Spring Boot: Production Boost

The Spring ecosystem provides you with all you need for building modern applications. In this session, we'll highlight useful features in five areas to get your applications ready for production.

- JVM and Containerization. Producing efficient Spring Boot images with Cloud Native Buildpacks, configuring CPU and memory for the JVM, and handling container resources in Kubernetes.
- Configuration. Avoiding common mistakes when using profiles, planning a configuration strategy using property files, configuration services, and Kubernetes.
- Data Integration. Managing schemas and data with Flyway directly from Spring Boot for imperative and reactive apps.
- Testing. Leveraging sliced tests for targeted integration tests, using mock servers, and relying on Testcontainers for environment parity.
- Monitoring. Configuring health probes for Kubernetes, securing the management endpoints, taking a heap dump, and troubleshooting performance.

Transcript

1. Thomas Vitale
   SpringOne
   Sep 1st, 2021
   Spring Boot: Production Boost
   Boost your journey to production
   @vitalethomas
   

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

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3. thomasvitale.com @vitalethomas
   thomasvitale.com @vitalethomas
   JVM &
   Containers
   Data
   Integration
   Monitoring &
   Management
   Testing Con
   fi
   guration
   

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4. Self-contained applications
   thomasvitale.com @vitalethomas
   JVM &
   Containers
   

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5. Packaging Spring Boot
   JAR & Container Image
   thomasvitale.com @vitalethomas
   JAR
   Container Image
   Gradle
   
   
   bootJar
   Maven
   
   
   spring-boot:repackage
   Gradle
   
   
   bootBuildImage
   Maven
   
   
   spring-boot:build-image
   JVM &
   Containers
   

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6. Configuring Resources for JVM Containers
   CPU & Memory
   thomasvitale.com @vitalethomas
   CPU
   Memory
   When limit hit
   
   
   Throttle
   Compressible
   
   
   Resource
   When limit hit
   
   
   OOMKilled
   Non
   
   
   Compressible
   
   
   Resource
   

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7. Database version control
   thomasvitale.com @vitalethomas
   Data
   Integration
   

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8. Data Integration
   thomasvitale.com @vitalethomas
   Spring Data for Relational Databases
   Spring Data JPA
   ‣JPA & Hibernate
   
   
   ‣Repositories
   
   
   ‣JDBC
   Spring Data JDBC
   ‣DDD Principles
   
   
   ‣Repositories
   
   
   ‣JDBC
   Spring Data R2DBC
   ‣DDD Principles
   
   
   ‣Repositories
   
   
   ‣R2DBC
   Data
   Integration
   

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9. Schema and data management
   Flyway: Version control for your database
   thomasvitale.com @vitalethomas
   SQL Migrations
   
   
   Schema changes
   Java Migrations
   
   
   Data changes
   V1 Init schema
   V2 Add column
   V3 Create table
   V4 Add constraint
   time
   Data
   Integration
   

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10. Externalized configuration
    thomasvitale.com @vitalethomas
    Con
    fi
    guration
    

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11. Configuration Options
    thomasvitale.com @vitalethomas
    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
    Con
    fi
    guration
    

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12. Configuration Strategies
    thomasvitale.com @vitalethomas
    Con
    fi
    guration
    
    
    Properties
    
    
    Property
    fi
    les
    ‣Default values
    
    
    ‣Development
    environment values
    Con
    fi
    guration
    
    
    Service
    
    
    Spring Cloud Con
    fi
    g
    ‣Connection pools
    
    
    ‣Timeouts and retries
    
    
    ‣Feature
    fl
    ags
    
    
    ‣External Services
    (URLs & Passwords)
    Kubernetes
    
    
    Platform
    
    
    Con
    fi
    gMaps & Secrets
    ‣Spring Active Pro
    fi
    les
    
    
    ‣Internal Services
    (URLs & Passwords)
    Con
    fi
    guration
    

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13. ConfigMaps & Secrets
    thomasvitale.com @vitalethomas
    Mount the volume
    
    to the /config path,
    
    where Spring Boot will
    
    automatically read
    
    property
    fi
    les.
    Load the Con
    fi
    gMap
    
    In a volume
    

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14. Environment Parity
    thomasvitale.com @vitalethomas
    Testing
    

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15. Testing Spring Boot
    thomasvitale.com @vitalethomas
    Types of auto tests for Spring Boot applications
    Unit Tests
    ‣JUnit
    
    
    ‣Mockito
    
    
    ‣No Spring context
    Integration Tests
    ‣@SpringBootTest
    
    
    ‣Web server
    
    
    ‣Full Spring context
    Slice Tests
    ‣@SpringWebMvc
    
    
    ‣@SpringDataR2dbc
    
    
    ‣Sliced Spring context
    Testing
    

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16. Testcontainers
    thomasvitale.com @vitalethomas
    Testing with external dependencies
    Docker containers
    Run external
    dependencies as
    
    
    Docker containers
    Data Layer Tests
    Ensure environment
    parity by testing the data
    layer with the real
    database
    Integration Tests
    Use containers for
    databases, message
    queues, and web servers
    Testing
    

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17. Observable applications
    thomasvitale.com @vitalethomas
    Monitoring &
    Management
    

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18. Monitoring and management
    thomasvitale.com @vitalethomas
    Operating applications in production
    Spring Boot Actuator
    ‣Health (liveness and readiness)
    
    
    ‣Metrics (Prometheus, OpenMetrics)
    
    
    ‣Flyway, Thread Dumps, Heap Dumps
    Spring Cloud Sleuth
    ‣Distributed tracing
    
    
    ‣Instrumentation
    
    
    ‣OpenZipkin and OpenTelemetry
    Monitoring &
    Management
    

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19. Liveness and Readiness Probes
    thomasvitale.com @vitalethomas
    When not available,
    
    Kubernetes will restart
    
    the container
    When not ready,
    
    Kubernetes will not send
    
    any tra
    ff
    i
    c to the container
    

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20. thomasvitale.com @vitalethomas
    thomasvitale.com @vitalethomas
    JVM &
    Containers
    Data
    Integration
    Monitoring &
    Management
    Testing Con
    fi
    guration
    

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21. Thomas Vitale
    SpringOne
    Sep 1st, 2021
    Spring Boot: Production Boost
    Boost your journey to production
    @vitalethomas
    

    View Slide