Terraform show for state inspection - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to display the current Terraform state in a human-readable format.

Terraform

terraform [1]

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

Ashow

Bapply

Cinit

Dplan

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'terraform apply' instead of 'terraform show'.

Confusing 'terraform plan' with 'terraform show'.

The terraform show command displays the current state of your infrastructure in a readable format.

2fill in blank

medium

Complete the command to show the Terraform state from a specific state file named 'prod.tfstate'.

Terraform

terraform show [1]

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

A-json

B-refresh=false

C-input=false

D-state=prod.tfstate

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-json' instead of '-state' to specify the file.

Omitting the state file option when multiple state files exist.

The -state=prod.tfstate option tells Terraform to show the state from the specified file.

3fill in blank

hard

Fix the error in the command to output the Terraform state in JSON format.

Terraform

terraform show [1]

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

A-output=json

B-state-json

C-json

D-format json

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-state-json' which is not a valid flag.

Using '-output=json' which is incorrect syntax.

The correct flag to output the state in JSON format is -json.

4fill in blank

hard

Fill both blanks to show the Terraform state in JSON format from a specific file named 'dev.tfstate'.

Terraform

terraform show [1] [2]

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

A-json

B-state=dev.tfstate

C-state=prod.tfstate

D-refresh=false

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the order of the flags.

Using the wrong state file name.

Use -state=dev.tfstate to specify the state file and -json to output in JSON format.

5fill in blank

hard

Fill all three blanks to show the Terraform state in JSON format from the state file 'terraform.tfstate' without refreshing.

Terraform

terraform show [1] [2] [3]

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

A-json

B-state=terraform.tfstate

C-state-out=staging.tfstate

D-refresh=false

Attempts:

3 left

💡 Hint

Common Mistakes

Using -state-out=staging.tfstate which writes output to a file.

Forgetting to disable refresh when inspecting without provider calls.

Use -state=terraform.tfstate to specify the state file, -refresh=false to disable refresh, and -json to output in JSON format.

Practice

1. What is the main purpose of the terraform show command?

easy

A. To apply changes to your infrastructure

B. To display the current state of your infrastructure managed by Terraform

C. To initialize a new Terraform working directory

D. To destroy all resources managed by Terraform

Solution

1. Step 1: Understand the role of terraform show

   This command is used to display the saved state of your infrastructure, showing what Terraform currently knows about your resources.

2. Step 2: Differentiate from other commands

   Commands like terraform apply, terraform init, and terraform destroy perform actions, but terraform show only displays information.

3. Final Answer:

   To display the current state of your infrastructure managed by Terraform -> Option B

4. Quick Check:

   terraform show = display state [OK]

Hint: Remember: show means display info, not change it [OK]

Common Mistakes:

• Confusing show with apply or destroy commands
• Thinking show modifies infrastructure
• Assuming show initializes Terraform

2. Which of the following is the correct syntax to display the Terraform state in JSON format?

easy

A. terraform show -json

B. terraform show --json-output

C. terraform show json

D. terraform show -format=json

Solution

1. Step 1: Recall the correct flag for JSON output

   The official Terraform command to show state in JSON format uses the -json flag.

2. Step 2: Verify other options

   Options like --json-output, json as a subcommand, or -format=json are not valid Terraform syntax.

3. Final Answer:

   terraform show -json -> Option A

4. Quick Check:

   Use -json flag for JSON output [OK]

Hint: Use '-json' flag exactly for JSON output [OK]

Common Mistakes:

• Adding extra words like '--json-output'
• Using subcommands instead of flags
• Mixing up flag syntax

3. Given the following Terraform state snippet shown by terraform show:

resource "aws_instance" "web" {
  id = "i-1234567890abcdef0"
  ami = "ami-0abcdef1234567890"
  instance_type = "t2.micro"
}

What will terraform show -json output include for the instance type?

medium

A. "instance_type": "t2.large"

B. "instance_type": "ami-0abcdef1234567890"

C. "instance_type": null

D. "instance_type": "t2.micro"

Solution

1. Step 1: Identify the instance_type in the state snippet

   The snippet shows instance_type = "t2.micro" for the resource.

2. Step 2: Understand JSON output reflects state values

   The JSON output from terraform show -json will include the exact value stored, which is "t2.micro".

3. Final Answer:

   "instance_type": "t2.micro" -> Option D

4. Quick Check:

   State value matches JSON output [OK]

Hint: JSON output matches exact state values [OK]

Common Mistakes:

• Confusing AMI ID with instance type
• Assuming default or null values
• Mixing resource attributes

4. You run terraform show -json but get an error: error: no state file found. What is the most likely cause?

medium

A. Terraform is not installed

B. The -json flag is not supported

C. Terraform state file does not exist in the current directory

D. The configuration files have syntax errors

Solution

1. Step 1: Understand the error message

   The error indicates Terraform cannot find the state file to show.

2. Step 2: Identify common reasons for missing state

   If the state file is missing from the current directory, terraform show cannot display state.

3. Final Answer:

   Terraform state file does not exist in the current directory -> Option C

4. Quick Check:

   Missing state file causes this error [OK]

Hint: Check if state file exists before show [OK]

Common Mistakes:

• Assuming -json flag is unsupported
• Thinking Terraform is not installed
• Blaming config syntax errors for state show

5. You want to programmatically extract the IDs of all AWS instances from your Terraform state. Which command and option combination is best suited for this task?

hard

A. terraform show -json | jq '.values.root_module.resources[] | select(.type=="aws_instance") | .values.id'

B. terraform show | grep aws_instance | awk '{print $2}'

C. terraform state list aws_instance

D. terraform output aws_instance_ids

Solution

1. Step 1: Understand the need for programmatic extraction

   You want to get instance IDs from the state in a machine-readable way.

2. Step 2: Evaluate command options

   terraform show -json outputs JSON, which can be filtered with jq to select AWS instances and extract their IDs. Other options either do not output JSON or do not extract IDs directly.

3. Final Answer:

   terraform show -json | jq '.values.root_module.resources[] | select(.type=="aws_instance") | .values.id' -> Option A

4. Quick Check:

   Use JSON output with jq for precise extraction [OK]

Hint: Use -json with jq to filter state data easily [OK]

Common Mistakes:

• Using grep/awk on human-readable output (fragile)
• Using terraform state list which lists names, not IDs
• Assuming terraform output has instance IDs without explicit output