构建具有多个级别的地图列表

Question

此snippet几乎完全显示了我要构建的内容。除了我的情况，我没有设置aws_lb的subnet_mapping列表，而是设置aws_cloudfront_distribution的来源列表。具体来说，请注意origin包含custom_origin_config，因此它是地图列表，其中地图的值是另一张地图的键。

我尝试这样做：

resource "aws_cloudfront_distribution" "foo" { 
    ...
    origin = "${null_resource.origins.*.triggers}"    
    ...
}

resource "null_resource" "origins" {
  count = "${length(var.origin_ids)}"
  triggers {
    domain_name = "${element(var.origin_domains, count.index)}"
    origin_id   = "${element(var.origin_ids, count.index)}"

    custom_origin_config {
      http_port              = "${local.http_port}"
      https_port             = "${local.https_port}"
      origin_protocol_policy = "http-only"
      origin_ssl_protocols   = "${local.origin_ssl_protocols}"
    }
}

但是我遇到了以下错误：

  

...不可转换类型'[] map [string] interface {}'

Answer 1

null_resource triggers仅排除任意字符串，因此将拒绝映射。由于您的null_resource并不依赖于custom_origin_config，因此看来count.index可能是过大的杀伤力。

有什么理由不能简单地做到这一点？

resource "aws_cloudfront_distribution" "foo" {
  count = length(local.origin_ids)

  origin {
    domain_name = var.origin_domains[count.index]
    origin_id   = var.origin_ids[count.index]

    custom_origin_config {
      http_port  = local.http_port
      https_port = local.https_port

      origin_protocol_policy = "http-only"
      origin_ssl_protocols   = local.origin_ssl_protocols
    }
  }
}