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NP-DK04: Build Image for Springboot App

Project Overview

Create an optimized container image for a Java Spring Boot voting service, focusing on JVM optimization and efficient resource utilization.

Service Details​

Service Configuration
{
    "path": "/voting",
    "language": "Java",
    "framework": "Spring Boot",
    "port": 8080,
    "build": "mvn package",
    "launch": ["java", "-jar", "app.jar"]
}

Technical Requirements​

Prerequisites​

  • Docker installed locally
  • Git for version control
  • Basic Java/Spring knowledge
  • Maven understanding
  • IDE or text editor
  • GitHub account
Base Repository

https://github.com/craftista/craftista

Implementation Requirements​

☕ Java-Specific Considerations​

  • JVM optimization settings
  • Spring Boot configuration
  • Maven dependency management
  • JAR file handling

🔒 Security Measures​

  • Minimal JRE base image
  • Non-root user execution
  • Secure dependency management
  • Spring Security configuration

⚡ Optimization Requirements​

  • Multi-stage build implementation
  • Maven dependency caching
  • Layer optimization
  • JVM tuning parameters
Important Considerations
  • Spring profiles configuration
  • Environment variables handling
  • Health check implementation
  • Development workflow setup

Community Learning​

Weekly Schedule​

  • Monday: New project release
  • Thursday: Live Build Session on [YouTube Channel Link]
    • Java containerization demo
    • Spring Boot best practices
    • Interactive Q&A

Share Your Work​

Join the learning community on r/devopsbuilders:

  • Use "Devops Buildcamp" flair
  • Include PR-DK04 in post title
  • Share your approach
  • Discuss Java containerization
  • Help others learn
Remember

Share your Java containerization insights and learn from the community!

Reference Commands​

Build & Run Commands
# Build the application
mvn package

# Launch the application
java -jar app.jar

# Default port
8080

Best Practices Implementation Guide​

Java Container Setup​

Example Multi-Stage Structure
# Build stage
FROM maven:3.8.4-openjdk-17 AS builder
WORKDIR /app
COPY pom.xml .
RUN mvn dependency:go-offline
COPY src ./src
RUN mvn package -DskipTests

# Production stage
FROM eclipse-temurin:17-jre-alpine
WORKDIR /app
COPY --from=builder /app/target/*.jar app.jar
USER nobody
ENTRYPOINT ["java", "-jar", "app.jar"]
Pro Tip

Remember to optimize your JVM settings and Spring Boot configuration for containerized environments!