4. Outputs

Contents

• Output Block
• Sensitive

---

The output block lets you expose information about your infrastructure. The value of an output block is similar to a return value in other programming languages. The output block serves four main purposes in Terraform:

• Child modules can expose resource attributes to parent modules.
• Root modules can display values in CLI output.
• Other Terraform configurations using remote state can access root module outputs with the terraform_remote_state data source.
• Passing information from a Terraform operation to an automation tool.

---

Output Block

output "<LABEL>" {
  value       = <EXPRESSION>
  description = "<STRING>"
  sensitive   = <true|false>
  ephemeral   = <true|false>
  depends_on  = [<REFERENCE>]
 
  precondition {
    condition     = <EXPRESSION>
    error_message = "<STRING>"
  }
}

The following arguments are supported in an output block:

Argument	Description	Type	Required?
value	The value Terraform returns for this output.	Expression	Required
description	A description of the output’s purpose and how to use it.	String	Optional
sensitive	Specifies if Terraform hides this value in CLI output.	Boolean	Optional
ephemeral	Specifies whether to prevent storing this value in state.	Boolean	Optional
depends_on	A list of explicit dependencies for this output.	List	Optional
precondition	A condition to validate before computing the output or storing it in state.	Block	Optional

---

Sensitive

If you use the terraform output command with the -json or -raw command-line flags, Terraform displays sensitive values in plain text.