48 lines
1.7 KiB
Docker
48 lines
1.7 KiB
Docker
# ---------- Base build image (pins Gradle + JDK) ----------
|
|
FROM gradle:8.10.2-jdk21-alpine AS build-base
|
|
WORKDIR /workspace
|
|
|
|
# Pre-copy only files that affect dependency resolution
|
|
COPY settings.gradle settings.gradle
|
|
COPY build.gradle build.gradle
|
|
COPY gradlew gradlew
|
|
|
|
# Warm Gradle wrapper & dependency cache (layer-cached in the image)
|
|
RUN ./gradlew --version || gradle --version
|
|
RUN ./gradlew --no-daemon --stacktrace dependencies || true
|
|
|
|
# ---------- Test stage (fail fast but reuse the warmed deps) ----------
|
|
FROM build-base AS test
|
|
# Copy the full project now (invalidates later layers only when code changes)
|
|
COPY . .
|
|
RUN ./gradlew --no-daemon clean test
|
|
|
|
# ---------- Package stage (reuses compiled classes incrementally) ----------
|
|
FROM test AS package
|
|
RUN ./gradlew --no-daemon bootJar
|
|
# Find the built jar path
|
|
RUN ls -lah build/libs
|
|
|
|
# ---------- Runtime image ----------
|
|
FROM eclipse-temurin:21-jre-alpine
|
|
RUN addgroup -S app && adduser -S app -G app
|
|
USER app
|
|
WORKDIR /app
|
|
|
|
# Copy the application jar
|
|
COPY --from=package /workspace/build/libs/*SNAPSHOT*.jar /app/app.jar
|
|
|
|
# Healthcheck via Spring Actuator (optional if you have it)
|
|
# HEALTHCHECK --interval=30s --timeout=3s --start-period=20s --retries=3 \
|
|
# CMD wget -qO- http://localhost:8080/actuator/health/liveness | grep -q '"status":"UP"' || exit 1
|
|
|
|
# Graceful shutdown
|
|
ENV JAVA_OPTS="-XX:+UseContainerSupport -XX:MaxRAMPercentage=75 -XX:InitialRAMPercentage=50"
|
|
ENV SERVER_SHUTDOWN=graceful
|
|
ENV SPRING_LIFECYCLE_TIMEOUT=20s
|
|
|
|
LABEL com.centurylinklabs.watchtower.enable=true
|
|
|
|
EXPOSE 8080
|
|
ENTRYPOINT ["sh","-c","java $JAVA_OPTS -Dserver.shutdown=${SERVER_SHUTDOWN} -Dspring.lifecycle.timeout-per-shutdown-phase=${SPRING_LIFECYCLE_TIMEOUT} -jar /app/app.jar"]
|