Category: Performance Optimization

May 22, 2021

How to do JVM performance analysis in docker container?

1. Prerequisite Java application with docker based on JDK 8 and alpine. This app is a Jhipster application. Dockerfile:

FROM openjdk:8-jre-alpine

ENV SPRING_OUTPUT_ANSI_ENABLED=ALWAYS \
    JHIPSTER_SLEEP=0 \
    JAVA_OPTS=""

# Add a jhipster user to run our application so that it doesn't need to run as root
RUN adduser -D -s /bin/sh jhipster
WORKDIR /home/jhipster

ADD entrypoint.sh entrypoint.sh
RUN chmod 755 entrypoint.sh && chown jhipster:jhipster entrypoint.sh
USER jhipster

ENTRYPOINT ["./entrypoint.sh"]

EXPOSE 18082 5701/udp

ADD *.jar app.jar

FROM openjdk:8-jre-alpine

ENV SPRING_OUTPUT_ANSI_ENABLED=ALWAYS \

JHIPSTER_SLEEP=0 \

JAVA_OPTS=""

# Add a jhipster user to run our application so that it doesn't need to run as root

RUN adduser -D -s /bin/sh jhipster

WORKDIR /home/jhipster

ADD entrypoint.sh entrypoint.sh

RUN chmod 755 entrypoint.sh && chown jhipster:jhipster entrypoint.sh

USER jhipster

ENTRYPOINT ["./entrypoint.sh"]

EXPOSE 18082 5701/udp

ADD *.jar app.jar

entrypoint.sh

#!/bin/sh

echo "The application will start in ${JHIPSTER_SLEEP}s..." && sleep ${JHIPSTER_SLEEP}
exec java ${JAVA_OPTS} -Djava.security.egd=file:/dev/./urandom -Xdebug -Xrunjdwp:server=y,transport=dt_socket,address=5005,suspend=n -jar "${HOME}/app.jar" "$@"

#!/bin/sh

echo "The application will start in ${JHIPSTER_SLEEP}s..." && sleep ${JHIPSTER_SLEEP}

exec java ${JAVA_OPTS} -Djava.security.egd=file:/dev/./urandom -Xdebug -Xrunjdwp:server=y,transport=dt_socket,address=5005,suspend=n -jar "${HOME}/app.jar" "$@"

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Category: Performance Optimization

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