A project for creating minimal Docker images

The concept of this project is to find all the libraries for running an application or process in a Docker container. This will lead to smaller Docker images so that deploys are faster, disk usage is minimized, and attack surfaces are decreased.

Building a minimal Java Spring Boot application image with the OpenJDK installed on Centos 7

docker build -t centos:java1.8.0_121 -f Dockerfile-java .

rm -rf build-output

docker run --rm -v "${PWD}:/data" -w /data centos:java1.8.0_121 python create_minimal_image.py /usr/lib/jvm/jre

docker build -t minimal-java -f Dockerfile-minimal-java .

docker build -t minimal-spring-boot -f Dockerfile-spring-boot .

or

./build-java.sh

Then to run Spring Boot application:

docker run -p 8080:8080 minimal-spring-boot

Running tests

# create virtualenv if you'd like
pip install -r requirements.txt
py.test