📘 Terraform Series – Day 3

Terraform Blocks, Labels, and Arguments

In Day 2, we installed Terraform.
Now, before writing real infrastructure code, we must understand how Terraform actually reads and executes configurations.

👉 Every Terraform file is built using 3 core concepts:

• Blocks

• Labels

• Arguments

🔹 1. What is a Block?

👉 A block is the main building unit in Terraform used to define infrastructure or configuration.

📌 Example:

resource "aws_instance" "my_vm" {
}

👉 Meaning:

• Block tells Terraform what you want to create

📌 Common blocks:

• resource

• provider

• variable

• output

🔹 2. What are Labels?

👉 Labels are identifiers of a block that define resource type and name.

📌 Example:

resource "aws_instance" "my_vm" {
}

👉 Meaning:

• aws_instance → resource type

• my_vm → resource name

👉 Used to uniquely identify resources

🔹 3. What are Arguments?

👉 Arguments are key-value pairs inside a block used to configure the resource.

📌 Example:

instance_type = "t2.micro"

👉 Meaning:

• Defines how the resource should be created

• Controls behavior and properties

🔗 Combined Example

resource "aws_instance" "my_vm" {
  instance_type = "t2.micro"
}

👉 Breakdown:

• Block → resource

• Labels → aws_instance, my_vm

• Argument → instance_type

👨‍💻 About the Author

“A complete Terraform series covering everything from fundamentals to advanced real-world infrastructure automation in a DevOps environment.”

📬 Let's Stay Connected

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