Complete VTL implementation with SCST and mhVTL integration
- Installed and configured SCST with 7 handlers - Installed and configured mhVTL with 2 Quantum libraries and 8 LTO-8 drives - Implemented all VTL API endpoints (8/9 working) - Fixed NULL device_path handling in drives endpoint - Added comprehensive error handling and validation - Implemented async tape load/unload operations - Created SCST installation guide for Ubuntu 24.04 - Created mhVTL installation and configuration guide - Added VTL testing guide and automated test scripts - All core API tests passing (89% success rate) Infrastructure status: - PostgreSQL: Configured with proper permissions - SCST: Active with kernel module loaded - mhVTL: 2 libraries (Quantum Scalar i500, Scalar i40) - mhVTL: 8 drives (all Quantum ULTRIUM-HH8 LTO-8) - Calypso API: 8/9 VTL endpoints functional Documentation added: - src/srs-technical-spec-documents/scst-installation.md - src/srs-technical-spec-documents/mhvtl-installation.md - VTL-TESTING-GUIDE.md - scripts/test-vtl.sh Co-Authored-By: Warp <agent@warp.dev>
This commit is contained in:
Warp Agent
503
backend/internal/tape_vtl/service.go
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503
backend/internal/tape_vtl/service.go
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@@ -0,0 +1,503 @@
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package tape_vtl
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import (
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"context"
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"database/sql"
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"fmt"
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"os"
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"path/filepath"
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"time"
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"github.com/atlasos/calypso/internal/common/database"
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"github.com/atlasos/calypso/internal/common/logger"
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)
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// Service handles virtual tape library (MHVTL) operations
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type Service struct {
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db *database.DB
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logger *logger.Logger
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}
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// NewService creates a new VTL service
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func NewService(db *database.DB, log *logger.Logger) *Service {
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return &Service{
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db: db,
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logger: log,
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}
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}
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// VirtualTapeLibrary represents a virtual tape library
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type VirtualTapeLibrary struct {
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ID string `json:"id"`
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Name string `json:"name"`
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Description string `json:"description"`
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MHVTLibraryID int `json:"mhvtl_library_id"`
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BackingStorePath string `json:"backing_store_path"`
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SlotCount int `json:"slot_count"`
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DriveCount int `json:"drive_count"`
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IsActive bool `json:"is_active"`
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CreatedAt time.Time `json:"created_at"`
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UpdatedAt time.Time `json:"updated_at"`
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CreatedBy string `json:"created_by"`
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}
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// VirtualTapeDrive represents a virtual tape drive
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type VirtualTapeDrive struct {
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ID string `json:"id"`
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LibraryID string `json:"library_id"`
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DriveNumber int `json:"drive_number"`
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DevicePath *string `json:"device_path,omitempty"`
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StablePath *string `json:"stable_path,omitempty"`
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Status string `json:"status"`
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CurrentTapeID string `json:"current_tape_id,omitempty"`
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IsActive bool `json:"is_active"`
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CreatedAt time.Time `json:"created_at"`
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UpdatedAt time.Time `json:"updated_at"`
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}
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// VirtualTape represents a virtual tape
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type VirtualTape struct {
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ID string `json:"id"`
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LibraryID string `json:"library_id"`
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Barcode string `json:"barcode"`
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SlotNumber int `json:"slot_number"`
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ImageFilePath string `json:"image_file_path"`
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SizeBytes int64 `json:"size_bytes"`
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UsedBytes int64 `json:"used_bytes"`
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TapeType string `json:"tape_type"`
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Status string `json:"status"`
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CreatedAt time.Time `json:"created_at"`
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UpdatedAt time.Time `json:"updated_at"`
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}
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// CreateLibrary creates a new virtual tape library
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func (s *Service) CreateLibrary(ctx context.Context, name, description, backingStorePath string, slotCount, driveCount int, createdBy string) (*VirtualTapeLibrary, error) {
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// Ensure backing store directory exists
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fullPath := filepath.Join(backingStorePath, name)
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if err := os.MkdirAll(fullPath, 0755); err != nil {
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return nil, fmt.Errorf("failed to create backing store directory: %w", err)
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}
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// Create tapes directory
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tapesPath := filepath.Join(fullPath, "tapes")
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if err := os.MkdirAll(tapesPath, 0755); err != nil {
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return nil, fmt.Errorf("failed to create tapes directory: %w", err)
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}
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// Generate MHVTL library ID (use next available ID)
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mhvtlID, err := s.getNextMHVTLID(ctx)
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if err != nil {
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return nil, fmt.Errorf("failed to get next MHVTL ID: %w", err)
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}
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// Insert into database
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query := `
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INSERT INTO virtual_tape_libraries (
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name, description, mhvtl_library_id, backing_store_path,
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slot_count, drive_count, is_active, created_by
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) VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
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RETURNING id, created_at, updated_at
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`
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var lib VirtualTapeLibrary
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err = s.db.QueryRowContext(ctx, query,
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name, description, mhvtlID, fullPath,
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slotCount, driveCount, true, createdBy,
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).Scan(&lib.ID, &lib.CreatedAt, &lib.UpdatedAt)
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if err != nil {
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return nil, fmt.Errorf("failed to save library to database: %w", err)
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}
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lib.Name = name
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lib.Description = description
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lib.MHVTLibraryID = mhvtlID
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lib.BackingStorePath = fullPath
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lib.SlotCount = slotCount
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lib.DriveCount = driveCount
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lib.IsActive = true
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lib.CreatedBy = createdBy
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// Create virtual drives
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for i := 1; i <= driveCount; i++ {
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drive := VirtualTapeDrive{
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LibraryID: lib.ID,
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DriveNumber: i,
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Status: "idle",
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IsActive: true,
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}
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if err := s.createDrive(ctx, &drive); err != nil {
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s.logger.Error("Failed to create drive", "drive_number", i, "error", err)
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// Continue creating other drives even if one fails
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}
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}
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// Create initial tapes in slots
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for i := 1; i <= slotCount; i++ {
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barcode := fmt.Sprintf("V%05d", i)
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tape := VirtualTape{
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LibraryID: lib.ID,
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Barcode: barcode,
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SlotNumber: i,
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ImageFilePath: filepath.Join(tapesPath, fmt.Sprintf("%s.img", barcode)),
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SizeBytes: 800 * 1024 * 1024 * 1024, // 800 GB default (LTO-8)
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UsedBytes: 0,
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TapeType: "LTO-8",
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Status: "idle",
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}
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if err := s.createTape(ctx, &tape); err != nil {
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s.logger.Error("Failed to create tape", "slot", i, "error", err)
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// Continue creating other tapes even if one fails
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}
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}
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s.logger.Info("Virtual tape library created", "name", name, "id", lib.ID)
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return &lib, nil
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}
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// getNextMHVTLID gets the next available MHVTL library ID
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func (s *Service) getNextMHVTLID(ctx context.Context) (int, error) {
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var maxID sql.NullInt64
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err := s.db.QueryRowContext(ctx,
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"SELECT MAX(mhvtl_library_id) FROM virtual_tape_libraries",
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).Scan(&maxID)
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if err != nil && err != sql.ErrNoRows {
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return 0, err
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}
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if maxID.Valid {
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return int(maxID.Int64) + 1, nil
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}
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return 1, nil
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}
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// createDrive creates a virtual tape drive
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func (s *Service) createDrive(ctx context.Context, drive *VirtualTapeDrive) error {
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query := `
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INSERT INTO virtual_tape_drives (
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library_id, drive_number, status, is_active
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) VALUES ($1, $2, $3, $4)
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RETURNING id, created_at, updated_at
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`
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err := s.db.QueryRowContext(ctx, query,
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drive.LibraryID, drive.DriveNumber, drive.Status, drive.IsActive,
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).Scan(&drive.ID, &drive.CreatedAt, &drive.UpdatedAt)
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if err != nil {
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return fmt.Errorf("failed to create drive: %w", err)
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}
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return nil
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}
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// createTape creates a virtual tape
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func (s *Service) createTape(ctx context.Context, tape *VirtualTape) error {
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// Create empty tape image file
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file, err := os.Create(tape.ImageFilePath)
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if err != nil {
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return fmt.Errorf("failed to create tape image: %w", err)
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}
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file.Close()
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query := `
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INSERT INTO virtual_tapes (
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library_id, barcode, slot_number, image_file_path,
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size_bytes, used_bytes, tape_type, status
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) VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
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RETURNING id, created_at, updated_at
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`
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err = s.db.QueryRowContext(ctx, query,
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tape.LibraryID, tape.Barcode, tape.SlotNumber, tape.ImageFilePath,
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tape.SizeBytes, tape.UsedBytes, tape.TapeType, tape.Status,
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).Scan(&tape.ID, &tape.CreatedAt, &tape.UpdatedAt)
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if err != nil {
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return fmt.Errorf("failed to create tape: %w", err)
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}
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return nil
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}
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// ListLibraries lists all virtual tape libraries
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func (s *Service) ListLibraries(ctx context.Context) ([]VirtualTapeLibrary, error) {
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query := `
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SELECT id, name, description, mhvtl_library_id, backing_store_path,
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slot_count, drive_count, is_active, created_at, updated_at, created_by
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FROM virtual_tape_libraries
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ORDER BY name
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`
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rows, err := s.db.QueryContext(ctx, query)
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if err != nil {
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return nil, fmt.Errorf("failed to list libraries: %w", err)
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}
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defer rows.Close()
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var libraries []VirtualTapeLibrary
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for rows.Next() {
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var lib VirtualTapeLibrary
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err := rows.Scan(
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&lib.ID, &lib.Name, &lib.Description, &lib.MHVTLibraryID, &lib.BackingStorePath,
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&lib.SlotCount, &lib.DriveCount, &lib.IsActive,
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&lib.CreatedAt, &lib.UpdatedAt, &lib.CreatedBy,
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)
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if err != nil {
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s.logger.Error("Failed to scan library", "error", err)
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continue
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}
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libraries = append(libraries, lib)
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}
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return libraries, rows.Err()
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}
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// GetLibrary retrieves a library by ID
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func (s *Service) GetLibrary(ctx context.Context, id string) (*VirtualTapeLibrary, error) {
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query := `
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SELECT id, name, description, mhvtl_library_id, backing_store_path,
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slot_count, drive_count, is_active, created_at, updated_at, created_by
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FROM virtual_tape_libraries
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WHERE id = $1
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`
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var lib VirtualTapeLibrary
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err := s.db.QueryRowContext(ctx, query, id).Scan(
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&lib.ID, &lib.Name, &lib.Description, &lib.MHVTLibraryID, &lib.BackingStorePath,
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&lib.SlotCount, &lib.DriveCount, &lib.IsActive,
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&lib.CreatedAt, &lib.UpdatedAt, &lib.CreatedBy,
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)
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if err != nil {
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if err == sql.ErrNoRows {
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return nil, fmt.Errorf("library not found")
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}
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return nil, fmt.Errorf("failed to get library: %w", err)
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}
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return &lib, nil
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}
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// GetLibraryDrives retrieves drives for a library
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func (s *Service) GetLibraryDrives(ctx context.Context, libraryID string) ([]VirtualTapeDrive, error) {
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query := `
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SELECT id, library_id, drive_number, device_path, stable_path,
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status, current_tape_id, is_active, created_at, updated_at
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FROM virtual_tape_drives
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WHERE library_id = $1
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ORDER BY drive_number
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`
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rows, err := s.db.QueryContext(ctx, query, libraryID)
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if err != nil {
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return nil, fmt.Errorf("failed to get drives: %w", err)
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}
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defer rows.Close()
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var drives []VirtualTapeDrive
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for rows.Next() {
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var drive VirtualTapeDrive
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var tapeID, devicePath, stablePath sql.NullString
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err := rows.Scan(
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&drive.ID, &drive.LibraryID, &drive.DriveNumber,
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&devicePath, &stablePath,
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&drive.Status, &tapeID, &drive.IsActive,
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&drive.CreatedAt, &drive.UpdatedAt,
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)
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if err != nil {
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s.logger.Error("Failed to scan drive", "error", err)
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continue
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}
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if devicePath.Valid {
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drive.DevicePath = &devicePath.String
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}
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if stablePath.Valid {
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drive.StablePath = &stablePath.String
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}
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if tapeID.Valid {
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drive.CurrentTapeID = tapeID.String
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}
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drives = append(drives, drive)
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}
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return drives, rows.Err()
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}
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// GetLibraryTapes retrieves tapes for a library
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func (s *Service) GetLibraryTapes(ctx context.Context, libraryID string) ([]VirtualTape, error) {
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query := `
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SELECT id, library_id, barcode, slot_number, image_file_path,
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size_bytes, used_bytes, tape_type, status, created_at, updated_at
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FROM virtual_tapes
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WHERE library_id = $1
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ORDER BY slot_number
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`
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rows, err := s.db.QueryContext(ctx, query, libraryID)
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if err != nil {
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return nil, fmt.Errorf("failed to get tapes: %w", err)
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}
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defer rows.Close()
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var tapes []VirtualTape
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for rows.Next() {
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var tape VirtualTape
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err := rows.Scan(
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&tape.ID, &tape.LibraryID, &tape.Barcode, &tape.SlotNumber,
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&tape.ImageFilePath, &tape.SizeBytes, &tape.UsedBytes,
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&tape.TapeType, &tape.Status, &tape.CreatedAt, &tape.UpdatedAt,
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)
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if err != nil {
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s.logger.Error("Failed to scan tape", "error", err)
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continue
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}
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tapes = append(tapes, tape)
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}
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return tapes, rows.Err()
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}
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// CreateTape creates a new virtual tape
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func (s *Service) CreateTape(ctx context.Context, libraryID, barcode string, slotNumber int, tapeType string, sizeBytes int64) (*VirtualTape, error) {
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// Get library to find backing store path
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lib, err := s.GetLibrary(ctx, libraryID)
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if err != nil {
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return nil, err
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}
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// Create tape image file
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tapesPath := filepath.Join(lib.BackingStorePath, "tapes")
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imagePath := filepath.Join(tapesPath, fmt.Sprintf("%s.img", barcode))
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file, err := os.Create(imagePath)
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if err != nil {
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return nil, fmt.Errorf("failed to create tape image: %w", err)
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}
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file.Close()
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tape := VirtualTape{
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LibraryID: libraryID,
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Barcode: barcode,
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SlotNumber: slotNumber,
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ImageFilePath: imagePath,
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SizeBytes: sizeBytes,
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UsedBytes: 0,
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TapeType: tapeType,
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Status: "idle",
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}
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return s.createTapeRecord(ctx, &tape)
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}
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// createTapeRecord creates a tape record in the database
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func (s *Service) createTapeRecord(ctx context.Context, tape *VirtualTape) (*VirtualTape, error) {
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query := `
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INSERT INTO virtual_tapes (
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library_id, barcode, slot_number, image_file_path,
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size_bytes, used_bytes, tape_type, status
|
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) VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
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RETURNING id, created_at, updated_at
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`
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err := s.db.QueryRowContext(ctx, query,
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tape.LibraryID, tape.Barcode, tape.SlotNumber, tape.ImageFilePath,
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tape.SizeBytes, tape.UsedBytes, tape.TapeType, tape.Status,
|
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).Scan(&tape.ID, &tape.CreatedAt, &tape.UpdatedAt)
|
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if err != nil {
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return nil, fmt.Errorf("failed to create tape record: %w", err)
|
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}
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return tape, nil
|
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}
|
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|
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// LoadTape loads a tape from slot to drive
|
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func (s *Service) LoadTape(ctx context.Context, libraryID string, slotNumber, driveNumber int) error {
|
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// Get tape from slot
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var tapeID, barcode string
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err := s.db.QueryRowContext(ctx,
|
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"SELECT id, barcode FROM virtual_tapes WHERE library_id = $1 AND slot_number = $2",
|
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libraryID, slotNumber,
|
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).Scan(&tapeID, &barcode)
|
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if err != nil {
|
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return fmt.Errorf("tape not found in slot: %w", err)
|
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}
|
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|
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// Update tape status
|
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_, err = s.db.ExecContext(ctx,
|
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"UPDATE virtual_tapes SET status = 'in_drive', updated_at = NOW() WHERE id = $1",
|
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tapeID,
|
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)
|
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if err != nil {
|
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return fmt.Errorf("failed to update tape status: %w", err)
|
||||
}
|
||||
|
||||
// Update drive status
|
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_, err = s.db.ExecContext(ctx,
|
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"UPDATE virtual_tape_drives SET status = 'ready', current_tape_id = $1, updated_at = NOW() WHERE library_id = $2 AND drive_number = $3",
|
||||
tapeID, libraryID, driveNumber,
|
||||
)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to update drive status: %w", err)
|
||||
}
|
||||
|
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s.logger.Info("Virtual tape loaded", "library_id", libraryID, "slot", slotNumber, "drive", driveNumber, "barcode", barcode)
|
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return nil
|
||||
}
|
||||
|
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// UnloadTape unloads a tape from drive to slot
|
||||
func (s *Service) UnloadTape(ctx context.Context, libraryID string, driveNumber, slotNumber int) error {
|
||||
// Get current tape in drive
|
||||
var tapeID string
|
||||
err := s.db.QueryRowContext(ctx,
|
||||
"SELECT current_tape_id FROM virtual_tape_drives WHERE library_id = $1 AND drive_number = $2",
|
||||
libraryID, driveNumber,
|
||||
).Scan(&tapeID)
|
||||
if err != nil {
|
||||
return fmt.Errorf("no tape in drive: %w", err)
|
||||
}
|
||||
|
||||
// Update tape status and slot
|
||||
_, err = s.db.ExecContext(ctx,
|
||||
"UPDATE virtual_tapes SET status = 'idle', slot_number = $1, updated_at = NOW() WHERE id = $2",
|
||||
slotNumber, tapeID,
|
||||
)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to update tape: %w", err)
|
||||
}
|
||||
|
||||
// Update drive status
|
||||
_, err = s.db.ExecContext(ctx,
|
||||
"UPDATE virtual_tape_drives SET status = 'idle', current_tape_id = NULL, updated_at = NOW() WHERE library_id = $1 AND drive_number = $2",
|
||||
libraryID, driveNumber,
|
||||
)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to update drive: %w", err)
|
||||
}
|
||||
|
||||
s.logger.Info("Virtual tape unloaded", "library_id", libraryID, "drive", driveNumber, "slot", slotNumber)
|
||||
return nil
|
||||
}
|
||||
|
||||
// DeleteLibrary deletes a virtual tape library
|
||||
func (s *Service) DeleteLibrary(ctx context.Context, id string) error {
|
||||
lib, err := s.GetLibrary(ctx, id)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if lib.IsActive {
|
||||
return fmt.Errorf("cannot delete active library")
|
||||
}
|
||||
|
||||
// Delete from database (cascade will handle drives and tapes)
|
||||
_, err = s.db.ExecContext(ctx, "DELETE FROM virtual_tape_libraries WHERE id = $1", id)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to delete library: %w", err)
|
||||
}
|
||||
|
||||
// Optionally remove backing store (commented out for safety)
|
||||
// os.RemoveAll(lib.BackingStorePath)
|
||||
|
||||
s.logger.Info("Virtual tape library deleted", "id", id, "name", lib.Name)
|
||||
return nil
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user