AWS Serverless Building Blocks for Microservices

Over the past decade, serverless technologies have evolved tremendously. Today, any software running in the cloud, uses serverless functions, at least for DevOps operations.

But what are the use cases for serverless beyond DevOps?
Can we use serverless to build Microservices?
What are the AWS offerings for serverless and what makes them so unique?

This presentation addresses these questions which I have presented in the inaugural serverless user group event happened in Sri Lanka.

Transcript

1. Slide 1 AWS Serverless Building Blocks for Microservices What makes them so Unique Ashan Fernando
2. Slide 2 Simple serverless web application Let’s use the following technology stack • Single Page Application Frontend (e.g; Angular/React) • Backend with NodeJS • Database NoSQL (e.g; Amazon DynamoDB) • Identity Provider supporting OpenIDConnect/OAuth2 (e.g; AWS Cognito)
3. Slide 3 Using AWS serverless stack
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9. Slide 9 What about the interactions? • Dealing with interactions between Microservices is harder than you think. • Interactions only using the Microservices API won't be enough.
10. Slide 10 Let's take an example • Microservice 1 has a User Table in its Database, which keeps Users in the application. • Microservice 2 has an Employee Table which stores data related to Employees. • If someone changes the email in Microservice 1, this might need to reflect in Microservice 2.
11. Slide 11 Option 1 Can't we simply call both Services from Frontend Client, one after the other?
12. Slide 12 Option 2 Can't we call the Microservice 2 from Microservice 1?
13. Slide 13 Async Messaging with Pub-Sub using AWS SNS
14. Slide 14 What if the changes are complex and transactional?
15. Slide 15 SAGA's to rescue using AWS Step Functions • Distributed transactions are expensive. • SAGA pattern to rescue. • Local Transactions inside Microservices. • Connected with SAGAs. • Need to rollback • You can use AWS Step Functions to implement SAGAs.
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17. Slide 17 What makes AWS serverless services unique? • These are actual building blocks. • Possible to connect with each other easily. • Truly Serverless Services. • Consumption based costs.
18. Slide 18 Any Questions?
19. Thank You! www.99xtechnology.com Slide 19