apt-mirror2

apt-mirror2 is the Python/asyncio reimplementation of the apt-mirror - an apt sources mirroring tool.
This project is intended to be a general drop-in apt-mirror replacement.

One of the main advantages of the apt-mirror2 over the apt-mirror is that it never leaves a broken mirror behind, provided it exits with code 0. This is ensured by data integrity checks at all stages of mirroring.

Requirements

Python 3.10 is the minimum supported version. PyPy 3.10 (7.3) is also supported.
For additional dependencies, please refer to the pyproject.toml and/or requirements.txt.

Installation

Container (Docker/Podman)

Container images are available in the Docker Hub under aptmirror/apt-mirror2 repository and in the Red Hat Quay.io under apt-mirror2/apt-mirror2 repository.

Supported architectures: amd64, arm64v8.

You can try them using

docker run -it --rm docker.io/aptmirror/apt-mirror2 --help

or

docker run -it --rm quay.io/apt-mirror2/apt-mirror2 --help

You may wish to use podman command instead of docker.

Image variants

aptmirror/apt-mirror2:latest

aptmirror/apt-mirror2:<version>

Images based on debian:stable image.

aptmirror/apt-mirror2:slim

aptmirror/apt-mirror2:<version>-slim

Images based on debian:stable-slim image.

aptmirror/apt-mirror2:alpine

aptmirror/apt-mirror2:<version>-alpine

Images based on alpine:3 image.

PyPI

PyPI package is available under the name apt-mirror:

pip install apt-mirror
apt-mirror --help

Distro packages

Debian

apt-mirror2 is available in the Debian Unstable (sid). Please note that as of now, apt-mirror2 does not replace apt-mirror in the Debian and thus package provides apt-mirror2 executable and /etc/apt/mirror2.list configuration file.

Packagecloud builds

Debian (bookworm, trixie) and Ubuntu (22.04, 24.04) packages are available in the Packagecloud repository.

Quick automated repository setup:

curl -s https://packagecloud.io/install/repositories/nE0sIghT/apt-mirror2/script.deb.sh | sudo bash

Package installation:

sudo apt-get install apt-mirror2

For manual steps, please refer to the Packagecloud repository.

Build from source with virtualenv

It's possible to use apt-mirror2 from a virtualenv:

# Let's work in the home folder
cd

# Create virtualenv
virtualenv ~/venv/apt-mirror2
source ~/venv/apt-mirror2/bin/activate

# Clone apt-mirror2 source code
git clone https://gitlab.com/apt-mirror2/apt-mirror2
cd apt-mirror2

# Install requirements
pip install -r requirements.txt

# Install apt-mirror2 into virtualenv
python setup.py install

apt-mirror --help

Usage

As the drop-in replacement for the apt-mirror, this project supports same CLI syntax.

usage: apt-mirror [-h] [--version] [configfile]

positional arguments:
  configfile  Path to config file. Default /etc/apt/mirror.list

options:
  -h, --help  show this help message and exit
  --version   Show version

apt-mirror compatibility

Most of apt-mirror configuration directives are supported.
As of now proxy for FTP repositories is not supported.

File lists (ALL, NEW, MD5, SHA256, SHA512) are not written by default, but you can enable them with the write_file_lists option.

In addition there are some enhancements available:

• Non-zero exit code is returned if some of required files were not downloaded due to network or server errors or no repositories were configured.
• Flexible support for filtering by package name, source name, section, or Debtags
• Optional Release files GPG signature verification
• Repositories lacking MD5 hashes are correctly mirrored
• Old index files are properly cleaned and don't produce errors during the mirror processing
• Standard sources.list [ arch=arch1,arch2 ] can be used to specify multiple repository architectures for mirroring.
• Multiple codenames (or flat folders) can be specified using comma as delimiter.
• mirror_path URL PATH option may be used to specify PATH to use for saving mirror files instead of the path that is generated from URL.
• Additional configurations are loaded from the *.list files in the directory named the same as the configfile with the .d suffix. Eg /etc/apt/mirror.list.d/*.list.
• Rate limit is enforced for overall download rate.
• Slow download rate protection is enabled by default and can be configured via mirror.list.
• HTTP user agent can be configured via user_agent configuration.
• Configuration variables are exposed to the postmirror_script.
• by-hash list option can be used to control whether Acquire-By-Hash Release option should be respected or enforced.
• Mirror wipe protection is available and configurable via wipe_size_ratio and wipe_count_ratio settings.
• Per-repository log files are available in the var_path folder
• The dists folder is replaced almost atomically using move instead of copy/link
• Native Prometheus metrics are supported

Common problems

LocalProtocolError: Max outbound streams is n, n open

This warning may appear with HTTP2 mirrors when you have too much nthreads configured. You may either lower nthreads value or disable http2 via http2-disable option. As of now, apt-mirror2 has no control over HTTP2 concurrent streams value used by httpx/h2 client, but does limit the count of simultaneously downloaded files (which can still exceed maximum outbound streams due to unknown reasons).

RuntimeError: can't start new thread

Long story short: upgrade Docker.

Look to this issue for more solutions.

dists folder is missing after running apt-mirror2

This is usually a result of errors in your source mirror. You should see some warnings either about missing files in the source or problems with metadata files. There should be a Metadata movement skipped because of download errors message in the log file and apt-mirror2 should exit with non-zero code.

You could try to change your mirror source, report this problem to the mirror owner, or increase the timeouts in your mirror.list.

License

GNU General Public License v3.0 or later