Proxmox DHCP watchdog

interfaces-watchdog

#!/usr/bin/env bash

restore_dhcp() {
    if [ -n "$(grep 'iface vmbr0 inet static' /etc/network/interfaces)" ]; then
        sed -e 's|iface\ vmbr0\ inet\ static|iface\ vmbr0\ inet\ dhcp|g' -i /etc/network/interfaces
    fi
}

restore_dhcp

inotifywait -e close_write,moved_to,create -m /etc/network |
while read -r directory events filename; do
    if [ "$filename" = "interfaces" ]; then
        restore_dhcp
    fi
done