How to Live in a Post-Spring-Cloud-Netflix World by Olga Maciaszek-Sharma & Jakub Pilimon at SpringOne Tour 2019

1. © Copyright 2018 Pivotal Software, Inc. All rights Reserved. Version 1.0
Olga Maciaszek-Sharma, @olga_maciaszek
Jakub Pilimon, @JakubPilimon
Johannesburg, 09/04/2019
How to live in a
post-Spring-Cloud-Netflix world

2. Szczebrzeszyn
Chrząszczyżewoszyce

3. About Us
Olga Maciaszek-Sharma
(@olga_maciaszek)
Senior Software Engineer in Spring
Cloud team. Works mostly on:
● Spring Cloud Contract
● Spring Cloud Netflix
● Spring Cloud Gateway
● Spring Cloud OpenFeign
https://github.com/OlgaMaciaszek
Jakub Pilimon
(@JakubPilimon)
Developer Advocate, Trainer
● Domain-Driven Design
● Architecture
● Test-Driven Development
Blog: pillopl.github.io
https://github.com/ddd-by-examples

4. Spring + Netflix during Cloud-Native transition
Spring Cloud Netflix Eureka Client
Spring Cloud Netflix Eureka Server
Spring Cloud Netflix Archaius
Spring Cloud Netflix Ribbon
Spring Cloud Netflix Zuul
Spring Cloud Netflix Hystrix
Spring Cloud Netflix Hystrix Dashboard
Spring Cloud Netflix Turbine
Spring Cloud Netflix Hystrix Stream
Spring Cloud Netflix Turbine Stream

5. Netflix projects passed into maintenance or superseded
● Ribbon, 2016 -
https://github.com/Netflix/ribbon#project-status-on-maintenance
● Hystrix Dashboard → Atlas
● Zuul 1 → backward incompatible Zuul 2
● Archaius 1 → backward incompatible Archaius 2
● Hystrix, 2018 - https://github.com/Netflix/Hystrix#hystrix-status

6. Spring Cloud Netflix
Maintenance Mode
Greenwich RC1 announcement

7. Maintenance Mode
No new features
Fixes for blockers and security issues only
Considering and reviewing small PRs from the community

8. Spring + Netflix going into maintenance
Spring Cloud Netflix Eureka Client
Spring Cloud Netflix Eureka Server
Spring Cloud Netflix Archaius
Spring Cloud Netflix Ribbon
Spring Cloud Netflix Zuul
Spring Cloud Netflix Hystrix
Spring Cloud Netflix Hystrix Dashboard
Spring Cloud Netflix Turbine
Spring Cloud Netflix Hystrix Stream
Spring Cloud Netflix Turbine Stream

9. CardService
UserService
Proxy
FraudVerifier
Create
new user
Verify new user
Verify new card
Register
application
Create
new user

10. Demo
Old Stack
Card Application
Service
(Ribbon Load Balancer)
Zuul Proxy
(Hystrix, Hystrix
Dashboard)
User Service
(Hystrix, Hystrix
Dashboard)
Fraud
Verifier
Turbine App
Ignored
Service
Eureka
Service
Discovery

11. Spring Cloud New Stack
DEMO

12. Spring Cloud New Stack
Time to make the transition

13. Spring Cloud Netflix Ribbon → Spring Cloud Load Balancer
Currently `@LoadBalancerClietn` works with WebFlux only
Lacking implementations
Spring Cloud Netflix Ribbon still used in other
projects

14. Spring Cloud Netflix Zuul → Spring Cloud Gateway
Gateway: More than 20 Filters
As the infra is no longer blocking you, you can now move to reactive Web in your
services - but should you?
zuul:
● Non-reactive, Servlet-based
● Routing by serviceId by default
● Possibility to set up options via properties, including ignored
services, patterns and headers and ignoring sensitive headers
(true by default)
● Routes set in properties with limited config (id, serviceId,
path, url, stripPrefix, retrayable, sensitiveHeaders,
customSensitiveHeaders)
Gateway:
● Reactive, Netty-based
● Explicit route setup required
● Possibility to define routes both via properties and via functional

15. ● configuration
● Predicates and Filters
● All headers passed on by default

16. Spring Cloud Hystrix → SC CircuitBreaker + Resilience4J
SC Hystrix:
● Uses Hystrix underneath
● Possibility to use via @HystrixCommand annotation
● Possibility to pass fallback method in annotation
SC XCircuitBreaker:
● A Spring Cloud abstraction for circuit breakers
https://github.com/spring-cloud-incubator/spring-cloud-circuitbreak
er
● Currently supports Hystrix and Resilience4J
● Using via injected CircuitBreakerFactory bean and its
create() method
● Possibility to configure by setting up
Customizer<CircuitBreakerFactory> bean in a
@Configurationclass

17. Spring Cloud Netflix Turbine → Micrometer + Prometheus
Turbine:
● Aggregated Hystrix metrics from various applications via HTTP
● Via the Turbine Stream, managed to collect those via messaging
Micrometer + Prometheus:
● Micrometer - a metrics collection facade
● Its aim is to allow you to time, count, and gauge your code with a
vendor neutral API
● One of the monitoring systems to which you can output the metrics
is Prometheus

18. Spring Cloud Netflix Archaius → SC Config Server

19. Demo
New Stack
Card Application
Service
(SC
LoadBalancerClient,
Micrometer)
Gateway
Proxy
(CircuitBreaker,
Micrometer)
User Service
([Resilience4J],
Micrometer)
Fraud Service
(Micrometer)
Prometheus
Ignored
Service
[Eureka
Service
Discovery]
We might say that they can switch from Hystrix to Resilience4J, but since it's external,
we will probably not show it.
Eureka Discovery can now be switched to a different solution, but it’s not in
maintenance.

20. Spring Cloud New Stack
Should you make the change?
At least 1 year from Greenwich GA, then, even though the team has to do some work
to enable the transition, it will be deprecated, might happen even already for Hoxton.

21. Possible Issues

22. Check out master and old-stack branches
https://github.com/OlgaMaciaszek/spring-cloud-n
etflix-demo

23. Check out our projects

24. Transforming How The World Builds Software
© Copyright 2019 Pivotal Software, Inc. All rights Reserved.