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feat: Refactor backup script to initialize performance log file and ensure full backups every time
This commit is contained in:
Peter Wood
100
backup-plex.sh
100
backup-plex.sh
@@ -23,9 +23,10 @@ MAX_BACKUPS_TO_KEEP=10
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BACKUP_ROOT="/mnt/share/media/backups/plex"
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LOG_ROOT="/mnt/share/media/backups/logs"
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SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
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JSON_LOG_FILE="${SCRIPT_DIR}/logs/plex-backup.json"
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PERFORMANCE_LOG_FILE="${SCRIPT_DIR}/logs/plex-backup-performance.json"
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# Backup strategy configuration - Always perform full backups
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# Plex SQLite path (custom Plex SQLite binary)
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PLEX_SQLITE="/usr/lib/plexmediaserver/Plex SQLite"
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@@ -81,6 +82,7 @@ while [[ $# -gt 0 ]]; do
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echo " --webhook=URL Send notifications to webhook URL"
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echo " --email=ADDRESS Send notifications to email address"
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echo " -h, --help Show this help message"
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echo ""
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exit 0
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;;
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*)
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@@ -170,48 +172,15 @@ track_performance() {
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log_info "Performance: $operation completed in ${duration}s"
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}
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# Initialize JSON log file
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initialize_json_log() {
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if [ ! -f "${JSON_LOG_FILE}" ] || ! jq empty "${JSON_LOG_FILE}" 2>/dev/null; then
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echo "{}" > "${JSON_LOG_FILE}"
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log_message "Initialized JSON log file"
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# Initialize log directory
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initialize_logs() {
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mkdir -p "$(dirname "$PERFORMANCE_LOG_FILE")"
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if [ ! -f "$PERFORMANCE_LOG_FILE" ]; then
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echo "[]" > "$PERFORMANCE_LOG_FILE"
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log_message "Initialized performance log file"
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fi
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}
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# Check if file needs backup based on modification time
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needs_backup() {
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local file="$1"
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if [ ! -f "$file" ]; then
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log_warning "File not found: $file"
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return 1
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fi
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local current_mod_date=$(stat -c %Y "$file")
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local last_backup_date=$(jq -r --arg file "$file" '.[$file] // 0' "${JSON_LOG_FILE}")
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if [ "$last_backup_date" == "null" ] || [ "$last_backup_date" == "0" ]; then
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log_message "File has never been backed up: $(basename "$file")"
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return 0
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fi
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if [ "$current_mod_date" -gt "$last_backup_date" ]; then
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log_message "File modified since last backup: $(basename "$file")"
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return 0
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fi
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log_message "File unchanged since last backup: $(basename "$file")"
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return 1
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}
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# Update backup time in JSON log
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update_backup_time() {
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local file="$1"
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local timestamp="$2"
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jq --arg file "$file" --arg timestamp "$timestamp" '.[$file] = ($timestamp | tonumber)' "${JSON_LOG_FILE}" > "${JSON_LOG_FILE}.tmp" && mv "${JSON_LOG_FILE}.tmp" "${JSON_LOG_FILE}"
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}
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# Enhanced notification system
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send_notification() {
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local title="$1"
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@@ -754,7 +723,7 @@ estimate_backup_size() {
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for nickname in "${!PLEX_FILES[@]}"; do
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local file="${PLEX_FILES[$nickname]}"
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if [ -f "$file" ] && needs_backup "$file" >/dev/null 2>&1; then
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if [ -f "$file" ]; then
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local size_kb=$(du -k "$file" 2>/dev/null | cut -f1)
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total_size=$((total_size + size_kb))
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fi
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@@ -907,8 +876,8 @@ main() {
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mkdir -p "${BACKUP_ROOT}"
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mkdir -p "${LOG_ROOT}"
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# Initialize JSON log
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initialize_json_log
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# Initialize logs
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initialize_logs
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# Check if only doing integrity check
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if [ "$INTEGRITY_CHECK_ONLY" = true ]; then
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@@ -983,43 +952,34 @@ main() {
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# Handle WAL files backup
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handle_wal_files "backup" "$BACKUP_PATH"
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# Backup files
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# Backup files - always perform full backup
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local backup_start=$(date +%s)
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for nickname in "${!PLEX_FILES[@]}"; do
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local file="${PLEX_FILES[$nickname]}"
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if [ -f "$file" ]; then
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if needs_backup "$file" ]; then
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log_message "Backing up: $(basename "$file")"
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log_message "Backing up: $(basename "$file")"
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# Create backup filename without timestamp (use original filename)
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local backup_file="${BACKUP_PATH}/$(basename "$file")"
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# Copy file
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if sudo cp "$file" "$backup_file"; then
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log_success "Copied: $(basename "$file")"
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# Create backup filename without timestamp (use original filename)
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local backup_file="${BACKUP_PATH}/$(basename "$file")"
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# Copy file
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if sudo cp "$file" "$backup_file"; then
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log_success "Copied: $(basename "$file")"
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# Verify backup
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if verify_backup "$file" "$backup_file"; then
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log_success "Verified: $(basename "$file")"
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# Update backup time in JSON log
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local current_timestamp=$(date +%s)
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update_backup_time "$file" "$current_timestamp"
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files_backed_up=$((files_backed_up + 1))
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else
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log_error "Verification failed: $(basename "$file")"
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backup_errors=$((backup_errors + 1))
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# Remove failed backup
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rm -f "$backup_file"
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fi
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# Verify backup
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if verify_backup "$file" "$backup_file"; then
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log_success "Verified: $(basename "$file")"
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files_backed_up=$((files_backed_up + 1))
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else
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log_error "Failed to copy: $(basename "$file")"
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log_error "Verification failed: $(basename "$file")"
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backup_errors=$((backup_errors + 1))
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# Remove failed backup
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rm -f "$backup_file"
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fi
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else
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log_message "Skipping unchanged file: $(basename "$file")"
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log_error "Failed to copy: $(basename "$file")"
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backup_errors=$((backup_errors + 1))
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fi
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else
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log_warning "File not found: $file"
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