Backup a Raspberry Pi to Proxmox Backup Server using the Proxmox Backup Client

pbs_on_rpi.md

Backup a Raspberry Pi to Proxmox Backup Server using the Proxmox Backup Client

This works on a Pi 4, and should work on a Pi 3, but to work on a Pi Zero you would have to figure out how to compile your own client. More info in this thread on the Proxmox forums.

Determine if your Pi is 32bit or 64bit

Run the following command. If you get arm64, it's 64bit, otherwise you'll see armv7l which is 32bit.

uname -m

Download a custom compiled version of the PBS client

Check for the latest release here. Then wget the PBS client, depending on if you need 32bit or 64bit.

wget https://github.com/ayufan/pve-backup-server-dockerfiles/releases/download/v1.1.9/proxmox-backup-client-v1.1.9-arm32v7.tgz

Extract the archive and move it to /usr/local/bin or wherever you'd like:

tar xvfz proxmox-backup-client-v1.1.9-arm32v7.tgz
mv proxmox-backup-client-v1.1.9 /usr/local/bin/pbs_client

Create a new script to do your backups at /usr/local/bin/pbs_backup.sh See the docs for more info on authentication:

#!/bin/bash

export PBS_REPOSITORY=pbs_client@pbs@pbs.local:mydatastore
export PBS_PASSWORD=mypassword
export PBS_FINGERPRINT="02:39:10:2d:23:59:5a:29:13:95:43:ad:d9:e7:d2:13:e5:f7:3e:fd:10:2e:38:9b:12:a3:1e:9e:4a:32:de:23"

apt clean cache
cd /usr/local/bin/pbs_backup
./proxmox-backup-client.sh backup root.pxar:/

Setup a cron job to do daily backups

Create /etc/cron.d/pbs_backup with:

# Run every day at 00:05
5 0 * * * root /usr/local/bin/pbs_backup.sh

Thanks a lot for this writeup... I was on the trail of finding pbs-client for ARM, but finding this helped out a lot!! I did use [some of] your script to make it much easier... I'm only running on a LOCAL IP, but I'll get that hostname setup some day.

Very much appreciate this... thanks kindly; now I can use my PBS for much more than only backing up PVE VMs. I'm about to give it the BIG test of about 14TB of backups. Again, thanks!

I'm getting an error. I'm trying to backup /export/Backup4TB from this Raspberry Pi NAS to my x86 PBS... it fails on the first file over 4GB; all drives are ext4, tho, so I'm confused:

Starting backup: host/SpeakerOffice/2022-07-13T15:43:34Z
Client name: SpeakerOffice
Starting backup protocol: Wed Jul 13 08:43:34 2022
Downloading previous manifest (Mon Jul 11 17:41:56 2022)
Upload directory '/export/Backup4TB' to 'x.x.x.x:PBS_backup' as root.pxar.didx
catalog upload error - channel closed
Error: stat failed on "SiriusXMFreeRadio.mp4": EOVERFLOW: Value too large for defined data type

You know, as if it were trying to send the file to an NTFS drive or something. I think this might be because the Pi is on Debian 10/buster and the PBS is on Debian 11/bullseye?? Any ideas?

This actually sounds like a 32bit issue, and if you google "EOVERFLOW: Value too large for defined data type" you'll get a lot of results for 32bit memory issues. I don't know if there's a workaround aside from using 64bit OS, maybe try the Proxmox/PBS forum.

I understand, andrewfraley - I saw the same info on a search... its weird, cause I can use proxmox-backup-client.sh to send a very small sub-directory... but once it hits a large file [6GB, I'm thinking the 4GB max NTFS???] but none of the drives are NTFS ; they are all, both remote and PBS, ext4. Weird... I'm on armv7l - am I correct in using the proxmox-backup-client-v2.1.5-arm32v7.tgz??

I'll post a question on the Proxmox/PBS forum ; this is a great tool, lol - I just hope I can get it w0rking for what I wanted to... backing up the huge NAS drives on this openmediavault machine. Heck, worst case I guess its just pushing me to move the NAS over to my PVE server... lol.

The backup works well, as far as I can see but how do I restore?

This was super helpful! Thanks for the write up 👍

The backup works well, as far as I can see but how do I restore?

Just found this guide and set up my Pis to back up.
For restoring at first sight seems you only have the file tree backed up.
So probably like so - Burn new image of Raspbian, download from PBS the files, copy to the new Pi disk?

Some question from and comments

• you indicate in the pbs_backup.sh - cd /usr/local/bin/pbs_backup however before you indicate to move it to ./pbs_client
• when I bash pbs_backup, I'm getting the following error ./proxmox-backup-client.sh: 7: exec: /usr/local/bin/pbs_client/lib/ld-linux-*: not found
  I do see a file /usr/local/bin/pbs_client/lib/ld-linux.so.2

Can you please advise ?