stefan
128 lines
5.7 KiB
Docker
128 lines
5.7 KiB
Docker
# =============================================================================
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# Multi-stage Dockerfile for Meldestelle API Gateway
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# Optimized for security, performance, and maintainability
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# =============================================================================
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# =============================================================================
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# Build stage - Extract JAR layers for better caching
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# =============================================================================
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FROM eclipse-temurin:21-jre-alpine AS builder
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# Set working directory for build operations
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WORKDIR /builder
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# Copy the gateway JAR file for layer extraction
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COPY infrastructure/gateway/build/libs/*.jar app.jar
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# Extract JAR layers for optimized Docker layer caching
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# This allows Docker to cache dependencies separately from application code
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RUN java -Djarmode=layertools -jar app.jar extract
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# =============================================================================
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# Runtime stage - Optimized production image
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# =============================================================================
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FROM eclipse-temurin:21-jre-alpine AS runtime
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# =============================================================================
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# Metadata and Build Information
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# =============================================================================
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LABEL maintainer="Meldestelle Team <support@meldestelle.at>"
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LABEL description="Self-Contained Systems API Gateway for Austrian Equestrian Federation"
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LABEL version="1.0.0"
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LABEL org.opencontainers.image.title="Meldestelle Gateway"
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LABEL org.opencontainers.image.description="Spring Cloud Gateway with Circuit Breaker, Health Monitoring, and Service Discovery"
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LABEL org.opencontainers.image.vendor="Meldestelle"
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LABEL org.opencontainers.image.version="1.0.0"
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LABEL org.opencontainers.image.created="2025-08-14"
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LABEL org.opencontainers.image.source="https://github.com/meldestelle/api-gateway"
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LABEL org.opencontainers.image.documentation="https://api.meldestelle.at/docs"
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# =============================================================================
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# Security and System Setup
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# =============================================================================
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# Install curl for health checks and security updates
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RUN apk update && \
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apk add --no-cache curl ca-certificates tzdata && \
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apk upgrade && \
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rm -rf /var/cache/apk/*
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# Create dedicated non-root user with specific UID/GID for security
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RUN addgroup -g 1001 -S gateway && \
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adduser -u 1001 -S gateway -G gateway -s /bin/sh
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# Set timezone for consistent logging and operations
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ENV TZ=Europe/Vienna
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# =============================================================================
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# Application Setup
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# =============================================================================
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# Set working directory
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WORKDIR /app
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# Copy Spring Boot layers in optimal order for Docker layer caching
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# Dependencies change less frequently than application code
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COPY --from=builder --chown=gateway:gateway /builder/dependencies/ ./
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COPY --from=builder --chown=gateway:gateway /builder/spring-boot-loader/ ./
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COPY --from=builder --chown=gateway:gateway /builder/snapshot-dependencies/ ./
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COPY --from=builder --chown=gateway:gateway /builder/application/ ./
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# =============================================================================
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# Runtime Configuration
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# =============================================================================
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# Switch to non-root user for security
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USER gateway
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# Expose application port
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EXPOSE 8080
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# =============================================================================
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# JVM and Application Configuration
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# =============================================================================
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# Optimized JVM settings for containerized Spring Boot reactive applications
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ENV JAVA_OPTS="-server \
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-Xmx512m \
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-Xms256m \
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-XX:+UseG1GC \
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-XX:+UseContainerSupport \
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-XX:MaxRAMPercentage=75.0 \
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-XX:+UnlockExperimentalVMOptions \
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-XX:+UseCGroupMemoryLimitForHeap \
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-Djava.security.egd=file:/dev/./urandom \
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-Djava.awt.headless=true \
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-Dfile.encoding=UTF-8 \
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-Duser.timezone=Europe/Vienna"
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# Spring Boot specific optimizations
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ENV SPRING_PROFILES_ACTIVE=prod
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ENV SERVER_PORT=8080
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ENV MANAGEMENT_ENDPOINTS_WEB_EXPOSURE_INCLUDE=health,info,metrics,prometheus
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# =============================================================================
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# Health Check Configuration
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# =============================================================================
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# Comprehensive health check with proper timing for Spring Boot startup
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HEALTHCHECK --interval=30s --timeout=15s --start-period=90s --retries=3 \
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CMD curl -f -s http://localhost:8080/actuator/health | grep -q '"status":"UP"' || exit 1
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# =============================================================================
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# Application Startup
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# =============================================================================
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# Run the application with optimized settings and proper signal handling
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ENTRYPOINT ["sh", "-c", "exec java $JAVA_OPTS org.springframework.boot.loader.launch.JarLauncher"]
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# =============================================================================
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# Documentation
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# =============================================================================
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# Build commands:
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# docker build -t meldestelle/gateway:latest -f infrastructure/gateway/Dockerfile .
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# docker run -p 8080:8080 --name gateway meldestelle/gateway:latest
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#
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# Key optimizations:
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# - Multi-stage build with JAR layer extraction for better caching
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# - Non-root user execution for security
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# - Optimized JVM settings for containers
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# - Comprehensive health checks
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# - Proper timezone and encoding configuration
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# - Security updates and minimal attack surface
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# =============================================================================
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