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Creating Cloud Native Buildpacks

Creating Cloud Native Buildpacks

Buildpacks have been the successful method for creating container images for a decade at Heroku and Cloud Foundry, before Dockerfiles existed. Cloud Native Buildpacks https://buildpacks.io are the latest set of tools and buildpacks to bring Buildpack methods for creating fast, secure images from your application source code.

In this talk I look at how to create new Cloud Native Buildpacks, how to test them, and how to distribute Builders for development teams to start using your buildpacks.

Dr Nic Williams

September 12, 2019
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  1. Title Text
    Body Level One
    Body Level Two
    Body Level Three
    Body Level Four
    Body Level Five
    Creating

    Cloud Native Buildpacks
    Cloud Foundry Summit Hague 2019
    Dr Nic Williams @drnic

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  2. @drnic
    Nothing should change for CF users
    EXCEPT
    This is about future v3 buildpacks
    WARNING

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  3. @drnic
    History
    v2 - Supply and Finalize
    CF own buildpacks evolved API
    Cloud Foundry had no buildpacks
    v1 - Heroku Buildpacks
    Borrowed API; offline buildpacks
    Ɲ
    v3 - Cloud Native Buildpacks
    Heroku and CF work together
    CNCF Incubator project
    Buildpacks are going everywhere

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  4. Cloud Foundry buildpacks thanks to…

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  6. @drnic
    Example
    NodeJS
    $ pack build starkandwayne/sample-app-nodejs
    [detector] ======== Results ========
    [detector] pass: Node Engine Buildpack
    [detector] pass: Yarn Buildpack

    [builder] -----> Node Engine Buildpack 0.0.26
    [builder] Node Engine 10.16.2:
    [builder] Downloading from …

    [builder] Process types:
    [builder] web: yarn start
    $ docker run -ti -p 8080:8080 \
    starkandwayne/sample-app-nodejs

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  7. @drnic
    Example
    Spring
    $ pack build starkandwayne/sample-app-java
    ===> DETECTING
    [detector] skip: [email protected]
    [detector] pass: [email protected]
    [detector] pass: [email protected]
    [detector] pass: [email protected]
    [detector] pass: [email protected]
    [detector] pass: [email protected]
    [detector] skip: [email protected]
    [detector] skip: [email protected]
    [detector] Resolving plan... (try #1)
    [detector] Success! (7)

    [builder] Cloud Foundry OpenJDK Buildpack 1.0.0-RC02
    [builder] OpenJDK JDK 11.0.4: Contributing to layer
    $ docker run -ti -p 8080:8080 \
    starkandwayne/sample-app-java

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  8. @drnic
    Deploy CF
    $ docker push starkandwayne/sample-app-nodejs
    $ cf push myapp \
    -o starkandwayne/sample-app-nodejs \
    -k 1536M
    $ cf logs my-node-app --recent

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  9. @drnic
    Buildpack
    API
    bin/detect
    Could this buildpack help this app?
    What requirements did we learn?
    ?
    bin/build
    Install dependencies
    Setup configuration
    Processes to launch
    #

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  10. @drnic
    Builder
    $ pack inspect-builder cloudfoundry/cnb
    Run Images:
    cloudfoundry/run:full-cnb
    Buildpacks:
    org.cloudfoundry.node-engine
    org.cloudfoundry.npm
    org.cloudfoundry.yarn
    org.cloudfoundry.python
    org.cloudfoundry.pip

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  11. @drnic
    Ordered
    Groups
    $ pack inspect-builder cloudfoundry/cnb

    Group #2:
    [email protected]
    [email protected]
    Group #3:
    [email protected]
    [email protected]
    Group #4:
    [email protected]
    [email protected] (optional)
    [email protected]

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  12. @drnic
    1, 2, 3, 4, 5, 6, 7, …, 15
    FIZZ BUZZ
    1, 2, fizz, 4, buzz, fizz, 7, …, fizzbuzz
    https://github.com/starkandwayne/fizzbuzz-cnb-builder

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  13. $ echo 1 > Count
    $ pack build myapp --builder fizzbuzz
    $ docker run myapp
    1
    $ echo 3 > Count
    $ pack build myapp --builder fizzbuzz
    $ docker run myapp
    fizz
    $ echo 15 > Count
    $ pack build myapp --builder fizzbuzz
    $ docker run myapp
    fizzbuzz
    https://github.com/starkandwayne/fizzbuzz-cnb-builder

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  14. @drnic
    FizzBuzz
    Buildpack
    bin/detect
    Does this app contain Count?
    ?
    bin/build
    Create executable to print Count
    or fizz, buzz, or fizzbuzz
    #

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  15. # bin/detect
    [ -f Count ]] || { echo "No Count file"; exit 1; }
    # bin/build
    cp -r $buildpack_dir/layer/* $layer_dir/
    !"" fizzbuzz
    # $"" bin
    # $"" display-count
    !"" fizzbuzz.toml
    $"" launch.toml
    https://github.com/starkandwayne/fizzbuzz-cnb-builder

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  16. # launch.toml
    [[processes]]
    command = "display-count"
    type = "web"
    # fizzbuzz.toml
    launch = true
    # fizzbuzz/bin/display-count
    #!/bin/bash
    count=$(cat Count)
    if [[ $(( $count % 15 )) == "0" ]]; then
    echo "fizzbuzz"
    elif [[ $(( $count % 5 )) == "0" ]]; then
    echo "buzz"
    elif [[ $(( $count % 3 )) == "0" ]]; then
    echo "fizz"
    else
    echo $count
    fi%
    https://github.com/starkandwayne/fizzbuzz-cnb-builder
    layer metadata layer contents

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  17. $ pack build app \
    --buildpack path/to/fizzbuzz \
    --path to/app
    ===> DETECTING
    [detector] ======== Results ========
    [detector] pass: [email protected]
    [detector] Resolving plan... (try #1)
    [detector] Success! (1)
    ===> BUILDING
    [builder] ---> FizzBuzz Buildpack
    ===> EXPORTING
    [exporter] *** Images:
    [exporter] …playtime:latest - succeeded

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  18. @drnic
    Print
    Message
    Buildpack
    bin/detect
    Does this app contain Message?
    ?
    bin/build
    Create executable to print Message
    #

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  19. $ rm Count
    $ echo "Hello World" > Message
    $ pack build myapp --builder fizzbuzz
    $ docker run myapp
    Hello World
    $ rm Count
    $ rm Message
    $ pack build myapp --builder fizzbuzz

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  20. # bin/detect
    [ -f Message ]] || { echo "No Message file"; exit 1; }
    # bin/build
    cp -r $buildpack_dir/layer/* $layer_dir/
    !"" launch.toml
    !"" print-message
    # !"" bin
    # # !"" display-message
    # # $"" show-message-twice
    # $"" profile.d
    # $"" message.sh
    $"" print-message.toml

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  21. $ pack build app \
    --buildpack path/to/print-message \
    --path to/app
    ===> DETECTING
    [detector] ======== Results ========
    [detector] pass: [email protected]
    [detector] Resolving plan... (try #1)
    [detector] Success! (1)
    ===> BUILDING
    [builder] ---> Print Message Buildpack
    ===> EXPORTING
    [exporter] *** Images:
    [exporter] …playtime:latest - succeeded

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  22. @drnic
    FizzBuzz
    Builder
    # builder.toml
    [[buildpacks]]
    id = "fizzbuzz"
    uri = "buildpacks/fizzbuzz"
    [[buildpacks]]
    id = "print-message"
    uri = "buildpacks/print-message"

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  23. @drnic
    FizzBuzz
    Builder
    # builder.toml

    [[order]]
    [[order.group]]
    id = "fizzbuzz"
    [[order]]
    [[order.group]]
    id = "print-message"

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  24. @drnic
    FizzBuzz
    Builder
    # builder.toml

    [stack]
    id = "io.buildpacks.stacks.bionic"
    build-image = "cloudfoundry/build:base-cnb"
    run-image = "cloudfoundry/run:base-cnb"

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  25. @drnic
    FizzBuzz
    Builder
    $ pack create-builder fizzbuzz -b builder.toml
    Creating builder fizzbuzz from
    build-image cloudfoundry/build:base-cnb
    $ pack build myapp
    --builder fizzbuzz
    Count app Message app
    Runnable OCI/docker image

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  26. @drnic
    FizzBuzz
    Builder
    $ pack inspect-builder fizzbuzz
    Run Images:
    cloudfoundry/run:base-cnb
    Buildpacks:
    com.starkandwayne.fizzbuzz
    com.starkandwayne.print-message
    Detection Order:
    Group #1:
    [email protected]
    Group #2:
    [email protected]

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  27. @drnic
    Example
    NodeJS
    $ pack build starkandwayne/sample-app-nodejs
    [detector] ======== Results ========
    [detector] pass: Node Engine Buildpack
    [detector] pass: Yarn Buildpack

    [builder] -----> Node Engine Buildpack 0.0.26
    [builder] Node Engine 10.16.2:
    [builder] Downloading from …

    [builder] Process types:
    [builder] web: yarn start
    $ docker run -ti -p 8080:8080 \
    starkandwayne/sample-app-nodejs

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  28. Nothing should change for CF users
    START MIGRATING
    Cloud Native (v3) buildpacks
    COMING SOON

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  29. @drnic
    CONTINUE
    TO FIZZBUZZ
    https://github.com/starkandwayne/fizzbuzz-cnb-builder
    https://buildpacks.io/docs/create-buildpack/

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