From 52d28ec81a9e826ada36069e6709beb4db64b563 Mon Sep 17 00:00:00 2001 From: Sylvain Baubeau Date: Wed, 8 Jul 2015 12:59:29 +0200 Subject: [PATCH] Do not use Swift server side copy for manifests to handle >5G files Signed-off-by: Sylvain Baubeau --- docs/storage/driver/swift/swift.go | 103 +++++++++++++++++++++-------- 1 file changed, 76 insertions(+), 27 deletions(-) diff --git a/docs/storage/driver/swift/swift.go b/docs/storage/driver/swift/swift.go index e3c739828..ce5df88d5 100644 --- a/docs/storage/driver/swift/swift.go +++ b/docs/storage/driver/swift/swift.go @@ -20,7 +20,10 @@ package swift import ( "bytes" + "crypto/rand" + "crypto/sha1" "crypto/tls" + "encoding/hex" "encoding/json" "fmt" "io" @@ -237,6 +240,7 @@ func (d *driver) WriteStream(ctx context.Context, path string, offset int64, rea paddingReader io.Reader currentLength int64 cursor int64 + segmentPath string ) partNumber := 1 @@ -244,7 +248,7 @@ func (d *driver) WriteStream(ctx context.Context, path string, offset int64, rea zeroBuf := make([]byte, d.ChunkSize) getSegment := func() string { - return fmt.Sprintf("%s/%016d", d.swiftSegmentPath(path), partNumber) + return fmt.Sprintf("%s/%016d", segmentPath, partNumber) } max := func(a int64, b int64) int64 { @@ -254,24 +258,36 @@ func (d *driver) WriteStream(ctx context.Context, path string, offset int64, rea return b } - info, _, err := d.Conn.Object(d.Container, d.swiftPath(path)) - if err != nil { - if err == swift.ObjectNotFound { - // Create a object manifest - manifest, err := d.createManifest(path) - if err != nil { + createManifest := true + info, headers, err := d.Conn.Object(d.Container, d.swiftPath(path)) + if err == nil { + manifest, ok := headers["X-Object-Manifest"] + if !ok { + if segmentPath, err = d.swiftSegmentPath(path); err != nil { return 0, err } - manifest.Close() - } else if err == swift.ContainerNotFound { - return 0, storagedriver.PathNotFoundError{Path: path} + if err := d.Conn.ObjectMove(d.Container, d.swiftPath(path), d.Container, getSegment()); err != nil { + return 0, err + } + segments = append(segments, info) } else { + _, segmentPath = parseManifest(manifest) + if segments, err = d.getAllSegments(segmentPath); err != nil { + return 0, err + } + createManifest = false + } + currentLength = info.Bytes + } else if err == swift.ObjectNotFound { + if segmentPath, err = d.swiftSegmentPath(path); err != nil { return 0, err } } else { - // The manifest already exists. Get all the segments - currentLength = info.Bytes - if segments, err = d.getAllSegments(path); err != nil { + return 0, err + } + + if createManifest { + if err := d.createManifest(path, d.Container+"/"+segmentPath); err != nil { return 0, err } } @@ -468,8 +484,18 @@ func (d *driver) List(ctx context.Context, path string) ([]string, error) { // Move moves an object stored at sourcePath to destPath, removing the original // object. func (d *driver) Move(ctx context.Context, sourcePath string, destPath string) error { - err := d.Conn.ObjectMove(d.Container, d.swiftPath(sourcePath), d.Container, d.swiftPath(destPath)) - if err == swift.ContainerNotFound || err == swift.ObjectNotFound { + _, headers, err := d.Conn.Object(d.Container, d.swiftPath(sourcePath)) + if err == nil { + if manifest, ok := headers["X-Object-Manifest"]; ok { + if err = d.createManifest(destPath, manifest); err != nil { + return err + } + err = d.Conn.ObjectDelete(d.Container, d.swiftPath(sourcePath)) + } else { + err = d.Conn.ObjectMove(d.Container, d.swiftPath(sourcePath), d.Container, d.swiftPath(destPath)) + } + } + if err == swift.ObjectNotFound { return storagedriver.PathNotFoundError{Path: sourcePath} } return err @@ -509,9 +535,8 @@ func (d *driver) Delete(ctx context.Context, path string) error { if _, headers, err := d.Conn.Object(d.Container, obj.Name); err == nil { manifest, ok := headers["X-Object-Manifest"] if ok { - components := strings.SplitN(manifest, "/", 2) - segContainer := components[0] - segments, err := d.getAllSegments(components[1]) + segContainer, prefix := parseManifest(manifest) + segments, err := d.getAllSegments(prefix) if err != nil { return err } @@ -566,8 +591,14 @@ func (d *driver) swiftPath(path string) string { return strings.TrimLeft(strings.TrimRight(d.Prefix+"/files"+path, "/"), "/") } -func (d *driver) swiftSegmentPath(path string) string { - return strings.TrimLeft(strings.TrimRight(d.Prefix+"/segments"+path, "/"), "/") +func (d *driver) swiftSegmentPath(path string) (string, error) { + checksum := sha1.New() + random := make([]byte, 32) + if _, err := rand.Read(random); err != nil { + return "", err + } + path = hex.EncodeToString(checksum.Sum(append([]byte(path), random...))) + return strings.TrimLeft(strings.TrimRight(d.Prefix+"/segments/"+path[0:3]+"/"+path[3:], "/"), "/"), nil } func (d *driver) getContentType() string { @@ -575,21 +606,30 @@ func (d *driver) getContentType() string { } func (d *driver) getAllSegments(path string) ([]swift.Object, error) { - segments, err := d.Conn.ObjectsAll(d.Container, &swift.ObjectsOpts{Prefix: d.swiftSegmentPath(path)}) + segments, err := d.Conn.ObjectsAll(d.Container, &swift.ObjectsOpts{Prefix: path}) if err == swift.ContainerNotFound { return nil, storagedriver.PathNotFoundError{Path: path} } return segments, err } -func (d *driver) createManifest(path string) (*swift.ObjectCreateFile, error) { +func (d *driver) createManifest(path string, segments string) error { headers := make(swift.Headers) - headers["X-Object-Manifest"] = d.Container + "/" + d.swiftSegmentPath(path) - file, err := d.Conn.ObjectCreate(d.Container, d.swiftPath(path), false, "", d.getContentType(), headers) - if err == swift.ContainerNotFound { - return nil, storagedriver.PathNotFoundError{Path: path} + headers["X-Object-Manifest"] = segments + manifest, err := d.Conn.ObjectCreate(d.Container, d.swiftPath(path), false, "", d.getContentType(), headers) + if err != nil { + if err == swift.ObjectNotFound { + return storagedriver.PathNotFoundError{Path: path} + } + return err } - return file, err + if err := manifest.Close(); err != nil { + if err == swift.ObjectNotFound { + return storagedriver.PathNotFoundError{Path: path} + } + return err + } + return nil } func detectBulkDelete(authURL string) (bulkDelete bool) { @@ -604,3 +644,12 @@ func detectBulkDelete(authURL string) (bulkDelete bool) { } return } + +func parseManifest(manifest string) (container string, prefix string) { + components := strings.SplitN(manifest, "/", 2) + container = components[0] + if len(components) > 1 { + prefix = components[1] + } + return container, prefix +}