1. Building Serverless Enterprise Applications
Using AWS managed services to build web apps

2. Agenda Justification Application requirements
AWS serverless architecture
Frameworks and tooling
Gotchas
Questions

3. What’s the business case?
Know why you are building in the cloud before you start
Hint: It’s probably not to save money
Some ideas
Improve responsiveness to customer needs
Centralize and automate resource management
Document and version environment
Support cyclic or shifting usage patterns (match supply with demand)
Develop skillsets

4. AWS Application Models
Lift-and-shift
Take existing virtual machines and move them to cloud-hosted EC2 instances (rehost)
Quickest and cheapest, but fewest cloud advantages
Rearchitect
Rebuild application from the ground up using managed services
Most time consuming and expensive, but most cloud advantages

5. Requirements Basic CRUD operations Multi-user Scalable
Create, read, update, delete
Multi-user
Scalable
Secure (authentication and authorization)
Use managed resources
Align with AWS best practices

6. Annual Equipment Request App
Used to manage the Library’s annual purchase and prioritization cycle
20 users with varied roles and permissions
Create, list, update, delete records
Old, ready for rework
Big enough to be non trivial, small enough that we had a chance of success
Built with PHP (Laravel), jQuery, SQL Server

7. AWS Architecture

8. AWS Architecture – S3 Cloud document storage
Hosts static web resources
Can be configured to host public websites
HTML, CSS, JavaScript, images
Supports CNAME aliases
Supports .htaccess style configuration for URL rewrite and redirect
Supports SSL for custom domain names
Billed for storage and for transfer

9. AWS Architecture – API Gateway
Acts as the ‘front door’ to the application
Handles authorization and access control
Exposes Lambda functions to your front-end application code
Billed for API calls

10. AWS Architecture – Lambda
Run code without servers
Supports Node.js, Python, Java, C#, and Go.
Can use existing libraries
Upload functions, configure triggers
Works closely with API gateway via proxy integration
Business logic and data access code goes here
Billed for compute cycles (function run time)

11. AWS Architecture – DynamoDB
Document database in the cloud
Non-relational (NoSQL)
Fast and scalable
Built in security, backup, restore, caching
Billed for storage and for transfer

12. Supporting Cast
Auth0
CloudFormation
CloudWatch
Serverless.com

13. Serverless Framework The ‘glue’ 3rd party service
“A toolkit for deploying and operating serverless architectures”
Cloud infrastructure as code
Deployment tools
Environment configuration
Profiles
IAM Roles
CloudFormation

14. Demo

15. Gotchas CORS Lambda Proxy Integration response
Lambda Proxy Integration response
Client-side authentication
AWS Custom Authorizers and Auth0
JSON Web Tokens
Example code issues
Framework maturity

16. Links and Questions https://github.com/scottmetoyer/libapps-cloud