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Developer Experience with Java on Kubernetes (DevCon 2022)

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.

Thomas Vitale

November 19, 2022
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  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
  3. None
  4. Problem @vitalethomas

  5. Delivering Value From idea to production Developer App Repo Production

    Idea @vitalethomas
  6. None
  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