How to live in a post-Spring-Cloud-Netflix world - Spring I/O 2019

Zuul? Gateway? Should we get rid of Ribbon? What is going on with Hystrix? If you have ever faced those questions, come and listen to this talk. In December 2018, Netflix decided to move a number of their popular OSS projects, like Hystrix and Ribbon into maintenance mode and to make newer, backward incompatible versions of some others, like Zuul and Archaius. The Spring Cloud team moved some of the corresponding Spring-Cloud-Netflix projects into maintenance mode as well and proposed a newer, more modern Spring Cloud stack that could be used instead. During this talk, we would like to show how to move over to these newer solutions. We will discuss possible approaches, show a code demo and speak about potential issues and solutions.

Transcript

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2. 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
   Marcin Grzejszczak
   (@mgrzejszczak)
   Spring Cloud developer at Pivotal.
   ● Spring Cloud Sleuth
   ● Spring Cloud Contract
   ● CI / CD
   Blog:
   https://toomucoding.com
   

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3. 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
   

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4. Netflix projects passed into maintenance or superseded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
   

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5. Spring Cloud Netflix
   Maintenance Mode
   Greenwich RC1 announcement
   

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

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7. 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
   

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

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9. 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
   

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10. Spring Cloud New Stack
    Time to make the transition
    

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

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12. Spring Cloud Netflix Zuul → Spring Cloud Gateway
    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
    configuration
    ● Predicates and Filters
    ● All headers passed on by default
    

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13. ● More than 20 filters
    ● As the infra is no longer blocking you, you can now move to reactive Web in
    your services if it makes sense for your use-case
    

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14. 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 CircuitBreaker:
    ● 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 bean in a @Configuration class
    

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15. 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
    

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16. Spring Cloud Netflix Archaius → SC Config Server
    

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17. 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]
    

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18. Spring Cloud New Stack
    Should you make the change?
    

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19. Possible Issues
    

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

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21. Check out our projects
    

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

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