dynker

Multiple docker images builder handling inter images dependencies

Install

Install the tool by launching python setup.py install as root or python setup.py install --user If you do not have root acces or do not want to bother your co-workers on the same host

Use

The purpose of this tool is to build docker images taking care of image dependencies. Meaning, myimage has a FROM parent appears in a Dockerfile, if parent is known as buildable by the tool, it will be built prior to myimage build

The followings are also handled:

• Tag the built images with the last commit hash on the build context
• On-the-fly update of the FROM directives to get the latest build tag
• Dockerfiles are pre-processed in order to purge apt/yum caches after install (https://docs.docker.com/engine/articles/dockerfile_best-practices)
• Dockerfiles are pre-processed in order to work-arround yum bug with overlay driver (see moby/moby#10180 and https://bugzilla.redhat.com/show_bug.cgi?id=1213602#c13)

Example

~/.dynker/config.yml

---
images:
    -
        path: docker/*
    -
        path: /home/username/git/otherrepo/
        Dockerfile: docker/*/Dockerfile

docker/dev/Dockerfile

FROM prod
ADD  requirements-dev.txt /tmp/requirements-dev.txt
RUN  pip install -r /tmp/requirements-dev.txt
RUN  py.test tests

docker/prod/Dockerfile

FROM base
ADD  requirements.txt /tmp/requirements.txt
RUN  pip install -r /tmp/requirements.txt
ADD  mylib /usr/local/lib/python3.5/site-packages/mylib

/home/username/git/otherrepo/docker/base/Dockerfile

FROM python:3.5-alpine
RUN  apk update && apk add my-company-package

Then, dynker build dev will :

1. build the base image from its sources
2. build the production image from its sources
3. build the development image