A simplified microservice architecture using Amazon Simple Queue Service to implement communication between microservices.

1. Introduction to
Microservices
❖ Leandro Parazito
❖ twitter.com/parazito
❖ co-organizer @ ruby.floripa.br
❖ software developer @ kmonline.com.br
❖ 23º RubyFloripa, 19 March 2019

2. Introduction to
Microservices
From Rails Monolith

3. The year is 2018*
- Rails 3.2.22
- MongoDB 2.6.9
- Available on 3 platforms:
- Web + iOS + Android
* Today: A code base under development for over two years

4. - Web interface
- API Integration
- APIs consumed by devices
- Financial reports and sync jobs
Application platform / Rails 3.2 / Ruby 2.2

5. Monolith
application
“Enterprise Applications are often built in
three main parts: a client-side user
interface (consisting of HTML pages and
javascript running in a browser on the user's
machine) a database (consisting of many
tables inserted into a common, and usually
relational, database management system),
and a server-side application.”
❏ James Lewis and Martin Fowler

6. Microservice application
★ A small and autonomous service
★ Deployment, testing, and monitoring
★ Distributed systems are hard

8. Who is using
microservices?
● Netflix
● Uber
● Amazon
● eBay
● Twitter
● Spotify
● Soundcloud

9. *

10. Monolith scenario

11. Monolith scenario

12. Monolith scenario

13. Monolith scenario

14. queue for asynchronous messaging
Messages are being published to SNS and enqueued to SQS specified
queue.

15. Report / service
❖ API
❖ Consume SQS
❖ Generate link
❖ Generate CSV
❖ Upload to S3
❖ Local datastore
❖ Send email (?)
❖ WebSocket (?)

17. Controller
Pseudo-code

18. Controller
Pseudo-code

19. Indiana Golang by Maria Ninfa
It’s time to change!

20. // worker.go

21. // worker.go

22. // worker.go

24. - Monitoring
- Auto scaling
- Dockerization
- Request tracing

25. - MonolithFirst
- Microservices
- The Majestic Monolith
- Architecting Rails Apps as Microservices
- Introduction to Microservices
- The Modular Monolith: Rails Architecture
- How to break a Monolith into Microservices
- Pattern: Messaging
- Message Queues
- Bounded Context

26. ●
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