Intro#

I have the following simple backup setup for my Proxmox server. Since backup schedule is weekly, it would make a lot of sense to bring the backup server up only when it’s needed. I decided to make my own script after seeing one on ¹ Proxmox forum.

Setup#

Here are the steps

1. configure the PBS server’s BIOS so Wake-on-lan feature is enabled
2. install wakeonlan program on the Proxmox server if it’s not already installed

apt install wakeonlan

3. set up password-less login from Proxmox server

ssh-keygen -t ed25519
ssh-copy-id root@$PBS

4. create /usr/local/bin/vzdump-hook-script as follow and make it executable

#!/bin/bash
IP=<LAN_IP_OF_PBS>
MAC=<MAC_ADDRESS_OF_PBS>
# wait for at least  $COUNT pings
COUNT=80

# check if wakeonlan is installed
which -s wakeonlan
if [ $? -ne 0 ]; then
    echo "Please install wakeonlan first"
    exit 1
fi
if [ "$1" == "job-init" ]; then
    if ! ping -c 1 -W 1 "$IP" >/dev/null 2>&1; then
        /usr/bin/wakeonlan $MAC   #(mac Address of PBS Server)
        ping $IP -c $COUNT
    fi
fi

if [ "$1" == "job-end" ]; then
    ssh root@$IP "/usr/sbin/poweroff < /dev/null &"
fi

exit 0

5. update /etc/pve/jobs.cfg to add this line

script /usr/local/bin/vzdump-hook-script

Reference#