56c07dbe49
- Removed 40+ broken/messy scripts, moved to old_scripts/ - Created lvm_block_backup.sh - proper block-level LVM snapshot backup - Uses dd for block-level cloning instead of file-level rsync - Successfully tested: 462GB backup in 33 minutes - Creates exact, bootable clone of internal drive to external drive - Proper LVM snapshot management with cleanup - Clear documentation in README_BACKUP.md - Clean, minimal solution that actually works
409 lines
12 KiB
Bash
Executable File
409 lines
12 KiB
Bash
Executable File
#!/bin/bash
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# Enhanced LVM Snapshot Backup System
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# Integrates LVM snapshots with the existing backup system for M.2 external drives
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set -e
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# Colors for output
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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' # No Color
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# Configuration
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VG_NAME="internal-vg"
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SNAPSHOT_SIZE="2G"
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BACKUP_BASE_DIR="/mnt/backup"
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EXTERNAL_BACKUP_DRIVE="/dev/sda" # External HDD
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LOG_FILE="/var/log/lvm-snapshot-backup.log"
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# Snapshot names
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ROOT_SNAPSHOT="root-snapshot"
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HOME_SNAPSHOT="home-snapshot"
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BOOT_SNAPSHOT="boot-snapshot"
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log() {
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local message="[$(date '+%Y-%m-%d %H:%M:%S')] $1"
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echo -e "${BLUE}$message${NC}"
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echo "$message" >> "$LOG_FILE"
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}
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error() {
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local message="[ERROR] $1"
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echo -e "${RED}$message${NC}" >&2
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echo "$message" >> "$LOG_FILE"
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exit 1
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}
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warning() {
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local message="[WARNING] $1"
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echo -e "${YELLOW}$message${NC}"
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echo "$message" >> "$LOG_FILE"
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}
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success() {
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local message="[SUCCESS] $1"
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echo -e "${GREEN}$message${NC}"
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echo "$message" >> "$LOG_FILE"
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}
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check_lvm_system() {
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log "Checking LVM system status..."
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# Check if we're running on an LVM system
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if ! command -v lvm >/dev/null 2>&1; then
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error "LVM tools not found. This system may not support LVM."
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fi
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# Check if volume group exists
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if ! vgs "$VG_NAME" >/dev/null 2>&1; then
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error "Volume group '$VG_NAME' not found. Are you running on the migrated LVM system?"
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fi
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# Check available space for snapshots
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local vg_free=$(vgs --noheadings -o vg_free --units g "$VG_NAME" | tr -d ' G')
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local snapshot_size_num=$(echo "$SNAPSHOT_SIZE" | tr -d 'G')
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local required_space=$((snapshot_size_num * 3)) # 3 snapshots
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if (( $(echo "$vg_free < $required_space" | bc -l) )); then
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warning "Low free space in volume group ($vg_free GB available, $required_space GB recommended)"
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echo "Consider reducing snapshot size or extending volume group"
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fi
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success "LVM system check passed"
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}
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detect_backup_drive() {
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log "Detecting external backup drive..."
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# Look for drives that are not the current root drive
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local root_drive=$(lsblk -no PKNAME $(findmnt -no SOURCE /))
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local available_drives=($(lsblk -dpno NAME | grep -v "$root_drive"))
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if [ ${#available_drives[@]} -eq 0 ]; then
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error "No external drives found for backup"
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elif [ ${#available_drives[@]} -eq 1 ]; then
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EXTERNAL_BACKUP_DRIVE="${available_drives[0]}"
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log "Auto-selected backup drive: $EXTERNAL_BACKUP_DRIVE"
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else
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echo "Multiple external drives found:"
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for i in "${!available_drives[@]}"; do
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local drive="${available_drives[$i]}"
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local info=$(lsblk -no SIZE,MODEL "$drive" | head -1)
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echo "$((i+1)). $drive - $info"
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done
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read -p "Select backup drive [1-${#available_drives[@]}]: " choice
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EXTERNAL_BACKUP_DRIVE="${available_drives[$((choice-1))]}"
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fi
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success "Selected backup drive: $EXTERNAL_BACKUP_DRIVE"
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}
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create_snapshots() {
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log "Creating LVM snapshots..."
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# Remove existing snapshots if they exist
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remove_snapshots_quiet
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# Create snapshots for each logical volume
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local volumes=("root" "home" "boot")
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local snapshots=("$ROOT_SNAPSHOT" "$HOME_SNAPSHOT" "$BOOT_SNAPSHOT")
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for i in "${!volumes[@]}"; do
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local volume="${volumes[$i]}"
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local snapshot="${snapshots[$i]}"
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if lvs "$VG_NAME/$volume" >/dev/null 2>&1; then
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log "Creating snapshot: $snapshot for $volume"
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lvcreate -L "$SNAPSHOT_SIZE" -s -n "$snapshot" "/dev/$VG_NAME/$volume" || {
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error "Failed to create snapshot $snapshot"
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}
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success "Created snapshot: $snapshot"
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else
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warning "Logical volume $volume not found, skipping"
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fi
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done
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success "All snapshots created successfully"
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}
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mount_snapshots() {
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log "Mounting snapshots for backup..."
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# Create mount points
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mkdir -p "$BACKUP_BASE_DIR"/{root,home,boot}
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# Mount snapshots
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local snapshots=("$ROOT_SNAPSHOT" "$HOME_SNAPSHOT" "$BOOT_SNAPSHOT")
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local mount_points=("root" "home" "boot")
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for i in "${!snapshots[@]}"; do
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local snapshot="${snapshots[$i]}"
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local mount_point="$BACKUP_BASE_DIR/${mount_points[$i]}"
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if [ -e "/dev/$VG_NAME/$snapshot" ]; then
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log "Mounting /dev/$VG_NAME/$snapshot to $mount_point"
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mount "/dev/$VG_NAME/$snapshot" "$mount_point" || {
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warning "Failed to mount snapshot $snapshot"
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}
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fi
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done
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success "Snapshots mounted at $BACKUP_BASE_DIR"
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}
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backup_to_external() {
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log "Backing up snapshots to external drive..."
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if [ -z "$EXTERNAL_BACKUP_DRIVE" ]; then
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detect_backup_drive
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fi
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# Create backup directory on external drive
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local external_mount="/mnt/external-backup"
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mkdir -p "$external_mount"
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# Mount external drive (assume first partition)
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mount "${EXTERNAL_BACKUP_DRIVE}1" "$external_mount" 2>/dev/null || {
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# Try the whole drive if partition doesn't work
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mount "$EXTERNAL_BACKUP_DRIVE" "$external_mount" || {
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error "Failed to mount external backup drive"
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}
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}
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# Create timestamped backup directory
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local backup_timestamp=$(date '+%Y%m%d_%H%M%S')
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local backup_dir="$external_mount/lvm-snapshots/$backup_timestamp"
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mkdir -p "$backup_dir"
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# Backup each mounted snapshot
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local mount_points=("root" "home" "boot")
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for mount_point in "${mount_points[@]}"; do
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local source="$BACKUP_BASE_DIR/$mount_point"
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local target="$backup_dir/$mount_point"
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if mountpoint -q "$source"; then
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log "Backing up $mount_point to external drive..."
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mkdir -p "$target"
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rsync -avxHAX --progress "$source/" "$target/" || {
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warning "Backup of $mount_point failed"
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}
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else
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warning "Snapshot $mount_point not mounted, skipping"
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fi
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done
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# Create backup metadata
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cat > "$backup_dir/backup-info.txt" << EOF
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LVM Snapshot Backup Information
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===============================
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Backup Date: $(date)
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Source System: $(hostname)
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Volume Group: $VG_NAME
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Snapshot Size: $SNAPSHOT_SIZE
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Backup Location: $backup_dir
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Logical Volumes:
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$(lvs $VG_NAME)
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Volume Group Info:
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$(vgs $VG_NAME)
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Physical Volumes:
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$(pvs)
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EOF
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# Unmount external drive
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umount "$external_mount"
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success "Backup completed to $backup_dir"
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}
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remove_snapshots_quiet() {
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# Remove snapshots without error messages (used internally)
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lvremove -f "/dev/$VG_NAME/$ROOT_SNAPSHOT" 2>/dev/null || true
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lvremove -f "/dev/$VG_NAME/$HOME_SNAPSHOT" 2>/dev/null || true
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lvremove -f "/dev/$VG_NAME/$BOOT_SNAPSHOT" 2>/dev/null || true
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}
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remove_snapshots() {
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log "Cleaning up snapshots..."
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# Unmount snapshots
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umount "$BACKUP_BASE_DIR/root" 2>/dev/null || true
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umount "$BACKUP_BASE_DIR/home" 2>/dev/null || true
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umount "$BACKUP_BASE_DIR/boot" 2>/dev/null || true
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# Remove logical volumes
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remove_snapshots_quiet
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success "Snapshots removed"
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}
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list_snapshots() {
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echo "Current LVM snapshots:"
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lvs "$VG_NAME" | grep -E "(snapshot|Snap%)" || echo "No snapshots found"
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}
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show_status() {
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echo -e "${GREEN}=== LVM Snapshot Backup Status ===${NC}"
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echo
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echo "Volume Group Information:"
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vgs "$VG_NAME" 2>/dev/null || echo "Volume group not found"
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echo
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echo "Logical Volumes:"
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lvs "$VG_NAME" 2>/dev/null || echo "No logical volumes found"
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echo
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echo "Current Snapshots:"
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list_snapshots
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echo
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echo "Mount Status:"
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if mountpoint -q "$BACKUP_BASE_DIR/root" 2>/dev/null; then
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echo " Root snapshot: mounted at $BACKUP_BASE_DIR/root"
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else
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echo " Root snapshot: not mounted"
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fi
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if mountpoint -q "$BACKUP_BASE_DIR/home" 2>/dev/null; then
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echo " Home snapshot: mounted at $BACKUP_BASE_DIR/home"
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else
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echo " Home snapshot: not mounted"
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fi
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if mountpoint -q "$BACKUP_BASE_DIR/boot" 2>/dev/null; then
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echo " Boot snapshot: mounted at $BACKUP_BASE_DIR/boot"
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else
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echo " Boot snapshot: not mounted"
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fi
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}
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integrate_with_backup_system() {
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log "Integrating with existing backup system..."
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# Check if main backup system exists
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if [ -f "./backup_script.sh" ]; then
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log "Found main backup system - creating integration"
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# Create wrapper script that combines snapshot and full backup
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cat > "./lvm_integrated_backup.sh" << 'EOF'
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#!/bin/bash
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# Integrated LVM + Full System Backup
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# Combines LVM snapshots with the main backup system
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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echo "=== Integrated LVM Backup System ==="
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echo "1. LVM Snapshot Backup (fast, consistent)"
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echo "2. Full System Backup (complete clone)"
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echo "3. Combined Backup (snapshots + clone)"
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echo
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read -p "Select backup type [1-3]: " choice
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case $choice in
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1)
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echo "Performing LVM snapshot backup..."
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sudo "$SCRIPT_DIR/lvm_snapshot_backup.sh" backup
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;;
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2)
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echo "Performing full system backup..."
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sudo "$SCRIPT_DIR/backup_script.sh"
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;;
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3)
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echo "Performing combined backup..."
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echo "Step 1: LVM snapshots..."
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sudo "$SCRIPT_DIR/lvm_snapshot_backup.sh" backup
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echo "Step 2: Full system clone..."
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sudo "$SCRIPT_DIR/backup_script.sh" --sync
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;;
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*)
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echo "Invalid choice"
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exit 1
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;;
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esac
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EOF
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chmod +x "./lvm_integrated_backup.sh"
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success "Created integrated backup script: lvm_integrated_backup.sh"
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else
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warning "Main backup system not found in current directory"
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fi
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}
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show_usage() {
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echo "Usage: $0 {create|mount|remove|backup|external|status|list|integrate}"
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echo
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echo "Commands:"
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echo " create - Create LVM snapshots only"
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echo " mount - Mount existing snapshots for access"
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echo " remove - Remove snapshots and unmount"
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echo " backup - Create snapshots and mount (ready for backup)"
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echo " external - Full backup to external drive"
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echo " status - Show current LVM and snapshot status"
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echo " list - List current snapshots"
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echo " integrate - Integrate with existing backup system"
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echo
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echo "Examples:"
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echo " $0 backup # Create and mount snapshots"
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echo " $0 external # Full backup to external drive"
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echo " $0 remove # Clean up when backup complete"
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}
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main() {
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# Ensure log file exists and is writable
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sudo touch "$LOG_FILE" 2>/dev/null || LOG_FILE="/tmp/lvm-backup.log"
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case "${1:-}" in
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create)
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check_lvm_system
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create_snapshots
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;;
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mount)
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mount_snapshots
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;;
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remove)
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remove_snapshots
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;;
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backup)
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check_lvm_system
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create_snapshots
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mount_snapshots
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echo "Snapshots ready for backup at $BACKUP_BASE_DIR"
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echo "Run '$0 remove' when backup is complete"
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;;
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external)
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check_lvm_system
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create_snapshots
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mount_snapshots
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backup_to_external
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remove_snapshots
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;;
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status)
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show_status
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;;
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list)
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list_snapshots
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;;
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integrate)
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integrate_with_backup_system
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;;
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*)
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show_usage
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exit 1
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;;
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esac
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}
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# Check if running as root for LVM operations
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if [ "$EUID" -ne 0 ] && [[ "$1" =~ ^(create|mount|remove|backup|external)$ ]]; then
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error "LVM operations require root privileges. Use: sudo $0 $1"
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fi
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main "$@" |