Book Image

Hands-On Serverless Computing

By : Kuldeep Chowhan
Book Image

Hands-On Serverless Computing

By: Kuldeep Chowhan

Overview of this book

Serverless applications and architectures are gaining momentum and are increasingly being used by companies of all sizes. Serverless software takes care of many problems that developers face when running systems and servers, such as fault tolerance, centralized logging, horizontal scalability, and deployments. You will learn how to harness serverless technology to rapidly reduce production time and minimize your costs, while still having the freedom to customize your code, without hindering functionality. Upon finishing the book, you will have the knowledge and resources to build your own serverless application hosted in AWS, Microsoft Azure, or Google Cloud Platform, and will have experienced the benefits of event-driven technology for yourself. This hands-on guide dives into the basis of serverless architectures and how to build them using Node.js as a programming language, Visual Studio Code for code editing, and Postman for quickly and securely developing applications without the hassle of configuring and maintaining infrastructure on three public cloud platforms.

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Table of Contents (16 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
Free Chapter
1
What is Serverless Computing?
What is Serverless Computing?
What is serverless computing?
What is FaaS?
The benefits of serverless computing
What serverless computing is not
Limits to serverless computing
Summary
2
Development Environment, Tools, and SDKs
Development Environment, Tools, and SDKs
Development environment and tools
Visual Studio Code
Node.js
Postman
SDKs
Summary
3
Getting Started with AWS Lambda
Getting Started with AWS Lambda
What is AWS Lambda?
AWS Lambda Function–Hello World
Configuring options for AWS Lambda
Securing AWS Lambda using IAM
Summary
4
Triggers and Events for AWS Lambda
Triggers and Events for AWS Lambda
Triggers for AWS Lambda
Summary
5
Your First Serverless Application on AWS
Your First Serverless Application on AWS
Technical requirements
Your first serverless app (using the AWS Console)
Your first serverless app (using the AWS SAM)
Summary
6
Serverless Orchestration on AWS
Serverless Orchestration on AWS
What is AWS Step Functions?
Summary
7
Getting Started with Azure Functions
Getting Started with Azure Functions
An introduction to Azure Functions
Azure portal
Configuring Azure Functions
Summary
8
Triggers and Bindings for Azure Functions
Triggers and Bindings for Azure Functions
Azure Function triggers and bindings
Azure services–triggers and bindings
Azure Cosmos DB
Azure Event Grid
HTTP and webhook bindings
Timer trigger
Summary
9
Your First Serverless Application on Azure
Your First Serverless Application on Azure
Technical requirements
Your first serverless app (using the Azure portal)
Your first Serverless app (using Azure Functions Core Tools)
Summary
10
Getting Started with Google Cloud Functions
Getting Started with Google Cloud Functions
Google Cloud Serverless Platform
Google Cloud Console
Configuring Google Cloud Functions
Summary
11
Triggers and Events for Google Cloud Functions
Triggers and Events for Google Cloud Functions
Technical requirements
Events
Triggers
Summary
12
Your First Serverless Application on Google Cloud
Your First Serverless Application on Google Cloud
Technical requirements
Your first serverless app (using the Google Cloud Console)
Your first serverless app (on a local workstation)
Summary
13
Reference Architecture for a Web App
Reference Architecture for a Web App
Technical requirements
Reference architecture
Hotel search
Add to cart
Summary
14
Reference Architecture for a Real-time File Processing
Reference Architecture for a Real-time File Processing
Technical requirements
Reference architecture
Photo processing application
Summary
15
Other Books You May Enjoy
Other Books You May Enjoy
Leave a review - let other readers know what you think

Photo processing application

The three AWS services that we just learned about will make up our serverless app for photo processing. To recap, the three AWS services are:

  • Amazon S3
  • Amazon SNS
  • AWS Lambda functions

The reference architecture for the photo processing application is shown next. Let me break down what is going on here:

  1. The user uploads a photo to an S3 bucket
  2. The upload of the photo to the S3 bucket could happen in multiple ways:
    • AWS S3 Console
    • Application that acts as a layer in front of S3
    • AWS CLI
  3. However, the files get uploaded to the S3 bucket, due to the configuration that we have on the S3 bucket, and a notification is sent to Amazon SNS as soon as a file gets created in the S3 bucket
  4. The notification is sent to an SNS topic that has three subscribers:
    • A Lambda function that creates thumbnails for the photo that was uploaded
    • A Lambda function that creates...
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