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Lab description

In this lab we learn about locals in Terraform.

Locals

Setup

Make sure you are in the correct folder:

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cd ~/terraform-labs

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cd ~/terraform-labs

If you were unable to complete the last lab, you can find a copy of the files in the solutions folder

1. Refactor main.tf to use locals

  1. Make below changes to main.tf so we are no longer hardcoding values.

    Please avoid copying and pasting unless specified. Authoring terraform config files on your own is the best way to learn terraform and understand how it works.

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     terraform {
   required_providers {
     azurerm = {
       source  = "hashicorp/azurerm"
       version = "~> 4.0"
     }
   }
 }
    
 provider "azurerm" {
   features {}
 }
    
 locals {
   prefix = "contoso"
   region = "UK South"
   tags = {
     cost_center = "contoso research"
   }
 }
    
 resource "azurerm_resource_group" "contoso_rg" {
   name     = "${local.prefix}_rg"
   location = local.region
   tags     = local.tags
 }
    
 resource "azurerm_resource_group" "contoso_dev_rg" {
   name     = "${local.prefix}_dev_rg"
   location = local.region
   tags     = local.tags
 }

  2. Run a plan and apply as we’ve done before.

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  terraform plan -out "contoso.tfplan"
  terraform apply "contoso.tfplan" 

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  terraform plan -out "contoso.tfplan"
  terraform apply "contoso.tfplan"

Your plan should add 2 resource groups.

Note: From now on, we will simply refer to these operations as plan and apply.

2. Verify

  1. Verify that resources have been created correctly as we’ve done before. (via azure portal or cli)
  2. Run a terraform show on the the state to ensure it’s correct and as expected.

3. Commit your changes to git

  1. Do a git add . and git commit -m "added locals" as before. Ensure that only the main.tf file gets added.
  2. Optionally, push it your remote if you have it setup.

4. Topics covered

Next Lab - Variables

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