Backup Manager

IMPORTANT: Backup manager is a work in progress and not all advertised features work. Especially no monitoring has been implemented so you will not know if a backup might fail which might be dangerous!

what it does

Backup manager will allow you to manage restic backup repositories.

Before you can backup to a restic repository, the repository will need to be initialized. After taking backups, the repository needs to be maintained:

• Old backups need to be deleted

• Backups need to be pruned so diskspace will be freed

• Backups might need to be verified so we are sure the backups are ok

• Backups need to be monitor'ed so we are sure that they are taken

• Backups need to be copied so they are not just stored on one location

Backup manager is a ppm-based script that will take care of the above points. It will be ran daily in cron and will do the following steps:

• Verify that it can login into each and every repository in the configuration file

It will fail at this point if a repository is unavailable, outputting the shell command to execute if a repository just wasn't initialized yet

• Verify that all polynomials of the backups are the same.

This program is made to copy backups from one repository to another. This basically requires repositories to have the same polynomial settings in order to work optimally.

Backup manager will refuse to continue if the polynomials are incorrect.

• Check the backup snapshots

Backup manager will test that all hosts are properly configured in it's configuration file. Ensure the hosts are properly configured.

• Copy backups

If 2 repositories have the same host assigned, backup manager will make sure both of them have the latest backup for that host present. If the newest backup on both repositories are not the same, it will copy the newest version to the other repository

• Verify backups

If repository verification is turned on, the repository is verified to ensure it is sound. A status file is kept - if we know the repository is in good state, we will check 5% of the repository at most every 12 hours. If we don't know the repository is in good state from the status file, a full check will be performed, so we are certain the backups are valid

• Cleaning out old backups

We use the status file to run this only once every 15 days: we will forget all old snapshots according to the configuration file, and prune all files if more then 10% is stale.

Configuration

To configure it, ensure the ppm configuration file is filled in. The configuration definition can be read in appinfo.yml (This is still a todo to let ppm generate the documentation file for this config)