Backup a backup server :-)

[grl]

Hi!
Could not find that in the docs - but what do I need to backup on the pbs?
I think about a pbs with a storage for the OS and different storages for the backups.
What happens when the OS storage fails? What do I need to backup so I can reuse the backups stored on the backup storages with a new pbs after a failure?

regards
Luggi

 

[Dunuin]

Could not find that in the docs - but what do I need to backup on the pbs?

You just add a new "Proxmox Backup Server" storage in PVE pointing to your PBS.

I think about a pbs with a storage for the OS and different storages for the backups.

Then keep in mind that using HDDs will be very slow as PBS needs IOPS performance. For many TBs of backups you will probably need a SSD-only storage or restores/backups/verfies will be too slow. For only a few TBs of backups a combination of HDDs (for data) and SSDs (as ZFS special device for metadata) might be fine. HDD only isn't really usable, as the GC task will take way too long.

What happens when the OS storage fails?

Its just a Debian based Linux. So when your OS storage fails the PBS won't work. Use ECC RAM, ZFS raid1 and an UPS so it won't fail.

What do I need to backup so I can reuse the backups stored on the backup storages with a new pbs after a failure?

Your config files "/etc/proxmox-backup". Also keep in mind that there is no way in the CLI/webUI to import a n existing datastore. You will have to manually replace/edit the config files.