Skaffold for Java: Continuous Development for Kubernetes

Originally presented at Oracle Code One 2018.

Skaffold: https://github.com/GoogleContainerTools/skaffold
Jib: https://github.com/GoogleContainerTools/jib
Demo project: https://github.com/coollog/skaffold-code.one

Session Description:

Skaffold is a command-line tool that facilitates continuous development for Kubernetes applications. You can iterate on your application source code locally and then deploy to local or remote Kubernetes clusters. Skaffold handles the workflow for building, pushing, and deploying your application. This session explores developing a Java application with Skaffold. This session presents and demos Java development on Kubernetes orchestrated by Skaffold and integrated with standard Java building tooling (Maven/Gradle).

Transcript

1. Continuous Development for Kubernetes
   Skaffold for Java
   github.com/GoogleContainerTools/skaffol
   d
   

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2. Skaffold
   github.com/GoogleContainerTools/skaffold
   

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3. Cloud Tools for Java
   Appu Goundan
   @loosebazooka
   Qingyang “Q” Chen
   @coollog
   

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4. Skaffold is a command line tool that facilitates continuous
   development for Kubernetes applications. You can iterate on your
   application source code locally then deploy to local or remote
   Kubernetes clusters. Skaffold handles the workflow for building,
   pushing and deploying your application. It can also be used in an
   automated context such as a CI/CD pipeline to leverage the same
   workflow and tooling when moving applications to production.
   github.com/GoogleContainerTools/skaffold
   official website
   

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5. "Dev"
   

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6. Build
   $ ./gradlew assemble
   

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7. Containerize
   $ ./gradlew assemble
   $ docker build . -t gcr.io/co-repo/co-app:v9
   

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8. Push
   $ ./gradlew assemble
   $ docker build . -t gcr.io/co-repo/co-app:v9
   $ docker push gcr.io/co-repo/co-app:v9
   

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9. Deploy
   $ ./gradlew assemble
   $ docker build . -t gcr.io/co-repo/co-app:v9
   $ docker push gcr.io/co-repo/co-app:v9
   $ vi co-deployment.yaml
   $ kubectl apply -f co-deployment.yaml
   

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10. Connect
    $ ./gradlew assemble
    $ docker build . -t gcr.io/co-repo/co-app:v9
    $ docker push gcr.io/co-repo/co-app:v9
    $ vi co-deployment.yaml
    $ kubectl apply -f co-deployment.yaml
    $ kubectl get pods
    $ kubectl port-forward co-pod-qx54dw 8080:8080
    $ kubectl logs -f co-pod-qx54dw
    

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12. code build push
    Development Process
    deploy application
    connect
    k8s config update
    Things I care about
    Things I wish would just happen
    

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13. Skaffold
    $ skaffold dev
    

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14. skaffold
    code
    Development Process
    application
    k8s config
    

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15. Demo
    

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16. Skaffold Workflow
    

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17. apiVersion: skaffold/v1alpha4
    kind: Config
    build:
    artifacts:
    - image: gcr.io/appu-learn/skaffold-talk
    context: app
    deploy:
    kubectl:
    manifests:
    - k8s-*
    Simple Skaffold Config
    kind: Deployment
    ...
    spec:
    template:
    spec:
    containers:
    - image: gcr.io/appu-learn/skaffold-talk
    ports:
    - containerPort: 8080
    skaffold.yaml k8s-deployment.yaml
    

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18. Pluggable
    

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22. Demo
    

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23. What about Java?
    What about Jib?
    

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24. github.com/GoogleContainerTools/jib
    1. Apply the plugin.
    1. Apply the plugin.
    2. gradle jib
    Steps:
    (or mvn jib:build)
    

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25. Jib ❤ Skaffold
    

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26. Jib
    

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27. apiVersion: skaffold/v1alpha4
    kind: Config
    build:
    artifacts:
    - imageName: gcr.io/appu-learn/skaffold-talk
    jibGradle: {}
    deploy:
    kubectl:
    manifests:
    - k8s-*
    Simple skaffold.yaml (powered up with Jib)
    apiVersion: skaffold/v1alpha4
    kind: Config
    build:
    artifacts:
    - imageName: gcr.io/appu-learn/skaffold-talk
    jibMaven: {}
    deploy:
    kubectl:
    manifests:
    - k8s-*
    

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28. apiVersion: skaffold/v1alpha4
    kind: Config
    build:
    artifacts:
    - imageName: gcr.io/appu-learn/skaffold-talk
    jibGradle:
    project: subproject
    deploy:
    kubectl:
    manifests:
    - k8s-*
    apiVersion: skaffold/v1alpha4
    kind: Config
    build:
    artifacts:
    - imageName: gcr.io/appu-learn/skaffold-talk
    jibMaven:
    profile: skaffold
    module: submodule
    deploy:
    kubectl:
    manifests:
    - k8s-*
    Simple skaffold.yaml (powered up with Jib)
    

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29. Lets see this in action!
    

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30. Survey App
    frontend-service
    Groovy/Micronaut/Gradle
    /
    cast votes
    vote-service
    Java/Spring/Gradle
    /results
    view results
    notification-service
    NodeJS
    

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31. apiVersion: skaffold/v1alpha4
    kind: Config
    build:
    artifacts:
    - image: gcr.io/qingyangc-sandbox/codeone-frontend
    jibGradle: {}
    context: frontend-service
    - image: gcr.io/qingyangc-sandbox/codeone-vote
    jibGradle: {}
    context: vote-service
    - image: gcr.io/qingyangc-sandbox/codeone-notification
    context: notification-service
    skaffold.yaml
    

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32. skaffold dev
    github.com/coollog/skaffold-code.one
    

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33. skaffold-code.one
    github.com/coollog/skaffold-code.one
    

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34. Other features
    - skaffold run
    - skaffold build
    - remote file sync
    - --trigger=manual
    Future features
    - Debugger
    - Test phase
    - IDE support
    - skaffold init with Jib
    - Beta
    

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35. github.com/GoogleContainerTools/skaffold
    github.com/GoogleContainerTools/jib
    github.com/coollog/skaffold-code.one
    

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