Cloud Native with Spring Boot and Kubernetes

Principles and patterns for building cloud native application using Spring Boot, containerizing them with Cloud Native Buildpacks, and deploying them on a Kubernetes cluster through a GitOps workflow.

Transcript

1. Thomas Vitale @vitalethomas thomasvitale.com
   Cloud Native
   With Spring Boot and Kubernetes
   Systematic - 10/02/2021
   systematic.com
   

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2. Thomas Vitale
   • Senior Software Engineer at
   Systematic, Denmark.
   
   • Spring, Cloud Native, DevOps,
   Application Security.
   
   • Author of “Cloud Native Spring in
   Action - With Spring Boot and
   Kubernetes” (Manning).
   About Me
   

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3. Why Cloud Native?
   @SystematicGroup @vitalethomas
   

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4. The Three P’s of Cloud Native Applications
   Place
   Private Cloud
   
   
   Public Cloud
   
   
   Hybrid Cloud
   Properties
   Scalability
   
   
   Loose Coupling
   
   
   Resilience
   
   
   Manageability
   
   
   Observability
   
   
   Security
   Practices
   Automation
   
   
   Continuous Delivery
   
   
   DevOps
   @SystematicGroup @vitalethomas
   

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5. The Goals
   Speed
   Faster and
   fl
   exible delivery
   Cost
   
   
   Ef
   fi
   ciency and cost optimisation
   Scale
   Elasticity and dynamic scaling
   Resilience
   Availability and stability
   @SystematicGroup @vitalethomas
   

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6. 1. Application Server
   @SystematicGroup @vitalethomas
   

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7. 2 Embedded server
   3 Imperative vs. Reactive
   @SystematicGroup @vitalethomas
   1 “Make JAR, not WAR” (Josh Long)
   

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8. @SystematicGroup @vitalethomas
   Embedded Server + JAR Packaging
   Embedded Server
   
   
   Blocking + Servlet API
   
   
   (Tomcat, Undertow, Jetty)
   
   
   Spring Web
   Embedded Server
   
   
   Non-Blocking + Project Reactor
   
   
   (Netty)
   
   
   Spring WebFlux
   Serverless
   
   
   Functions
   
   
   (AWS, Azure, GCP, Knative)
   
   
   Spring Cloud Functions
   

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9. Demo
   Embedded Server + JAR Packaging
   https://github.com/ThomasVitale/cloud-native-spring-webinar-feb-2021
   @SystematicGroup @vitalethomas
   

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10. 2. Containerization
    @SystematicGroup @vitalethomas
    

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11. 1 Don’t use fat JARs
    2 Optimize build/runtime performance
    3 Don’t run as root or include secrets
    @SystematicGroup @vitalethomas
    

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12. Containerize Spring Boot Applications
    @SystematicGroup @vitalethomas
    Docker
    fi
    les
    Cloud Native Buildpacks
    Jib
    

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13. Demo
    Containerizing Spring Boot
    https://github.com/ThomasVitale/cloud-native-spring-webinar-feb-2021
    @SystematicGroup @vitalethomas
    

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14. 3. Kubernetes Deployment
    @SystematicGroup @vitalethomas
    

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15. 1 Define a Namespace manifest
    2 Define a Deployment manifest
    3 Define a Service manifest
    @SystematicGroup @vitalethomas
    

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16. Demo
    Kubernetes Deployment
    https://github.com/ThomasVitale/cloud-native-spring-webinar-feb-2021
    @SystematicGroup @vitalethomas
    

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17. 4. Application Lifecycle
    @SystematicGroup @vitalethomas
    

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18. 1
    2
    3
    Fast start-up, graceful shutdown
    Liveness and readiness probes
    Stateless and horizontally scalable
    @SystematicGroup @vitalethomas
    

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19. Liveness and Readiness Probes
    Application
    ALIVE?
    READY?
    NO
    NO
    Restart might help
    Restart won’t help
    @SystematicGroup @vitalethomas
    

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20. Demo
    Application Lifecycle
    https://github.com/ThomasVitale/cloud-native-spring-webinar-feb-2021
    @SystematicGroup @vitalethomas
    

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21. 5. Configuration
    @SystematicGroup @vitalethomas
    

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22. Code, Configuration, Credentials
    Code
    Con
    fi
    guration Deploy
    Credentials
    @SystematicGroup @vitalethomas
    

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23. Configuration Strategies
    Spring Boot Properties
    
    
    Property
    fi
    les
    
    
    Command line arguments
    
    
    Environment variables
    Con
    fi
    guration Services
    
    
    Spring Cloud Con
    fi
    g Server
    
    
    Spring Cloud Consul Con
    fi
    g
    
    
    Spring Cloud Vault
    
    
    Spring Cloud Zookeeper Con
    fi
    g
    Cloud Platform Services
    
    
    Spring Cloud Alibaba
    
    
    Spring Cloud AWS
    
    
    Spring Cloud Azure
    
    
    Spring Cloud GCP
    Kubernetes Platform
    
    
    Con
    fi
    gMaps
    
    
    Secrets
    
    
    Environment Variables
    @SystematicGroup @vitalethomas
    

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24. Demo
    Con
    fi
    guration
    https://github.com/ThomasVitale/cloud-native-spring-webinar-feb-2021
    @SystematicGroup @vitalethomas
    

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25. Bonus: GitOps
    @SystematicGroup @vitalethomas
    

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26. GitOps - Cloud Native Operations
    https://www.weave.works/technologies/gitops/
    

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27. Demo
    GitOps
    https://github.com/ThomasVitale/cloud-native-spring-webinar-feb-2021
    @SystematicGroup @vitalethomas
    

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28. GitOps - Configuration
    helm upgrade -i flux fluxcd/flux \
    
    
    --set git.user=$GITHUB_USER \
    
    
    --set git.email=$GITHUB_USER@users.noreply.github.com \
    
    
    --set git.url=git@github.com:$GITHUB_USER/cloud-native-spring-
    webinar-feb-2021 \
    
    
    --set git.path="deployment" \
    
    
    --set git.branch="main" \
    
    
    --namespace flux
    
    
    @SystematicGroup @vitalethomas
    

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29. What’s next?
    @SystematicGroup @vitalethomas
    

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30. II. Dependency
    management
    I. One codebase, one
    application
    III. Con
    fi
    guration,
    credentials, and code
    V. Design, build,
    
    
    release, run
    IV. Backing services
    VI. Stateless
    
    
    processes
    VIII. Concurrency
    VII. Port binding IX. Disposability
    XI. Logs
    X. Environment
    
    
    parity
    XII. Administrative
    processes
    XIV. Telemetry
    XIII. API
    fi
    rst
    XV. Authentication
    and authorization
    Beyond 12-Factors
    

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31. More Spring and Kubernetes
    Resilience
    
    
    Resilience4J
    
    
    Spring Cloud Circuit Breaker
    Distributed systems
    
    
    Spring Cloud Gateway
    
    
    Spring Cloud Stream
    
    
    Spring Security OAuth
    Reactive
    
    
    Spring WebFlux
    
    
    R2DBC
    
    
    Project Reactor
    Kubernetes
    
    
    Spring Boot
    
    
    Spring Cloud Kubernetes
    
    
    Skaffold
    @SystematicGroup @vitalethomas
    

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32. With Spring Boot and Kubernetes
    • 35% discount code, valid for
    all products in all format
    
    • mtpsystematic21
    
    
    • mng.bz/8N5D
    Cloud Native Spring in Action
    www.thomasvitale.com @vitalethomas
    

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33. Thomas Vitale @vitalethomas thomasvitale.com
    Cloud Native
    With Spring Boot and Kubernetes
    Systematic - 10/02/2021
    systematic.com
    

    View Slide