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.
Run the following command. If you get arm64, it's 64bit, otherwise you'll see armv7l which is 32bit.
uname -m
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:/
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!