Proxmox #proxmox

interfaces.pve1

# network interface settings; autogenerated
# Please do NOT modify this file directly, unless you know what
# you're doing.
#
# If you want to manage parts of the network configuration manually,
# please utilize the 'source' or 'source-directory' directives to do
# so.
# PVE will preserve these directives, but will NOT read its network
# configuration from sourced files, so do not attempt to move any of
# the PVE managed interfaces into external files!

auto lo
iface lo inet loopback

# SFPP+ Ports
iface eno1 inet manual
iface eno2 inet manual
iface eno3 inet manual
iface eno4 inet manual

# RJ45 Ports
iface enp4s0 inet manual
iface enp5s0 inet manual
iface enp6s0 inet manual
iface enp7s0 inet manual

# WAN Interface
iface enp8s0 inet manual

auto bond0
iface bond0 inet manual
  bond-slaves eno1 eno2 eno3 eno4 enp7s0
  bond-mode active-backup
  bond-miimon 500
  bond-primary eno1

auto vmbr0
iface vmbr0 inet manual
  bridge-ports bond0 enp4s0 enp5s0 enp6s0
  bridge-stp off
  bridge-fd 0
  bridge-vlan-aware yes
  bridge-vids 2-4094
  post-up /sbin/bridge vlan add vid 30 dev enp6s0 pvid untagged
  pre-down /sbin/bridge vlan del vid 30 dev enp6s0 pvid untagged
#Local network RJ45

auto vmbr0.10
iface vmbr0.10 inet static
  address 10.10.0.2/24
#SkyNet

auto vmbr0.100
iface vmbr0.100 inet static
  address 10.100.0.2/24
  gateway 10.100.0.11
#SkyNet Management

auto vmbr1
iface vmbr1 inet manual
  bridge-ports enp8s0
  bridge-stp off
  bridge-fd 0
  bridge-vlan-aware yes
  bridge-vids 4,6
#WAN (KPN PPPoE)

source /etc/network/interfaces.d/*

interfaces.pve2

# network interface settings; autogenerated
# Please do NOT modify this file directly, unless you know what
# you're doing.
#
# If you want to manage parts of the network configuration manually,
# please utilize the 'source' or 'source-directory' directives to do
# so.
# PVE will preserve these directives, but will NOT read its network
# configuration from sourced files, so do not attempt to move any of
# the PVE managed interfaces into external files!

auto lo
iface lo inet loopback

iface eno1 inet manual

auto vmbr0
iface vmbr0 inet manual
  bridge-ports eno1
  bridge-stp off
  bridge-fd 0
  bridge-vlan-aware yes
  bridge-vids 2-4094

auto vmbr0.10
iface vmbr0.10 inet static
  address 10.10.0.3/24
#SkyNet

auto vmbr0.100
iface vmbr0.100 inet static
  address 10.100.0.3/24
  gateway 10.100.0.11
#SkyNet Management

source /etc/network/interfaces.d/*

interfaces.pve3

# network interface settings; autogenerated
# Please do NOT modify this file directly, unless you know what
# you're doing.
#
# If you want to manage parts of the network configuration manually,
# please utilize the 'source' or 'source-directory' directives to do
# so.
# PVE will preserve these directives, but will NOT read its network
# configuration from sourced files, so do not attempt to move any of
# the PVE managed interfaces into external files!

auto lo
iface lo inet loopback

auto eno1
iface eno1 inet manual

auto eno2
iface eno2 inet manual

iface enx620f58a7b3f5 inet manual

iface enxc6e7015760f0 inet manual

#auto bond0
#iface bond0 inet manual
#  bond-slaves eno1 eno2
#  bond-miimon 500
#  bond-mode 802.3ad
#  bond-xmit-hash-policy layer2+3
#LACP 802.3ad bonded interfaces

auto vmbr0
iface vmbr0 inet manual
  bridge-ports eno1 eno2
  bridge-stp off
  bridge-fd 0
  bridge-vlan-aware yes
  bridge-vids 2-4094
#Physical network bridge (VLAN aware)

auto vmbr0.10
iface vmbr0.10 inet static
  address 10.10.0.4/24
  gateway 10.10.0.1
#SkyNet

auto vmbr0.100
iface vmbr0.100 inet static
  address 10.100.0.4/24
  gateway 10.100.0.11
#SkyNet Management

auto vmbr1
iface vmbr1 inet static
  bridge-ports none
  bridge-stp off
  bridge-fd 0
#Proxmox internal network

source /etc/network/interfaces.d/*

proxmox-node-rename.sh

#!/bin/bash
# ---------------------------------------------------------------------
# Hostname Change Script for Proxmox Nodes
#
# Author: B. van Wetten
# Creation Date: 2025-02-10
# Last Update: 2025-02-10
#
# Description: This script changes the Proxmox host/node hostname,
#              backs up and restores QEMU configuration, updates /etc/hosts,
#              restarts Proxmox services, checks for LXC containers,
#              and optionally reboots the host.
#
# Usage: Run this script as root.
#
# Note: Ensure that you have backups and proper permissions before
#       executing this script.
#
# Download: wget https://gist.githubusercontent.com/QNimbus/90595213f7a765390a3fa6a9f02966fa/raw/proxmox-node-rename.sh
# ---------------------------------------------------------------------

set -euo pipefail

# Ensure the script is run as root
if [[ $EUID -ne 0 ]]; then
    echo "This script must be run as root."
    exit 1
fi

# Check for LXC containers on the host and display a caution if any are found.
check_lxc_containers() {
    if command -v pct >/dev/null 2>&1; then
        # 'pct list' prints a header line, so skip it
        local lxc_count
        lxc_count=$(pct list | tail -n +2 | wc -l)
        if [[ "$lxc_count" -gt 0 ]]; then
            echo "Caution: Detected ${lxc_count} LXC container(s) on this host."
            echo "Migrating LXC containers has not been tested yet."
            echo "Please ensure you have proper backups before proceeding."
            echo
        fi
    else
        echo "Warning: 'pct' command not found. Skipping LXC container check."
    fi
}

check_lxc_containers

change_hostname() {
    local original_hostname
    original_hostname=$(hostname)

    read -rp "Enter new hostname: " new_hostname
    if [[ -z "$new_hostname" ]]; then
        echo "Error: New hostname cannot be empty."
        exit 1
    fi

    local qemu_src="/etc/pve/nodes/${original_hostname}/qemu-server"
    local qemu_tmp="/tmp/qemu"
    local qemu_dst="/etc/pve/nodes/${new_hostname}/qemu-server"

    # Backup QEMU configuration if available
    if [[ -d "$qemu_src" && "$(ls -A "$qemu_src" 2>/dev/null)" ]]; then
        echo "Backing up QEMU configs from ${qemu_src} to ${qemu_tmp}..."
        mkdir -p "$qemu_tmp"
        cp -a "$qemu_src/"* "$qemu_tmp/"
    else
        echo "No QEMU configurations found. Skipping backup."
    fi

    # Change the system hostname
    echo "Changing hostname from ${original_hostname} to ${new_hostname}..."
    hostnamectl set-hostname "$new_hostname"

    # Update /etc/hosts with a word-boundary based replacement
    echo "Updating /etc/hosts..."
    sed -i "s/\b${original_hostname}\b/${new_hostname}/g" /etc/hosts

    # Restart Proxmox services
    local services=("pveproxy.service" "pvebanner.service" "pve-cluster.service" "pvestatd.service" "pvedaemon.service")
    echo "Restarting Proxmox services..."
    for service in "${services[@]}"; do
        if systemctl restart "$service"; then
            echo "Successfully restarted $service."
        else
            echo "Warning: Failed to restart $service."
        fi
    done

    # Update node directory and restore QEMU configuration if backup exists
    if [[ -d "$qemu_tmp" && "$(ls -A "$qemu_tmp" 2>/dev/null)" ]]; then
        echo "Creating new node directory for ${new_hostname}..."
        mkdir -p "$qemu_dst"
        cp -a "$qemu_tmp/"* "$qemu_dst/"
        echo "QEMU configuration moved to ${qemu_dst}."
    else
        echo "No QEMU backup found. Skipping restore."
    fi

    echo "Hostname update completed successfully."
}

change_hostname

# Prompt the user to reboot the host
read -rp "Do you want to reboot the host now? (y/N): " reboot_choice
reboot_choice=${reboot_choice,,}  # Convert input to lowercase
if [[ "$reboot_choice" == "y" || "$reboot_choice" == "yes" ]]; then
    echo "Rebooting host..."
    reboot
else
    echo "Reboot canceled. Please reboot the host manually later to apply all changes."
fi