Sample Dockerfile jar project

Dockerfile

FROM ubuntu:trusty

# Port mapping
EXPOSE 8080

# Install oracle-java8
RUN \
  apt-get install -y software-properties-common && \
  add-apt-repository -y ppa:webupd8team/java && \
  apt-get update && \
  echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | debconf-set-selections && \
  apt-get install -y oracle-java8-installer && \
  rm -rf /var/lib/apt/lists/* && \
  rm -rf /var/cache/oracle-jdk8-installer

# Define commonly used JAVA_HOME variable
ENV JAVA_HOME /usr/lib/jvm/java-8-oracle

# Define project name
ENV PROJECT_NAME bravo

# Environment variables
# `S3_WEB_KEY_PLACEHOLDER` is replaced by Jenkins etc...
ENV WORK_DIR=/opt/${PROJECT_NAME} \
    S3_WEB_KEY=S3_WEB_KEY_PLACEHOLDER

# Goto jars dir
WORKDIR ${WORK_DIR}/jars

# Install requirements
RUN apt-get update && apt-get install wget curl -y
RUN curl --silent --show-error --retry 5 https://bootstrap.pypa.io/get-pip.py | python3 && pip install awscli

# Download AspectJ Weaver jar
RUN wget http://central.maven.org/maven2/org/aspectj/aspectjweaver/1.7.4/aspectjweaver-1.7.4.jar

# AWS Credential
ENV AWS_ACCESS_KEY_ID key_id
ENV AWS_SECRET_ACCESS_KEY access_key

# Download fat jar
# This AWS credential is only valid in this fs layer.
RUN AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID \
    AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY \
    aws s3 cp s3://${PROJECT_NAME}-releases/${S3_WEB_KEY} ${PROJECT_NAME}-web.jar

WORKDIR ${WORK_DIR}/scripts
COPY scripts/startup.sh ./

CMD ["/opt/${PROJECT_NAME}/scripts/startup.sh"]