Change Infrastructure

Now that we have bucket created, let’s modify it. Here’s the demo/main.tf again.

app/stacks/demo/main.tf

resource "random_pet" "this" {
  length = 1 # using 1, since default separator is '-', also account name can only be 24 characters, and lowercase letters
}

resource "azurerm_resource_group" "this" {
  name     = "demo-resources-${random_pet.this.id}"
  location = "eastus"
}

module "storage_account" {
  source                    = "../../modules/example"
  name                      =  "sa${random_pet.this.id}"
  resource_group_name       = azurerm_resource_group.this.name
  location                  = azurerm_resource_group.this.location
  enable_https_traffic_only = var.enable_https_traffic_only
}

As, you can see there’s a var.enable_https_traffic_only variable. One way to update the infrastructure is to change the variable in the variables.tf file directly.

app/stacks/demo/variables.tf

variable "enable_https_traffic_only" {
  description = "forces HTTPS if enabled"
  type        = string
  default     = true
}

However, you can also use tfvars files. Terraspace will automatically use app/stacks/demo/tfvars files according the TS_ENV value. The default value is TS_ENV=dev. We’ll use tfvars files so we can use the same code for different environments.

Generate Starter Tfvars Files

Addtionally, Terraspace can generate starter tfvar files for us with the terraspace seed command.

$ terraspace seed demo
Reading: .terraspace-cache/useast/dev/stacks/demo/variables.tf
      create  app/stacks/demo/tfvars/dev.tfvars
$

The produced file looks something like this:

app/stacks/demo/tfvars/dev.tfvars

# Optional variables:
# enable_https_traffic_only = true

Terraspace parses the demo/variables.tf file to generate the tfvars/dev.tfvars file. It detected that all the variables are optional. We’ll uncomment acl and change it to enable_https_traffic_only = false.

app/stacks/demo/tfvars/dev.tfvars

# Optional variables:
enable_https_traffic_only = true

Next, we’ll update the infrastructure.