1.
Serverless API with
Azure Functions
Analben Mehta
14+ years of experience in designing and developing enterprise applications
https://aanuwizard.com
@aanuwizard

2.
Agenda
1. What is Serverless?
2. Azure Functions – Intro
3. Demo – Hello World
4. Tooling options, test and deploy
5. Demo – Real-time app
6. Azure functions Proxies
7. Demo -Proxies
8. Securing azure functions
9. Serverless Mindset

3.
What is Serverless?

4.
Benefits of Serverless

5.
Evolution of Application

6.
Evolution of Application

7.
Azure Functions
Serverless code – triggered by events and bindings

8.
Functions - Programming Model

9.
Functions - Programming Model

10.
Supported Bindings
Type Service Trigger Input Output
Timer/Schedule Azure Functions ✔
HTTP (REST or WebHook) Azure Functions ✔ ✔
Blob Storage Azure Storage ✔ ✔ ✔
Queues Azure Storage ✔ ✔
Tables Azure Storage ✔ ✔
NoSQL DB Azure CosmosDB ✔ ✔ ✔
Streams Azure Event Hubs ✔ ✔
Push Notifications Azure Notification Hubs ✔
Bot Framework(Preview) Azure Bot Service ✔
Twilio SMS Text Twilio ✔
SendGrid E-Mail SendGrid ✔
Excel Tables Microsoft Graph ✔ ✔
OneDrive Files Microsoft Graph ✔ ✔
Outlook E-Mail Microsoft Graph ✔
Microsoft Graph Events Microsoft Graph ✔ ✔ ✔
Auth Tokens Microsoft Graph ✔
(* The HTTP output binding requires an HTTP trigger.)

11.
Supported Languages
 Languages:
 JavaScript, C#, F#
scripting options such as Python, PHP, Bash, Batch,
and PowerShell
 Experimental support
 .NET Core
 Linux Containers
 Java

12.
Demo: Azure Function
Demo – Getting Started

13.
Functions pricing
 Regular App Service plan
 Consumption Plan
Meter Price Free Grant (Per Month)
Execution time* £0.000012/GB-s 400,000 GB-s
Total executions*
£0.15 per million
executions
1 million executions

14.
Azure Functions – Develop your way
 Code directly in Azure portal
 Code in Visual Studio 2017 15.5 or later
Install “Azure Development” workload
Includes tooling to create Azure Function projects and
classes locally and publish
Includes Azure CLI (Command Line Interface) which
allow you to run and debug your functional locally.
Azure Functions extension for Visual Studio Code

15.
Azure Functions – Develop your way

16.
Demo: Booking application – unit
test, pre-compile and deploy

17.
Why choose pre-compiled functions?
Develop, debug and test locally
Better performance when starting cold.

18.
Azure Functions Proxy
Light weight API management
Have multiple function apps under a single API
surface.
Mock APIs for developers!
Request/Response override
Cheaper (pay per use)

19.
Azure Functions – Proxy

20.
Azure Functions – Proxy

21.
Demo: Azure Function Proxy –
Override Response

22.
Demo: Azure Function Proxy
Serving static content

23.
Securing Azure Functions
Use functions key
Use in-built authentication with Azure active
directory and other identity service provider
like Microsoft login, Gmail login etc.
Use custom identity provider
Create IP based rules in API gateway
Use function proxy to override request

24.
Serverless Mindset
Don’t overdo it
It may not be the right choice for all
applications
Find the piece of functionality that you can
isolate, reuse which need high scalability, fast
development
mock api to support frontend development
Make your function simple, stateless and
focus on 1 thing per function.

25.
#EdinburghAzureUserGroup
@aanuwizard