Azure Architecture Guide

Web Application Architecture

What This Chapter Is About

Help readers design a practical Azure web application architecture by connecting public entry, hosting, data access, security, scaling, deployment, observability, and cost.

This chapter applies the service-selection decisions from Part 2 to a familiar pattern: a public or internal web application that serves users, calls APIs, stores data, and must be operated safely.

Keep one durable idea in view:

Web application architecture is the design of request flow, hosting responsibility, data access, protection, and operations around a user-facing workload.

Sections

  1. Web Application Architecture Mental Model

  2. Public Entry Points, Routing, and Edge Protection

  3. Managed Web Hosting with App Service and Container Apps

  4. Data Access, Private Endpoints, and Secrets

  5. Scaling, Deployment, Observability, and Cost

  6. Web Application Architecture Scenario

How the Chapter Develops

The chapter develops in this order:

  1. Start with the end-to-end request path and the responsibilities around a web workload.

  2. Explain how users reach the application through edge, gateway, routing, TLS, and WAF decisions.

  3. Compare managed web hosting choices for application code and APIs.

  4. Connect the web tier to data services through identity, secrets, private access, and network controls.

  5. Explain how scaling, availability, deployment, monitoring, and cost shape the operating model.

  6. Apply the model to a customer-facing web application with realistic security and operations constraints.

Together, these sections show that web application architecture is about the full operating path, not only where the web code runs.

What You Will Be Able to Do

By the end of this chapter, the reader should be able to:

  • Sketch a basic Azure web application architecture.

  • Explain the role of edge entry, routing, TLS, and WAF protection.

  • Choose between App Service and Container Apps for common web workloads at a high level.

  • Connect web workloads to data services using private access and secure secret handling.

  • Explain scaling, deployment, observability, availability, and cost trade-offs.

  • Describe a complete web application pattern in a conversation-ready way.

Key Ideas

  • A web architecture starts with request flow, not product names.

  • Edge and gateway choices influence routing, TLS, caching, WAF, resilience, and operations.

  • App Service and Container Apps can both host web workloads, but they fit different deployment and operating models.

  • Data access design includes identity, secrets, private endpoints, DNS, authorization, and monitoring.

  • Deployment slots, scaling rules, health checks, logs, alerts, and cost controls are part of the architecture.

  • The best web pattern is explainable from user request to data dependency to operations.

Related Provider-Neutral Reading