1.
Building Resilient
Microservices
Gurpreet S. Sachdeva
Aricent

2.
Who AM I?
• Java / Cloud Technology Enthusiast
• Director – Technology @ Aricent, Gurgaon
• Co-Founder Delhi/NCR JUG
• I blog @ www.thistechnologylife.com
• Java Code Geek partner
• @gssachdeva
• https://www.linkedin.com/in/gurpreets

3.
Microservices Evolution
https://www.morpheusdata.com/blog/2014-10-24-the-new-rea

4.
What Exactly is a Microservice
The term "Microservice Architecture" has sprung up over
the last few years to describe a particular way of designing
software applications as suites of independently
deployable services. While there is no precise definition of
this architectural style, there are certain common
characteristics around organization around business
capability, automated deployment, intelligence in the
endpoints, and decentralized control of languages and
data.
http://martinfowler.com/articles/microservices.html

5.
Microservice Properties

6.
Microservice Polyglot Architecture

7.
OPERATIONAL MATURITY IS VITAL
http://martinfowler.com/bliki/MicroservicePrereq
uisites.html
• Not all monoliths are bad applications

8.
Traditional Application Architecture
• Easy to
• Develop, Test, Deploy

9.
Scale Cube

10.
Y-Axis Scaling
• Apply X-axis and Z-axis scaling to each service
independently
• Partitioning Strategies
• Noun
• Verb
• SRP
• Unix Utilities

11.
Conway’s Law
“Organizations which design systems ... are constrained to
produce designs which are copies of the communication
structures of these organizations”
-Melvin Conway, 1968
Can your teams be organized around microservices

12.
Popular Examples
http://techblog.netflix.com
~ 600 services
http://highscalability.com/amazon-
architecture
100-150 services to build a page
http://www.addsimplicity.com/downlo
ads/eBaySDForum2006-11-29.pdf
http://queue.acm.org/detail.cfm?
id=1394128

13.
Monolith First
http://martinfowler.com/bliki/MonolithFirst.html

14.
Microservices – Inner & Outer
Architecture

15.
Microservices – Inner & Outer
Architecture

16.
Facets of Monitoring

17.
12 Factor App Principles

18.
Design for Failure
• Failure will ALWAYS occur
• Dependent services may be unavailable
or too slow to respond
• Horizontal clustering
• Resilience Patterns to the rescue
• CicuitBreaker, Bulkhead, Caching,
Timeout, Retry, Messaging, etc.

19.
Netflix OSS Projects
Over 100 NetflixOSS projects @ netflix.github.com

20.
Cloud Foundry to Rescue
• Many moving parts
• Orchestration => Cloud Foundry

21.
Data Strategy
• Multiple microservices NOT to share the same database
model and perform updates on it
• Separation of at least read/write access
• Ideally: Separate data stores for each service

22.
Inter-Service Communication
• In a monolith architecture, most of the communication is
synchronous
• Synchronous communication
• Mostly REST is used, Other choices: Protocol Buffers,
thrift
• May require asynchronous communication as well
• ZeroMQ, RabbitMQ, Kafka

23.
How to Test?
http://martinfowler.com/articles/microservice-testing

24.
Continuous Delivery
• Reliable Software Releases through Build,
Test and Deployment Automation
• DONE = Shippable into Production

25.
Continuous Integration Tool Set

26.
Prepare for DevOps
Devops (From Verticals to
collaborative teams)

27.
Spring Boot
• Opinionated Spring application architecture - Convention
over Configuration
• Production-ready features, externalized configuration,
metrics and health checks
• Spring Cloud – Umbrella project for cloud connectors, on
top of Spring Boot

28.
Take Aways
Microservices aren’t micro!
Everything comes at a price
No framework is a silver bullet

29.
THANK YOU