Merge pull request #1713 from aibaars/gcs-fix

GCS: FileWriter.Size: return offset + buffer size for Writers that are not closed

AUTHORS

@@ -1,4 +1,5 @@
 Aaron Lehmann <aaron.lehmann@docker.com>
+Aaron Schlesinger <aschlesinger@deis.com>
 Aaron Vinson <avinson.public@gmail.com>
 Adam Enger <adamenger@gmail.com>
 Adrian Mouat <adrian.mouat@gmail.com>
@@ -27,6 +28,7 @@ burnettk <burnettk@gmail.com>
 Carson A <ca@carsonoid.net>
 Chris Dillon <squarism@gmail.com>
 Daisuke Fujita <dtanshi45@gmail.com>
+Daniel Huhn <daniel@danielhuhn.de>
 Darren Shepherd <darren@rancher.com>
 Dave Trombley <dave.trombley@gmail.com>
 Dave Tucker <dt@docker.com>
@@ -59,6 +61,7 @@ Jeff Nickoloff <jeff@allingeek.com>
 Jessie Frazelle <jessie@docker.com>
 Jianqing Wang <tsing@jianqing.org>
 John Starks <jostarks@microsoft.com>
+Jon Johnson <jonjohnson@google.com>
 Jon Poler <jonathan.poler@apcera.com>
 Jonathan Boulle <jonathanboulle@gmail.com>
 Jordan Liggitt <jliggitt@redhat.com>
@@ -103,6 +106,7 @@ Shawn Falkner-Horine <dreadpirateshawn@gmail.com>
 Shreyas Karnik <karnik.shreyas@gmail.com>
 Simon Thulbourn <simon+github@thulbourn.com>
 Spencer Rinehart <anubis@overthemonkey.com>
+Stefan Majewsky <stefan.majewsky@sap.com>
 Stefan Weil <sw@weilnetz.de>
 Stephen J Day <stephen.day@docker.com>
 Sungho Moon <sungho.moon@navercorp.com>
@@ -114,6 +118,7 @@ Thomas Sjögren <konstruktoid@users.noreply.github.com>
 Tianon Gravi <admwiggin@gmail.com>
 Tibor Vass <teabee89@gmail.com>
 Tonis Tiigi <tonistiigi@gmail.com>
+Tony Holdstock-Brown <tony@docker.com>
 Trevor Pounds <trevor.pounds@gmail.com>
 Troels Thomsen <troels@thomsen.io>
 Vincent Batts <vbatts@redhat.com>

manifest/schema1/config_builder.go

@@ -110,7 +110,8 @@ func (mb *configManifestBuilder) Build(ctx context.Context) (m distribution.Mani
 		ContainerConfig struct {
 			Cmd []string
 		} `json:"container_config,omitempty"`
-		ThrowAway bool `json:"throwaway,omitempty"`
+		Author    string `json:"author,omitempty"`
+		ThrowAway bool   `json:"throwaway,omitempty"`
 	}
 
 	fsLayerList := make([]FSLayer, len(img.History))
@@ -145,6 +146,7 @@ func (mb *configManifestBuilder) Build(ctx context.Context) (m distribution.Mani
 			Parent:  parent,
 			Comment: h.Comment,
 			Created: h.Created,
+			Author:  h.Author,
 		}
 		v1Compatibility.ContainerConfig.Cmd = []string{img.History[i].CreatedBy}
 		if h.EmptyLayer {

manifest/schema1/config_builder_test.go

@@ -163,6 +163,7 @@ func TestConfigBuilder(t *testing.T) {
             "empty_layer": true
         },
         {
+            "author": "Alyssa P. Hacker \u003calyspdev@example.com\u003e",
             "created": "2015-11-04T23:06:32.083868454Z",
             "created_by": "/bin/sh -c dd if=/dev/zero of=/file bs=1024 count=1024"
         },
@@ -252,8 +253,8 @@ func TestConfigBuilder(t *testing.T) {
 	}
 
 	expectedV1Compatibility := []string{
-		`{"architecture":"amd64","config":{"AttachStderr":false,"AttachStdin":false,"AttachStdout":false,"Cmd":["/bin/sh","-c","echo hi"],"Domainname":"","Entrypoint":null,"Env":["PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin","derived=true","asdf=true"],"Hostname":"23304fc829f9","Image":"sha256:4ab15c48b859c2920dd5224f92aabcd39a52794c5b3cf088fb3bbb438756c246","Labels":{},"OnBuild":[],"OpenStdin":false,"StdinOnce":false,"Tty":false,"User":"","Volumes":null,"WorkingDir":""},"container":"e91032eb0403a61bfe085ff5a5a48e3659e5a6deae9f4d678daa2ae399d5a001","container_config":{"AttachStderr":false,"AttachStdin":false,"AttachStdout":false,"Cmd":["/bin/sh","-c","#(nop) CMD [\"/bin/sh\" \"-c\" \"echo hi\"]"],"Domainname":"","Entrypoint":null,"Env":["PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin","derived=true","asdf=true"],"Hostname":"23304fc829f9","Image":"sha256:4ab15c48b859c2920dd5224f92aabcd39a52794c5b3cf088fb3bbb438756c246","Labels":{},"OnBuild":[],"OpenStdin":false,"StdinOnce":false,"Tty":false,"User":"","Volumes":null,"WorkingDir":""},"created":"2015-11-04T23:06:32.365666163Z","docker_version":"1.9.0-dev","id":"0850bfdeb7b060b1004a09099846c2f023a3f2ecbf33f56b4774384b00ce0323","os":"linux","parent":"74cf9c92699240efdba1903c2748ef57105d5bedc588084c4e88f3bb1c3ef0b0","throwaway":true}`,
+		`{"architecture":"amd64","config":{"AttachStderr":false,"AttachStdin":false,"AttachStdout":false,"Cmd":["/bin/sh","-c","echo hi"],"Domainname":"","Entrypoint":null,"Env":["PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin","derived=true","asdf=true"],"Hostname":"23304fc829f9","Image":"sha256:4ab15c48b859c2920dd5224f92aabcd39a52794c5b3cf088fb3bbb438756c246","Labels":{},"OnBuild":[],"OpenStdin":false,"StdinOnce":false,"Tty":false,"User":"","Volumes":null,"WorkingDir":""},"container":"e91032eb0403a61bfe085ff5a5a48e3659e5a6deae9f4d678daa2ae399d5a001","container_config":{"AttachStderr":false,"AttachStdin":false,"AttachStdout":false,"Cmd":["/bin/sh","-c","#(nop) CMD [\"/bin/sh\" \"-c\" \"echo hi\"]"],"Domainname":"","Entrypoint":null,"Env":["PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin","derived=true","asdf=true"],"Hostname":"23304fc829f9","Image":"sha256:4ab15c48b859c2920dd5224f92aabcd39a52794c5b3cf088fb3bbb438756c246","Labels":{},"OnBuild":[],"OpenStdin":false,"StdinOnce":false,"Tty":false,"User":"","Volumes":null,"WorkingDir":""},"created":"2015-11-04T23:06:32.365666163Z","docker_version":"1.9.0-dev","id":"69e5c1bfadad697fdb6db59f6326648fa119e0c031a0eda33b8cfadcab54ba7f","os":"linux","parent":"74cf9c92699240efdba1903c2748ef57105d5bedc588084c4e88f3bb1c3ef0b0","throwaway":true}`,
-		`{"id":"74cf9c92699240efdba1903c2748ef57105d5bedc588084c4e88f3bb1c3ef0b0","parent":"178be37afc7c49e951abd75525dbe0871b62ad49402f037164ee6314f754599d","created":"2015-11-04T23:06:32.083868454Z","container_config":{"Cmd":["/bin/sh -c dd if=/dev/zero of=/file bs=1024 count=1024"]}}`,
+		`{"id":"74cf9c92699240efdba1903c2748ef57105d5bedc588084c4e88f3bb1c3ef0b0","parent":"178be37afc7c49e951abd75525dbe0871b62ad49402f037164ee6314f754599d","created":"2015-11-04T23:06:32.083868454Z","container_config":{"Cmd":["/bin/sh -c dd if=/dev/zero of=/file bs=1024 count=1024"]},"author":"Alyssa P. Hacker \u003calyspdev@example.com\u003e"}`,
 		`{"id":"178be37afc7c49e951abd75525dbe0871b62ad49402f037164ee6314f754599d","parent":"b449305a55a283538c4574856a8b701f2a3d5ec08ef8aec47f385f20339a4866","created":"2015-11-04T23:06:31.192097572Z","container_config":{"Cmd":["/bin/sh -c #(nop) ENV asdf=true"]},"throwaway":true}`,
 		`{"id":"b449305a55a283538c4574856a8b701f2a3d5ec08ef8aec47f385f20339a4866","parent":"9e3447ca24cb96d86ebd5960cb34d1299b07e0a0e03801d90b9969a2c187dd6e","created":"2015-11-04T23:06:30.934316144Z","container_config":{"Cmd":["/bin/sh -c #(nop) ENV derived=true"]},"throwaway":true}`,
 		`{"id":"9e3447ca24cb96d86ebd5960cb34d1299b07e0a0e03801d90b9969a2c187dd6e","parent":"3690474eb5b4b26fdfbd89c6e159e8cc376ca76ef48032a30fa6aafd56337880","created":"2015-10-31T22:22:55.613815829Z","container_config":{"Cmd":["/bin/sh -c #(nop) CMD [\"sh\"]"]}}`,

manifest/schema2/builder.go

@@ -55,6 +55,9 @@ func (mb *builder) Build(ctx context.Context) (distribution.Manifest, error) {
 
 	// Add config to the blob store
 	m.Config, err = mb.bs.Put(ctx, MediaTypeConfig, mb.configJSON)
+	// Override MediaType, since Put always replaces the specified media
+	// type with application/octet-stream in the descriptor it returns.
+	m.Config.MediaType = MediaTypeConfig
 	if err != nil {
 		return nil, err
 	}

manifest/schema2/builder_test.go

@@ -32,7 +32,7 @@ func (bs *mockBlobService) Put(ctx context.Context, mediaType string, p []byte)
 	d := distribution.Descriptor{
 		Digest:    digest.FromBytes(p),
 		Size:      int64(len(p)),
-		MediaType: mediaType,
+		MediaType: "application/octet-stream",
 	}
 	bs.descriptors[d.Digest] = d
 	return d, nil

registry/handlers/helpers.go

@@ -46,7 +46,11 @@ func copyFullPayload(responseWriter http.ResponseWriter, r *http.Request, destWr
 			// instead of showing 0 for the HTTP status.
 			responseWriter.WriteHeader(499)
 
-			ctxu.GetLogger(context).Error("client disconnected during " + action)
+			ctxu.GetLoggerWithFields(context, map[interface{}]interface{}{
+				"error":         err,
+				"copied":        copied,
+				"contentLength": r.ContentLength,
+			}, "error", "copied", "contentLength").Error("client disconnected during " + action)
 			return errors.New("client disconnected")
 		default:
 		}

registry/root.go

@@ -1,7 +1,14 @@
 package registry
 
 import (
+	"fmt"
+	"os"
+
+	"github.com/docker/distribution/context"
+	"github.com/docker/distribution/registry/storage"
+	"github.com/docker/distribution/registry/storage/driver/factory"
 	"github.com/docker/distribution/version"
+	"github.com/docker/libtrust"
 	"github.com/spf13/cobra"
 )
 
@@ -10,6 +17,7 @@ var showVersion bool
 func init() {
 	RootCmd.AddCommand(ServeCmd)
 	RootCmd.AddCommand(GCCmd)
+	GCCmd.Flags().BoolVarP(&dryRun, "dry-run", "d", false, "do everything except remove the blobs")
 	RootCmd.Flags().BoolVarP(&showVersion, "version", "v", false, "show the version and exit")
 }
 
@@ -26,3 +34,51 @@ var RootCmd = &cobra.Command{
 		cmd.Usage()
 	},
 }
+
+var dryRun bool
+
+// GCCmd is the cobra command that corresponds to the garbage-collect subcommand
+var GCCmd = &cobra.Command{
+	Use:   "garbage-collect <config>",
+	Short: "`garbage-collect` deletes layers not referenced by any manifests",
+	Long:  "`garbage-collect` deletes layers not referenced by any manifests",
+	Run: func(cmd *cobra.Command, args []string) {
+		config, err := resolveConfiguration(args)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "configuration error: %v\n", err)
+			cmd.Usage()
+			os.Exit(1)
+		}
+
+		driver, err := factory.Create(config.Storage.Type(), config.Storage.Parameters())
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "failed to construct %s driver: %v", config.Storage.Type(), err)
+			os.Exit(1)
+		}
+
+		ctx := context.Background()
+		ctx, err = configureLogging(ctx, config)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "unable to configure logging with config: %s", err)
+			os.Exit(1)
+		}
+
+		k, err := libtrust.GenerateECP256PrivateKey()
+		if err != nil {
+			fmt.Fprint(os.Stderr, err)
+			os.Exit(1)
+		}
+
+		registry, err := storage.NewRegistry(ctx, driver, storage.DisableSchema1Signatures, storage.Schema1SigningKey(k))
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "failed to construct registry: %v", err)
+			os.Exit(1)
+		}
+
+		err = storage.MarkAndSweep(ctx, driver, registry, dryRun)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "failed to garbage collect: %v", err)
+			os.Exit(1)
+		}
+	},
+}

registry/storage/blob_test.go

@@ -16,6 +16,7 @@ import (
 	"github.com/docker/distribution/registry/storage/cache/memory"
 	"github.com/docker/distribution/registry/storage/driver/inmemory"
 	"github.com/docker/distribution/testutil"
+	"path"
 )
 
 // TestWriteSeek tests that the current file size can be
@@ -83,6 +84,15 @@ func TestSimpleBlobUpload(t *testing.T) {
 		t.Fatalf("unexpected error during upload cancellation: %v", err)
 	}
 
+	// get the enclosing directory
+	uploadPath := path.Dir(blobUpload.(*blobWriter).path)
+
+	// ensure state was cleaned up
+	_, err = driver.List(ctx, uploadPath)
+	if err == nil {
+		t.Fatal("files in upload path after cleanup")
+	}
+
 	// Do a resume, get unknown upload
 	blobUpload, err = bs.Resume(ctx, blobUpload.ID())
 	if err != distribution.ErrBlobUploadUnknown {
@@ -128,6 +138,13 @@ func TestSimpleBlobUpload(t *testing.T) {
 		t.Fatalf("unexpected error finishing layer upload: %v", err)
 	}
 
+	// ensure state was cleaned up
+	uploadPath = path.Dir(blobUpload.(*blobWriter).path)
+	_, err = driver.List(ctx, uploadPath)
+	if err == nil {
+		t.Fatal("files in upload path after commit")
+	}
+
 	// After finishing an upload, it should no longer exist.
 	if _, err := bs.Resume(ctx, blobUpload.ID()); err != distribution.ErrBlobUploadUnknown {
 		t.Fatalf("expected layer upload to be unknown, got %v", err)

registry/storage/blobwriter.go

@@ -18,8 +18,8 @@ var (
 	errResumableDigestNotAvailable = errors.New("resumable digest not available")
 )
 
-// layerWriter is used to control the various aspects of resumable
+// blobWriter is used to control the various aspects of resumable
-// layer upload. It implements the LayerUpload interface.
+// blob upload.
 type blobWriter struct {
 	ctx       context.Context
 	blobStore *linkedBlobStore
@@ -34,6 +34,7 @@ type blobWriter struct {
 	path       string
 
 	resumableDigestEnabled bool
+	committed              bool
 }
 
 var _ distribution.BlobWriter = &blobWriter{}
@@ -56,6 +57,8 @@ func (bw *blobWriter) Commit(ctx context.Context, desc distribution.Descriptor)
 		return distribution.Descriptor{}, err
 	}
 
+	bw.Close()
+
 	canonical, err := bw.validateBlob(ctx, desc)
 	if err != nil {
 		return distribution.Descriptor{}, err
@@ -78,6 +81,7 @@ func (bw *blobWriter) Commit(ctx context.Context, desc distribution.Descriptor)
 		return distribution.Descriptor{}, err
 	}
 
+	bw.committed = true
 	return canonical, nil
 }
 
@@ -89,11 +93,14 @@ func (bw *blobWriter) Cancel(ctx context.Context) error {
 		return err
 	}
 
+	if err := bw.Close(); err != nil {
+		context.GetLogger(ctx).Errorf("error closing blobwriter: %s", err)
+	}
+
 	if err := bw.removeResources(ctx); err != nil {
 		return err
 	}
 
-	bw.Close()
 	return nil
 }
 
@@ -130,6 +137,10 @@ func (bw *blobWriter) ReadFrom(r io.Reader) (n int64, err error) {
 }
 
 func (bw *blobWriter) Close() error {
+	if bw.committed {
+		return errors.New("blobwriter close after commit")
+	}
+
 	if err := bw.storeHashState(bw.blobStore.ctx); err != nil {
 		return err
 	}

registry/storage/driver/gcs/gcs.go

@@ -493,6 +493,9 @@ func (w *writer) Write(p []byte) (int, error) {
 
 // Size returns the number of bytes written to this FileWriter.
 func (w *writer) Size() int64 {
+	if !w.closed {
+		return w.offset + int64(w.buffSize)
+	}
 	return w.size
 }
 

registry/storage/driver/s3-aws/s3.go

@@ -18,6 +18,7 @@ import (
 	"io/ioutil"
 	"net/http"
 	"reflect"
+	"sort"
 	"strconv"
 	"strings"
 	"time"
@@ -80,6 +81,7 @@ func init() {
 		"ap-northeast-1",
 		"ap-northeast-2",
 		"sa-east-1",
+		"cn-north-1",
 	} {
 		validRegions[region] = struct{}{}
 	}
@@ -136,14 +138,21 @@ func FromParameters(parameters map[string]interface{}) (*Driver, error) {
 		secretKey = ""
 	}
 
+	regionEndpoint := parameters["regionendpoint"]
+	if regionEndpoint == nil {
+		regionEndpoint = ""
+	}
+
 	regionName, ok := parameters["region"]
 	if regionName == nil || fmt.Sprint(regionName) == "" {
 		return nil, fmt.Errorf("No region parameter provided")
 	}
 	region := fmt.Sprint(regionName)
-	_, ok = validRegions[region]
+	// Don't check the region value if a custom endpoint is provided.
-	if !ok {
+	if regionEndpoint == "" {
-		return nil, fmt.Errorf("Invalid region provided: %v", region)
+		if _, ok = validRegions[region]; !ok {
+			return nil, fmt.Errorf("Invalid region provided: %v", region)
+		}
 	}
 
 	bucket := parameters["bucket"]
@@ -151,11 +160,6 @@ func FromParameters(parameters map[string]interface{}) (*Driver, error) {
 		return nil, fmt.Errorf("No bucket parameter provided")
 	}
 
-	regionEndpoint := parameters["regionendpoint"]
-	if regionEndpoint == nil {
-		regionEndpoint = ""
-	}
-
 	encryptBool := false
 	encrypt := parameters["encrypt"]
 	switch encrypt := encrypt.(type) {
@@ -716,6 +720,12 @@ func (d *driver) newWriter(key, uploadID string, parts []*s3.Part) storagedriver
 	}
 }
 
+type completedParts []*s3.CompletedPart
+
+func (a completedParts) Len() int           { return len(a) }
+func (a completedParts) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+func (a completedParts) Less(i, j int) bool { return *a[i].PartNumber < *a[j].PartNumber }
+
 func (w *writer) Write(p []byte) (int, error) {
 	if w.closed {
 		return 0, fmt.Errorf("already closed")
@@ -728,19 +738,22 @@ func (w *writer) Write(p []byte) (int, error) {
 	// If the last written part is smaller than minChunkSize, we need to make a
 	// new multipart upload :sadface:
 	if len(w.parts) > 0 && int(*w.parts[len(w.parts)-1].Size) < minChunkSize {
-		var completedParts []*s3.CompletedPart
+		var completedUploadedParts completedParts
 		for _, part := range w.parts {
-			completedParts = append(completedParts, &s3.CompletedPart{
+			completedUploadedParts = append(completedUploadedParts, &s3.CompletedPart{
 				ETag:       part.ETag,
 				PartNumber: part.PartNumber,
 			})
 		}
+
+		sort.Sort(completedUploadedParts)
+
 		_, err := w.driver.S3.CompleteMultipartUpload(&s3.CompleteMultipartUploadInput{
 			Bucket:   aws.String(w.driver.Bucket),
 			Key:      aws.String(w.key),
 			UploadId: aws.String(w.uploadID),
 			MultipartUpload: &s3.CompletedMultipartUpload{
-				Parts: completedParts,
+				Parts: completedUploadedParts,
 			},
 		})
 		if err != nil {
@@ -880,19 +893,23 @@ func (w *writer) Commit() error {
 		return err
 	}
 	w.committed = true
-	var completedParts []*s3.CompletedPart
+
+	var completedUploadedParts completedParts
 	for _, part := range w.parts {
-		completedParts = append(completedParts, &s3.CompletedPart{
+		completedUploadedParts = append(completedUploadedParts, &s3.CompletedPart{
 			ETag:       part.ETag,
 			PartNumber: part.PartNumber,
 		})
 	}
+
+	sort.Sort(completedUploadedParts)
+
 	_, err = w.driver.S3.CompleteMultipartUpload(&s3.CompleteMultipartUploadInput{
 		Bucket:   aws.String(w.driver.Bucket),
 		Key:      aws.String(w.key),
 		UploadId: aws.String(w.uploadID),
 		MultipartUpload: &s3.CompletedMultipartUpload{
-			Parts: completedParts,
+			Parts: completedUploadedParts,
 		},
 	})
 	if err != nil {

registry/storage/driver/swift/swift.go

@@ -698,6 +698,9 @@ func (w *writer) Close() error {
 		if err := w.driver.createManifest(w.path, w.driver.Container+"/"+w.segmentsPath); err != nil {
 			return err
 		}
+		if err := w.waitForSegmentsToShowUp(); err != nil {
+			return err
+		}
 	}
 	w.closed = true
 
@@ -732,10 +735,14 @@ func (w *writer) Commit() error {
 	}
 
 	w.committed = true
+	return w.waitForSegmentsToShowUp()
+}
 
+func (w *writer) waitForSegmentsToShowUp() error {
 	var err error
 	waitingTime := readAfterWriteWait
 	endTime := time.Now().Add(readAfterWriteTimeout)
+
 	for {
 		var info swift.Object
 		if info, _, err = w.driver.Conn.Object(w.driver.Container, w.driver.swiftPath(w.path)); err == nil {

registry/storage/garbagecollect.go

@@ -1,8 +1,7 @@
-package registry
+package storage
 
 import (
 	"fmt"
-	"os"
 
 	"github.com/docker/distribution"
 	"github.com/docker/distribution/context"
@@ -10,21 +9,15 @@ import (
 	"github.com/docker/distribution/manifest/schema1"
 	"github.com/docker/distribution/manifest/schema2"
 	"github.com/docker/distribution/reference"
-	"github.com/docker/distribution/registry/storage"
 	"github.com/docker/distribution/registry/storage/driver"
-	"github.com/docker/distribution/registry/storage/driver/factory"
-	"github.com/docker/libtrust"
-	"github.com/spf13/cobra"
 )
 
 func emit(format string, a ...interface{}) {
-	if dryRun {
+	fmt.Printf(format+"\n", a...)
-		fmt.Printf(format+"\n", a...)
-	}
 }
 
-func markAndSweep(ctx context.Context, storageDriver driver.StorageDriver, registry distribution.Namespace) error {
+// MarkAndSweep performs a mark and sweep of registry data
-
+func MarkAndSweep(ctx context.Context, storageDriver driver.StorageDriver, registry distribution.Namespace, dryRun bool) error {
 	repositoryEnumerator, ok := registry.(distribution.RepositoryEnumerator)
 	if !ok {
 		return fmt.Errorf("unable to convert Namespace to RepositoryEnumerator")
@@ -33,7 +26,9 @@ func markAndSweep(ctx context.Context, storageDriver driver.StorageDriver, regis
 	// mark
 	markSet := make(map[digest.Digest]struct{})
 	err := repositoryEnumerator.Enumerate(ctx, func(repoName string) error {
-		emit(repoName)
+		if dryRun {
+			emit(repoName)
+		}
 
 		var err error
 		named, err := reference.ParseNamed(repoName)
@@ -57,7 +52,9 @@ func markAndSweep(ctx context.Context, storageDriver driver.StorageDriver, regis
 
 		err = manifestEnumerator.Enumerate(ctx, func(dgst digest.Digest) error {
 			// Mark the manifest's blob
-			emit("%s: marking manifest %s ", repoName, dgst)
+			if dryRun {
+				emit("%s: marking manifest %s ", repoName, dgst)
+			}
 			markSet[dgst] = struct{}{}
 
 			manifest, err := manifestService.Get(ctx, dgst)
@@ -68,7 +65,9 @@ func markAndSweep(ctx context.Context, storageDriver driver.StorageDriver, regis
 			descriptors := manifest.References()
 			for _, descriptor := range descriptors {
 				markSet[descriptor.Digest] = struct{}{}
-				emit("%s: marking blob %s", repoName, descriptor.Digest)
+				if dryRun {
+					emit("%s: marking blob %s", repoName, descriptor.Digest)
+				}
 			}
 
 			switch manifest.(type) {
@@ -82,13 +81,17 @@ func markAndSweep(ctx context.Context, storageDriver driver.StorageDriver, regis
 					return fmt.Errorf("failed to get signatures for signed manifest: %v", err)
 				}
 				for _, signatureDigest := range signatures {
-					emit("%s: marking signature %s", repoName, signatureDigest)
+					if dryRun {
+						emit("%s: marking signature %s", repoName, signatureDigest)
+					}
 					markSet[signatureDigest] = struct{}{}
 				}
 				break
 			case *schema2.DeserializedManifest:
 				config := manifest.(*schema2.DeserializedManifest).Config
-				emit("%s: marking configuration %s", repoName, config.Digest)
+				if dryRun {
+					emit("%s: marking configuration %s", repoName, config.Digest)
+				}
 				markSet[config.Digest] = struct{}{}
 				break
 			}
@@ -96,6 +99,17 @@ func markAndSweep(ctx context.Context, storageDriver driver.StorageDriver, regis
 			return nil
 		})
 
+		if err != nil {
+			// In certain situations such as unfinished uploads, deleting all
+			// tags in S3 or removing the _manifests folder manually, this
+			// error may be of type PathNotFound.
+			//
+			// In these cases we can continue marking other manifests safely.
+			if _, ok := err.(driver.PathNotFoundError); ok {
+				return nil
+			}
+		}
+
 		return err
 	})
 
@@ -116,13 +130,14 @@ func markAndSweep(ctx context.Context, storageDriver driver.StorageDriver, regis
 	if err != nil {
 		return fmt.Errorf("error enumerating blobs: %v", err)
 	}
-
+	if dryRun {
-	emit("\n%d blobs marked, %d blobs eligible for deletion", len(markSet), len(deleteSet))
+		emit("\n%d blobs marked, %d blobs eligible for deletion", len(markSet), len(deleteSet))
+	}
 	// Construct vacuum
-	vacuum := storage.NewVacuum(ctx, storageDriver)
+	vacuum := NewVacuum(ctx, storageDriver)
 	for dgst := range deleteSet {
-		emit("blob eligible for deletion: %s", dgst)
 		if dryRun {
+			emit("blob eligible for deletion: %s", dgst)
 			continue
 		}
 		err = vacuum.RemoveBlob(string(dgst))
@@ -133,55 +148,3 @@ func markAndSweep(ctx context.Context, storageDriver driver.StorageDriver, regis
 
 	return err
 }
-
-func init() {
-	GCCmd.Flags().BoolVarP(&dryRun, "dry-run", "d", false, "do everything expect remove the blobs")
-}
-
-var dryRun bool
-
-// GCCmd is the cobra command that corresponds to the garbage-collect subcommand
-var GCCmd = &cobra.Command{
-	Use:   "garbage-collect <config>",
-	Short: "`garbage-collect` deletes layers not referenced by any manifests",
-	Long:  "`garbage-collect` deletes layers not referenced by any manifests",
-	Run: func(cmd *cobra.Command, args []string) {
-		config, err := resolveConfiguration(args)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "configuration error: %v\n", err)
-			cmd.Usage()
-			os.Exit(1)
-		}
-
-		driver, err := factory.Create(config.Storage.Type(), config.Storage.Parameters())
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "failed to construct %s driver: %v", config.Storage.Type(), err)
-			os.Exit(1)
-		}
-
-		ctx := context.Background()
-		ctx, err = configureLogging(ctx, config)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "unable to configure logging with config: %s", err)
-			os.Exit(1)
-		}
-
-		k, err := libtrust.GenerateECP256PrivateKey()
-		if err != nil {
-			fmt.Fprint(os.Stderr, err)
-			os.Exit(1)
-		}
-
-		registry, err := storage.NewRegistry(ctx, driver, storage.DisableSchema1Signatures, storage.Schema1SigningKey(k))
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "failed to construct registry: %v", err)
-			os.Exit(1)
-		}
-
-		err = markAndSweep(ctx, driver, registry)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "failed to garbage collect: %v", err)
-			os.Exit(1)
-		}
-	},
-}

registry/storage/garbagecollect_test.go

@@ -1,14 +1,14 @@
-package registry
+package storage
 
 import (
 	"io"
+	"path"
 	"testing"
 
 	"github.com/docker/distribution"
 	"github.com/docker/distribution/context"
 	"github.com/docker/distribution/digest"
 	"github.com/docker/distribution/reference"
-	"github.com/docker/distribution/registry/storage"
 	"github.com/docker/distribution/registry/storage/driver"
 	"github.com/docker/distribution/registry/storage/driver/inmemory"
 	"github.com/docker/distribution/testutil"
@@ -22,7 +22,7 @@ type image struct {
 
 func createRegistry(t *testing.T, driver driver.StorageDriver) distribution.Namespace {
 	ctx := context.Background()
-	registry, err := storage.NewRegistry(ctx, driver, storage.EnableDelete)
+	registry, err := NewRegistry(ctx, driver, EnableDelete)
 	if err != nil {
 		t.Fatalf("Failed to construct namespace")
 	}
@@ -161,7 +161,7 @@ func TestNoDeletionNoEffect(t *testing.T) {
 	}
 
 	// Run GC
-	err = markAndSweep(context.Background(), inmemoryDriver, registry)
+	err = MarkAndSweep(context.Background(), inmemoryDriver, registry, false)
 	if err != nil {
 		t.Fatalf("Failed mark and sweep: %v", err)
 	}
@@ -177,6 +177,37 @@ func TestNoDeletionNoEffect(t *testing.T) {
 	}
 }
 
+func TestGCWithMissingManifests(t *testing.T) {
+	ctx := context.Background()
+	d := inmemory.New()
+
+	registry := createRegistry(t, d)
+	repo := makeRepository(t, registry, "testrepo")
+	uploadRandomSchema1Image(t, repo)
+
+	// Simulate a missing _manifests directory
+	revPath, err := pathFor(manifestRevisionsPathSpec{"testrepo"})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_manifestsPath := path.Dir(revPath)
+	err = d.Delete(ctx, _manifestsPath)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	err = MarkAndSweep(context.Background(), d, registry, false)
+	if err != nil {
+		t.Fatalf("Failed mark and sweep: %v", err)
+	}
+
+	blobs := allBlobs(t, registry)
+	if len(blobs) > 0 {
+		t.Errorf("unexpected blobs after gc")
+	}
+}
+
 func TestDeletionHasEffect(t *testing.T) {
 	ctx := context.Background()
 	inmemoryDriver := inmemory.New()
@@ -193,7 +224,7 @@ func TestDeletionHasEffect(t *testing.T) {
 	manifests.Delete(ctx, image3.manifestDigest)
 
 	// Run GC
-	err = markAndSweep(context.Background(), inmemoryDriver, registry)
+	err = MarkAndSweep(context.Background(), inmemoryDriver, registry, false)
 	if err != nil {
 		t.Fatalf("Failed mark and sweep: %v", err)
 	}
@@ -327,7 +358,7 @@ func TestOrphanBlobDeleted(t *testing.T) {
 	uploadRandomSchema2Image(t, repo)
 
 	// Run GC
-	err = markAndSweep(context.Background(), inmemoryDriver, registry)
+	err = MarkAndSweep(context.Background(), inmemoryDriver, registry, false)
 	if err != nil {
 		t.Fatalf("Failed mark and sweep: %v", err)
 	}