Scalable Enterprise Web Routing: Azure App Gateway + VMSS with Azure CLI

Building a resilient web architecture requires more than just a single server. In this tutorial, we transition from simple load balancing to Layer 7 Application Routing . We will deploy a Virtual Machine Scale Set (VMSS) and front it with an Azure Application Gateway , all using the Azure CLI . 🏗️ The Architecture Unlike a standard Load Balancer (Layer 4), an Application Gateway (Layer 7) can make routing decisions based on HTTP headers and URL paths. We combine this with a VMSS to ensure our backend automatically scales based on demand. 🛠️ Objectives Deploy an Application Gateway for advanced web traffic management. Master Azure CLI for infrastructure automation. Utilize VMSS Extensions to "bootstrap" applications automatically. Setup a Mock Service using Python for isolated network testing. 💻 The Full Automation Script Copy and save this script as deploy_appgw.sh . If you are on Windows, you can run this in WSL or Azure Cloud Shell . #!/bin/bash # --- 1. Configuration --- rg = "my-au