// TestSimpleBlobRead just creates a simple blob file and ensures that basic
// open, read, seek, read works. More specific edge cases should be covered in
// other tests.
func TestSimpleBlobRead(t *testing.T) {
ctx := context.Background()
imageName := "foo/bar"
driver := inmemory.New()
registry := NewRegistryWithDriver(ctx, driver, memory.NewInMemoryBlobDescriptorCacheProvider(), true)
repository, err := registry.Repository(ctx, imageName)
if err != nil {
t.Fatalf("unexpected error getting repo: %v", err)
}
bs := repository.Blobs(ctx)
randomLayerReader, tarSumStr, err := testutil.CreateRandomTarFile() // TODO(stevvooe): Consider using just a random string.
if err != nil {
t.Fatalf("error creating random data: %v", err)
}
dgst := digest.Digest(tarSumStr)
// Test for existence.
desc, err := bs.Stat(ctx, dgst)
if err != distribution.ErrBlobUnknown {
t.Fatalf("expected not found error when testing for existence: %v", err)
}
rc, err := bs.Open(ctx, dgst)
if err != distribution.ErrBlobUnknown {
t.Fatalf("expected not found error when opening non-existent blob: %v", err)
}
randomLayerSize, err := seekerSize(randomLayerReader)
if err != nil {
t.Fatalf("error getting seeker size for random layer: %v", err)
}
descBefore := distribution.Descriptor{Digest: dgst, MediaType: "application/octet-stream", Size: randomLayerSize}
t.Logf("desc: %v", descBefore)
desc, err = addBlob(ctx, bs, descBefore, randomLayerReader)
if err != nil {
t.Fatalf("error adding blob to blobservice: %v", err)
}
if desc.Size != randomLayerSize {
t.Fatalf("committed blob has incorrect length: %v != %v", desc.Size, randomLayerSize)
}
rc, err = bs.Open(ctx, desc.Digest) // note that we are opening with original digest.
if err != nil {
t.Fatalf("error opening blob with %v: %v", dgst, err)
}
defer rc.Close()
// Now check the sha digest and ensure its the same
h := sha256.New()
nn, err := io.Copy(h, rc)
if err != nil {
t.Fatalf("unexpected error copying to hash: %v", err)
}
if nn != randomLayerSize {
t.Fatalf("stored incorrect number of bytes in blob: %d != %d", nn, randomLayerSize)
}
sha256Digest := digest.NewDigest("sha256", h)
if sha256Digest != desc.Digest {
t.Fatalf("fetched digest does not match: %q != %q", sha256Digest, desc.Digest)
}
// Now seek back the blob, read the whole thing and check against randomLayerData
offset, err := rc.Seek(0, os.SEEK_SET)
if err != nil {
t.Fatalf("error seeking blob: %v", err)
}
if offset != 0 {
t.Fatalf("seek failed: expected 0 offset, got %d", offset)
}
p, err := ioutil.ReadAll(rc)
if err != nil {
t.Fatalf("error reading all of blob: %v", err)
}
if len(p) != int(randomLayerSize) {
t.Fatalf("blob data read has different length: %v != %v", len(p), randomLayerSize)
}
// Reset the randomLayerReader and read back the buffer
_, err = randomLayerReader.Seek(0, os.SEEK_SET)
if err != nil {
t.Fatalf("error resetting layer reader: %v", err)
}
randomLayerData, err := ioutil.ReadAll(randomLayerReader)
if err != nil {
t.Fatalf("random layer read failed: %v", err)
}
if !bytes.Equal(p, randomLayerData) {
t.Fatalf("layer data not equal")
}
}
// TestSimpleBlobUpload covers the blob upload process, exercising common
// error paths that might be seen during an upload.
func TestSimpleBlobUpload(t *testing.T) {
randomDataReader, tarSumStr, err := testutil.CreateRandomTarFile()
if err != nil {
t.Fatalf("error creating random reader: %v", err)
}
dgst := digest.Digest(tarSumStr)
if err != nil {
t.Fatalf("error allocating upload store: %v", err)
}
ctx := context.Background()
imageName := "foo/bar"
driver := inmemory.New()
registry := NewRegistryWithDriver(ctx, driver, memory.NewInMemoryBlobDescriptorCacheProvider(), true)
repository, err := registry.Repository(ctx, imageName)
if err != nil {
t.Fatalf("unexpected error getting repo: %v", err)
}
bs := repository.Blobs(ctx)
h := sha256.New()
rd := io.TeeReader(randomDataReader, h)
blobUpload, err := bs.Create(ctx)
if err != nil {
t.Fatalf("unexpected error starting layer upload: %s", err)
}
// Cancel the upload then restart it
if err := blobUpload.Cancel(ctx); err != nil {
t.Fatalf("unexpected error during upload cancellation: %v", err)
}
// Do a resume, get unknown upload
blobUpload, err = bs.Resume(ctx, blobUpload.ID())
if err != distribution.ErrBlobUploadUnknown {
t.Fatalf("unexpected error resuming upload, should be unknown: %v", err)
}
// Restart!
blobUpload, err = bs.Create(ctx)
if err != nil {
t.Fatalf("unexpected error starting layer upload: %s", err)
}
// Get the size of our random tarfile
randomDataSize, err := seekerSize(randomDataReader)
if err != nil {
t.Fatalf("error getting seeker size of random data: %v", err)
}
nn, err := io.Copy(blobUpload, rd)
if err != nil {
t.Fatalf("unexpected error uploading layer data: %v", err)
}
if nn != randomDataSize {
t.Fatalf("layer data write incomplete")
}
offset, err := blobUpload.Seek(0, os.SEEK_CUR)
if err != nil {
t.Fatalf("unexpected error seeking layer upload: %v", err)
}
if offset != nn {
t.Fatalf("blobUpload not updated with correct offset: %v != %v", offset, nn)
}
blobUpload.Close()
// Do a resume, for good fun
blobUpload, err = bs.Resume(ctx, blobUpload.ID())
if err != nil {
t.Fatalf("unexpected error resuming upload: %v", err)
}
sha256Digest := digest.NewDigest("sha256", h)
desc, err := blobUpload.Commit(ctx, distribution.Descriptor{Digest: dgst})
if err != nil {
t.Fatalf("unexpected error finishing layer upload: %v", err)
}
// 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)
}
// Test for existence.
statDesc, err := bs.Stat(ctx, desc.Digest)
if err != nil {
t.Fatalf("unexpected error checking for existence: %v, %#v", err, bs)
}
if statDesc != desc {
t.Fatalf("descriptors not equal: %v != %v", statDesc, desc)
}
rc, err := bs.Open(ctx, desc.Digest)
if err != nil {
t.Fatalf("unexpected error opening blob for read: %v", err)
}
defer rc.Close()
h.Reset()
nn, err = io.Copy(h, rc)
if err != nil {
t.Fatalf("error reading layer: %v", err)
}
if nn != randomDataSize {
t.Fatalf("incorrect read length")
}
if digest.NewDigest("sha256", h) != sha256Digest {
t.Fatalf("unexpected digest from uploaded layer: %q != %q", digest.NewDigest("sha256", h), sha256Digest)
}
// Delete a blob
err = bs.Delete(ctx, desc.Digest)
if err != nil {
t.Fatalf("Unexpected error deleting blob")
}
d, err := bs.Stat(ctx, desc.Digest)
if err == nil {
t.Fatalf("unexpected non-error stating deleted blob: %s", d)
}
switch err {
case distribution.ErrBlobUnknown:
break
default:
t.Errorf("Unexpected error type stat-ing deleted manifest: %#v", err)
}
_, err = bs.Open(ctx, desc.Digest)
if err == nil {
t.Fatalf("unexpected success opening deleted blob for read")
}
switch err {
case distribution.ErrBlobUnknown:
break
default:
t.Errorf("Unexpected error type getting deleted manifest: %#v", err)
}
// Re-upload the blob
randomBlob, err := ioutil.ReadAll(randomDataReader)
if err != nil {
t.Fatalf("Error reading all of blob %s", err.Error())
}
expectedDigest, err := digest.FromBytes(randomBlob)
if err != nil {
t.Fatalf("Error getting digest from bytes: %s", err)
}
simpleUpload(t, bs, randomBlob, expectedDigest)
d, err = bs.Stat(ctx, expectedDigest)
if err != nil {
t.Errorf("unexpected error stat-ing blob")
}
if d.Digest != expectedDigest {
t.Errorf("Mismatching digest with restored blob")
}
_, err = bs.Open(ctx, expectedDigest)
if err != nil {
t.Errorf("Unexpected error opening blob")
}
// Reuse state to test delete with a delete-disabled registry
registry = NewRegistryWithDriver(ctx, driver, memory.NewInMemoryBlobDescriptorCacheProvider(), false)
repository, err = registry.Repository(ctx, imageName)
if err != nil {
t.Fatalf("unexpected error getting repo: %v", err)
}
bs = repository.Blobs(ctx)
err = bs.Delete(ctx, desc.Digest)
if err == nil {
t.Errorf("Unexpected success deleting while disabled")
}
}