如何在 Terraform 中对资源名称使用多个循环

Question

我正在寻找一种通过循环两个 list(string) 类型变量来动态创建 AWS S3 存储桶的方法。这是我目前所拥有的：

variable "network" {
  type    = list(string)
  default = ["blue", "green", "orange"]
}

variable "type" {
  type    = list(string)
  default = ["ClientA", "ClientB"]
}

resource "aws_s3_bucket" "this" {
  for_each = var.type
  content {
    bucket   = "${each.key}-${var.network}.mysite.com"
    tags     = local.tags
  }
}

问题是我不确定如何也让它循环通过var.network。理想情况下，它应该根据上面的示例创建以下存储桶：

ClientA-blue.mysite.com
ClientA-green.mysite.com
ClientA-orange.mysite.com
ClientB-blue.mysite.com
ClientB-green.mysite.com
ClientB-orange.mysite.com

有人知道我如何实现吗？

Answer 1

你做的是flatten the outcome of some nested for's.

locals {
  networks = ["blue", "green", "orange"]
  types    = ["ClientA", "ClientB"]

  stuff = flatten([for network in local.networks : [
    for type in local.types : [
      "${type}-${network}.mysite.com"
    ]
  ]])
}

output "stuff" {
  value = local.stuff
}

产生：

Changes to Outputs:
  + stuff = [
      + "ClientA-blue.mysite.com",
      + "ClientB-blue.mysite.com",
      + "ClientA-green.mysite.com",
      + "ClientB-green.mysite.com",
      + "ClientA-orange.mysite.com",
      + "ClientB-orange.mysite.com",
    ]

在您的情况下，该资源如下所示：

resource "aws_s3_bucket" "this" {
  for_each = flatten([for network in var.network : [
    for type in var.type : [
      "${type}-${network}"
    ]
  ]])

  content {
    bucket = "${each.key}.mysite.com"
    tags   = local.tags
  }
}

Answer 2

虽然双 for 循环可能有效，但我建议使用 setproduct:

resource "aws_s3_bucket" "this" {
  for_each = toset([for p in setproduct(var.type, var.network) : "${p[0]}-${p[1]}"])
  bucket   = "${each.key}.mysite.com"
  tags     = local.tags
}

如何在 Terraform 中对资源名称使用多个循环

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