Proxmox - script that shuts down VMs and Containers before the hypervisor is shut down

proxmox_shutdown.sh

#!/bin/bash

# get list of VMs and LXCs on the node
VMIDs=$(/usr/sbin/qm list        | tail -n +2 | awk '/[0-9]/ {print $1}')
LXCs=$(/usr/bin/lxc-ls)

# ask LXCs to stop
for LXC in $LXCs
do
    /usr/bin/lxc-stop $LXC
done

# ask VMIDs to shutdown
for VM in $VMIDs
do
    /usr/sbin/qm shutdown $VM
done

#wait until they're done (and down)
for LXC in $LXCs
do
    while [[ $(lxc-info $LXC | grep State | awk '{print $2}') =~ RUNNING ]] ; do
        sleep 1
    done
done

for VM in $VMIDs
do
    while [[ $(/usr/sbin/qm status $VM) =~ running ]] ; do
        sleep 1
    done
done

# do the poweroff
/usr/sbin/poweroff