如何将 ssl 证书列表添加到我使用 Terraform for 循环构造之一创建的 alb 侦听器列表中？

Question

在 AWS 上，使用 Terraform 可以向 ALB 侦听器添加多个 ssl 证书。我可以通过创建一个监听器资源并创建多个 aws_lb_listener_certificate 资源来做到这一点。

所以这样的东西可以正常工作：

 resource "aws_alb_listener" "alb_listener" {  
      load_balancer_arn = aws_alb.alb.arn  
      port              = 443  
      protocol          = "HTTPS"
      default_action {    
          target_group_arn = aws_alb_target_group.alb_target_group.arn
          type = lookup(var.alb_listener, "action")  
       }
  } 

resource "aws_lb_listener_certificate" "testme_ssl_cert" {
  listener_arn    = "${aws_alb_listener.alb_listener.arn}"
  certificate_arn = "${data.aws_acm_certificate.testme.arn}" 
}

但我正在尝试通过从 config.xml 构建我的侦听器来减少用于执行此操作的代码量。所以我可以从这样的地图变量中构建我的监听器。这很好用。

    resource "aws_lb_listener" "encrypted_listener" {
      load_balancer_arn       = aws_alb.alb.arn
      for_each = var.ssl_forwarding
          port                = each.key
          protocol            = each.value
          certificate_arn = lookup(var.default_certificate,each.key)
          default_action {
            target_group_arn = aws_alb_target_group.alb_target_group.arn
            type             = "forward"
          }   
    }

    variable "ssl_forwarding" {
        default = { 
            443 =   "HTTPS"
            8081 =   "HTTPS"         
      }

现在我想将其余的证书添加到我刚刚创建的侦听器中。

So I need something that looks like this (I think):

    variable "additional_certificates" {
        default=[
            "arn:aws:acm:eu-west-1:blah_blach_ect-3ba688bab27a", #cert 1
            "arn:aws:acm:eu-west-1:blah_blach_ect-4fa688deb27a", #cert 2
        ]
    }

    resource "aws_lb_listener_certificate" "ssl_certs" 
            listener_arn    = //for every listener that I just created
            certificate_arn = //add every certificate in additional_certificates
    }

我不明白如何处理众多听众。证书的多样性。最后是证书的多样性与听众的多样性。

**感谢所有有关如何解决此问题的建议。变通方法的建议也受到赞赏。谢谢.....

更新： 感谢 Marcin 的回答……但这只允许我添加一个额外的 SSL cer。 我认为 var 会看起来像这样......所以我可以将 n 个证书添加到 n 个负载均衡器。

variable "additional_certificates" {
     default = { 
       443 = ["arn:aws:acm:eu-west-1:blah_blah_ect1",
              "arn:aws:acm:eu-west-1:blah_blah_ect2"
              ""arn:aws:acm:eu-west-1:blah_blah_ect....n" //could be any number of certs here                                                                                                                      
             ]
       8081 = "arn:aws:acm:eu-west-1:blah_blach_ect-4fa688deb27a"
    }

Answer 1

我假设您的 aws_lb_listener.encrypted_listener 是有效的并且它有效，因为它没有在问题中另行指定。此外，如果additional_certificates 是一张地图会更好，因为您正在使用ssl_forwarding 的地图。因此，您的 ssl_certs 可能是：

variable "additional_certificates" {
     default = {
       443 = "arn:aws:acm:eu-west-1:blah_blach_ect-3ba688bab27a",
       8081 = "arn:aws:acm:eu-west-1:blah_blach_ect-4fa688deb27a"
    }
}

resource "aws_lb_listener_certificate" "ssl_certs" {
    
    for_each =  aws_lb_listener.encrypted_listener

    listener_arn    = each.value.arn
    certificate_arn = var.additional_certificates[each.key]
}

更新

如果您可以拥有随机数量的端口和随机数量的证书，我可以提出以下建议：

variable "additional_certificates" {

   default = { 
     443 = ["arn:aws:acm:eu-west-1:blah_blah_ect1",
            "arn:aws:acm:eu-west-1:blah_blah_ect2",
            "arn:aws:acm:eu-west-1:blah_blah_ect....n"
           ]
     8081 = ["arn:aws:acm:eu-west-1:blah_blach_ect-4fa688deb27a"]
     
     9999 = ["arn:aws:acm:eu-west-1:blah_blach_ect-223332",
             "arn:aws:acm:eu-west-1:blah_blach_ect-22222"]
  }
}


locals {
  # flatten the additional_certificates
  additional_certificates_flat = merge([
      for port, certs in var.additional_certificates:
        {for cert in certs: 
          "${port}-${cert}" => {"port" = port, "cert" = cert}
        }
  ]...)

}

var.additional_certificates 扁平化为 local.additional_certificates_flat 将是：

{
  "443-arn:aws:acm:eu-west-1:blah_blah_ect....n" = {
    "cert" = "arn:aws:acm:eu-west-1:blah_blah_ect....n"
    "port" = "443"
  }
  "443-arn:aws:acm:eu-west-1:blah_blah_ect1" = {
    "cert" = "arn:aws:acm:eu-west-1:blah_blah_ect1"
    "port" = "443"
  }
  "443-arn:aws:acm:eu-west-1:blah_blah_ect2" = {
    "cert" = "arn:aws:acm:eu-west-1:blah_blah_ect2"
    "port" = "443"
  }
  "8081-arn:aws:acm:eu-west-1:blah_blach_ect-4fa688deb27a" = {
    "cert" = "arn:aws:acm:eu-west-1:blah_blach_ect-4fa688deb27a"
    "port" = "8081"
  }
  "9999-arn:aws:acm:eu-west-1:blah_blach_ect-22222" = {
    "cert" = "arn:aws:acm:eu-west-1:blah_blach_ect-22222"
    "port" = "9999"
  }
  "9999-arn:aws:acm:eu-west-1:blah_blach_ect-223332" = {
    "cert" = "arn:aws:acm:eu-west-1:blah_blach_ect-223332"
    "port" = "9999"
  }
}

那么，

resource "aws_lb_listener_certificate" "ssl_certs" {
    
    for_each =  local.additional_certificates_flat

    listener_arn    = aws_lb_listener.encrypted_listener[each.value.port].arn
    certificate_arn = each.value.cert
}