Terraform output command - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to display the output values after applying Terraform.

Terraform

terraform [1]

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

Aapply

Binit

Coutput

Dplan

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'terraform apply' instead of 'terraform output' to see outputs.

Using 'terraform plan' which only shows changes but not outputs.

The terraform output command shows the values of outputs defined in your Terraform configuration after you apply it.

2fill in blank

medium

Complete the command to show a specific output named 'instance_ip'.

Terraform

terraform output [1]

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

A-json

Binstance_ip

C-state

D-refresh

Attempts:

3 left

💡 Hint

Common Mistakes

Using flags like '-json' instead of the output variable name.

Omitting the output name to get all outputs instead of one.

Adding the output variable name after terraform output shows only that specific output value.

3fill in blank

hard

Fix the error in the command to output all values in JSON format.

Terraform

terraform output [1]

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

A-json

B-state=terraform.tfstate

C-refresh=false

D-var-file=prod.tfvars

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-state' or '-var-file' flags which do not affect output format.

Omitting the '-json' flag when JSON output is needed.

The -json flag outputs all Terraform outputs in JSON format, which is useful for automation.

4fill in blank

hard

Fill both blanks to create a command that outputs the 'db_password' value in JSON format.

Terraform

terraform output [1] [2]

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

A-json

Bdb_password

C-state=terraform.tfstate

D-refresh=false

Attempts:

3 left

💡 Hint

Common Mistakes

Placing the output name before the flag.

Using unrelated flags like '-state' or '-refresh' here.

To output a specific value in JSON, use the -json flag followed by the output name.

5fill in blank

hard

Fill all three blanks to output the 'app_url' value without refreshing state and in JSON format.

Terraform

terraform output [1] [2] [3]

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

A-refresh=false

B-json

Capp_url

D-state=terraform.tfstate

Attempts:

3 left

💡 Hint

Common Mistakes

Incorrect order of output name and flags.

Using unrelated flags like '-state' unnecessarily.

The command specifies the output name app_url, disables state refresh with -refresh=false, and formats output as JSON with -json.

Practice

1. What does the terraform output command do after you deploy your infrastructure?

easy

A. It deletes all deployed resources.

B. It initializes the Terraform backend.

C. It shows the values of outputs defined in your Terraform configuration.

D. It creates a new Terraform workspace.

Solution

1. Step 1: Understand the purpose of terraform output

   This command is used to display the output values defined in your Terraform files after deployment.

2. Step 2: Compare with other Terraform commands

   Other commands like terraform init initialize backend, and terraform destroy deletes resources, so they don't match.

3. Final Answer:

   It shows the values of outputs defined in your Terraform configuration. -> Option C

4. Quick Check:

   terraform output shows outputs = B [OK]

Hint: Outputs show deployed info, not create or delete [OK]

Common Mistakes:

• Confusing output with init or destroy commands
• Thinking output creates or deletes resources
• Assuming output shows plan details

2. Which is the correct syntax to get the value of a specific output named instance_ip in Terraform?

easy

A. terraform output instance_ip

B. terraform output -name=instance_ip

C. terraform output --get instance_ip

D. terraform output -o instance_ip

Solution

1. Step 1: Recall the basic syntax for output command

   The correct way to get a specific output is by running terraform output <output_name>.

2. Step 2: Check the options given

   Options B, C, and D use invalid flags or syntax not supported by Terraform.

3. Final Answer:

   terraform output instance_ip -> Option A

4. Quick Check:

   Use output plus name without flags = A [OK]

Hint: Just add output name after 'terraform output' [OK]

Common Mistakes:

• Using unsupported flags like -name or --get
• Adding extra options that cause errors
• Confusing output syntax with other commands

3. Given this Terraform output block:

output "server_ip" {
  value = aws_instance.web.public_ip
}

What will terraform output server_ip display after deployment?

medium

A. The instance ID of the AWS instance.

B. The private IP address of the AWS instance.

C. An error because output name is incorrect.

D. The public IP address of the deployed AWS instance.

Solution

1. Step 1: Understand the output block

   The output named "server_ip" returns the value of aws_instance.web.public_ip, which is the public IP address.

2. Step 2: Match output command result

   Running terraform output server_ip shows the value of that output, so it will display the public IP.

3. Final Answer:

   The public IP address of the deployed AWS instance. -> Option D

4. Quick Check:

   Output returns public_ip value = C [OK]

Hint: Output shows value assigned, here public_ip [OK]

Common Mistakes:

• Confusing public_ip with private_ip or instance ID
• Assuming output name causes error
• Expecting multiple values instead of one

4. You run terraform output but get an error: No outputs found. What is the most likely cause?

medium

A. No output blocks are defined in the Terraform configuration.

B. Terraform state file is corrupted.

C. You forgot to run terraform init.

D. You used the wrong output name.

Solution

1. Step 1: Analyze the error message

   The message "No outputs found" means Terraform did not find any output blocks in the configuration.

2. Step 2: Check other options

   State corruption or missing init usually cause different errors. Wrong output name causes errors only when specifying a name.

3. Final Answer:

   No output blocks are defined in the Terraform configuration. -> Option A

4. Quick Check:

   No outputs defined = No outputs found error [OK]

Hint: Define outputs to avoid 'No outputs found' error [OK]

Common Mistakes:

• Assuming state corruption without checking outputs
• Confusing missing init with output errors
• Using wrong output name without specifying it

5. You want to get all outputs in JSON format to use in a script. Which command should you run?

hard

A. terraform output --json-format

B. terraform output -json

C. terraform output json

D. terraform output --format=json

Solution

1. Step 1: Recall the flag for JSON output

   The correct flag to get outputs in JSON format is -json.

2. Step 2: Verify other options

   Options B, C, and D use incorrect or unsupported flags.

3. Final Answer:

   terraform output -json -> Option B

4. Quick Check:

   Use -json flag for JSON output [OK]

Hint: Add -json flag to output command [OK]

Common Mistakes:

• Using unsupported flags like --json-format or --format=json
• Forgetting the dash before json
• Trying to pass json as a positional argument