Spring I/O 2022: Knative and Spring - Bringing back the `func`
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The document summarizes a presentation by Mauricio Salatino and Thomas Vitale on using Knative and Spring to build serverless applications and functions. It includes demos of deploying Spring Cloud Functions on Knative to create serverless containers from code and route events between functions. It also describes using Knative Eventing to build an event-driven game architecture with reactive functions.
![Spring Cloud Functions Routing
Routing Events to functions
A()
CloudEvent
B()
C()
Router
[Ce-Type]](https://image.slidesharecdn.com/knativeandspring-bringingbackthefuncspringio-220527150038-c82e6390/85/Spring-I-O-2022-Knative-and-Spring-Bringing-back-the-func-26-320.jpg)
Spring I/O 2022: Knative and Spring - Bringing back the `func`
- 1. Mauricio Salatino & Thomas Vitale Spring I/O May 27th, 2022 Knative and Spring Bringing back the func @salaboy @vitalethomas
- 2. Mauricio Salatino VMware - Knative OSS * a.k.a @Salaboy * Sta ff Engineer - Knative Eventing tech lead for VMware * Knative OSS core contributor * Passionate about Functions, Platforms, Open Source and Kubernetes salaboy.com
- 3. Systematic * Software Architect at Systematic, Denmark. * Author of “Cloud Native Spring in Action” (Manning). * Spring Security and Spring Cloud contributor. Thomas Vitale thomasvitale.com @vitalethomas
- 4. Quiz Game thomasvitale.com @vitalethomas @salaboy @vitalethomas Building applications using functions
- 6. Serverless Architectures Developers focus on code Focus on business logic @salaboy @vitalethomas Developer Platform Infrastructure Provisioning Workload Management Dynamic Scaling
- 7. Knative Serving Serverless Containers on Kubernetes Developer-friendly abstractions From code to URL Autoscaling Scaling to zero Progressive Rollouts Request-driven Event-driven @salaboy @vitalethomas Cloud agnostic
- 9. Demo thomasvitale.com @vitalethomas @salaboy @vitalethomas Knative Serving and Buildpacks - From code to URL
- 10. Platform v1 - Serverless experience From containers to deployment with autoscaling @salaboy @vitalethomas Image pack kn URL Kubernetes Cluster Container Container Container Knative Serving
- 12. Demo thomasvitale.com @vitalethomas @salaboy @vitalethomas Knative Functions - From code to URL
- 13. Functions Functional programming model Triggered by requests or events Stateless Smaller scope Cold start Cost optimization @salaboy @vitalethomas
- 14. Functions Patterns Topologies for functional programming @salaboy @vitalethomas Asynchronous processing Event-based Data stream via chained functions Synchronous Asynchronous Fire and Forget Request/ Response Request/ Response (State)
- 15. More on Knative Functions In active development, join the community! External templates repository Run locally with func run On-cluster build, no Docker required Roadmap to 1.0 GA @salaboy @vitalethomas Works with multiple languages and frameworks
- 16. Platform v2 - Polyglot Functions From idea to deployment with autoscaling @salaboy @vitalethomas URL func create Image func deploy Kubernetes Cluster Container Container Container Knative Serving
- 17. Functions with Spring @salaboy @vitalethomas
- 18. Spring Native Native executables with GraalVM Slower Heavier Build Instant Startup Reduced Memory Consumption Instant Peak Performance Fewer Runtime Optimizations @salaboy @vitalethomas
- 19. Functional Programming Paradigm Java 8 Functional Interfaces Supplier<O> Function<I,O> Consumer<I> @salaboy @vitalethomas
- 20. Spring Cloud Function Business logic as functions Transparent Type Conversion Function Arity Function Composition Reactive Support JAR Functions @salaboy @vitalethomas
- 21. Demo thomasvitale.com @vitalethomas @salaboy @vitalethomas Knative Functions - From code to URL
- 22. Function Composition Data processing via functions uppercase() sentence() Data processing “I play the PIANO” “piano” “PIANO”
- 23. Spring Cloud Function Deployment and integrations Knative CloudEvents RSocket Azure Functions Google Cloud Functions AWS Lambda @salaboy @vitalethomas
- 25. CloudEvents Interoperability and standardization Metadata Data Id Source Type Payload JSON AMQP Kafka MQTT @salaboy @vitalethomas
- 26. Spring Cloud Functions Routing Routing Events to functions A() CloudEvent B() C() Router [Ce-Type]
- 27. Knative Eventing Event routing and triggers Developer-friendly abstractions Event-driven architectures Event routing Polyglot support with CloudEvents Pluggable @salaboy @vitalethomas Cloud agnostic
- 28. Platform v3 - Knative Eventing Event-driven and reactive functions @salaboy @vitalethomas URL func create + trigger Image func deploy Kubernetes Cluster Container Container Knative Serving & Eventing Knative Broker Knative Event Sources Trigger A Trigger B
- 29. Game - Architecture @salaboy @vitalethomas
- 30. Kubernetes Cluster Game - Functions Synchronous functions with Knative <Client Side> React Application <Orchestrator> Game FrontEnd <Function> Start Game <Function> Level X … <Function> Get LeaderB Redis (State) HTTP SYNC <Function> Level 1 …
- 31. Game - Eventing Knative Eventing, CloudEvents & RSocket Kubernetes Cluster <Client Side> React Application <Orchestrator> Game FrontEnd <Function> Level X … Redis HTTP SYNC Broker Trigger Score CloudEvent RSocket GameScore CloudEvent Trigger Another Function
- 33. Discount codes Manning • 45% discount code, valid for all products in all format • ctwspringio22 • manning.com
- 34. Resources Source code • Learn more about the game: • https://github.com/salaboy/from-monolith-to-k8s/tree/main/game • Deploy the game on Kubernetes: • https://github.com/ThomasVitale/eventing-game • Spring Cloud Function samples: • https://github.com/ThomasVitale/springio-2022-knative-spring-func