Developing Resilient Cloud Native Apps with Spring Cloud

•

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Distributed and massively scalable systems are difficult to design, implement, and operate. Further, microservice architectures are supposed to enable your business to be disruptive and innovative. Thankfully, two communities have emerged to facilitate easier solutions for these concerns and do a lot of the work for you: Spring Cloud OSS and Cloud Foundry. In this talk, we will take a deeper look at preventing cascading failures using Hystrix, as well as illustrate a mechanism for A/B testing using Eureka and blue-green deployments on Cloud Foundry.

TECHNOLOGY SOLUTIONS DELIVERED
Developing Resilient Cloud Native
Apps with Spring Cloud
Dallas Cloud Foundry Meetup
Sept 28, 2015
Dustin Ruehle (@DustinRuehle)

What are we covering today?
•What does it mean to be resilient?
•Spring Cloud Origins
•Why Spring Cloud?
•A/B Testing using Eureka and CF
•Using Hystrix to Fail Gracefully

Why Spring Cloud?
Microservice architectures are complex!
• They need to have their config stored in the environment, not in code
• Microservices are loosely coupled – They need to discover and be discoverable
• They are not necessarily colocated – Inter-service communication needs to be fault-tolerant
Netflix is a microservice architecture …
“they (probably) didn't build all this just because they were bored”
@joshghiloni

The “business” problem
“Cool new
way” service
Users of
“Old way”
Users of “cool
new way”
My Landing
Page
“Old way”
service
19% conversion
79% conversion
J
L

How to solve the “business” problem?
“Cool new
way” service
“Old way”
serviceEureka Server
Service
Registry
My Landing
Page
1
1
2
2
3
3
Register
Discover
Connect
Go
Routers
“Old way”
service
“Cool new
way” service
1
2
3
1
Existing app -
myservice.foo.com
2
New app -
myservice-B.foo.com
3
Map route -
myservice.foo.com

Runtime Service Discovery with Eureka
•Register and discover
services at runtime
•Registrations stored in
memory
•Simple dashboard available
•Spring Boot autoconfiguration
for self-registration
•Can be used to look up
external config servers
automatically
@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {
public static void main(String[] args) {
SpringApplication.run(
EurekaServerApplication.class,
args
);
}
}

A/B Testing Demo – What am I looking at?
Pivotal Web Services: cf-dal-meetup space
0
1
Eureka
Server
Circuit Breaker
Config Server
cloud-demo-service-a
cloud-demo-ui

Using Hystrixto Fail Gracefully
source: http://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html

Using Hystrixto Fail Gracefully
source: http://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html
CloudDemoUiApplication.java

Using Hystrixto Fail Gracefully
source: http://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html
CloudDemoUiApplication.java
UIController.java

Hystrix Demo – What am I looking at?
Pivotal Web Services: cf-dal-meetup space
0
1
Eureka
Server
Circuit Breaker
Config Server
cloud-demo-service-a
cloud-demo-service-b
cloud-demo-ui

References
Twelve Factor Apps: http://12factor.net
Microservice Prereqs: http://martinfowler.com/bliki/MicroservicePrerequisites.html
Spring Boot: http://projects.spring.io/spring-boot/
Spring Cloud: http://projects.spring.io/spring-cloud/
Netflix OSS: http://netflix.github.io/
Blog: http://www.ecsteam.com/ab-testing-using-spring-clouds-eureka-and-blue-green-
deployments-in-cloud-foundry
Source for this Demo: https://github.com/ECSTeam/spring-cloud-demo
Ted Talk: http://www.lifehack.org/294043/the-most-funny-ted-talk-ever-teach-you-how-
sound-smart?n=1&ref=tp

Thank You!
Special Thanks to Josh Ghiloni (@joshghiloni) for his cool demo code

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1. TECHNOLOGY SOLUTIONS DELIVERED Developing Resilient Cloud Native Apps with Spring Cloud Dallas Cloud Foundry Meetup Sept 28, 2015 Dustin Ruehle (@DustinRuehle)

2. What are we covering today? •What does it mean to be resilient? •Spring Cloud Origins •Why Spring Cloud? •A/B Testing using Eureka and CF •Using Hystrix to Fail Gracefully

3. What is resilience?

4. What is resilience?

5. Spring Cloud Origins

6. Spring Cloud Origins

7. Why Spring Cloud? Microservice architectures are complex! • They need to have their config stored in the environment, not in code • Microservices are loosely coupled – They need to discover and be discoverable • They are not necessarily colocated – Inter-service communication needs to be fault-tolerant Netflix is a microservice architecture … “they (probably) didn't build all this just because they were bored” @joshghiloni

8. The “business” problem “Cool new way” service Users of “Old way” Users of “cool new way” My Landing Page “Old way” service 19% conversion 79% conversion J L

9. How to solve the “business” problem? “Cool new way” service “Old way” serviceEureka Server Service Registry My Landing Page 1 1 2 2 3 3 Register Discover Connect Go Routers “Old way” service “Cool new way” service 1 2 3 1 Existing app - myservice.foo.com 2 New app - myservice-B.foo.com 3 Map route - myservice.foo.com

10. How to solve the “business” problem? “Cool new way” service “Old way” serviceEureka Server Service Registry My Landing Page 1 1 2 2 3 3 Register Discover Connect Go Routers “Old way” service “Cool new way” service 1 2 3 1 Existing app - myservice.foo.com 2 New app - myservice-B.foo.com 3 Map route - myservice.foo.com application.yml

11. Runtime Service Discovery with Eureka •Register and discover services at runtime •Registrations stored in memory •Simple dashboard available •Spring Boot autoconfiguration for self-registration •Can be used to look up external config servers automatically @SpringBootApplication @EnableEurekaServer public class EurekaServerApplication { public static void main(String[] args) { SpringApplication.run( EurekaServerApplication.class, args ); } }

12. A/B Testing Demo – What am I looking at? Pivotal Web Services: cf-dal-meetup space 0 1 Eureka Server Circuit Breaker Config Server cloud-demo-service-a cloud-demo-ui

13. A/B Testing Demo – What am I looking at? Pivotal Web Services: cf-dal-meetup space 0 1 Eureka Server Circuit Breaker Config Server cloud-demo-service-a cloud-demo-service-b cloud-demo-ui cf push cf map-route

14. Using Hystrixto Fail Gracefully source: http://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html

15. Using Hystrixto Fail Gracefully source: http://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html

16. Using Hystrixto Fail Gracefully source: http://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html CloudDemoUiApplication.java

17. Using Hystrixto Fail Gracefully source: http://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html CloudDemoUiApplication.java UIController.java

18. Hystrix Demo – What am I looking at? Pivotal Web Services: cf-dal-meetup space 0 1 Eureka Server Circuit Breaker Config Server cloud-demo-service-a cloud-demo-service-b cloud-demo-ui

19. Hystrix Demo – What am I looking at? Pivotal Web Services: cf-dal-meetup space 0 1 Eureka Server Circuit Breaker Config Server cloud-demo-service-a cloud-demo-service-b cloud-demo-ui cf delete -r

20. Hystrix Demo – What am I looking at? Pivotal Web Services: cf-dal-meetup space 0 1 Eureka Server Circuit Breaker Config Server cloud-demo-service-a cloud-demo-service-b cloud-demo-ui cf delete -r

21. Questions?

22. References Twelve Factor Apps: http://12factor.net Microservice Prereqs: http://martinfowler.com/bliki/MicroservicePrerequisites.html Spring Boot: http://projects.spring.io/spring-boot/ Spring Cloud: http://projects.spring.io/spring-cloud/ Netflix OSS: http://netflix.github.io/ Blog: http://www.ecsteam.com/ab-testing-using-spring-clouds-eureka-and-blue-green- deployments-in-cloud-foundry Source for this Demo: https://github.com/ECSTeam/spring-cloud-demo Ted Talk: http://www.lifehack.org/294043/the-most-funny-ted-talk-ever-teach-you-how- sound-smart?n=1&ref=tp

23. Thank You! Special Thanks to Josh Ghiloni (@joshghiloni) for his cool demo code

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