Inner Development Loop with Java on Kubernetes

In the cloud-native world, being a developer might be challenging. The number of technologies and patterns to know can be overwhelming. This session presents an approach based on open-source technologies and focused on improving the inner development loop and continuous delivery on Kubernetes. The end goal is to deliver value continuously, quickly, and reliably.

First, I’ll present several techniques for working locally in an effective and productive way. Should you run Kubernetes in your development environment? I’ll cover a few different options. Using Java and Spring Boot, we’ll build a cloud native application following the principles of test-driven development. The inner development loop will be enhanced with Cloud Native Buildpacks, Tilt, Knative, and Telepresence.

Continuous integration is a crucial practice for continuous delivery. We’ll check in code regularly, triggering an automated process to build, test, and package the application. Do you use pull requests? Relying on ArgoCD and the GitOps principles, I’ll show you how to work with temporary environments created dynamically when a new pull request is opened.

Finally, we'll use Cartographer to glue together all these different tools and design a golden path to production on Kubernetes, providing a clear separation of concerns and letting developers focus on the business logic.

Transcript

1. Thomas Vitale GOTO Copenhagen Oct 5th, 2022 Inner Development Loop With Java on Kubernetes @vitalethomas
2. Systematic • Software Architect at Systematic, Denmark. • Author of “Cloud Native Spring in Action” (Manning). • OSS contributor (Java, Spring, Cloud Native Technologies) Thomas Vitale thomasvitale.com @vitalethomas
3. Inner Development Loop #GOTOcph @vitalethomas CODE RUN TEST DEBUG
4. Developer Experience #GOTOcph @vitalethomas
5. #GOTOcph @vitalethomas Developer Experience “Top of mind for everyone”
6. Developer Experience “…developer experience could be defined as a means for capturing how developers think and feel about their activities within their working environments, with the assumption that an improvement of the developer experience has positive impacts on characteristics such as sustained team and project performance.” (F. Fagerholm, J. Münch) Developer Experience: Concept and De fi nition (F. Fagerholm, J. Münch) #GOTOcph @vitalethomas
7. Developer Experience: Concept and De fi nition (F. Fagerholm, J. Münch) Developer Experience Conceptual Framework #GOTOcph @vitalethomas
8. Value #GOTOcph @vitalethomas
9. Developer Experience Tools are not enough ORGANIZATION PROCESSES TECHNOLOGY CULTURE #GOTOcph @vitalethomas
10. Technologies Developer experience with Java on Kubernetes #GOTOcph @vitalethomas
11. Team Topologies Organisational design for software #GOTOcph @vitalethomas
12. Continuous Delivery Better software faster #GOTOcph @vitalethomas
13. Development Workflow #GOTOcph @vitalethomas
14. Development Workflow Inner Loop and Outer Loop Inner Loop ‣Code ‣Run ‣Test ‣Debug Outer Loop ‣CI/CD ‣Compliance, security ‣Con fi guration, monitoring ‣Production deployment git push #GOTOcph @vitalethomas
15. Inner Development Loop Code, build, test E ffi cient Inner Development Loops for Cloud Native Applications https://www.getambassador.io/resources/inner-dev-loop/ #GOTOcph @vitalethomas
16. Goals 2 Reduced cognitive load 3 Clear path to production 1 Rapid and continuous feedback loop #GOTOcph @vitalethomas
17. Cloud Native #GOTOcph @vitalethomas
18. From Traditional to Cloud Native Application Server, Embedded Server Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR) #GOTOcph @vitalethomas
19. Containers #GOTOcph @vitalethomas
20. Moving to Containers Application Server, Embedded Server, Container Runtime (OCI) Application (Container) #GOTOcph @vitalethomas Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR)
21. Cloud Native Buildpacks #GOTOcph @vitalethomas
22. Image pack build Cloud Native Buildpacks From source code to container image #GOTOcph @vitalethomas
23. Cloud Native Buildpacks From source code to container image #GOTOcph @vitalethomas
24. Kubernetes #GOTOcph @vitalethomas
25. Moving to Kubernetes Application Server, Embedded Server, Container, Kubernetes Runtime (OCI) Middleware (Kubernetes) Application (Container) #GOTOcph @vitalethomas Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR) Runtime (OCI) Application (Container)
26. Tilt #GOTOcph @vitalethomas
27. Tilt Continuous development on Kubernetes #GOTOcph @vitalethomas
28. Tilt Continuous development on Kubernetes #GOTOcph @vitalethomas
29. Skaffold #GOTOcph @vitalethomas
30. Skaffold Continuous development on Kubernetes #GOTOcph @vitalethomas
31. Telepresence #GOTOcph @vitalethomas
32. Telepresence Local-to-remote bridges for fast iterations #GOTOcph @vitalethomas
33. Knative #GOTOcph @vitalethomas
34. Knative Serverless experience on Kubernetes #GOTOcph @vitalethomas
35. Serverless Architectures Developers focus on code Focus on business logic Developer Platform Infrastructure Provisioning Workload Management Dynamic Scaling #GOTOcph @vitalethomas
36. Knative Serving Serverless Experience on Kubernetes Developer-friendly abstractions From image to URL Autoscaling Scaling to zero Progressive Rollouts Request-driven Event-driven Cloud agnostic #GOTOcph @vitalethomas
37. Argo CD #GOTOcph @vitalethomas
38. Argo CD Continuous Deployment with GitOps #GOTOcph @vitalethomas
39. Goals 2 Reduced cognitive load 3 Clear path to production 1 Rapid and continuous feedback loop #GOTOcph @vitalethomas
40. Configuration Management #GOTOcph @vitalethomas
41. Configuration Management On Kubernetes #GOTOcph @vitalethomas
42. https://carvel.dev
43. Capabilities over responsibilities #GOTOcph @vitalethomas
44. #GOTOcph @vitalethomas Developer
45. #GOTOcph @vitalethomas Developer Platform ?
46. #GOTOcph @vitalethomas Developer Platform ?
47. #GOTOcph @vitalethomas Developer Platform
48. Cartographer #GOTOcph @vitalethomas
49. Cartographer Golden paths to production #GOTOcph @vitalethomas
50. Delivering Value From code to production Developer App Repo Production Application Operator Security Expert Platform Engineer
51. Goals 2 Reduced cognitive load 3 Clear path to production 1 Rapid and continuous feedback loop #GOTOcph @vitalethomas
52. Resources #GOTOcph @vitalethomas
53. Resources Source code • Presentation source code • Kadras: Application Platform Toolkit • The developer experience and the inner dev loop • Docker fi les vs. Cloud Native Buildpacks • Knative and Spring: Bringing back the func • Developer Work fl ow • Software Supply Chain Choreography #GOTOcph @vitalethomas
54. https://github.com/ThomasVitale/awesome-spring
55. Discount codes Manning • 35% discount code, valid for all products in all format • ctwgotocph22 • manning.com thomasvitale.com @vitalethomas
56. Thomas Vitale GOTO Copenhagen Oct 5th, 2022 Inner Development Loop With Java on Kubernetes @vitalethomas