Terraform没有找到我传递的json变量。

Question

我对地形很陌生。

我有一个tfvars.json文件，我想用来传递我的服务器配置。

{
  "test": "test",
  "machines": {
    "master01": {
      "node_type": "master",
      "image": "ubuntu-20.04",
      "server_type": "cx21",
      "location": "nbg1"
    },
    "master02": {
        "node_type": "master",
        "image": "ubuntu-20.04",
        "server_type": "cx21",
        "location": "nbg1"
      }
  }
}

现在，在我的main.tf中，我想创建实例

############## Provider ################
terraform {
  required_providers {
    hcloud = {
      source = "hetznercloud/hcloud"
      version = "1.26.2"
    }
  }
}

############## Variables ###############

# Token variable
variable "hcloud_token" {
  default = "<Secret Key>"
}

# Define Hetzner provider
provider "hcloud" {
  token = "${var.hcloud_token}"
}

# Obtain ssh key data
data "hcloud_ssh_key" "ssh_key" {
  fingerprint = "<Secret Fingerprint>"
}

# Create Master Server
resource "hcloud_server" "master" {
  for_each = {
    for name, machine in var.machines :
    name => machine
    if machine.node_type == "master"
  }

  name = each.key
  image = each.image
  server_type = each.server_type
  location = each.location
  ssh_keys  = ["${data.hcloud_ssh_key.ssh_key.id}"]
}

当我跑的时候

$ terraform init
$ terraform apply -var-file tfvars.json -state terraform.tfstate -auto-approve

我得到以下错误

│ Warning: Value for undeclared variable
│ 
│ The root module does not declare a variable named "machines" but a value was found in file "tfvars.json".
│ If you meant to use this value, add a "variable" block to the configuration.
│ 
│ To silence these warnings, use TF_VAR_... environment variables to provide certain "global" settings to all
│ configurations in your organization. To reduce the verbosity of these warnings, use the -compact-warnings
│ option.
╵
╷
│ Error: Reference to undeclared input variable
│ 
│   on main.tf line 31, in resource "hcloud_server" "master":
│   31:     for name, machine in var.machines :
│ 
│ An input variable with the name "machines" has not been declared. This variable can be declared with a
│ variable "machines" {} block. 

警告给出了一些提示，我需要在根模块中提到这个变量，但是我甚至不知道我的根模块是什么，为什么不能像我现在这样传递变量呢？

Answer 1

您的错误信息：

一个名为“”的输入变量未被声明为

因此，您需要在main.tf文件中添加machines变量声明：

# machines variable
variable "machines" {}