SpringOne 2021 Session Title: Spring Boot—Production Boost Speaker: Thomas Vitale, Senior Software Engineer at Systematic

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

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

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

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

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

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

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

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

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

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

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

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

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

14. Environment Parity
thomasvitale.com @vitalethomas
Testing

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

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

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

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

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
ffi
c to the container

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

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