          {
            target_group_index = 1
            weight             = 0
          }
        ]
      }
    },
    {
      port        = 82
      protocol    = "HTTP"
      action_type = "redirect"
      redirect = {
        port        = "443"
        protocol    = "HTTPS"
        status_code = "HTTP_301"
      }
    },
    {
      port        = 83
      protocol    = "HTTP"
      action_type = "fixed-response"
      fixed_response = {
        content_type = "text/plain"
        message_body = "Fixed message"
        status_code  = "200"
      }
    },
  ]

  tags = {
    Environment = "dev"
  }
}

输出.tf

output "ami" {

description = "AMI ID that was used to create the instance"  

 value          = toset([ for v in module.ec2_instance : v.ami ]) 

} 

output "id" {  

description = "The ID of the instance"

value           = values(module.ec2_instance)[*].id
}

Terraform 版本是 1.4.6

我试图在 ALB 模块中使用 ec2 模块的输出值来获取单个 ec2 实例 id，但出现以下错误：

Error: Not enough function arguments

  on alb.tf line 274, in module "alb":
 274:           target_id = (element(tolist(module.ec2_instance,0)).id)
    ├────────────────
    │ while calling element(list, index)
    │ module.ec2_instance is a map of object

Function "element" expects 2 argument(s). Missing value for "index".

Error: Not enough function arguments

  on alb.tf line 278, in module "alb":
 278:           target_id = (element(tolist(module.ec2_instance,1)).id)
    ├────────────────
    │ while calling element(list, index)
    │ module.ec2_instance is a map of object

Function "element" expects 2 argument(s). Missing value for "index".

有人可以帮我解决这个问题吗？