Outputs for module communication in Terraform - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define an output variable in a Terraform module.

Terraform

output "instance_ip" {
  value = [1]
}

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

Aaws_instance.example.public_ip

Bvar.instance_ip

Cmodule.network.subnet_id

Dlocal.ip_address

Attempts:

3 left

💡 Hint

Common Mistakes

Referencing a variable instead of a resource attribute.

Using a module output inside the same module.

The output value should reference the resource attribute you want to expose, here the public IP of the AWS instance.

2fill in blank

medium

Complete the code to access an output from a child module in the root module.

Terraform

output "db_endpoint" {
  value = module.database.[1]
}

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

Adb_endpoint

Boutput_endpoint

Cendpoint_url

Ddatabase_url

Attempts:

3 left

💡 Hint

Common Mistakes

Guessing output names instead of matching the child module's output.

Using resource names instead of output names.

To access a module output, use the exact output name defined in the child module, here 'db_endpoint'.

3fill in blank

hard

Fix the error in the output block to correctly expose the subnet ID from the module.

Terraform

output "subnet_id" {
  value = [1]
  description = "Subnet ID from the network module"
}

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

Alocal.subnet_id

Bvar.subnet_id

Cmodule.network.subnet_id

Daws_subnet.main.id

Attempts:

3 left

💡 Hint

Common Mistakes

Referencing a variable instead of a module output.

Using a resource directly inside an output in the root module.

The output should reference the module's output attribute, not a variable or local value.

4fill in blank

hard

Fill both blanks to define and access an output named 'bucket_name' from a module.

Terraform

module "storage" {
  source = "./modules/storage"
}

output "bucket_name" {
  value = module.storage.[1]
}

# Inside the storage module:
output "[2]" {
  value = aws_s3_bucket.main.bucket
}

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

Abucket_name

Bbucket_id

Cbucket

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for the output inside and outside the module.

Referencing resource attributes directly outside the module.

The output name must be consistent inside the module and when accessed outside. Both blanks should be 'bucket_name'.

5fill in blank

hard

Fill all three blanks to correctly define outputs in a module and access them in the root module.

Terraform

module "web" {
  source = "./modules/webserver"
}

output "web_ip" {
  value = module.web.[1]
}

# Inside the webserver module:
output "[2]" {
  value = aws_instance.web.public_ip
}

output "[3]" {
  value = aws_instance.web.id
}

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

Ainstance_ip

Bweb_ip

Cinstance_id

Dweb_id

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatching output names between module and root.

Trying to access resource attributes directly outside the module.

The root module accesses outputs by the exact names defined inside the child module. Here, 'web_ip' and 'instance_id' are the output names inside the module, and 'web_ip' is accessed outside.