Terraform 可重用变量块

Question

我的 terraform 配置中有两个 lambda，我希望它们具有完全相同的环境变量。

我不想每次修改一个 lambda 环境块时都需要修改它。是否有可能有某种可重用的块？

所以代替这个：

resource "aws_lambda_function" "f1" {
   <..>
   environment {
    variables = {
      ENV_STAGE = "${lower(var.environment)}" # all of these will always be same for both lambdas
      A = "A"
    }
  }
}

resource "aws_lambda_function" "f2" {
  <..>
  environment {
    variables = {
      ENV_STAGE = "${lower(var.environment)}"
      A = "A"
    }
  }
}

它会是这样的：

env = {
    variables = {
      ENV_STAGE = "${lower(var.environment)}"
      A = "A"
    }
 }

resource "aws_lambda_function" "f1" {
  <..>
  environment = env
}

resource "aws_lambda_function" "f2" {
  <..>
  environment = env
}

Answer 1

你需要一个当地人街区

locals {
  shared_env_variables = {
    ENV_STAGE = "${lower(var.environment)}"
    A = "A"
  }
}

resource "aws_lambda_function" "f1" {
  environment {
    variables = merge(local.shared_env_variables, {
       ONLY_FOR_F1: "something"
    })
  }
}

resource "aws_lambda_function" "f2" {
  environment {
    variables = local.shared_env_variables
  }
}

更高级的事情，例如基于地图创建资源，可以使用for_each