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minimal-docker-image-maker's Introduction

A project for creating minimal Docker images

Build Status

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

minimal-docker-image-maker's People

Contributors

williamsbdev avatar brenton-trility avatar

Stargazers

Roy Cohen avatar Juwan avatar avatar Brenton Rothchild avatar Toran Billups avatar Nicholas Koza avatar

Watchers

Brenton Rothchild avatar James Cloos avatar

Forkers

eblackey brentonr

minimal-docker-image-maker's Issues

Multiple symlinked copies of JRE are in final docker image

The create_minimal_image.py script will find binaries in any location under /usr/lib/jvm, which includes several symlinked copies of the jre installed.

These copies are created as full files instead of symlinks in the target Dockerfile-minimal image via the build-output directory.

Because these copies aren't used, instead use only the /usr/lib/jvm/jre directory, causing only one copy to be included in build-output.

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