Quarkus k8s
•
1 like•841 views
This document introduces Quarkus, an open source Java framework for building container-native microservices. Quarkus uses GraalVM to compile Java code ahead-of-time, resulting in applications that are up to 10x smaller and 100x faster to start than traditional Java applications. It is optimized for Kubernetes and serverless workloads. Quarkus achieves these benefits through ahead-of-time compilation using GraalVM, which analyzes code statically and removes unused classes and code to generate efficient native executables.
Report
Share
Quarkus k8s
- 1. Introduction to Quarkus: A Container-First Cloud Native Framework Georgios Andrianakis, Red Hat
- 5. But Java has been showing its age...
- 6. Memory Hog 🐷
- 10. Serverless Adoption https://serverless.com/blog/2018-serverless-community-survey-huge-growth-usage
- 11. So who is this Quarkus— and what’s all the fuss? Up to 10x smaller, 100x faster Seriously.
- 12. Imperative and reactive Serverless Live reload Microservices Fat jars and native executables Optimized for JAX-RS & JPA (Hibernate) …
- 15. But how is this achieved?
- 16. Traditional Java apps (both app server and fat-jar stacks) ● Tons of classes loaded during boot time ○ Unused later on ○ Occupy a lot of memory ● Reflection used extensively XML Parsers, Annotation models….
- 17. Quarkus Do as much as possible at build time ● Annotation processing ● Configuration parsing ● Throw away all classes that are not needed at runtime ● Avoid runtime reflection as much as possible Output: generated classes
- 19. GraalVM
- 20. AoT with GraalVM
- 21. AoT with GraalVM ● Static Analysis ● Closed world assumptions ● Dead code elimination
- 22. GraalVM Limitations ● Dynamic classloading ○ Creating, reloading classes at runtime is not possible ● JVMTI, JMX ○ No agents ● InvokeDynamic, MethodHandles ○ But lambdas are supported
- 23. GraalVM Limitations ● Reflection ○ All targets of reflection need to be known ● Dynamic Proxies ○ All classes that will get proxied at runtime need to be declared ● Classpath resources ○ All resources to be included must be declared
- 24. GraalVM Limitations Example of manual invocation: native-image -jar target/app.jar -H:ReflectionConfigurationResources=reflection_config.json -H:Name=name --delay-class-initialization-to-runtime=io.netty.handler.codec.http.HttpObjectEncoder Quarkus shields you from all GraalVM peculiarities!
- 26. Demo time!
- 27. Thank you! Twitter: @geoand86 Further reading • http://quarkus.io • https://developers.redhat.com/blog/2019/03/07/quarkus- next-generation-kubernetes-native-java-framework/ • http://in.relation.to/2019/03/08/why-quarkus/