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Upgrade Dockerfile to JDK 25 and Scala 3.8.2

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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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davidtio
2026-02-28 13:35:31 +08:00
parent 93e8401ed3
commit 2a7c3151eb
1 changed files with 16 additions and 13 deletions
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@@ -1,39 +1,42 @@
# === Build stage === # === Build stage ===
FROM eclipse-temurin:17 AS build # Updated to JDK 25 for better performance and longer support
FROM eclipse-temurin:25-jdk AS build
# Install sbt # Modern GPG handling & sbt install
RUN apt-get update && apt-get install -y curl gnupg && \ RUN apt-get update && apt-get install -y curl gnupg && \
curl -sL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x2EE0EA64E40A89B84B2DF73499E82A75642AC823" | gpg --dearmor > /etc/apt/trusted.gpg.d/sbt.gpg && \
echo "deb https://repo.scala-sbt.org/scalasbt/debian all main" > /etc/apt/sources.list.d/sbt.list && \ echo "deb https://repo.scala-sbt.org/scalasbt/debian all main" > /etc/apt/sources.list.d/sbt.list && \
curl -sL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x2EE0EA64E40A89B84B2DF73499E82A75642AC823" | apt-key add && \
apt-get update && apt-get install -y sbt && \ apt-get update && apt-get install -y sbt && \
rm -rf /var/lib/apt/lists/* rm -rf /var/lib/apt/lists/*
WORKDIR /app WORKDIR /app
# Cache dependency resolution # Optimization: Copy ALL build definitions first
# This ensures caching works if your source code changes but dependencies don't.
COPY build.sbt . COPY build.sbt .
COPY project/build.properties project/ COPY project/*.sbt project/*.properties project/*.scala project/
COPY project/plugins.sbt project/
RUN sbt update RUN sbt update
# Copy source and build fat JAR # Build the assembly (Fat JAR)
COPY src/ src/ COPY src/ src/
RUN sbt assembly RUN sbt "set test in assembly := false" assembly
# === Runtime stage === # === Runtime stage ===
FROM eclipse-temurin:17-jre-alpine # Updated to the latest JRE 25 on Alpine
FROM eclipse-temurin:25-jre-alpine
# Security: Create a non-root user
RUN addgroup -S app && adduser -S app -G app RUN addgroup -S app && adduser -S app -G app
WORKDIR /app WORKDIR /app
COPY --from=build /app/target/scala-3.7.1/demoapp.jar ./demoapp.jar # Adjust path for Scala 3.8.2
COPY --from=build --chown=app:app /app/target/scala-3.8.2/demoapp.jar ./demoapp.jar
RUN chown -R app:app /app
USER app USER app
EXPOSE 8080 EXPOSE 8080
# Optimization: Use cgroup-aware RAM limits
ENV PORT=8080 ENV PORT=8080
ENV JAVA_OPTS="-XX:MaxRAMPercentage=75.0 -XX:+UseSerialGC" ENV JAVA_OPTS="-XX:MaxRAMPercentage=75.0 -XX:+UseContainerSupport -XX:+ExitOnOutOfMemoryError"
ENTRYPOINT ["sh", "-c", "exec java $JAVA_OPTS -jar demoapp.jar"] ENTRYPOINT ["sh", "-c", "exec java $JAVA_OPTS -jar demoapp.jar"]