mirror of
https://github.com/rclone/rclone.git
synced 2024-12-22 15:11:56 +01:00
serve nbd: serve an rclone remote as a Network Block Device - WIP FIXME
TODO - Need to finalise rclone/gonbdserver and upload and change go.mod/go.sum - Remove uneeded dependencies from rclone/gonbdserver Maybe make companion `mount nbd` command? Fixes #7337
This commit is contained in:
Nick Craig-Wood
parent
9fb0afad88
commit
3fa5a424a9
140
cmd/serve/nbd/chunked_backend.go
Normal file
140
cmd/serve/nbd/chunked_backend.go
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@ -0,0 +1,140 @@
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// Implements an nbd.Backend for serving from a chunked file in the VFS.
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package nbd
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import (
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"errors"
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"fmt"
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"github.com/rclone/gonbdserver/nbd"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/fs/log"
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"github.com/rclone/rclone/vfs/chunked"
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"golang.org/x/net/context"
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)
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// Backend for a single chunked file
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type chunkedBackend struct {
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file *chunked.File
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ec *nbd.ExportConfig
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}
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// Create Backend for a single chunked file
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type chunkedBackendFactory struct {
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s *NBD
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file *chunked.File
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}
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// WriteAt implements Backend.WriteAt
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func (cb *chunkedBackend) WriteAt(ctx context.Context, b []byte, offset int64, fua bool) (n int, err error) {
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defer log.Trace(logPrefix, "size=%d, off=%d", len(b), offset)("n=%d, err=%v", &n, &err)
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n, err = cb.file.WriteAt(b, offset)
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if err != nil || !fua {
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return n, err
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}
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err = cb.file.Sync()
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if err != nil {
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return 0, err
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}
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return n, err
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}
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// ReadAt implements Backend.ReadAt
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func (cb *chunkedBackend) ReadAt(ctx context.Context, b []byte, offset int64) (n int, err error) {
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defer log.Trace(logPrefix, "size=%d, off=%d", len(b), offset)("n=%d, err=%v", &n, &err)
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return cb.file.ReadAt(b, offset)
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}
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// TrimAt implements Backend.TrimAt
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func (cb *chunkedBackend) TrimAt(ctx context.Context, length int, offset int64) (n int, err error) {
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defer log.Trace(logPrefix, "size=%d, off=%d", length, offset)("n=%d, err=%v", &n, &err)
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return length, nil
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}
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// Flush implements Backend.Flush
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func (cb *chunkedBackend) Flush(ctx context.Context) (err error) {
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defer log.Trace(logPrefix, "")("err=%v", &err)
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return nil
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}
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// Close implements Backend.Close
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func (cb *chunkedBackend) Close(ctx context.Context) (err error) {
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defer log.Trace(logPrefix, "")("err=%v", &err)
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err = cb.file.Close()
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return nil
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}
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// Geometry implements Backend.Geometry
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func (cb *chunkedBackend) Geometry(ctx context.Context) (size uint64, minBS uint64, prefBS uint64, maxBS uint64, err error) {
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defer log.Trace(logPrefix, "")("size=%d, minBS=%d, prefBS=%d, maxBS=%d, err=%v", &size, &minBS, &prefBS, &maxBS, &err)
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size = uint64(cb.file.Size())
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minBS = cb.ec.MinimumBlockSize
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prefBS = cb.ec.PreferredBlockSize
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maxBS = cb.ec.MaximumBlockSize
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err = nil
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return
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}
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// HasFua implements Backend.HasFua
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func (cb *chunkedBackend) HasFua(ctx context.Context) (fua bool) {
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defer log.Trace(logPrefix, "")("fua=%v", &fua)
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return true
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}
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// HasFlush implements Backend.HasFua
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func (cb *chunkedBackend) HasFlush(ctx context.Context) (flush bool) {
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defer log.Trace(logPrefix, "")("flush=%v", &flush)
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return true
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}
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// New generates a new chunked backend
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func (cbf *chunkedBackendFactory) newBackend(ctx context.Context, ec *nbd.ExportConfig) (nbd.Backend, error) {
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err := cbf.file.Open(false, 0)
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if err != nil {
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return nil, fmt.Errorf("failed to open chunked file: %w", err)
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}
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cb := &chunkedBackend{
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file: cbf.file,
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ec: ec,
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}
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return cb, nil
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}
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// Generate a chunked backend factory
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func (s *NBD) newChunkedBackendFactory(ctx context.Context) (bf backendFactory, err error) {
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create := s.opt.Create > 0
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if s.vfs.Opt.ReadOnly && create {
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return nil, errors.New("can't create files with --read-only")
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}
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file := chunked.New(s.vfs, s.leaf)
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err = file.Open(create, s.log2ChunkSize)
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if err != nil {
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return nil, fmt.Errorf("failed to open chunked file: %w", err)
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}
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defer fs.CheckClose(file, &err)
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var truncateSize fs.SizeSuffix
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if create {
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if file.Size() == 0 {
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truncateSize = s.opt.Create
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}
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} else {
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truncateSize = s.opt.Resize
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}
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if truncateSize > 0 {
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err = file.Truncate(int64(truncateSize))
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if err != nil {
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return nil, fmt.Errorf("failed to create chunked file: %w", err)
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}
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fs.Logf(logPrefix, "Size of network block device is now %v", truncateSize)
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}
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return &chunkedBackendFactory{
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s: s,
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file: file,
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}, nil
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}
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// Check interfaces
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var (
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_ nbd.Backend = (*chunkedBackend)(nil)
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_ backendFactory = (*chunkedBackendFactory)(nil)
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)
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140
cmd/serve/nbd/file_backend.go
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140
cmd/serve/nbd/file_backend.go
Normal file
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// Implements an nbd.Backend for serving from the VFS.
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package nbd
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import (
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"fmt"
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"os"
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"github.com/rclone/gonbdserver/nbd"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/fs/log"
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"github.com/rclone/rclone/vfs"
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"golang.org/x/net/context"
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)
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// Backend for a single file
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type fileBackend struct {
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file vfs.Handle
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ec *nbd.ExportConfig
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}
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// Create Backend for a single file
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type fileBackendFactory struct {
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s *NBD
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vfs *vfs.VFS
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filePath string
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perms int
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}
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// WriteAt implements Backend.WriteAt
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func (fb *fileBackend) WriteAt(ctx context.Context, b []byte, offset int64, fua bool) (n int, err error) {
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defer log.Trace(logPrefix, "size=%d, off=%d", len(b), offset)("n=%d, err=%v", &n, &err)
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n, err = fb.file.WriteAt(b, offset)
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if err != nil || !fua {
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return n, err
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}
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err = fb.file.Sync()
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if err != nil {
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return 0, err
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}
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return n, err
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}
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// ReadAt implements Backend.ReadAt
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func (fb *fileBackend) ReadAt(ctx context.Context, b []byte, offset int64) (n int, err error) {
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defer log.Trace(logPrefix, "size=%d, off=%d", len(b), offset)("n=%d, err=%v", &n, &err)
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return fb.file.ReadAt(b, offset)
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}
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// TrimAt implements Backend.TrimAt
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func (fb *fileBackend) TrimAt(ctx context.Context, length int, offset int64) (n int, err error) {
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defer log.Trace(logPrefix, "size=%d, off=%d", length, offset)("n=%d, err=%v", &n, &err)
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return length, nil
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}
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// Flush implements Backend.Flush
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func (fb *fileBackend) Flush(ctx context.Context) (err error) {
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defer log.Trace(logPrefix, "")("err=%v", &err)
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return nil
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}
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// Close implements Backend.Close
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func (fb *fileBackend) Close(ctx context.Context) (err error) {
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defer log.Trace(logPrefix, "")("err=%v", &err)
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err = fb.file.Close()
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return nil
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}
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// Geometry implements Backend.Geometry
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func (fb *fileBackend) Geometry(ctx context.Context) (size uint64, minBS uint64, prefBS uint64, maxBS uint64, err error) {
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defer log.Trace(logPrefix, "")("size=%d, minBS=%d, prefBS=%d, maxBS=%d, err=%v", &size, &minBS, &prefBS, &maxBS, &err)
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fi, err := fb.file.Stat()
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if err != nil {
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err = fmt.Errorf("failed read info about open backing file: %w", err)
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return
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}
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size = uint64(fi.Size())
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minBS = fb.ec.MinimumBlockSize
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prefBS = fb.ec.PreferredBlockSize
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maxBS = fb.ec.MaximumBlockSize
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err = nil
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return
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}
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// HasFua implements Backend.HasFua
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func (fb *fileBackend) HasFua(ctx context.Context) (fua bool) {
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defer log.Trace(logPrefix, "")("fua=%v", &fua)
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return true
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}
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// HasFlush implements Backend.HasFua
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func (fb *fileBackend) HasFlush(ctx context.Context) (flush bool) {
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defer log.Trace(logPrefix, "")("flush=%v", &flush)
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return true
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}
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// open the backing file
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func (fbf *fileBackendFactory) open() (vfs.Handle, error) {
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return fbf.vfs.OpenFile(fbf.filePath, fbf.perms, 0700)
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}
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// New generates a new file backend
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func (fbf *fileBackendFactory) newBackend(ctx context.Context, ec *nbd.ExportConfig) (nbd.Backend, error) {
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fd, err := fbf.open()
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if err != nil {
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return nil, fmt.Errorf("failed to open backing file: %w", err)
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}
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fb := &fileBackend{
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file: fd,
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ec: ec,
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}
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return fb, nil
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}
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// Generate a file backend factory
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func (s *NBD) newFileBackendFactory(ctx context.Context) (bf backendFactory, err error) {
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perms := os.O_RDWR
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if s.vfs.Opt.ReadOnly {
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perms = os.O_RDONLY
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}
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fbf := &fileBackendFactory{
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s: s,
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vfs: s.vfs,
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perms: perms,
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filePath: s.leaf,
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}
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// Try opening the file so we get errors now rather than later when they are more difficult to report.
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fd, err := fbf.open()
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if err != nil {
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return nil, fmt.Errorf("failed to open backing file: %w", err)
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}
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defer fs.CheckClose(fd, &err)
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return fbf, nil
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}
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// Check interfaces
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var (
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_ nbd.Backend = (*fileBackend)(nil)
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_ backendFactory = (*fileBackendFactory)(nil)
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)
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260
cmd/serve/nbd/nbd.go
Normal file
260
cmd/serve/nbd/nbd.go
Normal file
@ -0,0 +1,260 @@
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// Package nbd provides a network block device server
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package nbd
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import (
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"bufio"
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"context"
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_ "embed"
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"errors"
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"fmt"
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"io"
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"log"
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"math/bits"
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"path/filepath"
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"strings"
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"sync"
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"github.com/rclone/gonbdserver/nbd"
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"github.com/rclone/rclone/cmd"
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"github.com/rclone/rclone/cmd/serve/proxy/proxyflags"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/fs/config/flags"
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"github.com/rclone/rclone/lib/systemd"
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"github.com/rclone/rclone/vfs"
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"github.com/rclone/rclone/vfs/vfscommon"
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"github.com/rclone/rclone/vfs/vfsflags"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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)
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const logPrefix = "nbd"
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// OptionsInfo descripts the Options in use
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var OptionsInfo = fs.Options{{
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Name: "addr",
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Default: "localhost:10809",
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Help: "IPaddress:Port or :Port to bind server to",
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}, {
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Name: "min_block_size",
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Default: fs.SizeSuffix(512), // FIXME
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Help: "Minimum block size to advertise",
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}, {
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Name: "preferred_block_size",
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Default: fs.SizeSuffix(4096), // FIXME this is the max according to nbd-client
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Help: "Preferred block size to advertise",
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}, {
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Name: "max_block_size",
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Default: fs.SizeSuffix(1024 * 1024), // FIXME,
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Help: "Maximum block size to advertise",
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}, {
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Name: "create",
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Default: fs.SizeSuffix(-1),
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Help: "If the destination does not exist, create it with this size",
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}, {
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Name: "chunk_size",
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Default: fs.SizeSuffix(0),
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Help: "If creating the destination use this chunk size. Must be a power of 2.",
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}, {
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Name: "resize",
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Default: fs.SizeSuffix(-1),
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Help: "If the destination exists, resize it to this size",
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}}
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// name := flag.String("name", "default", "Export name")
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// description := flag.String("description", "The default export", "Export description")
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// Options required for nbd server
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type Options struct {
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ListenAddr string `config:"addr"` // Port to listen on
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MinBlockSize fs.SizeSuffix `config:"min_block_size"`
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PreferredBlockSize fs.SizeSuffix `config:"preferred_block_size"`
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MaxBlockSize fs.SizeSuffix `config:"max_block_size"`
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Create fs.SizeSuffix `config:"create"`
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ChunkSize fs.SizeSuffix `config:"chunk_size"`
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Resize fs.SizeSuffix `config:"resize"`
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}
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func init() {
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fs.RegisterGlobalOptions(fs.OptionsInfo{Name: "nbd", Opt: &Opt, Options: OptionsInfo})
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}
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// Opt is options set by command line flags
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var Opt Options
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// AddFlags adds flags for the nbd
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func AddFlags(flagSet *pflag.FlagSet, Opt *Options) {
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flags.AddFlagsFromOptions(flagSet, "", OptionsInfo)
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}
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func init() {
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flagSet := Command.Flags()
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vfsflags.AddFlags(flagSet)
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proxyflags.AddFlags(flagSet)
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AddFlags(flagSet, &Opt)
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}
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//go:embed nbd.md
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var helpText string
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// Command definition for cobra
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var Command = &cobra.Command{
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Use: "nbd remote:path",
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Short: `Serve the remote over NBD.`,
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Long: helpText + vfs.Help(),
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Annotations: map[string]string{
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"versionIntroduced": "v1.65",
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"status": "experimental",
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},
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Run: func(command *cobra.Command, args []string) {
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// FIXME could serve more than one nbd?
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cmd.CheckArgs(1, 1, command, args)
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f, leaf := cmd.NewFsFile(args[0])
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cmd.Run(false, true, command, func() error {
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s, err := run(context.Background(), f, leaf, Opt)
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if err != nil {
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||||
log.Fatal(err)
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||||
}
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||||
|
||||
defer systemd.Notify()()
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||||
// FIXME
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||||
_ = s
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||||
s.Wait()
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||||
return nil
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||||
})
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||||
},
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||||
}
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||||
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||||
// NBD contains everything to run the server
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||||
type NBD struct {
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||||
f fs.Fs
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||||
leaf string
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||||
vfs *vfs.VFS // don't use directly, use getVFS
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||||
opt Options
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||||
wg sync.WaitGroup
|
||||
sessionWaitGroup sync.WaitGroup
|
||||
logRd *io.PipeReader
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||||
logWr *io.PipeWriter
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||||
log2ChunkSize uint
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readOnly bool // Set for read only by vfs config
|
||||
|
||||
backendFactory backendFactory
|
||||
}
|
||||
|
||||
// interface for creating backend factories
|
||||
type backendFactory interface {
|
||||
newBackend(ctx context.Context, ec *nbd.ExportConfig) (nbd.Backend, error)
|
||||
}
|
||||
|
||||
// Create and start the server for nbd either on directory f or using file leaf in f
|
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func run(ctx context.Context, f fs.Fs, leaf string, opt Options) (s *NBD, err error) {
|
||||
s = &NBD{
|
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f: f,
|
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leaf: leaf,
|
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opt: opt,
|
||||
vfs: vfs.New(f, &vfscommon.Opt),
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||||
readOnly: vfscommon.Opt.ReadOnly,
|
||||
}
|
||||
|
||||
if opt.ChunkSize != 0 {
|
||||
if set := bits.OnesCount64(uint64(opt.ChunkSize)); set != 1 {
|
||||
return nil, fmt.Errorf("--chunk-size must be a power of 2 (counted %d bits set)", set)
|
||||
}
|
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s.log2ChunkSize = uint(bits.TrailingZeros64(uint64(opt.ChunkSize)))
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||||
fs.Debugf(logPrefix, "Using ChunkSize %v (%v), Log2ChunkSize %d", opt.ChunkSize, fs.SizeSuffix(1<<s.log2ChunkSize), s.log2ChunkSize)
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||||
}
|
||||
if !vfscommon.Opt.ReadOnly && vfscommon.Opt.CacheMode < vfscommon.CacheModeWrites {
|
||||
return nil, errors.New("need --vfs-cache-mode writes or full when serving read/write")
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||||
}
|
||||
|
||||
// Create the backend factory
|
||||
if leaf != "" {
|
||||
s.backendFactory, err = s.newFileBackendFactory(ctx)
|
||||
} else {
|
||||
s.backendFactory, err = s.newChunkedBackendFactory(ctx)
|
||||
}
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
nbd.RegisterBackend("rclone", s.backendFactory.newBackend)
|
||||
fs.Debugf(logPrefix, "Registered backends: %v", nbd.GetBackendNames())
|
||||
|
||||
var (
|
||||
protocol = "tcp"
|
||||
addr = Opt.ListenAddr
|
||||
)
|
||||
if strings.HasPrefix(addr, "unix://") || filepath.IsAbs(addr) {
|
||||
protocol = "unix"
|
||||
addr = strings.TrimPrefix(addr, "unix://")
|
||||
|
||||
}
|
||||
|
||||
ec := nbd.ExportConfig{
|
||||
Name: "default",
|
||||
Description: fs.ConfigString(f),
|
||||
Driver: "rclone",
|
||||
ReadOnly: vfscommon.Opt.ReadOnly,
|
||||
Workers: 8, // should this be --checkers or a new config flag FIXME
|
||||
TLSOnly: false, // FIXME
|
||||
MinimumBlockSize: uint64(Opt.MinBlockSize),
|
||||
PreferredBlockSize: uint64(Opt.PreferredBlockSize),
|
||||
MaximumBlockSize: uint64(Opt.MaxBlockSize),
|
||||
DriverParameters: nbd.DriverParametersConfig{
|
||||
"sync": "false",
|
||||
"path": "/tmp/diskimage",
|
||||
},
|
||||
}
|
||||
|
||||
// Make a logger to feed gonbdserver's logs into rclone's logging system
|
||||
s.logRd, s.logWr = io.Pipe()
|
||||
go func() {
|
||||
scanner := bufio.NewScanner(s.logRd)
|
||||
for scanner.Scan() {
|
||||
line := scanner.Text()
|
||||
if s, ok := strings.CutPrefix(line, "[DEBUG] "); ok {
|
||||
fs.Debugf(logPrefix, "%s", s)
|
||||
} else if s, ok := strings.CutPrefix(line, "[INFO] "); ok {
|
||||
fs.Infof(logPrefix, "%s", s)
|
||||
} else if s, ok := strings.CutPrefix(line, "[WARN] "); ok {
|
||||
fs.Logf(logPrefix, "%s", s)
|
||||
} else if s, ok := strings.CutPrefix(line, "[ERROR] "); ok {
|
||||
fs.Errorf(logPrefix, "%s", s)
|
||||
} else if s, ok := strings.CutPrefix(line, "[CRIT] "); ok {
|
||||
fs.Errorf(logPrefix, "%s", s)
|
||||
} else {
|
||||
fs.Infof(logPrefix, "%s", line)
|
||||
}
|
||||
}
|
||||
if err := scanner.Err(); err != nil {
|
||||
fs.Errorf(logPrefix, "Log writer failed: %v", err)
|
||||
}
|
||||
}()
|
||||
logger := log.New(s.logWr, "", 0)
|
||||
|
||||
ci := fs.GetConfig(ctx)
|
||||
dump := ci.Dump & (fs.DumpHeaders | fs.DumpBodies | fs.DumpAuth | fs.DumpRequests | fs.DumpResponses)
|
||||
var serverConfig = nbd.ServerConfig{
|
||||
Protocol: protocol, // protocol it should listen on (in net.Conn form)
|
||||
Address: addr, // address to listen on
|
||||
DefaultExport: "default", // name of default export
|
||||
Exports: []nbd.ExportConfig{ec}, // array of configurations of exported items
|
||||
//TLS: nbd.TLSConfig{}, // TLS configuration
|
||||
DisableNoZeroes: false, // Disable NoZereos extension FIXME
|
||||
Debug: dump != 0, // Verbose debug
|
||||
}
|
||||
s.wg.Add(1)
|
||||
go func() {
|
||||
defer s.wg.Done()
|
||||
// FIXME contexts
|
||||
nbd.StartServer(ctx, ctx, &s.sessionWaitGroup, logger, serverConfig)
|
||||
}()
|
||||
|
||||
return s, nil
|
||||
}
|
||||
|
||||
// Wait for the server to finish
|
||||
func (s *NBD) Wait() {
|
||||
s.wg.Wait()
|
||||
_ = s.logWr.Close()
|
||||
_ = s.logRd.Close()
|
||||
}
|
||||
139
cmd/serve/nbd/nbd.md
Normal file
139
cmd/serve/nbd/nbd.md
Normal file
@ -0,0 +1,139 @@
|
||||
Run a Network Block Device server using remote:path to store the object.
|
||||
|
||||
You can use a unix socket by setting the url to `unix:/path/to/socket`
|
||||
or just by using an absolute path name.
|
||||
|
||||
`rclone serve nbd` will run on any OS, but the examples for using it
|
||||
are Linux specific. There do exist Windows and macOS NBD clients but
|
||||
these haven't been tested yet.
|
||||
|
||||
To see the packets on the wire use `--dump headers` or `--dump bodies`.
|
||||
|
||||
**NB** this has no authentication. It may in the future allow SSL
|
||||
certificates. If you need access control then you will have to provide
|
||||
it on the network layer, or use unix sockets.
|
||||
|
||||
### remote:path pointing to a file
|
||||
|
||||
If the `remote:path` points to a file then rclone will serve the file
|
||||
directly as a network block device.
|
||||
|
||||
Using this with `--read-only` is recommended. You can use any
|
||||
`--vfs-cache-mode` and only parts of the file that are read will be
|
||||
cached locally if using `--vfs-cache-mode full`.
|
||||
|
||||
If you don't use `--read-only` then `--vfs-cache-mode full` is
|
||||
required and the entire file will be cached locally and won't be
|
||||
uploaded until the client has disconnected (`nbd-client -d`).
|
||||
|
||||
### remote:path pointing to a directory
|
||||
|
||||
If the `remote:path` points to a directory then rclone will treat the
|
||||
directory as a place to store chunks of the exported network block device.
|
||||
|
||||
It will store an `info.json` file in the top level and store the
|
||||
individual chunks in a hierarchical directory scheme with no more than
|
||||
256 chunks or directories in any directory.
|
||||
|
||||
The first time you use this, you should use the `--create` flag
|
||||
indicating how big you want the network block device to appear. Rclone
|
||||
only allocates space you use so you can make this large. For example
|
||||
`--create 1T`. You can also pass the `--chunk-size` flag at this
|
||||
point. If you don't you will get the default of 64k chunks.
|
||||
|
||||
Rclone will then chunk the network block device into `--chunk-size`
|
||||
chunks. Rclone has to download the entire chunk in order to change
|
||||
only part of it and it will cache the chunk on disk so bear that in
|
||||
mind when choosing `--chunk-size`.
|
||||
|
||||
If you wish to change the size of the network block device you can use
|
||||
the `--resize` flag. This won't remove any data, it just changes the
|
||||
size advertised. So if you have made a file system on the block device
|
||||
you will need to resize it too.
|
||||
|
||||
If you are using `--read-only` then you can use any
|
||||
`--vfs-cache-mode`.
|
||||
|
||||
If you are not using `--read-only` then you will need
|
||||
`--vfs-cache-mode writes` or `--vfs-cache-mode full`.
|
||||
|
||||
Note that rclone will be acting as a writeback cache with
|
||||
`--vfs-cache-mode writes` or `--vfs-cache-mode full`. Note that rclone
|
||||
will only write `--transfers` files at once so the cache can get a
|
||||
backlog of uploads. You can reduce the writeback caching slightly
|
||||
setting `--vfs-write-back 0`, however due to the way the kernel works,
|
||||
this will only reduce it slightly.
|
||||
|
||||
If using `--vfs-cache-mode writes` or `--vfs-cache-mode full` it is
|
||||
recommended to set limits on the cache size using some or all of these
|
||||
flags as the VFS can use a lot of disk space very quickly.
|
||||
|
||||
--vfs-cache-max-age duration Max time since last access of objects in the cache (default 1h0m0s)
|
||||
--vfs-cache-max-size SizeSuffix Max total size of objects in the cache (default off)
|
||||
--vfs-cache-min-free-space SizeSuffix Target minimum free space on the disk containing the cache (default off)
|
||||
|
||||
You might also need to set this smaller as the cache will only be
|
||||
examined at this interval.
|
||||
|
||||
--vfs-cache-poll-interval duration Interval to poll the cache for stale objects (default 1m0s)
|
||||
|
||||
### Linux Examples
|
||||
|
||||
Install
|
||||
|
||||
sudo apt install nbd-client
|
||||
|
||||
Start server on localhost:10809 by default.
|
||||
|
||||
rclone -v --vfs-cache-mode full serve ndb remote:path
|
||||
|
||||
List devices
|
||||
|
||||
sudo modprobe nbd
|
||||
sudo nbd-client --list localhost
|
||||
|
||||
Format the partition and mount read write
|
||||
|
||||
sudo nbd-client -g localhost 10809 /dev/nbd0
|
||||
sudo mkfs.ext4 /dev/nbd0
|
||||
sudo mkdir -p /mnt/tmp
|
||||
sudo mount -t ext4 /dev/nbd0 /mnt/tmp
|
||||
|
||||
Mount read only
|
||||
|
||||
rclone -v --vfs-cache-mode full --read-only serve ndb remote:path
|
||||
sudo nbd-client --readonly -g localhost 10809 /dev/nbd0
|
||||
sudo mount -t ext4 -o ro /dev/nbd0 /mnt/tmp
|
||||
|
||||
Disconnect
|
||||
|
||||
sudo umount /mnt/tmp
|
||||
sudo nbd-client -d /dev/nbd0
|
||||
|
||||
### TODO
|
||||
|
||||
Experiment with `-connections` option. This is supported by the code.
|
||||
Does it improve performance?
|
||||
|
||||
-connections num
|
||||
|
||||
-C Use num connections to the server, to allow speeding up request
|
||||
handling, at the cost of higher resource usage on the server.
|
||||
Use of this option requires kernel support available first with
|
||||
Linux 4.9.
|
||||
|
||||
Experiment with `-persist` option - is that a good idea?
|
||||
|
||||
-persist
|
||||
|
||||
-p When this option is specified, nbd-client will immediately try
|
||||
to reconnect an nbd device if the connection ever drops unex‐
|
||||
pectedly due to a lost server or something similar.
|
||||
|
||||
Need to implement Trim and see if Trim is being called.
|
||||
|
||||
Need to delete zero files before upload (do in VFS layer?)
|
||||
|
||||
FIXME need better back pressure from VFS cache to writers.
|
||||
|
||||
FIXME need Sync to actually work!
|
||||
@ -9,6 +9,7 @@ import (
|
||||
"github.com/rclone/rclone/cmd/serve/docker"
|
||||
"github.com/rclone/rclone/cmd/serve/ftp"
|
||||
"github.com/rclone/rclone/cmd/serve/http"
|
||||
"github.com/rclone/rclone/cmd/serve/nbd"
|
||||
"github.com/rclone/rclone/cmd/serve/nfs"
|
||||
"github.com/rclone/rclone/cmd/serve/restic"
|
||||
"github.com/rclone/rclone/cmd/serve/s3"
|
||||
@ -43,6 +44,9 @@ func init() {
|
||||
if s3.Command != nil {
|
||||
Command.AddCommand(s3.Command)
|
||||
}
|
||||
if nbd.Command != nil {
|
||||
Command.AddCommand(nbd.Command)
|
||||
}
|
||||
cmd.Root.AddCommand(Command)
|
||||
}
|
||||
|
||||
|
||||
3
go.mod
3
go.mod
@ -2,6 +2,8 @@ module github.com/rclone/rclone
|
||||
|
||||
go 1.21
|
||||
|
||||
//replace github.com/rclone/gonbdserver => /home/ncw/go/src/github.com/rclone/gonbdserver
|
||||
|
||||
require (
|
||||
bazil.org/fuse v0.0.0-20230120002735-62a210ff1fd5
|
||||
github.com/Azure/azure-sdk-for-go/sdk/azcore v1.13.0
|
||||
@ -53,6 +55,7 @@ require (
|
||||
github.com/prometheus/client_golang v1.19.1
|
||||
github.com/putdotio/go-putio/putio v0.0.0-20200123120452-16d982cac2b8
|
||||
github.com/rclone/gofakes3 v0.0.3-0.20240716093803-d6abc178be56
|
||||
github.com/rclone/gonbdserver v0.0.0-20230928185136-7adb4642e1cb
|
||||
github.com/rfjakob/eme v1.1.2
|
||||
github.com/rivo/uniseg v0.4.7
|
||||
github.com/rogpeppe/go-internal v1.12.0
|
||||
|
||||
2
go.sum
2
go.sum
@ -460,6 +460,8 @@ github.com/rasky/go-xdr v0.0.0-20170124162913-1a41d1a06c93 h1:UVArwN/wkKjMVhh2EQ
|
||||
github.com/rasky/go-xdr v0.0.0-20170124162913-1a41d1a06c93/go.mod h1:Nfe4efndBz4TibWycNE+lqyJZiMX4ycx+QKV8Ta0f/o=
|
||||
github.com/rclone/gofakes3 v0.0.3-0.20240716093803-d6abc178be56 h1:JmCt3EsTnlZrg/PHIyZqvKDRvBCde/rmThAQFliE9bU=
|
||||
github.com/rclone/gofakes3 v0.0.3-0.20240716093803-d6abc178be56/go.mod h1:L0VIBE0mT6ArN/5dfHsJm3UjqCpi5B/cdN+qWDNh7ko=
|
||||
github.com/rclone/gonbdserver v0.0.0-20230928185136-7adb4642e1cb h1:4FyF15nQLPIhLcJDpn2ItwcuO3E/pYQXdPVOt+v3Duk=
|
||||
github.com/rclone/gonbdserver v0.0.0-20230928185136-7adb4642e1cb/go.mod h1:HwROhGq4gA7vncM5mLZjoNbI9CrS52aDuHReB3NMWp4=
|
||||
github.com/relvacode/iso8601 v1.3.0 h1:HguUjsGpIMh/zsTczGN3DVJFxTU/GX+MMmzcKoMO7ko=
|
||||
github.com/relvacode/iso8601 v1.3.0/go.mod h1:FlNp+jz+TXpyRqgmM7tnzHHzBnz776kmAH2h3sZCn0I=
|
||||
github.com/rfjakob/eme v1.1.2 h1:SxziR8msSOElPayZNFfQw4Tjx/Sbaeeh3eRvrHVMUs4=
|
||||
|
||||
Loading…
Reference in New Issue
Block a user