docker-optimizer 1.1.0

A small program to optimize Dockerfiles

docker-optimizer allows collapsing multiple RUN layers into a single one. This way, you can use the docker caching for development, yet get fewer layers for the final container.

Installation

pip install docker-optimizer

Usage

Input Dockerfile.dev:

FROM python:3.8-slim-buster

#============================================================================
# Install requirements
#============================================================================
COPY requirements.txt /requirements.txt
RUN pip install -r /requirements.txt

#============================================================================
# Update the package list
#============================================================================
RUN apt-get update -y

#============================================================================
# Install certbot
#============================================================================
RUN apt-get install -y curl && \
    curl -LO https://dl.eff.org/certbot-auto && \
    mv certbot-auto /usr/local/bin && \
    chown root /usr/local/bin/certbot-auto && \
    chmod 755 /usr/local/bin/certbot-auto && \
    certbot-auto --install-only -n

#============================================================================
# cleanup package list
#============================================================================
RUN rm -rf /var/lib/apt/lists/*

COPY new-certificate* /usr/local/bin/

USER 1000
ENV LE_AUTO_SUDO=
WORKDIR /usr/local/bin
ENTRYPOINT ["python", "new-certificate.py"]

docker-optimizer Dockerfile.dev Dockerfile

# compiled by docker-optimizer
# https://github.com/bmustiata/docker-optimizer
from python:3.8-slim-buster
copy requirements.txt /requirements.txt
run pip install -r /requirements.txt && apt-get update -y && apt-get install -y curl &&     curl -LO https://dl.eff.org/certbot-auto &&     mv certbot-auto /usr/local/bin &&     chown root /usr/local/bin/certbot-auto &&     chmod 755 /usr/local/bin/certbot-auto &&     certbot-auto --install-only -n && rm -rf /var/lib/apt/lists/*
copy new-certificate* /usr/local/bin/
user 1000
env 'LE_AUTO_SUDO' ''
workdir /usr/local/bin
entrypoint ['python', 'new-certificate.py']