When organizations embark on digital transformation, there are key things that will add value and shape to their journey - the ability to react fast to market conditions, innovate rapidly, and market quickly among others. To this end, a mircoservice architecture (MSA) will aid organizations by increasing their agility. This slide deck discusses the impact of microservices on an organization's overall IT strategy, focusing on the benefits of adopting an MSA as well as the challenges and how to address these.

1. Vice President - Engineering, WSO2
The Effects of Microservices on
Corporate IT Strategy
Selvaratnam Uthaiyashankar

2. Why Worry About Microservices?

3. • Software is eating the world - Marc Andreessen
• Software is a competitive advantage, not a cost center
• Needs agility in technology, process and people
– Cost of change
– Pace of change
– Quality of change
Digital Transformation

4. • Autonomous teams
• Agile development
• Continuous delivery
Trends in Software Development

5. Microservices
Consumers
API GW
Systems
Microservices

6. • Polyglot
• Independent scalability
• Resilience against failure
• Replaceability
• Composability
• Smaller experimentations and fail faster
Benefits of Microservices

7. How Will Microservices Affect Your
IT Strategy?

8. • Polyglot and heterogeneous technologies
together with autonomous teams
• Can easily become a “zoo” of
technologies
• License and security upgrades of
third-party components
• Governance and approval process
Selection of Technology
Image Source:
http://www.cartoonaday.com/images/cartoons/2014/01/Animals-africa
-dancing-cartoon-fun-CAD-598x476.jpg

9. • Loosely coupled, bounded context
• Team own all aspects (quality, security, compliance,
performance, etc.)
• Automation mindset
• Move fast, yet don’t break
Agile Development
Image Source:
https://monkeedo.files.wordpress.com/2008/01/monkey-tshirt.jpg

10. • Small teams (“two pizza team”)
• Interact with interfaces available
• Conway’s Law
• Don’t re-invent the wheel
Team Structure
Image Source: https://i.ytimg.com/vi/3Ctky8ZyfJU/hqdefault.jpg

11. • Impact analysis
• SLA due to failure of a component
• Identifying unused (and retirable)
services
• Debugging and testing
• Performance
Interdependencies of Services
Image Source:
https://i.pinimg.com/736x/da/86/04/da86047ff4edde35c
d79249d4f85661e--cartoon-monkey-cute-cartoon.jpg

12. • Independent scalability
• Don’t assume number of instances
• Re-distribute load for cost
optimization
• Reclaim unwanted resources -
Janitor monkey
• Data layer scalability
Scalability
Image Source: https://i.ytimg.com/vi/GO_LxMa1Lgo/maxresdefault.jpg

13. • Individual services health,
scalability
• Monitoring on integration points
• Monitoring of interdependencies
• Potential hotspots
• Message tracing
• Log analysis
Observability
Image Source:
http://uglymonkeyadventures.com/wp-content/uploads/2016/04/ugly
-monkey-magnifying-glass-pose-nologo.png

14. • Design for failure
• Test for failure - chaos monkey,
chaos gorilla
Resiliency
Image Source:
https://www.veracode.com/sites/default/files/styles/media_responsive_widest/pu
blic/SimianArmy.png?itok=ZtGspmhN

15. • Zero downtime migration - blue green deployments
• Try new experiments - canary deployment
Replaceability
Image Source:
https://s-media-cache-ak0.pinimg.com/originals/58/24/e9/5824e927842
966b8f7da094913151ede.jpg

16. • Transaction between the services
• Distributed transaction vs
compensation
• Eventual consistency
Transactions
Image Source:
https://previews.123rf.com/images/chudtsankov/chudtsankov1601/c
hudtsankov160100023/51065470-Greedy-Monkey-Cartoon-Charac
ter-Jumping-With-Cash-Money-and-Dollar-Eyes-Stock-Photo.jpg

17. • Dynamic services and discovery
• Fluid perimeter
• Authentication
• Intrusion detection
Security
Image Source:
http://cartoonstudio.co.uk/cartoonist-for-hire/wp-content/uploads/2012/06/Monkey.jpg

18. • Growth experiments
• Too many experiments and failures?
• Framework for experiments and
recordings
Experiments and Fail Fast
Image Source:
https://www.colourbox.com/preview/3255120-cartoon-characte
r-monkey-in-chemistry-class-isolated-on-white-background.jpg

19. • Complex than monolithic testing
• Test for failure
• End-to-end testing
• Performance and stress testing
Testing Methodology
Image Source:
https://www.guardicore.com/wp-content/uploads/2016/0
7/Infection-Monkey-Only-Logo.png

20. • Can’t break others due to change
• Need to have versioning
Versioning and Backward Compatibility

21. • Plan for CI/CD
• More details in Dakshitha’s session
CI/CD

22. How WSO2 Can Help
API Services/Edge
Services
Consumers
Composite
Services/Integration
Service
Core Services/ Atomic
Services

23. wso2.com