![Spring Cloud [Netflix]
• Proxy/Router – Zuul
• Service Registry and Discovery — Eureka
• Cirtcuit Breaker — Hystrix
• (Client Side) Load Balancing — Ribbon
• Configuration Management — Archaius](https://image.slidesharecdn.com/microservices-dwx-160621123835/85/Microservices-with-Spring-Cloud-25-320.jpg)
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Microservices with Spring Cloud
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- 2. Who are we? DanielEichten Paul Vassu
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- 4. – Wikipedia “Microservices area more concrete and modern interpretation of service-oriented architectures (SOA) used to build distributed software systems. Like in SOA, services in a microservice architecture are processes that communicate with each other over the network in order to fulfill a goal. Also, like in SOA, these services use technology agnostic protocols. Microservices architectural style is a first realisation of SOA that has happened after the introduction of DevOps and this is becoming the standard for building continuously deployed systems.”
- 5. “Microservices are fulfillingthe SOA promise!” – us
- 6. By Webysther Nunes- Own work, CC BY-SA 4.0https://commons.wikimedia.org/w/index.php?curid=39594469 http://martinfowler.com/articles/microservices.html
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- 8. Microservices • Small • Focused •Doing One Thing Well “Microservices are small, autonomous services that work together.” – Sam Newman • Technology heterogenic • Resilient • Scalable • Easy to deploy
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- 11. Downsides • Increased complexity throughdistribution • Dependency of Services • Handling of breaking changes • Operational overhead • Testing effort • Distributed transactions
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- 15. … there isno try!?
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- 17. Spring Boot • Convention-over-Configuration •Creates Standalone Applications • Embedded Container • Autoconfiguration • No XML SitUps • No Yak Shaving
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- 21. Why Monoliths arebad! • Changeability / Flexibility • Maintainability • Scalability • Resilience • Framework/Tech-Stack Lock-in
- 22. So, where tostart?!?
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- 25. Spring Cloud [Netflix] •Proxy/Router – Zuul • Service Registry and Discovery — Eureka • Cirtcuit Breaker — Hystrix • (Client Side) Load Balancing — Ribbon • Configuration Management — Archaius
- 26. Say hello toZuul!
- 27. Works, but notnice!
- 28. Static routes • arehard to maintain • have to be updated when service instance changes • do not offer load balancing between multiple instances • do not cater for service failures
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- 32. The services arestill mixing members with weather.
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- 43. Why? Gateway A B CD E F G H I J Request Request H Request Request Request Request Request
- 44. Why? 99.5% uptime( )1010components: ≈ 95% — 1 hour down / day 99.5% uptime( )2020 components: ≈ 90% — 2.5 hour down / day 99.5% uptime( )3030 components: ≈ 86% — 3+ hour down / day
- 45. How? • Fail fast,fail silent, rapidly recover • Stop cascading issues • Fallback gracefully (where possible) • Enable Monitoring, Alerting
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- 48. One more thing Afew s
- 49. Polyglotism • different languages •different frameworks • different datastores • Eureka very specific for AWS 😕 • Eureka Client lib Java only 😩
- 50. What about .net? •Nancy – Microservice Framework • Polly – Circuit Breaker • a lot to come with ASP.Net Core 11/13 chapters done release in Fall 2016
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- 52. • distributed Key-Value-Store •REST Interface • DNS Interface # • Multi Datacenter • Client libs for Go, Python, PHP, Scala, Java, Erlang, Ruby, node.js and C# • Replaces Eureka, Config Server, Cloud Bus
- 53. • distributed Key-Value-Store •REST Interface • DNS Interface with SkyDNS • very lightweight • easy to use • Client libs for Go, Python, Java, Scala, node.js, Ruby, C, C++, C#, Clojure, Erlang, PHP, Haskell, R, … • Replaces Eureka, Config Server
- 54. • distributed Key-Value-Store •build in Java originally to do Leader Election for Hadoop Clusters • very mature and stable / huge community • Client libs for Java, C#, PHP, Ruby, node.js, … • Curator by Netflix makes things easier • Replaces Eureka, Config Server and brings Leader Election, e.g. for Scheduled tasks in a whole cluster. Zookeeper
- 55. What else? • SpringCloud Task – AWS 𝜆-like API • Spring Cloud Security – OAuth2 Infrastructure • Spring Cloud Bus – Messaging between all components using Redis, AMQP, RabbitMQ, … • Spring Cloud Stream – Message driven Microservices using Redis, Kafka, RabbitMQ, …
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