Numeric functions (min, max, ceil) in Terraform - Mini Project: Build & Apply

Using Numeric Functions in Terraform

📖 Scenario: You are setting up a Terraform configuration to manage cloud resources. You need to use numeric functions to control resource counts and sizes based on given values.

🎯 Goal: Build a Terraform configuration that uses min, max, and ceil functions to calculate resource parameters.

📋 What You'll Learn

Create a variable with a list of numbers

Create a variable with a decimal number

Use min and max functions on the list

Use ceil function on the decimal number

💡 Why This Matters

🌍 Real World

Cloud engineers often need to calculate resource sizes or counts dynamically based on input values. Numeric functions like min, max, and ceil help automate these decisions.

💼 Career

Understanding Terraform numeric functions is essential for writing flexible infrastructure code that adapts to different environments and requirements.

1

Create a variable called numbers with the list [3, 7, 2, 9, 5]

Create a Terraform variable named numbers and assign it the list [3, 7, 2, 9, 5].

Terraform

variable "numbers" {
  # Your code here
}

Need a hint?

Use variable "numbers" { default = [...] } syntax to define the list.

2

Create a variable called decimal_value with the value 4.3

Create a Terraform variable named decimal_value and assign it the decimal number 4.3.

Terraform

variable "numbers" {
  default = [3, 7, 2, 9, 5]
}

variable "decimal_value" {
  # Your code here
}

Need a hint?

Use variable "decimal_value" { default = 4.3 } syntax to define the decimal number.

3

Create locals min_number and max_number using min and max functions on var.numbers

Create a locals block with two variables: min_number set to the minimum value of var.numbers using the min function, and max_number set to the maximum value of var.numbers using the max function.

Terraform

variable "numbers" {
  default = [3, 7, 2, 9, 5]
}

variable "decimal_value" {
  default = 4.3
}

locals {
  # Your code here
}

Need a hint?

Use min(var.numbers) and max(var.numbers) inside locals.

4

Add a local ceil_value using the ceil function on var.decimal_value

In the existing locals block, add a variable called ceil_value that uses the ceil function on var.decimal_value.

Terraform

variable "numbers" {
  default = [3, 7, 2, 9, 5]
}

variable "decimal_value" {
  default = 4.3
}

locals {
  min_number = min(var.numbers)
  max_number = max(var.numbers)
  # Your code here
}

Need a hint?

Add ceil_value = ceil(var.decimal_value) inside locals.