signaling_server/src/main/docker/Dockerfile.java8 at master · fabri1983/signaling_server · GitHub

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# Dockerfile for Java 8 platform

######################################################################################################
FROM adoptopenjdk/openjdk8:x86_64-alpine-jre8u265-b01 AS STAGING-APP
ARG DEPENDENCIES=docker-workdir

RUN mkdir -p /staging/app/

# Stage dependencies and classes
COPY ${DEPENDENCIES}/META-INF             /staging/app/META-INF
COPY ${DEPENDENCIES}/BOOT-INF             /staging/app/BOOT-INF
COPY ${DEPENDENCIES}/run-java.sh          /staging/app/

# Assign execution permission to fabric8's run-java.sh script
RUN chmod 755 /staging/app/run-java.sh


######################################################################################################
FROM adoptopenjdk/openjdk8:x86_64-alpine-jre8u265-b01
ARG JAVA_MAIN_CLASS

# JAVA_HOME needs to be set:
#   adoptopenjdk: /opt/java/openjdk
#   zulu: /usr/lib/jvm/zulu-8

ENV ENV_JAVA_MAIN_CLASS=${JAVA_MAIN_CLASS} \
    JAVA_HOME=/opt/java/openjdk

ENV PATH="$PATH:$JAVA_HOME/bin"

# Copy staged decompressed JAR from previous stage
COPY --from=STAGING-APP /staging/app  /app

# Using CMD so it can be overwritten from outside
CMD java -cp /app/BOOT-INF/classes:/app/BOOT-INF/lib/* ${ENV_JAVA_MAIN_CLASS}

# Using fabric8's run-java.sh
#CMD JAVA_OPTIONS="${JAVA_OPTS} ${ENV_JAVA_MODULES_FOR_HAZELCAST}" \
#    JAVA_APP_DIR=/app \
#    JAVA_CLASSPATH=/app/BOOT-INF/classes:/app/BOOT-INF/lib/* \
#    JAVA_MAIN_CLASS=${ENV_JAVA_MAIN_CLASS} \
#    sh /app/run-java.sh