Microservices architecture and communication

Omoloro Oyegoke spoke about Microservices architecture and communication on a forLoop Google Hangout conference.

Transcript

1. Microservices: Architecture and Communication By Omoloro Oyegoke
2. The story so far... • There was a monolith • It was split into a client application and a web service • The web service was split into several smaller services around business units • Each service was then split into microservices based on individual processes
3. E-Commerce Case Study
4. The Monolith superdupermall.com.ng
5. The Monolith superdupermall.com.ng Homepage Search Category List Product Information Cart Checkout User Account Web Pages
6. The Monolith superdupermall.com.ng Homepage Search Category List Product Information Cart Checkout User Account CMS Inventory Management Order Management Customer Management Web Pages
7. Client - Service superdupermall.com.ng Homepage Search Category List Product Information Cart Checkout User Account CMS Inventory Management Order Management Customer Management Web Pages
8. Client - Service superdupermall.com.ng Homepage Search Category List Product Information Cart Checkout User Account CMS Inventory Management Order Management Customer Management Web Pages Mobile Client
9. Client - Service superdupermall.com.ng Homepage Search Category List Product Information Cart Checkout User Account Web Pages Mobile Client api.superdupermall.com.ng
10. What’s really going on • Homepage ◦ CMS ◦ Recommendations ◦ Featured products ◦ Deals • Detail pages ◦ Basic info e.g. name, description, images, price ◦ Reviews ◦ Recommendations • Listing pages ◦ Recommendations ◦ Filters ◦ Products
11. What’s really going on • Account Pages / Customer Specific Information ◦ Order history ◦ Wishlist ◦ Cart ◦ Coupons • etc
12. Decomposing our service Product Service Ratings Service Cart Service Stock Service Order Service Customer Service Wishlist Service
13. Client - Service superdupermall.com.ng Homepage Search Category List Product Information Cart Checkout User Account Web Pages Mobile Client api.superdupermall.com.ng
14. Web browsers are used to this
15. But imagine what it means for a mobile phone
16. What does it mean for a mobile phone? • Each connection tries to negotiate a connection with a cell tower • Each packet has HTTP overhead increasing the size of data transferred • Mobile networks can be very unreliable and TCP will require lost packets to be resent… more data • Some responses may have more information than the client needs for that particular use case… even more data • Making that many requests isn’t friendly on the device’s battery life
17. Gateways • Drastically reduces the number of requests • Allows efficient handling of retries, circuit-breakers, and fallbacks • Facilitates proper caching strategies
18. User Service User service Request https://customers.superdupermall.com.ng/customers/123 Response { "user_id": "123", "first_name": "Omoloro", "last_name": "Oyegoke", "dob": "12-04-2001", "status": "active" }
19. User Service User service Request https://customers.superdupermall.com.ng/customers/124 Response { "user_id": "124", "first_name": "Isaac", "last_name": "Asimov", "dob": "02-01-1920", "status": "inactive" }
20. Wallet Service Request https://wallet.superdupermall.com.ng/customers/123 Response { "user_id": "124", "balance": 23004302, "fraud_risk": "low" }
21. Bringing it all together Request https://api.superdupermall.com.ng/customers/123 Response { "user_id": "12", "first_name": "Omoloro", "last_name": "Oyegoke", "balance": 23500000 }
22. Orchestration / Gateway Tools • Falcor • Zuul • GraphQL • Nginx (plus)
23. GraphQL Request https://api.superdupermall.com.ng/graphql?{(user_id:123){user{user_id, first_name,last_name},wallet{balance}} Response { "user_id": "123", "first_name": "Omoloro", "last_name": "Oyegoke", "balance": 23500000 }
24. Interservice Communication • Synchronous or Asynchronous? • Transactional or Not? • How secure?
25. Interservice Communication • REST • Events • Pub/Sub Systems
26. Who’s doing it? • Netflix • Thoughtworks • Uber • Amazon • Sound Cloud • Konga http://microservices.io/articles/whoisusingmicroservices.html