第一个Dockerfile(从ubuntu基础镜像上构建java8的docker镜像)

FROM daocloud.io/library/ubuntu:14.04.5
MAINTAINER "jaychang"<[email protected]>
ADD jdk-8u92-linux-x64.gz /usr/local/
RUN ln -s /usr/local/jdk1.8.0_92 /usr/local/jdk
ENV JAVA_HOME /usr/local/jdk
ENV JRE_HOME $JAVA_HOME/jre
ENV CLASSPATH .:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
ENV PATH $JAVA_HOME/bin:$JRE_HOME/bin:$PATH
CMD /usr/local/jdk/bin/java -version