A Polyglot Developer Experience on Kubernetes: Docker-less and YAML-less

Let's build a CaaS (Containers-as-a-Service) platform that delivers a similar experience to well-loved solutions like Google Cloud Run and Azure Container Apps. Those platforms allow you to run your applications without the need to know about containers or Kubernetes. They take your source code and remotely build and deploy your software while hiding away the complexity of Docker and Kubernetes. This presentation gives practical advice on how to build such a platform in a cloud provider-agnostic way on top of Kubernetes using only open-source projects.

Thomas and Mauricio will show how the platform can scale and provide developers with a polyglot environment to code, build and deploy their event-driven applications. The presentation will cover how tools like Knative, CloudEvents, Buildpacks, func CLI, and popular languages like Java, Go, and Python can be glued together to provide an optimized polyglot developer experience that can be tested and demoed in front of a live audience.

Transcript

1. Mauricio Salatino & Thomas Vitale
   KubeCon + CloudNativeCon Europe
   May 18th, 2022
   A Polyglot Developer
   Experience on Kubernetes
   Docker-less and YAML-less
   @salaboy @vitalethomas
   

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2. Mauricio Salatino
   VMware - Knative OSS
   • a.k.a @Salaboy
   
   • Sta
   ff
   Engineer - Knative Eventing
   tech lead for VMware
   
   • Knative OSS core contributor
   
   • Passionate about Functions,
   Platforms, Open Source and
   Kubernetes
   salaboy.com
   

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3. Systematic
   • Software Architect at
   Systematic, Denmark.
   
   • Author of “Cloud Native Spring
   in Action” (Manning).
   
   • Spring Security and Spring
   Cloud contributor.
   Thomas Vitale
   thomasvitale.com @vitalethomas
   

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4. Quiz Game
   thomasvitale.com @vitalethomas
   @salaboy @vitalethomas
   Building applications using functions
   

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5. Serverless
   @salaboy @vitalethomas
   

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6. Serverless Architectures
   Developers focus on code
   Focus on business logic
   @salaboy @vitalethomas
   Developer
   Platform
   Infrastructure
   
   Provisioning
   Workload
   
   Management
   Dynamic
   
   Scaling
   

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7. Knative Serving
   Serverless Containers on Kubernetes
   Developer-friendly
   
   abstractions
   From code to URL
   Autoscaling
   
   Scaling to zero
   Progressive
   
   Rollouts
   Request-driven
   
   Event-driven
   @salaboy @vitalethomas
   Cloud agnostic
   

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8. buildpacks.io
   

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9. Demo
   thomasvitale.com @vitalethomas
   @salaboy @vitalethomas
   Knative Serving and Buildpacks - From code to URL
   

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10. Platform 1 - Serverless experience
    From containers to deployment with autoscaling
    @salaboy @vitalethomas
    Image
    pack kn
    URL
    Kubernetes Cluster
    Container
    Container
    Container
    Knative
    Serving
    

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11. Functions
    @salaboy @vitalethomas
    

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12. Functions
    Functional programming model
    Triggered by
    requests or events
    Stateless Smaller scope
    Cold start Cost optimization
    @salaboy @vitalethomas
    

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13. Functions Patterns
    Topologies for functional programming
    @salaboy @vitalethomas
    Asynchronous
    processing
    Event-based
    Data stream
    
    via chained
    functions
    Synchronous
    Asynchronous
    Fire and Forget
    Request/
    Response
    Request/
    Response (State)
    

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14. Demo
    thomasvitale.com @vitalethomas
    @salaboy @vitalethomas
    Knative Functions - From idea to URL
    

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15. More on Knative Functions
    In active development, join the community!
    External templates
    
    repository
    Run locally with
    
    func run
    On-cluster build,
    
    no Docker required
    Roadmap to 1.0 GA
    @salaboy @vitalethomas
    Works with multiple
    languages and
    frameworks
    

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16. Platform 2 - Polyglot Functions
    From idea to deployment with autoscaling
    @salaboy @vitalethomas
    URL
    func create
    Image
    func deploy
    Kubernetes Cluster
    Container
    Container
    Container
    Knative
    Serving
    

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17. Events
    @salaboy @vitalethomas
    

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18. CloudEvents
    Interoperability and standardization
    Metadata
    Data
    Id
    
    Source
    
    Type
    Payload
    JSON
    
    AMQP
    
    Kafka
    
    MQTT
    @salaboy @vitalethomas
    

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19. Knative Eventing
    Event routing and triggers
    Developer-friendly
    
    abstractions
    Event-driven
    architectures
    Event routing
    Polyglot support
    with CloudEvents
    Pluggable
    @salaboy @vitalethomas
    Cloud agnostic
    

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20. Platform 3 - Knative Eventing
    Event-driven and reactive functions
    @salaboy @vitalethomas
    URL
    func create
    + trigger
    Image
    func deploy
    Kubernetes Cluster
    Container Container
    Knative
    Serving &
    Eventing
    Knative Broker
    Knative Event Sources
    Trigger A Trigger B
    

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21. Game - Architecture
    @salaboy @vitalethomas
    

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22. Kubernetes Cluster
    Game - Functions
    Synchronous functions with Knative
    
    
    
    React Application
    
    
    
    Game FrontEnd
    
    
    
    Start Game
    
    
    
    Level X
    
    
    …
    
    
    
    Get LeaderB
    Redis
    
    
    (State)
    HTTP
    SYNC
    
    
    
    Level 1
    
    
    …
    

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23. Game - Eventing
    Knative Eventing, CloudEvents & RSocket
    Kubernetes Cluster
    
    
    
    React Application
    
    
    
    Game FrontEnd
    
    
    
    Level X
    
    
    …
    Redis
    HTTP SYNC
    Broker
    Trigger
    Score
    
    CloudEvent
    RSocket
    GameScore
    
    CloudEvent
    Trigger
    Another
    Function
    

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24. Discount codes
    Manning
    • 35% discount code, valid for
    all products in all format
    
    • ctwkucoeu22
    
    
    • manning.com
    

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25. Resources
    Source code
    • Learn more about the game:
    
    • https://github.com/salaboy/from-monolith-to-k8s/tree/main/game
    
    • Deploy the game on Kubernetes:
    
    • https://github.com/ThomasVitale/eventing-game
    
    • Knative: https://knative.dev
    
    • Knative Functions: https://github.com/knative-sandbox/kn-plugin-func
    

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26. Mauricio Salatino & Thomas Vitale
    KubeCon + CloudNativeCon Europe
    May 18th, 2022
    A Polyglot Developer
    Experience on Kubernetes
    Docker-less and YAML-less
    @salaboy @vitalethomas
    

    View Slide