Module composition patterns in Terraform - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a module source.

Terraform

module "network" {
  source = [1]
}

Drag options to blanks, or click blank then click option'

A"aws_vpc"

B"./modules/network"

C"terraform.io/modules"

D"network_module"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a module name instead of a path for source.

Omitting quotes around the source path.

The source attribute specifies the path to the module code. Using a relative path like "./modules/network" correctly points to a local module.

2fill in blank

medium

Complete the code to pass a variable to a module.

Terraform

module "compute" {
  source = "./modules/compute"
  instance_type = [1]
}

Drag options to blanks, or click blank then click option'

A"t2.micro"

Bt2.micro

Cinstance_type

Dvar.instance_type

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around string values.

Using variable names without the var. prefix.

Module input variables require values as strings or expressions. Here, the instance type must be a string, so it needs quotes: "t2.micro".

3fill in blank

hard

Fix the error in the module call to correctly reference an output.

Terraform

output "subnet_id" {
  value = module.network.[1]
}

Drag options to blanks, or click blank then click option'

Asubnet-id

Bsubnet

CsubnetId

Dsubnet_id

Attempts:

3 left

💡 Hint

Common Mistakes

Using camelCase or hyphens instead of underscores.

Referencing outputs that do not exist in the module.

Module outputs are referenced by their exact output name. If the module defines an output named subnet_id, it must be referenced exactly as module.network.subnet_id.

4fill in blank

hard

Fill both blanks to create a module block with a variable and output reference.

Terraform

module "storage" {
  source = [1]
  bucket_name = [2]
}

output "bucket" {
  value = module.storage.bucket_name
}

Drag options to blanks, or click blank then click option'

A"./modules/storage"

B"my-bucket"

Cvar.bucket_name

D"bucket_name"

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable references without defining them.

Not quoting string values.

The source must be a path string to the module. The bucket_name variable is set to a string value representing the bucket's name.

5fill in blank

hard

Fill all three blanks to define a module with variables and use an output in another resource.

Terraform

module "db" {
  source = [1]
  db_name = [2]
  db_user = [3]
}

resource "aws_db_instance" "main" {
  identifier = module.db.db_name
  username = module.db.db_user
  engine = "mysql"
  instance_class = "db.t3.micro"
}

Drag options to blanks, or click blank then click option'

A"./modules/database"

B"mydatabase"

C"admin"

D"database_module"

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect variable names.

Not quoting string values.

The source is the path to the database module. The variables db_name and db_user are set to string values representing the database name and user.