Terraform：如何在单个资源块中提供多个 lambda 函数 zip 文件

Posted 2023-03-24

【中文标题】Terraform：如何在单个资源块中提供多个 lambda 函数 zip 文件

【英文标题】：Terraform : how to provide multiple lambda fucntion zip files in a single resource block

【发布时间】：2021-12-09 14:09:03

【问题描述】：

为 1 个 lambda 函数工作的 sn-p。 Terraform 版本 0.14.9。

resource "aws_lambda_function" "main" 
     function_name = var.lambda_name
     role          = aws_iam_role.lambda.arn
     handler       = "index.handler"
     runtime       = "nodejs12.x"
     filename      = "testlambda1.zip"

variable "lambda_name" 
  default = "testlambda1"

我是 terraform 的新手。我总共有 4 个 zip 格式的 lambda 函数。如何在 1 个资源块中提供所有这些。

resource "aws_lambda_function" "main" 
      function_name = var.lambda_name
      role          = aws_iam_role.lambda.arn
      handler       = "index.handler"
      runtime       = "nodejs12.x"
      filename      = var.filename

variable "lambda_name" 
   type    = list(string)
   default = [
             "testlambda1",
             "testlambda2",
             "testlambda3",
             "testlambda4"
             ]

variable "filename" 
   type    = list(string)
   default = [
             "testlambda1.zip",
             "testlambda2.zip",
             "testlambda3.zip",
             "testlambda4.zip"
             ]

我尝试了这个，但最终出现了错误。

Error: Incorrect attribute value type

  on main-lambda.tf line 6, in resource "aws_lambda_function" "main":
   6:   function_name = var.lambda_name

Inappropriate value for attribute "function_name": string required.


Error: Incorrect attribute value type

  on main-lambda.tf line 10, in resource "aws_lambda_function" "main":
  10:   filename      = var.filename

Inappropriate value for attribute "filename": string required.

【问题讨论】：

我不知道这是否是您基础设施的“要求”，但对我来说看起来不太好。你检查过官方的 lambda 模块吗？ registry.terraform.io/modules/terraform-aws-modules/lambda/aws/… -- 或许能帮到你。

【参考方案1】：

如果您希望单个资源块创建多个资源，您需要使用 Terraform for_each 或 count 元参数。

例如：

resource "aws_lambda_function" "main" 
      count         = length(var.lambda_name)
      function_name = var.lambda_name[count.index]
      role          = aws_iam_role.lambda.arn
      handler       = "index.handler"
      runtime       = "nodejs12.x"
      filename      = var.filename[count.index]


variable "lambda_name" 
   type    = list(string)
   default = [
             "testlambda1",
             "testlambda2",
             "testlambda3",
             "testlambda4"
             ]


variable "filename" 
   type    = list(string)
   default = [
             "testlambda1.zip",
             "testlambda2.zip",
             "testlambda3.zip",
             "testlambda4.zip"
             ]

或将您的变量转换为地图，并使用for_each：

resource "aws_lambda_function" "main" 
      for_each      = var.lambdas
      function_name = each.key
      role          = aws_iam_role.lambda.arn
      handler       = "index.handler"
      runtime       = "nodejs12.x"
      filename      = each.value



variable "lambdas" 
   type    = map(string)
   default = 
             "testlambda1" = "testlambda1.zip",
             "testlambda2" = "testlambda2.zip",
             "testlambda3" = "testlambda3.zip",
             "testlambda4" = "testlambda4.zip"