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Dockerfile
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Dockerfile
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# docker build -t ricky/spring-java-ubuntu:latest .
FROM ubuntu:bionic
MAINTAINER Ricky Chen <809155736@qq.com>
#get package list
RUN apt-get update
#default time zone
ENV TZ=UTC
#java home
ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64
# install java
RUN apt-get install -y openjdk-8-jdk
# show the java info
RUN java -version
# from spring boot guide https://spring.io/guides/gs/spring-boot-docker/#initial
VOLUME /tmp
# default direcoty for application
RUN mkdir /app
WORKDIR /app
# clean up
RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* && apt-get autoremove
# environment variables
# jar name, can be passed from docker compose or docker lunch command
ENV JAR_NAME "spring-boot.jar"
ENV JAVA_OPTIONS=''
# entry point
ENTRYPOINT ["sh", "-c", "java ${JAVA_OPTIONS} -jar /app/${JAR_NAME}"]