Developer Experience with Java on Kubernetes (DevCon 2022)

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 effectively and productively. 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 delivering value.

Transcript

1. Thomas Vitale DevCon Nov 10th, 2022 Developer Experience 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
4. Problem @vitalethomas
5. Delivering Value From idea to production Developer App Repo Production Idea @vitalethomas
7. Inner Development Loop @vitalethomas CODE RUN TEST DEBUG
8. Developer Experience @vitalethomas
9. Developer Experience “Top of mind for everyone” @vitalethomas
10. 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) @vitalethomas
11. Value @vitalethomas
12. Developer Experience Tools are not enough ORGANIZATION PROCESSES TECHNOLOGY CULTURE @vitalethomas
13. Technologies Developer experience with Java on Kubernetes @vitalethomas
14. Team Topologies Organisational design for software @vitalethomas
15. Continuous Delivery Better software faster @vitalethomas
16. Development Workflow @vitalethomas
17. 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 @vitalethomas
18. Goals 2 Reduced cognitive load 3 Clear path to production 1 Rapid and continuous feedback loop @vitalethomas
19. Cloud Native @vitalethomas
20. From Traditional to Cloud Native Application Server, Embedded Server Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR) @vitalethomas
21. Containers @vitalethomas
22. Moving to Containers Application Server, Embedded Server, Container Runtime (OCI) Application (Container) Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR) @vitalethomas
23. Cloud Native Buildpacks @vitalethomas
24. Image pack build Cloud Native Buildpacks From source code to container image @vitalethomas
25. Kubernetes @vitalethomas
26. Moving to Kubernetes Application Server, Embedded Server, Container, Kubernetes Runtime (OCI) Middleware (Kubernetes) Application (Container) Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR) Runtime (OCI) Application (Container) @vitalethomas
27. Tilt @vitalethomas
28. Tilt Continuous development on Kubernetes @vitalethomas
29. Tilt Continuous development on Kubernetes @vitalethomas
30. Skaffold @vitalethomas
31. Skaffold Continuous development on Kubernetes @vitalethomas
32. Telepresence @vitalethomas
33. Telepresence Local-to-remote bridges for fast iterations @vitalethomas
34. Knative @vitalethomas
35. Knative Serverless experience on Kubernetes @vitalethomas
36. Serverless Architectures Developers focus on code Focus on business logic Developer Platform Infrastructure Provisioning Workload Management Dynamic Scaling @vitalethomas
37. 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 @vitalethomas
38. Argo CD @vitalethomas
39. Argo CD Continuous Deployment with GitOps @vitalethomas
40. Goals 2 Reduced cognitive load 3 Clear path to production 1 Rapid and continuous feedback loop @vitalethomas
41. Configuration Management @vitalethomas
42. Configuration Management On Kubernetes @vitalethomas
43. https://carvel.dev
44. Capabilities over responsibilities @vitalethomas
45. Developer @vitalethomas
46. Developer Platform ? @vitalethomas
47. Developer Platform ? @vitalethomas
48. Developer Platform @vitalethomas
49. Cartographer @vitalethomas
50. Cartographer Golden paths to production @vitalethomas
51. Delivering Value From code to production Developer App Repo Production Application Operator Security Expert Platform Engineer @vitalethomas
52. Example: Minimal Path Source -> Image -> URL Deploy to Kubernetes Package as container image Checkout source code
53. Goals 2 Reduced cognitive load 3 Clear path to production 1 Rapid and continuous feedback loop @vitalethomas
54. Resources @vitalethomas
55. 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 @vitalethomas
56. https://github.com/ThomasVitale/awesome-spring
57. Discount codes Manning • 35% discount code, valid for all products in all format • ctwdevcon22 • manning.com @vitalethomas
58. Thomas Vitale DevCon Nov 10th, 2022 Developer Experience With Java on Kubernetes @vitalethomas