Book Image

Learning Azure Functions

By : Mitesh Soni, Manisha Yadav
Book Image

Learning Azure Functions

By: Mitesh Soni, Manisha Yadav

Overview of this book

Functions help you easily run small pieces of code in cloud with Azure functions without worrying about a whole application or the infrastructure to run it. With Azure functions, you can use triggers to execute your code and bindings to simplify the input and output of your code. This book will start with the basics of Azure Functions. You will learn the steps to set up the environment and the tools that we will be using in the further chapters. Once you have a better understanding of this, we will be creating our first hello world function app. Later you will be introduced to triggers, how they are used to activate a function, and how binding can be used to output results of a function.You will also explore the steps to create an assembly with complex functionality that can be used by functions. Next, this book will teach you to scale your functions and use them to process data, integrate systems, and build simple APIs and microservices. Finally, this book will cover some diagnostic techniques with Azure App services and best practices of working with Azure Functions. By the end of this book, you will be well-versed with the techniques of scaling your Azure functions and making the most of serverless architecture.
Table of Contents (17 chapters)
Title Page
About the Authors
About the Reviewers
Customer Feedback

Creating a JavaScript function triggered by a Webhook

Let's create a JavaScript function in Microsoft Azure using Azure Portal:

  1. Log in to the Azure portal and navigate to the function app, which we created in the previous chapter.
  2. Click on the + sign to add a new Azure Function. Set the language as Javascript and the template as Generic Webhook, as shown in the following screenshot:
  1. Now provide a name for the function and click on Create:
  1. A default template will be created, as shown in the following screenshot:
  1. Get the function URL and copy it. We will use it later in the chapter. Save it in a notepad:
  1. Now, we will create a Webhook endpoint in an activity log alert in Azure Monitor. Click on Monitor, as shown in the following screenshot:
  1. Now we need to create an alert. Click on Alerts and then on Add activity log alert:
  1. Provide the following details:
  1. Here's a description of the terms in the preceding screenshot:
    • * Activity log alert name: Name of the activity log alert.
    • * Subscription: Microsoft Azure...