stefan
144 lines
4.9 KiB
Docker
144 lines
4.9 KiB
Docker
# syntax=docker/dockerfile:1.7
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# ===================================================================
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# Optimized Dockerfile for Spring Boot Ping Service
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# Features: Multi-stage build, security hardening, monitoring support
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# ===================================================================
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# Build arguments for flexibility
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ARG GRADLE_VERSION=8.14
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ARG JAVA_VERSION=21
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ARG ALPINE_VERSION=3.19
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ARG SPRING_PROFILES_ACTIVE=default
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# Build stage: compile the ping-service JAR inside Docker
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FROM gradle:${GRADLE_VERSION}-jdk${JAVA_VERSION}-alpine AS builder
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# Add metadata labels
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LABEL stage=builder
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LABEL service=ping-service
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LABEL maintainer="Meldestelle Development Team"
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WORKDIR /workspace
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# Optimize Gradle build settings for containerized builds
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ENV GRADLE_OPTS="-Dorg.gradle.caching=true \
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-Dorg.gradle.daemon=false \
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-Dorg.gradle.parallel=true \
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-Dorg.gradle.configureondemand=true \
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-Xmx2g"
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# Copy gradle wrapper and configuration files first for optimal caching
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COPY gradlew gradlew.bat gradle.properties settings.gradle.kts ./
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COPY gradle/ gradle/
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# Copy platform dependencies (changes less frequently)
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COPY platform/ platform/
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# Copy root build configuration
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COPY build.gradle.kts ./
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# Copy ping-service specific files last (changes most frequently)
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COPY temp/ping-service/build.gradle.kts temp/ping-service/
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COPY temp/ping-service/src/ temp/ping-service/src/
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# Download and cache dependencies in a separate layer
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RUN ./gradlew :temp:ping-service:dependencies --no-daemon --info
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# Build the application with optimizations
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RUN ./gradlew :temp:ping-service:bootJar --no-daemon --info \
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-Pspring.profiles.active=${SPRING_PROFILES_ACTIVE}
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# ===================================================================
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# Runtime stage: optimized JRE image for production
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# ===================================================================
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FROM eclipse-temurin:${JAVA_VERSION}-jre-alpine AS runtime
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# Add comprehensive metadata
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LABEL service="ping-service" \
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version="1.0.0" \
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description="Microservice demonstrating circuit breaker patterns and monitoring" \
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maintainer="Meldestelle Development Team" \
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java.version="${JAVA_VERSION}" \
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spring.profiles.active="${SPRING_PROFILES_ACTIVE}" \
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build.date="${BUILD_DATE:-$(date -u +'%Y-%m-%dT%H:%M:%SZ')}"
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# Build arguments for runtime configuration
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ARG APP_USER=appuser
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ARG APP_GROUP=appgroup
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ARG APP_UID=1001
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ARG APP_GID=1001
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# Set working directory
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WORKDIR /app
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# Update Alpine packages and install required tools
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RUN apk update && \
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apk upgrade && \
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apk add --no-cache \
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curl \
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jq \
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tzdata && \
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rm -rf /var/cache/apk/*
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# Create non-root user with specific UID/GID for better security
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RUN addgroup -g ${APP_GID} -S ${APP_GROUP} && \
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adduser -u ${APP_UID} -S ${APP_USER} -G ${APP_GROUP} -h /app -s /bin/sh
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# Create required directories with proper permissions
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RUN mkdir -p /app/logs /app/tmp && \
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chown -R ${APP_USER}:${APP_GROUP} /app
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# Copy the built JAR from builder stage with proper ownership
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COPY --from=builder --chown=${APP_USER}:${APP_GROUP} \
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/workspace/temp/ping-service/build/libs/*.jar app.jar
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# Switch to non-root user
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USER ${APP_USER}
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# Expose application port and debug port
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EXPOSE 8082 5005
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# Enhanced health check with better configuration
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HEALTHCHECK --interval=15s --timeout=3s --start-period=40s --retries=3 \
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CMD curl -fsS --max-time 2 http://localhost:8082/actuator/health/readiness || exit 1
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# Optimized JVM settings for Spring Boot 3.x with monitoring support
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ENV JAVA_OPTS_BASE="-XX:MaxRAMPercentage=80.0 \
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-XX:+UseG1GC \
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-XX:+UseStringDeduplication \
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-XX:+UseContainerSupport \
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-XX:+OptimizeStringConcat \
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-XX:+UseCompressedOops \
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-Djava.security.egd=file:/dev/./urandom \
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-Dspring.jmx.enabled=false \
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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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# Monitoring and observability settings
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ENV JAVA_OPTS_MONITORING="-Dmanagement.endpoints.web.exposure.include=health,info,metrics,prometheus \
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-Dmanagement.endpoint.health.show-details=always \
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-Dmanagement.metrics.export.prometheus.enabled=true"
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# Development/debugging options (enabled via environment variables)
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ENV JAVA_OPTS_DEBUG="-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5005"
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# Combined JAVA_OPTS (debug options only applied if DEBUG=true)
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ENV JAVA_OPTS="${JAVA_OPTS_BASE} ${JAVA_OPTS_MONITORING}"
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# Spring Boot configuration
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ENV SPRING_OUTPUT_ANSI_ENABLED=ALWAYS \
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SPRING_PROFILES_ACTIVE=${SPRING_PROFILES_ACTIVE} \
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SERVER_PORT=8082 \
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LOGGING_LEVEL_ROOT=INFO
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# Optimized entrypoint with conditional debug support
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ENTRYPOINT ["sh", "-c", "\
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if [ \"${DEBUG:-false}\" = \"true\" ]; then \
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echo 'Starting application in DEBUG mode on port 5005...'; \
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exec java ${JAVA_OPTS} ${JAVA_OPTS_DEBUG} -jar app.jar; \
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else \
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exec java ${JAVA_OPTS} -jar app.jar; \
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fi"]
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