Microservices are definitively one of 2016 buzzwords. In this presentation I try to give an understandable definition and my pros/cons about this architectural pattern.

1. Say Microservices again!
 - March, 1st 2016@danielpetisme

2. Brace yourself, Microservices
are coming
microservices
Google Trends
Gartner Hype Cycle

3. Definition

4. You are developing monoliths
All the functionality into a single process.
Users, Products, Payments, Customers, etc. ?

5. Scaling the monolith
Let's replicate this almost not used functionality on all the
nodes.

7. Loosely coupled service oriented architecture
with bounded contexts.
What's a Microservice
In short, the microservice architectural style is an approach to
developing a single application as a suite of small services, each
running in its own process and communicating with lightweight
mechanisms, often an HTTP resource API.
These services are built around business capabilities and
independently deployable (...).
James Lewis & Martin Fowler
TL;DR

8. Scale the right functionality.
Scaling a Microservice

9. Haters gonna hate
Microservices in action:
cat /etc/passwd | grep "/bin/bash" | cut -d ":" -f 1 > users_using_bash
Unix - 1969

10. Pros

11. 1 Microservice, 1 product
Independance: Lifecyles, Data management, Technos

12. Cons

13. From an API call to a network call:
Complexity
You can move it about but it's still there!
Robert Annett: Where is the complexity?
Latency
Serialization
Fault tolerance

14. Enablers

15. Netflix and chill
(Circuit breaker), (Client-side load balancer),
(Service Discovery), (Declarative Rest Client)
Hystrix Ribbon
Eureka Feign

16. Conclusion

17. Be pragmatic
Seducing benefits.
Not a free lunch!
Evaluate the Tech. & Org. feasability.

18. Thank you
Happy Birthday !@clermontech

19. Credits
Images
Logo Clermont'ech
Pulp Fiction
Meme Generator
Microservices a definition of this new architectural term
Microservices Google Trend
Wikipedia Gartner Hype Cycle
Juri Strumpflohner - Notes: Microservices by Martin Fowler
Wikipedia Microservices
Spring Cloud Services for Pivotal Cloud Foundry
Simon Brown tweet
Normcoreplaty
Further readings
The dark side of microservices
The technical journey to microservices the new world
Ten Best Practices from Sequoia's Microservices Summit
Dockercon State of the Art in Microservices
Microservices not a free lunch
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