Book Image

Azure Serverless Computing Cookbook - Third Edition

By : Praveen Kumar Sreeram
Book Image

Azure Serverless Computing Cookbook - Third Edition

By: Praveen Kumar Sreeram

Overview of this book

This third edition of Azure Serverless Computing Cookbook guides you through the development of a basic back-end web API that performs simple operations, helping you understand how to persist data in Azure Storage services. You'll cover the integration of Azure Functions with other cloud services, such as notifications (SendGrid and Twilio), Cognitive Services (computer vision), and Logic Apps, to build simple workflow-based applications. With the help of this book, you'll be able to leverage Visual Studio tools to develop, build, test, and deploy Azure functions quickly. It also covers a variety of tools and methods for testing the functionality of Azure functions locally in the developer's workstation and in the cloud environment. Once you're familiar with the core features, you'll explore advanced concepts such as durable functions, starting with a "hello world" example, and learn about the scalable bulk upload use case, which uses durable function patterns, function chaining, and fan-out/fan-in. By the end of this Azure book, you'll have gained the knowledge and practical experience needed to be able to create and deploy Azure applications on serverless architectures efficiently.
Table of Contents (14 chapters)
13
Index

Monitoring Azure Functions

Monitoring Azure Functions is important if you want to know whether there are any errors that are raised by the application during testing.

In this recipe, you will learn how to view the logs that are written to Application Insights by Azure Functions' code. As a developer, this knowledge can help troubleshoot any exceptions that may occur during application development.

Let's make a small change to the HTTP trigger function and then run it a few times with the test data.

How to do it…

In this recipe, we'll learn how to review the application traces using Application Insight's Logs. Let's perform the following steps:

  1. Navigate to the HTTP trigger that we created and replace the following code. I have moved the line of code that logs the information to the Logs console and added the name parameter at the end of the method:
    public static async Task<IActionResult> Run(HttpRequest req, ILogger log)
     ...