debops.dpkg_cleanup Ansible role is a "helper role", meant to be used
by other roles via the
import_role Ansible module, or through a playbook.
The role helps prepare the host to clean up and revert certain files and directories when a specific Debian/Ubuntu package is removed or purged from the system. This ensures that customizations done by other Ansible roles are correctly reverted and removed when a different role replaces a given functionality with a different service - for example a webserver is switched from nginx to apache2, an NTP server is changed, and the like. This way roles that manage the same service don't necessarily have to include code that takes care of removing parts of alternative services.
The role functions by adding a dpkg
pre-invoke hook to execute
a custom Bash script when a Debian package is removed or purged. The script
checks if a specific package is being removed/purged and before that happens,
it executes various commands that can:
- revert files diverted by the dpkg-divert(1) command,
- remove files or directories not covered by the deb-prerm(5) maintainer script included in the package,
- reload or restart systemd services.
This helps bring back the system to a state where dpkg can cleanly remove or purge the package.
debops.dpkg_cleanup - Prepare a dpkg cleanup hook using Ansible Copyright (C) 2020 Maciej Delmanowski <firstname.lastname@example.org> Copyright (C) 2020 DebOps <https://debops.org/> SPDX-License-Identifier: GPL-3.0-only This Ansible role is part of DebOps. DebOps is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 3, as published by the Free Software Foundation. DebOps is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with DebOps. If not, see https://www.gnu.org/licenses/.