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Linux container from scratch in Go using Ubuntu 22.04 rootfs.

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# Focker

Focker is a toy container runtime written in Go, designed to create and manage lightweight Linux containers.

## Features

- Namespace Isolation: Uses Linux namespaces to isolate processes, mount points, and hostname.
- Filesystem Handling: Extracts a base Ubuntu 22.04 filesystem tarball for container use.
- Process Management: Runs specified commands inside isolated containers.
- Bind Mounts: Easy file and directory sharing between host and containers

## Requirements

- Go (tested with go1.21.5)
- Linux kernel with support for namespaces (tested on Ubuntu 22.04, Pop!\_OS)
- Requires root privileges to operate due to its use of Linux namespaces.

## Usage

1. Building

```bash
   go build -o focker
   ```

2. Running Containers
   ```bash
   sudo ./focker run <command> [args...]
   ```

## Resources

- [Containers From Scratch • Liz Rice • GOTO 2018](https://www.youtube.com/watch?v=8fi7uSYlOdc)
- [Ubuntu 22.04 Base (rootfs)](https://cdimage.ubuntu.com/ubuntu-base/releases/22.04/release/)
- [pivot_root(2) — Linux manual page](https://man7.org/linux/man-pages/man2/pivot_root.2.html)

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