Using Proxmox backup client via Docker

do-backup.sh

#!/bin/bash

ts=$(date +%y-%m-%d_%Hh%M)

sudo docker run --rm -it \
        -e PBS_FINGERPRINT="foobar" \
        -e PBS_REPOSITORY="ding@[email protected]:datastore" \
        -e PBS_PASSWORD="baz" \
        -v /mnt/data:/data \
        pbs \
        proxmox-backup-client backup "data-$ts.pxar:/data"

proxmox-backup.dockerfile

FROM debian:bullseye

RUN apt-get update \
 && apt-get install -y wget \
 && wget https://enterprise.proxmox.com/debian/proxmox-release-bullseye.gpg -O /etc/apt/trusted.gpg.d/proxmox-release-bullseye.gpg \
 && echo "deb http://download.proxmox.com/debian/pbs-client bullseye main" >> /etc/apt/sources.list.d/pbs-client.list \
 && apt-get update \
 && apt-get install -y proxmox-backup-client