Terraform.workspace interpolation - Mini Project: Build & Apply

Using Terraform.workspace Interpolation

📖 Scenario: You are managing infrastructure for multiple environments like development and production. You want to use Terraform to create resources that change based on the current workspace.

🎯 Goal: Build a Terraform configuration that uses terraform.workspace interpolation to set resource names dynamically depending on the active workspace.

📋 What You'll Learn

Create a Terraform variable to hold a base resource name

Define a local value that combines the base name with the current workspace using terraform.workspace

Create an AWS S3 bucket resource using the combined name

Add a tag to the bucket that shows the current workspace

💡 Why This Matters

🌍 Real World

Terraform workspaces help manage multiple environments like dev, test, and prod using the same configuration but different resource names.

💼 Career

Cloud engineers use <code>terraform.workspace</code> interpolation to write reusable infrastructure code that adapts to different deployment environments.

1

Create a Terraform variable for the base resource name

Create a Terraform variable called base_name with the default value myapp.

Terraform

# Your code here

Need a hint?

Use the variable block with default set to "myapp".

2

Define a local value combining base_name and terraform.workspace

Add a locals block with a local value called bucket_name that combines var.base_name and terraform.workspace separated by a dash.

Terraform

variable "base_name" {
  type    = string
  default = "myapp"
}

# Your code here

Need a hint?

Use locals block and string interpolation with var.base_name and terraform.workspace.

3

Create an AWS S3 bucket resource using the local bucket_name

Create a resource block aws_s3_bucket named example with the bucket name set to local.bucket_name.

Terraform

variable "base_name" {
  type    = string
  default = "myapp"
}

locals {
  bucket_name = "${var.base_name}-${terraform.workspace}"
}

# Your code here

Need a hint?

Use resource "aws_s3_bucket" "example" and set bucket = local.bucket_name.

4

Add a tag to the bucket showing the current workspace

Inside the aws_s3_bucket.example resource, add a tags block with a tag Environment set to terraform.workspace.

Terraform

variable "base_name" {
  type    = string
  default = "myapp"
}

locals {
  bucket_name = "${var.base_name}-${terraform.workspace}"
}

resource "aws_s3_bucket" "example" {
  bucket = local.bucket_name

  # Your code here
}

Need a hint?

Add a tags block with Environment = terraform.workspace inside the resource.