Terraform - 我如何 map 不同的 azure 环境变量文件？

Question

I have below two environments terraform files

1. devenv_variables.tfvars
2. testenv_variables.tfvars

Here is devenv_variables.tfvars

 location            = "westeurope"
 resource_group_name = "devenv-cloudresources-rg"

Here is testenv_variables.tfvars

 location            = "westeurope"
 resource_group_name = "testenv-cloudresources-rg"

Here is my main.tf

  # Configure the Microsoft Azure Provider
  provider "azurerm" {
       version = "=2.0.0"

       features {}

       subscription_id = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

   }

   provider "azurerm" {
       alias  = "testenv"
       subscription_id = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
    }


    # Create a resource group
    resource "azurerm_resource_group"  {
        provider = "azurerm.testenv" //How do I pass provider based on variables here?
        name     = "${var.resource_group_name}" 
        location = "${var.location}"
      }

My requirement is, based on passed tfvar file as parameter, it should choose the subscription.

   terraform apply  -var-file="devenv_variables.tfvars"

when I type below command resource shall create in test environment

   terraform apply  -var-file="testenv_variables.tfvars"

I think, I need to define client id, and password to login to respective subscriptions.

Answer 1

tfvars files should only contain the values of variables. The declaration of variables should happen in regular tf files.

variables.tf

    variable "location" { 
      type = "string"
      description = "The azure location where the resources is created"
    }

devenv_variables.tfvars

location     = "West Europe"

This tutorial can also help you with some more information and examples.

Answer 2

All you have to do this just make same variable name in both files. when you run the command terraform plan–var-file='variable's_file_name' & terraform apply–var-file='variable's_file_name' on that point terraform will get different value from different file.

for demo

variable.tf (contain all variables)

variable "resource_group" {
type = string
description = "Resource Group"
default = ""
}

dev.tfvars (contain development variable's values)

resource_group="name_of_my_resource_group_dev"

prod.tfvars (contain production variable's values)

resource_group="name_of_my_resource_group_prod"

now when you run command terraform plan–var-file='dev.tfvars' it take the value from dev.tfvars file.