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Developer Experience with Spring Boot on Kubernetes

Developer Experience with Spring Boot on Kubernetes

As a developer, working with Kubernetes too often leads to too much cognitive load, inefficient inner development loop, and friction in the path to production. This session is structured as a series of iterations on the developer experience to improve those three aspects and boost productivity.

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 focuses 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 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

May 21, 2023
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  1. Thomas Vitale
    Spring I/O
    May 19th, 2023
    Developer Experience
    With Spring Boot on Kubernetes
    @vitalethomas

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  2. Systematic
    • Software Engineer and Cloud
    Architect.

    • Author of “Cloud Native Spring
    in Action” (Manning).

    • OSS contributor (Java, Spring,
    Cloud Native Technologies)
    Thomas Vitale
    thomasvitale.com @vitalethomas

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  3. Problem
    @vitalethomas

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  4. Value
    @vitalethomas

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  5. Delivering Value
    From idea to production
    Developer
    Production
    Idea
    @vitalethomas
    ?

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  6. Developer Experience
    @vitalethomas

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  7. 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

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  8. Developer Experience: Concept and De
    fi
    nition
    (F. Fagerholm, J. Münch)
    Developer Experience
    Conceptual Framework
    @vitalethomas

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  9. Value
    @vitalethomas

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  10. Developer Experience
    Tools are not enough
    ORGANIZATION
    PROCESSES
    TECHNOLOGY
    CULTURE
    @vitalethomas

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  11. Technologies
    Developer experience with Java on Kubernetes
    @vitalethomas

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  12. Team Topologies
    Organisational design for software
    @vitalethomas

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  13. Continuous Delivery
    Better software faster
    @vitalethomas

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  14. Goals
    2 Reduced cognitive load
    3 Clear and safe path to production
    1 Rapid and continuous feedback loop
    @vitalethomas

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  15. Development Workflow
    @vitalethomas

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  16. Cloud Native
    @vitalethomas

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  17. From Traditional to Cloud Native
    Application Server, Embedded Server
    Runtime (JVM)
    Middleware (Application Server)
    Application (WAR/EAR)
    Runtime (JVM)
    Application (JAR)
    @vitalethomas

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  18. Containers
    @vitalethomas

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  19. 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

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  20. Dockerfiles
    “Dockerfiles are easy to write, but the current
    development guidelines do not produce
    containers that are repeatable and hardened.”

    CNCF Software Supply Chain Security Paper
    https://github.com/cncf/tag-security/tree/main/supply-chain-security
    @vitalethomas

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  21. Cloud Native Buildpacks
    @vitalethomas

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  22. Image
    pack build
    Cloud Native Buildpacks
    From source code to container image
    @vitalethomas

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  23. Kubernetes
    @vitalethomas

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  24. 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

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  25. Working with Kubernetes
    Manifests for application deployment
    Deployment


    Deploy the application
    and con
    fi
    gure replication
    Service


    Expose the application
    from within the cluster
    @vitalethomas
    Ingress


    Expose the application
    from outside the cluster

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  26. Tilt
    @vitalethomas

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  27. Tilt
    Continuous development on Kubernetes
    @vitalethomas
    CODE
    BUILD
    RUN
    TEST
    Inner
    Development
    Loop

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  28. Development Workflow
    Inner Loop and Outer Loop
    Inner Loop
    ‣Code


    ‣Build


    ‣Run


    ‣Test
    Outer Loop
    ‣CI/CD


    ‣Compliance, security


    ‣Con
    fi
    guration, monitoring


    ‣Production deployment
    git push
    @vitalethomas

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  29. Inner Development Loop
    Code, build, test
    E
    ffi
    cient Inner Development Loops for Cloud Native Applications
    https://www.getambassador.io/resources/inner-dev-loop/
    @vitalethomas

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  30. Skaffold
    @vitalethomas

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  31. Skaffold
    Continuous development on Kubernetes
    @vitalethomas
    CODE
    BUILD
    RUN
    TEST
    Inner
    Development
    Loop

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  32. Argo CD
    @vitalethomas

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  33. Argo CD
    Continuous Deployment with GitOps
    @vitalethomas
    Developer
    App Repo
    Pull Request Sync changes
    Temporary
    Environment

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  34. Knative
    @vitalethomas

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  35. Knative
    Serverless experience on Kubernetes
    @vitalethomas

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  36. Serverless Architectures
    Developers focus on code
    Focus on business logic
    Developer
    Platform
    Infrastructure

    Provisioning
    Workload

    Management
    Dynamic

    Scaling
    @vitalethomas

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  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

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  38. “Something a bit different than what today’s
    world is trying to offer - LESS tools!”

    @vitalethomas
    What does Developer Experience mean to you?

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  39. Capabilities over responsibilities
    @vitalethomas

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  40. Developer
    @vitalethomas

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  41. Developer Platform
    @vitalethomas

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  42. Developer Platform
    @vitalethomas

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  43. Cartographer
    @vitalethomas

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  44. Delivering Value
    From code to production
    Developer
    Production
    Application


    Operator
    Security


    Expert
    Platform


    Engineer
    @vitalethomas

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  45. “Something a bit different than what today’s
    world is trying to offer - LESS tools!”

    @vitalethomas
    “Let developers be professionals and do what
    they do best. Let them be proud of their work!”

    What does Developer Experience mean to you?

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  46. Kubernetes Native Choreographer
    Framework to build paved paths to production
    @vitalethomas

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  47. Workload API
    Developer-friendly interface
    @vitalethomas
    apiVersion: carto.run/v1alpha1


    kind: Workload


    metadata:


    name: band-service


    labels:


    apps.kadras.io/workload-type: web


    spec:


    source:


    git:


    url: https://github.com/ThomasVitale/band-service


    ref:


    branch: main


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  48. Watch


    Source Code
    Testing
    Build
    Con
    fi
    guration
    Deployment
    @vitalethomas

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  49. cartographer.sh

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  50. Goals
    2 Reduced cognitive load
    3 Clear and safe path to production
    1 Rapid and continuous feedback loop
    @vitalethomas

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  51. Backstage
    @vitalethomas

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  52. backstage.io

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  53. DevPod
    @vitalethomas

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  54. Resources
    @vitalethomas

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  55. Resources
    • Presentation source code

    • Kadras: Cloud Native Platforms Toolkit

    • Cloud Native Buildpacks for ARM64

    • Software Supply Chain Choreography

    • Cartographer

    • Cartographer CLI

    • Knative and Spring: Bringing back the func

    • Tanzu Application Platform
    @vitalethomas

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  56. https://github.com/ThomasVitale/awesome-spring

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  57. Thomas Vitale
    Spring I/O
    May 19th, 2023
    Developer Experience
    With Spring Boot on Kubernetes
    @vitalethomas

    View full-size slide