#!/bin/bash
# Бэкап /etc/pve и конфигов хоста (interfaces, hosts, resolv.conf).
# Запускать на хосте Proxmox под root. Cron: 0 3 * * * (после основного backup job в 02:00).
set -e

BACKUP_ROOT="/mnt/backup/proxmox/etc-pve"
RETENTION_DAYS=30

if [ "$(id -u)" -ne 0 ]; then
  echo "Запускайте под root."
  exit 1
fi

mkdir -p "$BACKUP_ROOT"
DATE=$(date +%Y%m%d-%H%M)

tar -czf "$BACKUP_ROOT/etc-pve-$DATE.tar.gz" -C / etc/pve
tar -czf "$BACKUP_ROOT/etc-host-configs-$DATE.tar.gz" -C / etc/network/interfaces etc/hosts etc/resolv.conf 2>/dev/null || true

chmod 600 "$BACKUP_ROOT"/etc-pve-*.tar.gz "$BACKUP_ROOT"/etc-host-configs-*.tar.gz 2>/dev/null || true

find "$BACKUP_ROOT" -name 'etc-pve-*.tar.gz' -mtime +$RETENTION_DAYS -delete
find "$BACKUP_ROOT" -name 'etc-host-configs-*.tar.gz' -mtime +$RETENTION_DAYS -delete

NOTIFY_SCRIPT="${NOTIFY_SCRIPT:-/root/scripts/notify-telegram.sh}"
if [ -x "$NOTIFY_SCRIPT" ]; then
  SIZE=$(du -sh "$BACKUP_ROOT" 2>/dev/null | cut -f1) || true
  BODY="Резервное копирование завершено.
Объекты: архивы /etc/pve, конфиги сети (interfaces, hosts, resolv.conf).
Размер копии: ${SIZE:-—}."
  "$NOTIFY_SCRIPT" "⚙️ Конфиги хоста" "$BODY" || true
fi