feat: Enhanced simple LVM backup system
- Add 3 backup modes: LV→LV, LV→Raw, VG→Raw - Simple GUI with mode selection and dynamic target lists - Command-line version with clear mode support - Enhanced drive listing with mode-specific options - Minimal logic: just snapshot → copy → cleanup - No complex migration features that cause system issues - Supports refreshing existing backups and creating fresh ones
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260
enhanced_simple_backup.sh
Executable file
260
enhanced_simple_backup.sh
Executable file
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#!/bin/bash
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# Enhanced Simple LVM Backup Script
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# Supports three backup modes:
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# 1. LV → LV: Update existing logical volume backup
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# 2. LV → Raw: Create fresh backup on raw device
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# 3. VG → Raw: Clone entire volume group to raw device
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set -e
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# Colors
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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NC='\033[0m'
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usage() {
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echo "Enhanced Simple LVM Backup Script"
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echo ""
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echo "Usage:"
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echo " $0 lv-to-lv SOURCE_LV TARGET_LV"
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echo " $0 lv-to-raw SOURCE_LV TARGET_DEVICE"
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echo " $0 vg-to-raw SOURCE_VG TARGET_DEVICE"
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echo ""
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echo "Modes:"
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echo " lv-to-lv - Update existing LV backup (SOURCE_LV → TARGET_LV)"
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echo " lv-to-raw - Create fresh backup (SOURCE_LV → raw device)"
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echo " vg-to-raw - Clone entire VG (SOURCE_VG → raw device)"
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echo ""
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echo "Examples:"
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echo " $0 lv-to-lv /dev/internal-vg/root /dev/backup-vg/root"
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echo " $0 lv-to-raw /dev/internal-vg/root /dev/sdb"
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echo " $0 vg-to-raw internal-vg /dev/sdb"
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echo ""
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echo "List available sources/targets:"
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echo " ./list_drives.sh"
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echo ""
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exit 1
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}
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log() {
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echo -e "${GREEN}[$(date '+%H:%M:%S')] $1${NC}"
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}
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error() {
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echo -e "${RED}[ERROR] $1${NC}" >&2
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cleanup_and_exit 1
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}
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warn() {
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echo -e "${YELLOW}[WARNING] $1${NC}"
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}
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info() {
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echo -e "${BLUE}[INFO] $1${NC}"
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}
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cleanup_and_exit() {
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local exit_code=${1:-0}
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if [ -n "$SNAPSHOT_PATH" ] && lvs "$SNAPSHOT_PATH" >/dev/null 2>&1; then
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warn "Cleaning up snapshot: $SNAPSHOT_PATH"
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lvremove -f "$SNAPSHOT_PATH" || warn "Failed to remove snapshot"
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fi
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exit $exit_code
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}
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# Trap for cleanup
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trap 'cleanup_and_exit 130' INT TERM
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# Check arguments
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if [ $# -ne 3 ]; then
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usage
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fi
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MODE="$1"
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SOURCE="$2"
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TARGET="$3"
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# Check if running as root
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if [ "$EUID" -ne 0 ]; then
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error "This script must be run as root"
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fi
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# Validate mode
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case "$MODE" in
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"lv-to-lv"|"lv-to-raw"|"vg-to-raw")
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;;
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*)
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error "Invalid mode: $MODE"
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;;
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esac
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log "Enhanced Simple LVM Backup"
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log "Mode: $MODE"
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log "Source: $SOURCE"
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log "Target: $TARGET"
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# Mode-specific validation and execution
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case "$MODE" in
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"lv-to-lv")
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# LV to LV backup
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if [ ! -e "$SOURCE" ]; then
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error "Source LV does not exist: $SOURCE"
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fi
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if [ ! -e "$TARGET" ]; then
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error "Target LV does not exist: $TARGET"
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fi
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# Extract VG and LV names
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VG_NAME=$(lvs --noheadings -o vg_name "$SOURCE" | tr -d ' ')
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LV_NAME=$(lvs --noheadings -o lv_name "$SOURCE" | tr -d ' ')
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SNAPSHOT_NAME="${LV_NAME}_backup_snap"
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SNAPSHOT_PATH="/dev/$VG_NAME/$SNAPSHOT_NAME"
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info "This will update the existing backup LV"
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echo ""
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echo -e "${YELLOW}Source LV: $SOURCE${NC}"
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echo -e "${YELLOW}Target LV: $TARGET${NC}"
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echo -e "${YELLOW}The target LV will be overwritten with current source data${NC}"
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echo ""
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read -p "Continue? (yes/no): " confirm
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if [ "$confirm" != "yes" ]; then
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echo "Backup cancelled."
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exit 0
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fi
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log "Creating snapshot of source LV"
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lvcreate -L1G -s -n "$SNAPSHOT_NAME" "$SOURCE" || error "Failed to create snapshot"
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log "Copying snapshot to target LV"
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if command -v pv >/dev/null 2>&1; then
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pv "$SNAPSHOT_PATH" | dd of="$TARGET" bs=4M || error "Copy failed"
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else
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dd if="$SNAPSHOT_PATH" of="$TARGET" bs=4M status=progress || error "Copy failed"
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fi
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log "Cleaning up snapshot"
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lvremove -f "$SNAPSHOT_PATH" || warn "Failed to remove snapshot"
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SNAPSHOT_PATH=""
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log "LV to LV backup completed successfully"
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;;
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"lv-to-raw")
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# LV to raw device backup
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if [ ! -e "$SOURCE" ]; then
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error "Source LV does not exist: $SOURCE"
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fi
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if [ ! -e "$TARGET" ]; then
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error "Target device does not exist: $TARGET"
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fi
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# Extract VG and LV names
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VG_NAME=$(lvs --noheadings -o vg_name "$SOURCE" | tr -d ' ')
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LV_NAME=$(lvs --noheadings -o lv_name "$SOURCE" | tr -d ' ')
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SNAPSHOT_NAME="${LV_NAME}_backup_snap"
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SNAPSHOT_PATH="/dev/$VG_NAME/$SNAPSHOT_NAME"
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info "This will create a fresh backup on raw device"
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echo ""
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echo -e "${YELLOW}Source LV: $SOURCE${NC}"
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echo -e "${YELLOW}Target Device: $TARGET${NC}"
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echo -e "${RED}WARNING: All data on $TARGET will be lost!${NC}"
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echo ""
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read -p "Continue? (yes/no): " confirm
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if [ "$confirm" != "yes" ]; then
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echo "Backup cancelled."
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exit 0
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fi
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log "Creating snapshot of source LV"
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lvcreate -L1G -s -n "$SNAPSHOT_NAME" "$SOURCE" || error "Failed to create snapshot"
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log "Copying snapshot to target device"
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if command -v pv >/dev/null 2>&1; then
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pv "$SNAPSHOT_PATH" | dd of="$TARGET" bs=4M || error "Copy failed"
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else
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dd if="$SNAPSHOT_PATH" of="$TARGET" bs=4M status=progress || error "Copy failed"
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fi
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log "Cleaning up snapshot"
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lvremove -f "$SNAPSHOT_PATH" || warn "Failed to remove snapshot"
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SNAPSHOT_PATH=""
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log "LV to raw device backup completed successfully"
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;;
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"vg-to-raw")
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# VG to raw device backup
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if ! vgs "$SOURCE" >/dev/null 2>&1; then
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error "Source VG does not exist: $SOURCE"
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fi
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if [ ! -e "$TARGET" ]; then
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error "Target device does not exist: $TARGET"
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fi
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# Get the first PV of the source VG
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SOURCE_PV=$(vgs --noheadings -o pv_name "$SOURCE" | head -n1 | tr -d ' ')
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if [ -z "$SOURCE_PV" ]; then
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error "No physical volumes found for VG: $SOURCE"
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fi
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info "This will clone the entire volume group"
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echo ""
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echo -e "${YELLOW}Source VG: $SOURCE${NC}"
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echo -e "${YELLOW}Source PV: $SOURCE_PV${NC}"
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echo -e "${YELLOW}Target Device: $TARGET${NC}"
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echo -e "${RED}WARNING: All data on $TARGET will be lost!${NC}"
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echo -e "${BLUE}This preserves LVM metadata and all logical volumes${NC}"
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echo ""
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read -p "Continue? (yes/no): " confirm
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if [ "$confirm" != "yes" ]; then
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echo "Backup cancelled."
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exit 0
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fi
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log "Copying entire PV to target device"
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log "This preserves LVM structure and all LVs"
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if command -v pv >/dev/null 2>&1; then
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pv "$SOURCE_PV" | dd of="$TARGET" bs=4M || error "Copy failed"
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else
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dd if="$SOURCE_PV" of="$TARGET" bs=4M status=progress || error "Copy failed"
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fi
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log "VG to raw device backup completed successfully"
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log "Target device now contains complete LVM structure"
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;;
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esac
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echo ""
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echo -e "${GREEN}SUCCESS: Backup completed!${NC}"
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echo ""
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echo "Next steps:"
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case "$MODE" in
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"lv-to-lv")
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echo "- Your backup LV has been updated"
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echo "- You can mount $TARGET to verify the backup"
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;;
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"lv-to-raw")
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echo "- Your backup device contains a raw copy of the LV"
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echo "- You can mount $TARGET directly or restore from it"
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;;
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"vg-to-raw")
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echo "- Your backup device contains the complete LVM structure"
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echo "- You can boot from $TARGET or import the VG for recovery"
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echo "- To access: vgimport or boot directly from the device"
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;;
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esac
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echo ""
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