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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root
148
simple_backup.sh
Executable file
148
simple_backup.sh
Executable file
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#!/bin/bash
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# Simple LVM Backup Script
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# Does exactly what it says: snapshot -> copy -> cleanup
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# NO complex logic, just the essentials
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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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NC='\033[0m'
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usage() {
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echo "Usage: $0 SOURCE_LV TARGET_DEVICE"
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echo ""
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echo "Example: $0 /dev/internal-vg/root /dev/sdb"
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echo ""
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echo "This will:"
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echo "1. Create a snapshot of SOURCE_LV"
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echo "2. Copy it block-for-block to TARGET_DEVICE"
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echo "3. Clean up the snapshot"
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echo ""
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echo "WARNING: TARGET_DEVICE will be completely overwritten!"
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exit 1
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}
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log() {
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echo -e "${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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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 2 ]; then
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usage
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fi
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SOURCE_LV="$1"
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TARGET_DEVICE="$2"
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# Check if running as root
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if [ "$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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# Basic validation
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if [ ! -e "$SOURCE_LV" ]; then
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error "Source LV does not exist: $SOURCE_LV"
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fi
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if [ ! -e "$TARGET_DEVICE" ]; then
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error "Target device does not exist: $TARGET_DEVICE"
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fi
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# Extract VG and LV names
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VG_NAME=$(lvs --noheadings -o vg_name "$SOURCE_LV" | tr -d ' ')
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LV_NAME=$(lvs --noheadings -o lv_name "$SOURCE_LV" | tr -d ' ')
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SNAPSHOT_NAME="${LV_NAME}_simple_backup"
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SNAPSHOT_PATH="/dev/$VG_NAME/$SNAPSHOT_NAME"
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log "Simple LVM Backup Starting"
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log "Source: $SOURCE_LV"
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log "Target: $TARGET_DEVICE"
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log "Snapshot will be: $SNAPSHOT_PATH"
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# Final confirmation
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echo ""
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echo -e "${YELLOW}WARNING: This will completely overwrite $TARGET_DEVICE${NC}"
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echo -e "${YELLOW}All data on $TARGET_DEVICE will be lost!${NC}"
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echo ""
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read -p "Are you sure you want to continue? (yes/no): " confirm
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if [ "$confirm" != "yes" ]; then
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echo "Backup cancelled."
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exit 0
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fi
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echo ""
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log "Starting backup process..."
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# Step 1: Create snapshot
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log "Creating snapshot..."
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if ! lvcreate -L1G -s -n "$SNAPSHOT_NAME" "$SOURCE_LV"; then
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error "Failed to create snapshot"
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fi
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log "Snapshot created: $SNAPSHOT_PATH"
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# Step 2: Copy data
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log "Starting copy operation..."
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log "This may take a long time depending on the size of your data"
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# Use pv if available for progress, otherwise dd with progress
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if command -v pv >/dev/null 2>&1; then
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log "Using pv for progress monitoring"
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if ! pv "$SNAPSHOT_PATH" | dd of="$TARGET_DEVICE" bs=4M; then
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error "Copy operation failed"
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fi
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else
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log "Using dd (install 'pv' for progress monitoring)"
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if ! dd if="$SNAPSHOT_PATH" of="$TARGET_DEVICE" bs=4M status=progress; then
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error "Copy operation failed"
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fi
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fi
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log "Copy completed successfully"
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# Step 3: Clean up snapshot
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log "Removing snapshot..."
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if ! lvremove -f "$SNAPSHOT_PATH"; then
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warn "Failed to remove snapshot, but backup completed"
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warn "You may need to manually remove: $SNAPSHOT_PATH"
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else
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log "Snapshot cleaned up"
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fi
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log "Backup completed successfully!"
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log "Your data has been copied to: $TARGET_DEVICE"
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echo ""
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echo -e "${GREEN}SUCCESS: Backup completed!${NC}"
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echo ""
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echo "To verify the backup, you can:"
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echo "1. Mount $TARGET_DEVICE and check the files"
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echo "2. Boot from $TARGET_DEVICE if it's bootable"
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echo ""
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