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‎3_networking/load-balancer/README.md‎

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# Terraform Template - Azure Load Balancer
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Costa Rica
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[![GitHub](https://img.shields.io/badge/--181717?logo=github&logoColor=ffffff)](https://github.com/)
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[brown9804](https://github.com/brown9804)
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Last updated: 2025-06-12
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----------
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> This template contains Terraform configurations to create and manage an Azure Load Balancer with its associated components including public IP, backend pool, health probe, and load balancing rules.
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> [!NOTE]
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> The Load Balancer configuration uses Standard SKU which provides enhanced features and scalability compared to Basic SKU.
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<p align="center">
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<img width="750" alt="image" src="https://github.com/user-attachments/assets/b4f46023-3b27-4ff3-a637-dfc9deedf4aa">
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</p>
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## File Descriptions
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- **main.tf**: Contains the main configuration for creating the Azure Load Balancer and its associated resources.
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- **variables.tf**: Defines the input variables used in the Terraform configuration.
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- **provider.tf**: Configures the Azure provider to interact with Azure resources.
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- **terraform.tfvars**: Provides default values for the variables defined in `variables.tf`.
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- **outputs.tf**: Defines the outputs such as Load Balancer ID and public IP address.
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## Variables
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> Below is a list of variables used in this template, their expected values, types, and examples:
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| Variable Name | Description | Type | Example Value |
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|--------------|-------------|------|---------------|
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| `subscription_id` | The Azure subscription ID | string | `"your-subscription-id"` |
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| `resource_group_name` | The name of the resource group | string | `"my-resource-group"` |
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| `location` | The Azure region to deploy resources | string | `"eastus"` |
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| `load_balancer_name` | The name of the load balancer | string | `"my-load-balancer"` |
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| `public_ip_name` | The name of the public IP address | string | `"my-lb-public-ip"` |
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| `frontend_ip_configuration_name` | Name of the frontend IP configuration | string | `"frontend-ip-config"` |
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| `backend_pool_name` | Name of the backend address pool | string | `"backend-pool"` |
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| `health_probe_name` | Name of the health probe | string | `"health-probe"` |
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| `lb_rule_name` | Name of the load balancer rule | string | `"lb-rule"` |
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| `lb_sku` | SKU of the load balancer | string | `"Standard"` |
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| `probe_protocol` | Protocol for health probe | string | `"Tcp"` |
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| `probe_port` | Port for health probe | number | `80` |
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| `frontend_port` | Frontend port for load balancer rule | number | `80` |
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| `backend_port` | Backend port for load balancer rule | number | `80` |
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| `tags` | Tags to apply to all resources | map | `{ "Environment": "Production" }` |
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## Usage
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1. Clone the repository and navigate to the load balancer directory
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2. Update the `terraform.tfvars` file with your values
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3. Initialize and apply the Terraform configuration:
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```bash
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terraform init
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terraform plan
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terraform apply
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```
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## Outputs
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| Output Name | Description |
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|-------------|-------------|
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| `load_balancer_id` | The ID of the Load Balancer |
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| `public_ip_address` | The public IP address of the Load Balancer |
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| `backend_pool_id` | The ID of the Backend Address Pool |
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| `frontend_ip_configuration_id` | The ID of the Frontend IP Configuration |
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<div align="center">
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<h3 style="color: #4CAF50;">Total Visitors</h3>
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<img src="https://profile-counter.glitch.me/brown9804/count.svg" alt="Visitor Count" style="border: 2px solid #4CAF50; border-radius: 5px; padding: 5px;"/>
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</div>

‎3_networking/load-balancer/main.tf‎

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# main.tf
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# This file contains the main configuration for creating the Azure Load Balancer and its associated resources.
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# Resource Group for Load Balancer
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resource "azurerm_resource_group" "lb" {
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name = var.resource_group_name
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location = var.location
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tags = var.tags
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}
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# Public IP for Load Balancer
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resource "azurerm_public_ip" "lb" {
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name = var.public_ip_name
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location = azurerm_resource_group.lb.location
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resource_group_name = azurerm_resource_group.lb.name
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allocation_method = "Static"
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sku = var.lb_sku
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tags = var.tags
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}
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# Azure Load Balancer
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resource "azurerm_lb" "lb" {
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name = var.load_balancer_name
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location = azurerm_resource_group.lb.location
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resource_group_name = azurerm_resource_group.lb.name
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sku = var.lb_sku
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frontend_ip_configuration {
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name = var.frontend_ip_configuration_name
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public_ip_address_id = azurerm_public_ip.lb.id
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}
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tags = var.tags
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}
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# Backend Address Pool for Load Balancer
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resource "azurerm_lb_backend_address_pool" "lb" {
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name = var.backend_pool_name
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loadbalancer_id = azurerm_lb.lb.id
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}
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# Health Probe for Load Balancer
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resource "azurerm_lb_probe" "lb" {
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name = var.health_probe_name
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loadbalancer_id = azurerm_lb.lb.id
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protocol = var.probe_protocol
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port = var.probe_port
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interval_in_seconds = 15
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number_of_probes = 2
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}
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# Load Balancer Rule
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resource "azurerm_lb_rule" "lb" {
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name = var.lb_rule_name
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loadbalancer_id = azurerm_lb.lb.id
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protocol = "Tcp"
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frontend_port = var.frontend_port
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backend_port = var.backend_port
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frontend_ip_configuration_name = var.frontend_ip_configuration_name
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backend_address_pool_ids = [azurerm_lb_backend_address_pool.lb.id]
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probe_id = azurerm_lb_probe.lb.id
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enable_floating_ip = false
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idle_timeout_in_minutes = 4
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}

‎3_networking/load-balancer/outputs.tf‎

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# outputs.tf
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# This file defines the outputs of the Terraform configuration.
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output "resource_group_name" {
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value = azurerm_resource_group.lb.name
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}
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output "load_balancer_id" {
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description = "The ID of the Load Balancer"
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value = azurerm_lb.lb.id
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}
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output "public_ip_address" {
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description = "The public IP address of the Load Balancer"
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value = azurerm_public_ip.lb.ip_address
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}
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output "backend_pool_id" {
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description = "The ID of the Backend Address Pool"
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value = azurerm_lb_backend_address_pool.lb.id
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}
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output "frontend_ip_configuration_id" {
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description = "The ID of the Frontend IP Configuration"
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value = azurerm_lb.lb.frontend_ip_configuration[0].id
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}

‎3_networking/load-balancer/provider.tf‎

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# provider.tf
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# This file configures the Azure provider to interact with Azure resources.
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# It specifies the required provider and its version, along with provider-specific configurations.
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terraform {
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required_version = ">= 1.8, < 2.0"
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# Specify the required provider and its version
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required_providers {
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azurerm = {
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source = "hashicorp/azurerm" # Source of the AzureRM provider
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version = "~> 4.16.0" # Version of the AzureRM provider
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}
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}
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}
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provider "azurerm" {
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features {} # Enable all features for the AzureRM provider
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subscription_id = var.subscription_id # Use the subscription ID variable
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}

‎3_networking/load-balancer/terraform.tfvars‎

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# terraform.tfvars
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# This file provides default values for the variables defined in variables.tf.
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# These values can be overridden by specifying different values during Terraform execution.
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# Azure Subscription
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subscription_id = ""
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# Resource Group
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resource_group_name = "your-resource-group-name"
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location = "eastus"
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# Load Balancer Configuration
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load_balancer_name = "my-load-balancer"
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public_ip_name = "my-lb-public-ip"
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frontend_ip_configuration_name = "frontend-ip-config"
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backend_pool_name = "backend-pool"
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health_probe_name = "health-probe"
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lb_rule_name = "lb-rule"
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lb_sku = "Standard"
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probe_protocol = "Tcp"
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probe_port = 80
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frontend_port = 80
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backend_port = 80
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# Tags
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tags = {
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Environment = "Production"
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Project = "MyProject"
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Owner = "TeamName"
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}

‎3_networking/load-balancer/variables.tf‎

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# variables.tf
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# This file defines the input variables used in the Terraform configuration.
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# Each variable includes a description and type.
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variable "subscription_id" {
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description = "The Azure subscription ID"
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type = string
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}
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variable "resource_group_name" {
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description = "The name of the resource group"
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type = string
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}
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variable "location" {
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description = "The Azure region to deploy resources"
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type = string
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}
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variable "load_balancer_name" {
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description = "The name of the load balancer"
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type = string
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}
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variable "public_ip_name" {
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description = "The name of the public IP address"
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type = string
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}
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variable "frontend_ip_configuration_name" {
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description = "Name of the frontend IP configuration"
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type = string
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default = "frontend-ip-config"
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}
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variable "backend_pool_name" {
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description = "Name of the backend address pool"
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type = string
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default = "backend-pool"
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}
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variable "health_probe_name" {
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description = "Name of the health probe"
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type = string
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default = "health-probe"
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}
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variable "lb_rule_name" {
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description = "Name of the load balancer rule"
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type = string
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default = "lb-rule"
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}
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variable "lb_sku" {
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description = "SKU of the load balancer (Basic or Standard)"
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type = string
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default = "Standard"
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}
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variable "probe_protocol" {
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description = "Protocol for health probe"
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type = string
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default = "Tcp"
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}
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variable "probe_port" {
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description = "Port for health probe"
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type = number
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default = 80
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}
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variable "frontend_port" {
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description = "Frontend port for load balancer rule"
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type = number
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default = 80
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}
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variable "backend_port" {
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description = "Backend port for load balancer rule"
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type = number
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default = 80
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}
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variable "tags" {
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description = "Tags to apply to all resources"
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type = map(string)
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default = {}
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}

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