An Introduction to Microservices

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Learn what Microservices are, what characterizes this architectural style and its most significant benefits and challenges

Software

An Introduction to
Microservices
URI GOLDSTEIN, MARCH 2017

2/23
Uri Goldstein
@urig
http://urig.io/
uri.goldstein@gmail.com

3/23
Agenda
History and Definitions
Major Characteristics
Strengths and Challenges
Further Investigation

4/23
A Bit of History
 Term coined in 2011
 Popular and gaining
popularity
 Evangelized by Netflix, AWS
 All the cool kids are doing it*
* Not really, no.

5/23
Definition
There Is No Band
Official Definition

Definitions
Netflix:
“Fine grained SOA”
The web:
“SOA Done Right”
@urig:
“SOA in the Cloud”
James Lewis & Martin Fowler, 2014:
“An Architectural Style”
 Must-read article
 9 Common Characteristics

Microservices are services
 Single Responsibility
 Easily upgraded
 Easily replaced
 1 Service = 1 Process
 Exclusive Ownership of
Data
 Polyglot Technology

9/23
Microservices are micro
 “Small enough to fit
in one’s head”
 Typically Tens to Tens of
Thousands LOC
 Owned by single
person / team

10/23
Products not Projects
“You build it, You run it”
DevOps Skills and Mentality
Evolutionary Design

11/23
Business drives architecture
Cross-functional teams
Organized around Business Capability
1 Service ≈ 1 Business Feature

12/23
Smart endpoints and dumb pipes
Microservices are
the Anti-ESB

13/23
Smart endpoints and dumb pipes
 More like WWW:
Logic resides in endpoints
Comm. layer is simple
Typically REST

14/23
Distributed Means Distributed
Designed for Failure
Stateless
Asynchronous

15/23
Benefits
Highly Scalable
Cost Effective*
Fast and Furious
Cloud Native

18/23
No Compiler Safety Net
Testing
Versioning
Backward Compatibility

19/23
Easy Deployment Isn’t Easy
DevOps
Automation
Continuous Delivery / Deployment

20/23
Network Latency and Reliability
Design for Failure
Redundancy
Monitoring
Automation

21/23
Take-Aways
 One size does not fit all
 Challenges are significant
 Do you have the skills to mitigate them?
 Are the benefits relevant for you?
 The Good News:
It’s not all or Nothing

22/23
Further reading
 Microservices Resource Guide
https://www.martinfowler.com/microservices/
 Microservices Article: Lewis, James & Fowler, Martin
https://martinfowler.com/articles/microservices.html
 Adrian Cockroft: Migrating to Microservices (video)
https://www.infoq.com/presentations/migration-cloud-native
 Loads more…

23/23
Thanks for listening – Question Time
uri.goldstein@gmail.com
GDG Rishon JetBrains give away!
http://tinyurl.com/GDGRL-March

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An Introduction to Microservices

1. An Introduction to Microservices URI GOLDSTEIN, MARCH 2017

2. 2/23 Uri Goldstein @urig http://urig.io/ uri.goldstein@gmail.com

3. 3/23 Agenda History and Definitions Major Characteristics Strengths and Challenges Further Investigation

4. 4/23 A Bit of History  Term coined in 2011  Popular and gaining popularity  Evangelized by Netflix, AWS  All the cool kids are doing it* * Not really, no.

5. 5/23 Definition There Is No Band Official Definition

6. Definitions Netflix: “Fine grained SOA” The web: “SOA Done Right” @urig: “SOA in the Cloud” James Lewis & Martin Fowler, 2014: “An Architectural Style”  Must-read article  9 Common Characteristics

7. 7/23 Ex: Monolith vs Microservices

8. Microservices are services  Single Responsibility  Easily upgraded  Easily replaced  1 Service = 1 Process  Exclusive Ownership of Data  Polyglot Technology

9. 9/23 Microservices are micro  “Small enough to fit in one’s head”  Typically Tens to Tens of Thousands LOC  Owned by single person / team

10. 10/23 Products not Projects “You build it, You run it” DevOps Skills and Mentality Evolutionary Design

11. 11/23 Business drives architecture Cross-functional teams Organized around Business Capability 1 Service ≈ 1 Business Feature

12. 12/23 Smart endpoints and dumb pipes Microservices are the Anti-ESB

13. 13/23 Smart endpoints and dumb pipes  More like WWW: Logic resides in endpoints Comm. layer is simple Typically REST

14. 14/23 Distributed Means Distributed Designed for Failure Stateless Asynchronous

15. 15/23 Benefits Highly Scalable Cost Effective* Fast and Furious Cloud Native

16. 16/23 Challenges

17. 17/23

18. 18/23 No Compiler Safety Net Testing Versioning Backward Compatibility

19. 19/23 Easy Deployment Isn’t Easy DevOps Automation Continuous Delivery / Deployment

20. 20/23 Network Latency and Reliability Design for Failure Redundancy Monitoring Automation

21. 21/23 Take-Aways  One size does not fit all  Challenges are significant  Do you have the skills to mitigate them?  Are the benefits relevant for you?  The Good News: It’s not all or Nothing

22. 22/23 Further reading  Microservices Resource Guide https://www.martinfowler.com/microservices/  Microservices Article: Lewis, James & Fowler, Martin https://martinfowler.com/articles/microservices.html  Adrian Cockroft: Migrating to Microservices (video) https://www.infoq.com/presentations/migration-cloud-native  Loads more…

23. 23/23 Thanks for listening – Question Time uri.goldstein@gmail.com GDG Rishon JetBrains give away! http://tinyurl.com/GDGRL-March

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