如何遍历 terraform 中的地图变量 [英] How can I iterate through a map variable in terraform

问题描述

我正在尝试遍历变量类型映射，但我不确定如何

Im trying to iterate through a variable type map and i'm not sure how to

这是我目前所拥有的

在我的 main.tf 中:

In my main.tf:

resource "aws_route_53_record" "proxy_dns" {
  count = "${length(var.account_name)}"
  zone_id = "${infrastructure.zone_id}"
  name = "proxy-${element(split(",", var.account_name), count.index)}-dns
  type = CNAME
  ttl = 60
  records = ["{records.dns_name}"]
}

在我的 variables.tf 中

And in my variables.tf

variable "account_name" {
  type = "map"
  default = {
    "account1" = "accountA"
    "account2" = "accountB"
  }
}

我希望能够使用不同的帐户名创建多个资源

I want to be able to create multiple resources with the different account names

推荐答案

如果您使用的是 Terraform 0.12.6 或更高版本，则可以使用 for_each 而不是 count 为地图中的每个元素生成一个实例:

If you are using Terraform 0.12.6 or later then you can use for_each instead of count to produce one instance for each element in your map:

resource "aws_route53_record" "proxy_dns" {
  for_each = var.account_name

  zone_id = infrastructure.zone_id
  name    = "proxy-${each.value}-dns"
  # ... etc ...
}

for_each 优于 count 的主要优势在于 Terraform 将通过地图中的键识别实例，因此您将获得像 aws_route53_record 这样的实例.proxy_dns["account1"] 而不是 aws_route53_record.proxy_dns[0]，因此您可以在将来使用 Terraform 知道每个元素属于哪个特定实例的情况下从地图中添加和删除元素.

The primary advantage of for_each over count is that Terraform will identify the instances by the key in the map, so you'll get instances like aws_route53_record.proxy_dns["account1"] instead of aws_route53_record.proxy_dns[0], and so you can add and remove elements from your map in future with Terraform knowing which specific instance belongs to each element.

each.key 和 each.value 当 for_each 为用过的.它们分别计算当前地图元素的键和值.

each.key and each.value in the resource type arguments replace count.index when for_each is used. They evaluate to the key and value of the current map element, respectively.

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