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Learning Azure Functions

You're reading from  Learning Azure Functions

Product type Book
Published in Sep 2017
Publisher Packt
ISBN-13 9781787122932
Pages 240 pages
Edition 1st Edition
Languages
Concepts

Table of Contents (17) Chapters

Title Page
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Dedication
Preface
1. Introducing Microsoft Azure Services and Functions 2. First Function App - Anatomy and Structure of a Function App 3. Application of Triggers 4. Bindings 5. Webhooks for Azure Functions 6. The Real World - Functions to Build Consumable APIs 7. Managing and Deploying your Code 8. Business Considerations 9. Working with Different Languages

Azure Services versus AzureFunctions versus AWS Lambda

Let's try to compare Azure App Services, Azure Functions, and AWS Lambda. The following table may not contain all the points:

Azure App Services

Azure Functions

AWS Lambda

Category

Platform as a Service.

Allows you to develop serverless applications on Microsoft Azure.

Allows you to develop serverless applications on AWS.

Definition

Microsoft Azure App Service is a PaaS offering. We can create web and mobile apps for any platform or device.

Azure Functions is a service provided by Microsoft to run small pieces of code, or functions, in the Microsoft Azure cloud. We only need to focus on the problem and not the resources required for the solution.

AWS Lambda allows us to execute code in serverless architecture, where the resources are managed by AWS.

Vendor

Microsoft Azure.

Microsoft Azure.

Amazon/AWS.

Available from

2015.

2016.

2014.

Languages Supported

ASP.NET, Node.js, Java, PHP, and Python.

C#, F#, Node.js, Python, PHP, batch, bash, or any executable.

Node.js (JavaScript), Python, Java (Java 8 compatible), and C# (.NET Core).

Integrated development environment support

Yes (Microsoft Visual Studio IDE).

Yes (Visual Studio).

Yes (Eclipse IDE and Visual Studio IDE).

Environment variables support

Yes, in Application Settings.

Yes.

Yes.

Cost

App Service plan can be hosted are FREE (try for free), SHARED (host basic apps), BASIC (more features for Dev / Test), STANDARD (go live with web and mobile), and PREMIUM (enterprise scale and integration).

For more details go to https://azure.microsoft.com/en-in/pricing/details/app-service/.

Consumption plan means that when we execute functions, Microsoft Azure provides all the resources. We don't need to worry about resource management, and we only pay for the time that our function runs.

For more details go to https://azure.microsoft.com/en-in/pricing/details/functions/.

The Lambda free tier includes 1M free requests per month and 400,000 GB-seconds of compute time per month.

The first 1 million requests per month are free and $0.20 per 1 million requests thereafter ($0.0000002 per request).

For more details go to https://aws.amazon.com/lambda/pricing/.

Eligible for free tier

Yes.

Yes.

Yes.

Flexibility in configuration of resources

Yes.

Limited. (If App Service plan is used then configuration of resources is available.)

No (need to verify).

Execution time

N/A.

Azure Function must complete execution within 300 seconds.

AWS Lambda function must complete execution within 300 seconds.

Limit to the number of functions that can be executed

N/A.

No.

No.

Concurrent executions

N/A.

No limit.

By default, AWS Lambda limits the total concurrent executions across all functions within a given region to 1000.

Scalability

Manual and automatic scaling available in the form of an App Service plan.

Manual and automatic scaling has two plans available for costing; a Consumption plan and an App Service plan. For more details, check the Cost section in this comparison table.

Automatic scaling.

Monitoring

Azure App Insights / Azure App Service Default Monitoring.

N/A

Amazon CloudWatch console or AWS Lambda console.

Templates

Web

Web + SQL

Web Apps

Mobile Apps

Logic Apps

Media services

Blogs + CMSs

Starter web apps

Web app frameworks

Ecommerce

Add-ons

BlobTrigger

EventHubTrigger

Generic Webhook

GitHub Webhook

HTTPTrigger

QueueTrigger

ServiceBusQueueTrigger

ServiceBusTopicTrigger

TimerTrigger

Blank function

kinesis-firehose-syslog-to-json

alexa-skill-kit-sdk-factskill

batch-get-job-python27

kinesis-firehose-apachelog-to-json

cloudfront-modify-response-heade

s3-get-object-python

config-rule-change-triggered

lex-book-trip-python

Supported event sources /integrations

N/A.

Azure Cosmos DB

Azure Event Hubs

Azure Mobile Apps (tables)

Azure Notification Hubs

Azure Service Bus (queues and topics)

Azure Storage (blob, queues, and tables)

GitHub (Webhooks)

On-premises (using Service Bus)

Twilio (SMS messages)

Amazon S3

Amazon DynamoDB

Amazon Kinesis Streams

Amazon Simple Notification Service

Amazon Simple Email Service

Amazon Cognito

AWS CloudFormation

Amazon CloudWatch Logs

Amazon CloudWatch Events

AWS CodeCommit

Scheduled Events (powered by Amazon CloudWatch Events)

AWS Config

Amazon Alexa

Amazon Lex

Amazon API Gateway

Other Event Sources: Invoking a Lambda Function On Demand

Sample Events Published by Event Sources

URL

https://azure.microsoft.com/en-us/services/app-service/

https://azure.microsoft.com/en-us/services/functions/

https://aws.amazon.com/lambda/

Documentation

https://docs.microsoft.com/en-us/azure/app-service/

https://docs.microsoft.com/en-us/azure/azure-functions/

>https://aws.amazon.com/documentation/lambda/

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