Microservices in Action

May 27, 2016Download as PPTX, PDF2 likes643 views

Microservice architecture is a new way of developing an application as a suite of independently deployable and manageable small services talking to each other using web services(REST) or a message broker(AMQP). While there is no precise definition and others consider microservices to be simply an ideal, refined form of SOA(Service-oriented architecture ), each microservice should be relatively small so that it's easier for a developer to understand, use suitable framework and IDE, deploy, scale, easily isolate fault.

Agenda
• Traditional/Monolith Architecture
• Get familiar with microservice architecture
• Challenges due to distributed nature
• Netflix and Spring Cloud project
• Build a microservice application
2

Traditional architecture cont.…
Simple to
 Develop
 Test
 Deploy
 Scale
But…
 Your IDE hangs
 Complex engogh for
new feature
 Adding new developer
to the team
 Frequent deployments
and the long running
jobs
 Framework stack
committment
 Modules not deployable
independently

What are microservices?
Microservices are a style of software
architecture that involves delivering
systems as a suite of very small, granular,
independent collaborating services.
7

What are microservices cont.…
Each microservice:
 Built around business capabilities
 Runs in its own process
 Collaborate with lightweight mechanisms e.g.
HTTP resource API, Messaging
8

Microservices characteristics
• Componentization via Services
• Organized around Business Capabilities
• Smart endpoints and dumb pipes
• Decentralized governance
• Decentralized data management
• Infrastructure Automation
9

Microservices Benefits
• Ease of development and maintenance
• Deployed independently of other services
• Truly scalable systems
• Fault isolation e.g. memory leak
• Polyglot mode of development e.g. Nodejs
for one service and C/C++ for other
10

Microservices challenges
• Distributed systems are harder to program,
since remote calls are slow and are always at
risk of failure
• Operational Complexity: You need a mature
operations team to manage lots of services,
which are being redeployed regularly
• Challenging to slice the app into services
11

Fallacies of Distributed
Computing
• Proved to be false in the long run
• The network is reliable
• Latency is zero
• Bandwidth is infinite
• The network is secure
• Topology doesn't change
• There is one administrator
• Transport cost is zero
• The network is homogeneous
12

Spring Cloud and Netflix OSS
Spring Cloud integrates the Netflix
components in the Spring environment in a
very nice way using auto configuration and
convention over configuration similar to
how Spring Boot works.
14

Let me know if you still have few questions unanswered.
bhagwat.kumar@tothenew.com
https://twitter.com/bhagwatkumar
http://www.tothenew.com/blog/author/bhagwat/

References
http://martinfowler.com/articles/microservices.html
http://projects.spring.io/spring-cloud/
http://www.infoworld.com/article/2925047/application-development/build-self-
healing-distributed-systems-with-spring-cloud.html
http://blog.arungupta.me/microservice-design-patterns/
https://gssachdeva.wordpress.com/2015/06/02/microservices-in-a-nutshell/
http://www.slideshare.net/SpringCentral/building-a-microservice-federation-with-
grails
https://spring.io/blog/2015/07/14/microservices-with-spring
http://callistaenterprise.se/blogg/teknik/2015/04/10/building-microservices-with-
spring-cloud-and-netflix-oss-part-1/
27

- Microservices architecture breaks applications into small, independent services that focus on specific tasks and communicate over well-defined interfaces. This improves scalability, flexibility and allows for independent development and deployment of services. - The architecture promotes separating concerns, with each small service handling a single "verb" of the application and teams owning service groups. Services are stateless and communicate asynchronously over lightweight protocols. - Automating deployment through containerization allows for easy rollout of new versions with zero downtime and elastic scaling of services based on demand. Monitoring provides visibility into technical and business metrics of the distributed system.

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Microservices in Action

1. Microservices in Action Bhagwat Kumar

2. Agenda • Traditional/Monolith Architecture • Get familiar with microservice architecture • Challenges due to distributed nature • Netflix and Spring Cloud project • Build a microservice application 2

3. Traditional architecture 3

4. Traditional architecture cont.… Simple to  Develop  Test  Deploy  Scale But…  Your IDE hangs  Complex engogh for new feature  Adding new developer to the team  Frequent deployments and the long running jobs  Framework stack committment  Modules not deployable independently

5. Decomposition

6. Decomposition cont.…

7. What are microservices? Microservices are a style of software architecture that involves delivering systems as a suite of very small, granular, independent collaborating services. 7

8. What are microservices cont.… Each microservice:  Built around business capabilities  Runs in its own process  Collaborate with lightweight mechanisms e.g. HTTP resource API, Messaging 8

9. Microservices characteristics • Componentization via Services • Organized around Business Capabilities • Smart endpoints and dumb pipes • Decentralized governance • Decentralized data management • Infrastructure Automation 9

10. Microservices Benefits • Ease of development and maintenance • Deployed independently of other services • Truly scalable systems • Fault isolation e.g. memory leak • Polyglot mode of development e.g. Nodejs for one service and C/C++ for other 10

11. Microservices challenges • Distributed systems are harder to program, since remote calls are slow and are always at risk of failure • Operational Complexity: You need a mature operations team to manage lots of services, which are being redeployed regularly • Challenging to slice the app into services 11

12. Fallacies of Distributed Computing • Proved to be false in the long run • The network is reliable • Latency is zero • Bandwidth is infinite • The network is secure • Topology doesn't change • There is one administrator • Transport cost is zero • The network is homogeneous 12

13. 13

14. Spring Cloud and Netflix OSS Spring Cloud integrates the Netflix components in the Spring environment in a very nice way using auto configuration and convention over configuration similar to how Spring Boot works. 14

15. Spring Cloud and Netflix OSS 15

16. Centralized configuration service 16

17. Centralized configuration service 17

18. Eureka Discovery Service 18

19. Eureka Discovery Service 19

20. Client Side Load balancer 20

21. Client Side load-balance: Ribbon 21

22. Client Side load-balance: Feign 22

23. Zuul API Gateway 23

24. Zuul API Gateway Cont... 24

26. Let me know if you still have few questions unanswered. [email protected] https://twitter.com/bhagwatkumar http://www.tothenew.com/blog/author/bhagwat/

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