MICROSERVICES:A JOURNEY OF AN ETERNAL IMPROVEMENT

Levi9 Meetup 04.2016

Anton Udovychenko

ABOUT ME

Software Architect @ Levi9

8+ years of Java experience

Passionate about agile methodology and clean code

http://ua.linkedin.com/in/antonudovychenko

http://www.slideshare.net/antonudovychenko

Amsterdam

Levi9 HQAmsterdam – 2005

25 people

Novi Sad

SerbiaNovi Sad – 2005

320+ people

Zrenjanin

SerbiaZrenjanin– 2014

30+ people

Iasi

RomaniaIasi – 200780+ people

Kiev

UkraineKiev – 2008130+ people

http://www.levi9.com/

AGENDA

• Monolith development

• Reflections about Scale cube

• Microservices to the rescue

• Spotify Scrum

• Employ Continuous delivery

• Q&A

MONOLITH DEVELOPMENT

• Widely known and described

• Simple development

• Straightforward testing

• Easy deployment

Benefits:

MONOLITH DEVELOPMENT

• Grows to be tightly coupled

• Difficult to make changes

• Obstacle for scaling

• Complex to analyze

• Frightens developers

• Hard to change technology stack

Disadvantages:

MONOLITH DEVELOPMENT

• Grows to be tightly coupled

• Difficult to make changes

•Obstacle for scaling

• Complex to analyze

• Frightens developers

• Hard to change technology stack

Disadvantages:

REFLECTIONS ABOUT SCALE CUBE

X axis – horizontal duplication

Scale by cloning

REFLECTIONS ABOUT SCALE CUBE

X axis – horizontal duplication

Scale by cloning

REFLECTIONS ABOUT SCALE CUBE

Y axis – functional

decomposition

Scale by splitting

different things

X axis – horizontal duplication

Scale by cloning

REFLECTIONS ABOUT SCALE CUBE

Y axis – functional

decomposition

Scale by splitting

different things

X axis – horizontal duplication

Scale by cloning

Near infinite scale

Starting point

MICROSERVICES TO THE RESCUE

MICROSERVICES TO THE RESCUE

MICROSERVICES TO THE RESCUE

Small autonomous services

that work together,

modelled around a business domain

MICROSERVICES TO THE RESCUE

MICROSERVICES TO THE RESCUE

• Scalability

• Independent deployments

• Polyglot services

• Easier to understand a service

• Decoupling

• Fast development

Benefits:

MICROSERVICES TO THE RESCUE

• Distribution performance

• Eventual consistency

• Network security

• Orchestration complexity

• Monitoring and testing

• Code duplication

Disadvantages:

CONWAY’S LAW

Organizations which design systems ... are constrained

to produce designs which are copies of the

communication structures of these organizations

Melvin Conway

SPOTIFY SCRUM

PO

Squad

SPOTIFY SCRUM

PO

Squad

PO

Squad

PO

Squad

PO

Squad

SPOTIFY SCRUMTribe

PO

Squad

PO

Squad

PO

Squad

PO

Squad

Lead

SPOTIFY SCRUMTribe

PO

Squad

PO

Squad

PO

Squad

PO

Squad

Lead

Tribe

PO

Squad

PO

Squad

PO

Squad

PO

Squad

Lead

Chapter

SPOTIFY SCRUMTribe

PO

Squad

PO

Squad

PO

Squad

PO

Squad

Lead

Tribe

PO

Squad

PO

Squad

PO

Squad

PO

Squad

Lead

Chapter

Chapter

SPOTIFY SCRUMTribe

PO

Squad

PO

Squad

PO

Squad

PO

Squad

Lead

Tribe

PO

Squad

PO

Squad

PO

Squad

PO

Squad

Lead

Chapter

Guild

CONTINUOUS INTEGRATION

Build

Deploy

Test

CONTINUOUS DELIVERY

Build

Deploy

TestManual

Acceptance

Release

CONTINUOUS DEPLOYMENT

Build

Deploy

Test

Release

EMPLOY CONTINUOUS DELIVERY

Version control

EMPLOY CONTINUOUS DELIVERY

Version control Continuous delivery

pipeline

EMPLOY CONTINUOUS DELIVERY

Version control Continuous delivery

pipeline

Services

v6

v37

v12

v5

EMPLOY CONTINUOUS DELIVERY

Version control Continuous delivery

pipeline

Services

v37

v12

v5

Code

changes

v7

EMPLOY CONTINUOUS DELIVERY - PIPELINE

BUILD TEST RELEASEFeatures:

• Pipeline as code

EMPLOY CONTINUOUS DELIVERY - PIPELINE

BUILD TEST RELEASEFeatures:

• Pipeline as code

• Auto build versioning

• Manual contracts versioning• Compile

• Version

• Unit test

• Static code

analysis

• Static security

code analysis

EMPLOY CONTINUOUS DELIVERY - PIPELINE

BUILD TEST RELEASEFeatures:

• Pipeline as code

• Auto build versioning

• Manual contracts versioning• Compile

• Version

• Unit test

• Static code

analysis

• Static security

code analysis

• e2e

• Performance

• Integration

• Penetration

• Contracts

EMPLOY CONTINUOUS DELIVERY - PIPELINE

BUILD TEST RELEASEFeatures:

• Pipeline as code

• Auto build versioning

• Manual contracts versioning• Compile

• Version

• Unit test

• Static code

analysis

• Static security

code analysis

• e2e

• Performance

• Integration

• Penetration

• Contracts

EMPLOY CONTINUOUS DELIVERY - PIPELINE

BUILD TEST RELEASEFeatures:

• Pipeline as code

• Auto build versioning

• Manual contracts versioning

• Immutable infrastructure

• Compile

• Version

• Unit test

• Static code

analysis

• Static security

code analysis

• e2e

• Performance

• Integration

• Penetration

• Contracts

Create

envRun tests

Dispose

env

EMPLOY CONTINUOUS DELIVERY - PIPELINE

BUILD TEST RELEASEFeatures:

• Pipeline as code

• Auto build versioning

• Manual contracts versioning

• Immutable infrastructure

• Compile

• Version

• Unit test

• Static code

analysis

• Static security

code analysis

• e2e

• Performance

• Integration

• Penetration

• Contracts

• Make available

downstream

• Trigger

integration build

Create

envRun tests

Dispose

env

EMPLOY CONTINUOUS DELIVERY

B T Rgit

B T Rgit

B T Rgit

B T Rgit

B T R+

53

6

36

11

5

Release

6

36

11

5

53

EMPLOY CONTINUOUS DELIVERY

B T Rgit

B T Rgit

B T Rgit

B T Rgit

B T R+

53

6

36

11

5

Release

6

36

11

5

53

37 37

EMPLOY CONTINUOUS DELIVERY

B T Rgit

B T Rgit

B T Rgit

B T Rgit

B T R+

53

6

36

11

5

Release

6

36

11

5

53

38 38

EMPLOY CONTINUOUS DELIVERY

B T Rgit

B T Rgit

B T Rgit

B T Rgit

B T R+

53

6

36

11

5

Release

6

36

11

5

53

38

12 12

EMPLOY CONTINUOUS DELIVERY

B T Rgit

B T Rgit

B T Rgit

B T Rgit

B T R+

53 54

6 6

36 36

11 12

5 5

Release

6

36

12

5

54

38

12

EMPLOY CONTINUOUS DELIVERY

B T Rgit

B T Rgit

B T Rgit

B T Rgit

B T R+

53 54

6 6

36 36

11 12

5 5

Release

6

36

12

5

54

3939

EMPLOY CONTINUOUS DELIVERY

B T Rgit

B T Rgit

B T Rgit

B T Rgit

B T R+

53 54 55

6 6 6

36 36 39

11 12 12

5 5 5

Release

6

39

12

5

55

39

EMPLOY CONTINUOUS DELIVERY

B T Rgit

B T Rgit

B T Rgit

B T Rgit

B T R+

Release

6

39

12

5

55

39

5555

5656

5757

585858

EMPLOY CONTINUOUS DELIVERY

git

git

git

git

+

Future proof:

• Any configuration of squads

• Growing number of components

EMPLOY CONTINUOUS DELIVERY

git

git

git

git

+

Future proof:

• Any configuration of squads

• Growing number of components

EMPLOY CONTINUOUS DELIVERY

git

git

git

git

+

Future proof:

• Any configuration of squads

• Growing number of components

git

TRY MICROSERVICES

http://jhipster.github.io

TRY CONTINUOUS DELIVERY

https://www.go.cd/

DEMO TIME

REFERENCES

http://martinfowler.com/articles/microservices.html

http://microservices.io/articles/scalecube.html

https://ucvox.files.wordpress.com/2012/11/113617905-scaling-agile-spotify-11.pdf

http://martinfowler.com/articles/microservice-testing

http://blog.arungupta.me/continuous-integration-delivery-deployment-maturity-model/

http://www.slideshare.net/PavelChunyayev/continuous-delivery-for-cxp-at-backbase-presented-at-arch9-amsterdam-30032016-levi9

THANK YOU!