Why resources are Terraform's core - See It in Action

Why resources are Terraform's core

📖 Scenario: Imagine you want to create a simple cloud setup with a virtual server. Terraform helps you do this by defining resources, which are like building blocks for your cloud environment.

🎯 Goal: You will create a Terraform configuration that defines a single cloud resource, then add a variable to configure it, apply the main logic to set its properties, and finally complete the configuration to make it deployable.

📋 What You'll Learn

Create a Terraform resource block for an AWS EC2 instance

Add a variable to set the instance type

Use the variable inside the resource configuration

Complete the resource with a required tag

💡 Why This Matters

🌍 Real World

Cloud engineers use Terraform resources to define and manage servers, databases, and networks in a repeatable way.

💼 Career

Understanding resources is essential for roles like Cloud Engineer, DevOps Engineer, and Infrastructure Developer who automate cloud setups.

1

Create the initial resource block

Write a Terraform resource block named aws_instance with the resource name example. Set the ami attribute to the exact value "ami-12345678".

Terraform

# Your code here

Need a hint?

The resource block starts with resource "aws_instance" "example" { and ends with }. Inside, set ami = "ami-12345678".

2

Add a variable for instance type

Create a Terraform variable named instance_type with the default value "t2.micro".

Terraform

resource "aws_instance" "example" {
  ami = "ami-12345678"
}

# Your code here

Need a hint?

Use variable "instance_type" { default = "t2.micro" } to define the variable.

3

Use the variable inside the resource

Inside the aws_instance.example resource block, add the attribute instance_type and set it to use the variable instance_type with var.instance_type.

Terraform

resource "aws_instance" "example" {
  ami = "ami-12345678"
  # Your code here
}

variable "instance_type" {
  default = "t2.micro"
}

Need a hint?

Inside the resource block, add instance_type = var.instance_type to connect the variable.

4

Add a tag to complete the resource

Inside the aws_instance.example resource block, add a tags block with a single tag Name set to "ExampleInstance".

Terraform

resource "aws_instance" "example" {
  ami = "ami-12345678"
  instance_type = var.instance_type
  # Your code here
}

variable "instance_type" {
  default = "t2.micro"
}

Need a hint?

Add a tags block with Name = "ExampleInstance" inside the resource.