Load Balancer vs Application Gateway decision in Azure - Hands-On Comparison

Load Balancer vs Application Gateway Decision in Azure

📖 Scenario: You are setting up a web application in Azure. You need to decide whether to use an Azure Load Balancer or an Azure Application Gateway to distribute traffic to your backend servers.This project will guide you through creating a simple configuration to understand the difference between these two services.

🎯 Goal: Build a basic Azure infrastructure configuration that includes a Load Balancer and an Application Gateway setup. You will create the initial resource definitions, add configuration variables, implement the core routing logic, and finalize the setup to compare their roles.

📋 What You'll Learn

💡 Why This Matters

🌍 Real World

This project simulates setting up Azure networking components to distribute traffic efficiently to backend servers, a common task in cloud infrastructure.

💼 Career

Understanding the difference and configuration of Load Balancers and Application Gateways is essential for cloud engineers and architects managing Azure environments.

1

Create Azure Load Balancer resource

Create a variable called load_balancer that defines an Azure Load Balancer resource with a frontend IP configuration named LoadBalancerFrontEnd and a backend address pool named LoadBalancerBackEndPool.

Azure

# Your code here

Need a hint?

Define a dictionary named load_balancer with keys type, name, and properties. Inside properties, add frontendIPConfigurations and backendAddressPools with the specified names.

2

Create Azure Application Gateway resource

Create a variable called app_gateway that defines an Azure Application Gateway resource with a frontend IP configuration named AppGatewayFrontEnd, a backend address pool named AppGatewayBackEndPool, and HTTP settings named AppGatewayHttpSettings.

Azure

load_balancer = {
    "type": "Microsoft.Network/loadBalancers",
    "name": "myLoadBalancer",
    "properties": {
        "frontendIPConfigurations": [
            {
                "name": "LoadBalancerFrontEnd",
                "properties": {
                    "publicIPAddress": {
                        "id": "/subscriptions/xxxx/resourceGroups/myResourceGroup/providers/Microsoft.Network/publicIPAddresses/myPublicIP"
                    }
                }
            }
        ],
        "backendAddressPools": [
            {
                "name": "LoadBalancerBackEndPool"
            }
        ]
    }
}

# Your code here

Need a hint?

Define a dictionary named app_gateway with keys type, name, and properties. Inside properties, add frontendIPConfigurations, backendAddressPools, and backendHttpSettingsCollection with the specified names and settings.

3

Add routing rules for Load Balancer and Application Gateway

Add a load_balancer_rule dictionary that defines a Load Balancer rule named LBRule using frontend IP LoadBalancerFrontEnd and backend pool LoadBalancerBackEndPool. Also add an app_gateway_rule dictionary that defines an Application Gateway request routing rule named AppGatewayRule using frontend IP AppGatewayFrontEnd, backend pool AppGatewayBackEndPool, and HTTP settings AppGatewayHttpSettings.

Azure

load_balancer = {
    "type": "Microsoft.Network/loadBalancers",
    "name": "myLoadBalancer",
    "properties": {
        "frontendIPConfigurations": [
            {
                "name": "LoadBalancerFrontEnd",
                "properties": {
                    "publicIPAddress": {
                        "id": "/subscriptions/xxxx/resourceGroups/myResourceGroup/providers/Microsoft.Network/publicIPAddresses/myPublicIP"
                    }
                }
            }
        ],
        "backendAddressPools": [
            {
                "name": "LoadBalancerBackEndPool"
            }
        ]
    }
}

app_gateway = {
    "type": "Microsoft.Network/applicationGateways",
    "name": "myAppGateway",
    "properties": {
        "frontendIPConfigurations": [
            {
                "name": "AppGatewayFrontEnd",
                "properties": {
                    "publicIPAddress": {
                        "id": "/subscriptions/xxxx/resourceGroups/myResourceGroup/providers/Microsoft.Network/publicIPAddresses/myAppGatewayPublicIP"
                    }
                }
            }
        ],
        "backendAddressPools": [
            {
                "name": "AppGatewayBackEndPool"
            }
        ],
        "backendHttpSettingsCollection": [
            {
                "name": "AppGatewayHttpSettings",
                "properties": {
                    "port": 80,
                    "protocol": "Http"
                }
            }
        ]
    }
}

# Your code here

Need a hint?

Add the routing rules to the load_balancer and app_gateway dictionaries under their respective properties. Also add httpListeners and frontendPorts to the Application Gateway to complete the configuration.