• Description:
  Terraform is not only for cloud provisioning—it can also generate configuration files.Using the jsonencode() function, Terraform can convert maps, lists, or any structured data into a valid JSON file.
•  Requirements
   This method is commonly used for generating:
   App config files
   Microservice environment configs
   JSON-based settings for containers
   This exercise demonstrates dynamic file generation controlled by variables.

•  STEP 1 — Create project directory
   Create directory and navigate into it:

  mkdir terraform-json-generator
  cd terraform-json-generator
      

•  STEP 2 — Create variables.tf
   Create the variables file:

  nano variables.tf
      

   Add the following content:

  variable "config" {
    type = map(string)
    default = {
      app  = "terraform-demo"
      port = "9090"
      mode = "local"
    }
  }
      

•  STEP 3 — Create main.tf
   Create the main configuration file:

  nano main.tf
      

   Paste the following content:

  terraform {
    required_providers {
      local = {
        source  = "hashicorp/local"
        version = "~> 2.4"
      }
    }
  }
  
  provider "local" {}
  
  resource "local_file" "json_config" {
    filename = "${path.module}/config.json"
    content  = jsonencode(var.config)
  }
      

   This converts the map into a JSON structure.
•  STEP 4 — Initialize Terraform
   Initialize the project:

  terraform init
      

   Expected:

  Terraform has been successfully initialized!
      

•  STEP 5 — Apply Terraform
   Apply the configuration:

  terraform apply -auto-approve
      

   Terraform creates:

  config.json
      

   Expected Terminal Output:

  Apply complete!
      

•  STEP 6 — Verify JSON File
   Show the file:

  cat config.json
      

   Expected output:

  {"app":"terraform-demo","port":"9090","mode":"local"}
      

• 
• 
• 
• 
• 
• 
• 
• 
•