terraform aws 提供程序：在子模块中添加默认标签

Question

我在根模块 my_terraform 中使用 terraform aws 提供程序 default_tags 块。该模块有一个名为 my_submodule 的子模块，我想在该子模块中添加其他默认标签。我在 my_terraform/my_submodule/main.tf 中尝试过：

provider "aws" {
  default_tags {
    tags = {
      "extra_tag" = "something"
    }
  }
}

但我收到此错误：

$ terraform init
Initializing modules...
- my_terraform.my_submodule in my_terraform/my_submodule
There are some problems with the configuration, described below.

The Terraform configuration must be valid before initialization so that
Terraform can determine which modules and providers need to be installed.
╷
│ Error: Module module.my_submodule contains provider configuration
│ 
│ Providers cannot be configured within modules using count, for_each or depends_on.

有什么办法解决这个问题吗？

Answer 1

解决方法是为每个所需的标签集创建一个不同的别名提供程序块，并 显式地将其传递到每个子模块。

provider "aws" {
  default_tags {
    tags = {
      default_tag = "asdf"
    }
  }
}
provider "aws" {
  alias  = "foo"
  default_tags {
    tags = {
      default_tag = "asdf"
      extra_tag   = "foo"
    }
  }
}
provider "aws" {
  alias  = "bar"
  default_tags {
    tags = {
      default_tag = "asdf"
      extra_tag   = "bar"
    }
  }
}

module "foo" {
  source = "something"
  providers = {
    aws = aws.foo
  }
}
module "bar" {
  source = "something"
  providers = {
    aws = aws.bar
  }
}

Answer 2

您还可以在模块中的每个资源上手动定义标签，并使用全局变量调用它。

# Cloudwatch.tf

resource "aws_cloudwatch_log_group" "puma" {
  name              = "/${var.team_name}/puma"
  retention_in_days = 30
  tags = var.tags
}

# Variables.tf

variable "tags" {
  description = "Tags to apply to all resources"
  type        = map(string)
}

# parent file calling the module

locals {
  teams = {
    cheeze = {},
    pesto  = {}
  }
}

module "xxxx" {
  source   = "./xxxx/"
  for_each = local.teams

  team_name  = each.key
  # ...

  tags = {
    "Team" = each.key
  }
}