using-jlink-to-create-smaller-docker-images-for-your-spring-boot-java-application

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using-jlink-to-create-smaller-docker-images-for-your-spring-boot-java-application

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Originally posted by Pierre-Marin Leclercq on September 29, 2023 in Foojay.io Discussions.

In the past we tried using this solution but we had a lot of issues with module dependency hell with code like that :

FROM scp-dtr-01.sma.lan/base/openjdk:17-2-ci as builder
WORKDIR app
ARG JAR_FILE=build/libs/ri-svc.jar
COPY ${JAR_FILE} application.jar
RUN java -Djarmode=layertools -jar application.jar extract
RUN jdeps \
–class-path ‘dependencies/BOOT-INF/lib/*:application/*’ \
–print-module-deps \
–ignore-missing-deps \
–module-path ‘dependencies/BOOT-INF/lib/jakarta.annotation-api-1.3.5.jar:dependencies/BOOT-INF/lib/slf4j-api-1.7.31.jar’ \
–recursive \
–multi-release 9 \
-quiet \
application dependencies/BOOT-INF/lib/* > deps.lst
RUN cat deps.lst
RUN jlink –add-modules $(cat deps.lst) –add-modules jdk.crypto.ec –add-modules jdk.crypto.cryptoki –compress 2 –strip-debug –no-header-files –no-man-pages –output app-jre

We had to specify specifics modules dependency (here crypto or annotation or slf4j)

So we stopped using this “optimisation” because it was not robust, is this more efficient now ?