# Fewbytes/rubber-docker

A workshop on Linux containers: Rebuild Docker from Scratch

Repository: https://github.com/Fewbytes/rubber-docker
Canonical: https://ross.abutalabs.com/products/rubber-docker
Language: Python
License: MIT
License Family: permissive
Last push: 2024-07-28T14:28:42+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3856, "days_push": 766, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3247, forks 261 (observed 2026-08-28T04:07:51.802105+00:00)

## What it is
A hands-on workshop that teaches how Linux containers work by guiding participants to rebuild Docker from scratch in Python, level by level. It covers namespaces, cgroups, chroot/pivot_root, and capabilities using a custom C extension exposing raw syscalls.

## Use cases
- learn how Linux containers work internally
- understand namespaces and cgroups hands-on
- rebuild Docker from scratch as an exercise
- prepare for a containers workshop or training session
- teach container internals to a DevOps team
- study syscalls like chroot and pivot_root in practice

## When to choose
- you want deep, practical understanding of container internals rather than just using Docker
- you are running or attending a hands-on workshop on Linux containers
- you learn best by building things from scratch

## When to avoid
- you need a production container runtime or Docker replacement
- you want a quick tutorial rather than a multi-level guided workshop
- you are not comfortable with low-level Linux system calls or C-extended Python

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: developer-tools, container-runtime
- domain: operating-systems, developer-tools, tutorials
- platform: python, cli
- tags: workshop, containers-from-scratch, namespaces, cgroups, hands-on-learning, docker-internals, education, containers, linux

## Member repositories
- Fewbytes/rubber-docker (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:51.802105+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:24:27.900020+00:00, confidence not recorded.
  - readme: https://github.com/Fewbytes/rubber-docker (fetched 2026-08-28T04:07:51.802105+00:00, sha 1bd53c21c7e6)
- Data as of 2026-08-30T08:39:29.467469+00:00.