{{>toc}}

h1. Backup

h2. Liens

* [[Backup_infra]]
* [[Apt_Backports_TTNN]] borg debian packaging
* https://www.reddit.com/r/linux/comments/42feqz/i_asked_here_for_the_optimal_backup_solution_and/

h2. BackupPC

* http://backuppc.sourceforge.net/

h2. Attic

* https://attic-backup.org/
* https://lists.tetaneutral.net/pipermail/technique/2015-September/001971.html
** Logiciel de backup : choix de attic

h2. Borg

* https://github.com/borgbackup
* http://readthedocs.org/projects/borgbackup/
* http://puppet.tetaneutral.net/pool/main/b/borgbackup/
* http://puppet.tetaneutral.net/dists/

h2. Migration Attic vers Borg

* https://github.com/borgbackup/borg/pull/231
* old: https://chiliproject.tetaneutral.net/projects/git-tetaneutral-net/repository/puppet-backup
* new: https://chiliproject.tetaneutral.net/projects/git-tetaneutral-net/repository/puppetmaster/revisions/master/entry/modules/ttnn/manifests/backup.pp
** git history BackupPC => Attic => Borg

<pre>
# apt-get -t jessie-backports install borgbackup
$ cd /backup/attic/
$ borg upgrade <repo>
$ borg check --repair <repo>
$ mv <repo> ../borg/
$ chown -R backupinfra: /backup/borg/<repo>
</pre>

Dans le module puppet, le changement le plus important est le parametre compression explicite pour correspondre au défaut de attic create : compression:

<pre>
attic create ... <repo> -> <repo>-> borg create --compression zlib,6 ... <repo>
</pre>

Sinon le prochain backup sera non compressé, et aucun nouveau chucks ne correspondra aux anciens -> perte de la dedup. "zlib,6" étant le niveau de compression de attic.