Metadata-Version: 2.0
Name: gitlab-registry-cleanup
Version: 0.1.0
Summary: A tool to clean up untagged GitLab registry images.
Home-page: https://github.com/sciapp/gitlab-registry-cleanup
Author: Ingo Heimbach
Author-email: i.heimbach@fz-juelich.de
License: MIT
Keywords: Git,GitLab,Docker,Registry,Cleanup
Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Environment :: Console
Classifier: Intended Audience :: System Administrators
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3 :: Only
Classifier: Topic :: System :: Systems Administration
Requires-Dist: gitlab-registry-usage (>=0.2.1)

GitLab-Registry-Cleanup
=======================

Introduction
------------

*GitLab-Registry-Cleanup* is a Python package for finding and (soft)
deleting untagged Docker images in a GitLab Docker registry. Currently
(April 2018), Docker registries only cleanup data if the removal on an
image is requested explicitly by the user. Therefore, **the registry
will keep on growing** if users only push new images. **Overwriting
existing tags is not sufficient** since images could be referenced by
their SHA256 hash by an external resource. This tool assumes that
untagged images are not needed any more and deletes them explicitly. It
can only be used for the embedded registry of a GitLab server.

Installation
------------

The latest version is available from PyPI:

.. code:: bash

    pip install gitlab-registry-cleanup

This package can only be used on a GitLab server, since it needs read
access to the Docker registry files stored on disk. The script needs
root privileges, so either use the root account or the ``sudo`` utility.
The actual deletion of images is done via the GitLab web api to prevent
any data loss.

Usage
-----

Command Line Interface
~~~~~~~~~~~~~~~~~~~~~~

After installing with ``pip``, a ``gitlab-registry-cleanup`` command is
available:

::

    usage: gitlab-registry-cleanup [-h] [-g GITLAB_SERVER] [-r REGISTRY_SERVER]
                                   [-c CREDENTIALS_FILE] [-u USERNAME] [-n] [-V]

    gitlab-registry-cleanup is a utility for cleaning up a GitLab registry by soft deleting untagged images.

    optional arguments:
      -h, --help            show this help message and exit
      -g GITLAB_SERVER, --gitlab-server GITLAB_SERVER
                            GitLab server hostname (for example `mygitlab.com`)
      -r REGISTRY_SERVER, --registry-server REGISTRY_SERVER
                            GitLab registry server hostname (for example
                            `registry.mygitlab.com`)
      -c CREDENTIALS_FILE, --credentials-file CREDENTIALS_FILE
                            path to a file containing username and password/access
                            token (on two separate lines)
      -u USERNAME, --user USERNAME
                            user account for querying the GitLab API (default:
                            root)
      -n, --dry-run         only print which images would be deleted
      -V, --version         print the version number and exit

You should specify a GitLab server hostname (``-g``), a GitLab registry
server hostname (``-r``) and either a credentials file (``-c``) or
username (``-u``) and password (read from stdin).

Final disk cleanup
~~~~~~~~~~~~~~~~~~

``gitlab-registry-cleanup`` only *soft* deletes images. As a result,
images are removed but their data (the image layers) are still stored on
disk. To delete unused image layers, you must run the Docker registry
garbage collector. If you have installed the GitLab omnibus package, you
can run the following commands:

.. code:: bash

    sudo gitlab-ctl stop registry
    sudo /opt/gitlab/embedded/bin/registry garbage-collect /var/opt/gitlab/registry/config.yml
    sudo gitlab-ctl start registry


