copatcher

Introduction

copatcher is a container patcher written in Go.

Prerequisites

• Go >= 1.18.0

Install

# container-diff
curl -LO https://storage.googleapis.com/container-diff/latest/container-diff-linux-amd64
chmod +x container-diff-linux-amd64
sudo install container-diff-linux-amd64 /usr/local/bin/container-diff

# buildkit
docker pull moby/buildkit:latest

Update

# Install packages
docker run -it --rm --name ubuntu-22.04-container ubuntu:22.04 /bin/bash

$ apt update && \
  apt install tmux && \
  apt install python3-pip && \
  apt install nodejs && \
  apt install npm && \
  npm install -g eslint && \
  pip install flake8

# Run Commit
docker commit -m "Create new image from container's changes" \
  ubuntu-22.04-container ubuntu:22.04-updated

Run

# Run container-diff
container-diff diff --type=apt --type=node --type=pip --json \
  daemon://ubuntu:22.04 daemon://ubuntu:22.04-updated > report.json

# Run buildkit
docker run --detach --rm --privileged --name buildkitd \
  --entrypoint buildkitd moby/buildkit:latest
# OR
docker run --detach --rm --privileged -p 127.0.0.1:8888:8888/tcp --name buildkitd \
  --entrypoint buildkitd moby/buildkit:latest --address tcp://0.0.0.0:8888

# Run copatcher
version=latest make build
./bin/copatcher --image ubuntu:22.04 --report report.json --tag 22.04-patched --timeout "5m" \
  --address "docker-container://buildkitd" --ignore-errors
# OR
./bin/copatcher --image ubuntu:22.04 --report report.json --tag 22.04-patched --timeout "5m" \
  --address "tcp://0.0.0.0:8888" --ignore-errors

Docker

version=latest make docker
docker run ghcr.io/craftslab/copatcher:latest [options]

Usage

usage: copatcher --image=IMAGE --report=REPORT --tag=TAG [<flags>]

Container patcher


Flags:
  --[no-]help           Show context-sensitive help (also try --help-long and --help-man).
  --[no-]version        Show application version.
  --address="unix:///run/buildkit/buildkitd.sock"
                        Address of buildkitd service
  --[no-]ignore-errors  Ignore errors and continue patching
  --image=IMAGE         Application image name and tag to patch
  --report=REPORT       Report file generated by container-diff
  --tag=TAG             Tag for the patched image
  --timeout="5m"        Timeout for the operation

Design

License

Project License can be found here.

Reference

• container-diff
• copacetic
• dockerfile-generator