如何将 ssl 证书列表添加到我使用 Terraform 之一为循环构造创建的 alb 侦听器列表中？

Question

在 AWS 上，使用 Terraform 可以将多个 ssl 证书添加到 ALB 侦听器。 我可以通过创建侦听器资源并创建多个 aws_lb_listener_certificate 资源来做到这一点。

所以像这样的东西很好用：

 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}" 
}

但是我试图通过从配置中构建我的侦听器来减少我用来执行此操作的代码量。 所以我可以像这样从 map 变量构建我的听众。 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"         
      }

现在我想将证书的 rest 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
    }

我不明白如何处理听众的多样性。 证书的多样性。 最后，证书的多样性与听众的多样性有关。

**所有关于如何解决这个问题的建议表示赞赏。 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 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是有效的并且它可以工作，因为它没有在问题中另行指定。 另外，如果additional_certificates是 map 会更好，因为您将 map 用于ssl_forwarding 。 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}
        }
  ]...)

}

扁平化为local.additional_certificates_flat的var.additional_certificates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"
  }
}

然后，

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
}