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Learning Azure Functions

By : Manisha Yadav, Mitesh Soni

3 (3)

Buy this Book

Learning Azure Functions

3 (3)

By: Manisha Yadav, Mitesh Soni

Buy this Book

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.

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

Introducing Microsoft Azure Services and Functions

An overview of serverless architectures

Why Azure Functions?

An overview of Microsoft Azure Services

Azure Services versus AzureFunctions versus AWS Lambda

Summary

First Function App - Anatomy and Structure of a Function App

Anatomy of Azure Functions

Setting up a basic Azure Function

Summary

Application of Triggers

Common types of triggers

Example of creating a simple scheduled trigger

HTTP trigger

Event hubs

Service bus

Summary

Bindings

Available input and output bindings

Types of Event Hubs

Storage

Summary

Webhooks for Azure Functions

Creating a JavaScript function triggered by a Webhook

Using a Webhook with an Azure Function

Using an event with an Azure Function

Summary

The Real World - Functions to Build Consumable APIs

Outlining a project

Architecting the solution

Building the project

Using storage

Test

Summary

Managing and Deploying your Code

Projects in VSTS

Continuous Integration

Continuous Delivery

Summary

Business Considerations

Monitoring of Azure Functions

Integration of Application Insights and Azure Functions

Pricing/hosting plans

Best practices

Summary

Working with Different Languages

The Python Function App

The PHP Function App

Summary

Customer Reviews

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Example of creating a simple scheduled trigger

Consider a simple example where we have to display a "good morning" message on screen every day in the morning at 8 AM. This situation is related to time so we need to use a schedule trigger. This is the type of trigger we will look at later in this chapter. Let's start creating a function with the schedule trigger first:

Click on the top left + icon | Compute | Function App:

Once we click on Function App, the next screen will appear, where we have to provide a unique function App name, Subscription, Resource Group, Hosting Plan, Location, Storage, and then click on the Create button:

Once we click on the Create button, Azure will start to deploy this function. Once this function is deployed, it will be seen in Notifications, as shown in the following screenshot: