如何在使用terraform时将变量插入json文件？

Question

这是模块文件夹结构。

json定义文件(machine_definition.json)

{
  "Comment": "A Hello World example of the Amazon States Language using Pass states",

  "StartAt": "Hello",
  "States": {
    "Hello": {
      "Type": "Pass",
      "Result": "Hello",
      "Next": "World"
    },
    "World": {
      "Type": "${var.test}",
      "Result": "World",
      "End": true
    }
  }
}

例如，我试图在这里输入var.test。如何使json文件检测到我的变量？

以下是步骤函数的定义

module "step-functions" {
  source  = "terraform-aws-modules/step-functions/aws"
  name = "env-${var.environment}-state-machine"
  definition = file("${path.module}/machine_definition.json")
  tags = var.tags
  service_integrations = {
    xray = {
      xray = true 
    }
  }


  cloudwatch_log_group_name = "env-${var.environment}-state-machine-logGroup"
  attach_policies = true
  number_of_policies = 2
  policies = ["arn:aws:iam::aws:policy/AmazonS3FullAccess", "arn:aws:iam::aws:policy/AWSLambda_FullAccess"]
    
}

Answer 1

变量不能以这种方式添加到文件中。为了实现您想要的，您需要使用templatefile 1内置功能。要实现这一点，您需要进行一些代码更改：

definition = templatefile("${path.module}/machine_definition.json", {
  type = var.test
})

然后，在JSON文件中，需要引用模板化变量(type)，如下所示：

{
  "Comment": "A Hello World example of the Amazon States Language using Pass states",

  "StartAt": "Hello",
  "States": {
    "Hello": {
      "Type": "Pass",
      "Result": "Hello",
      "Next": "World"
    },
    "World": {
      "Type": "${type}",
      "Result": "World",
      "End": true
    }
  }
}

这应该会正确地呈现文件。

1