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Fix file handlers not being closed after calls to ImageStore.GetBlob

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This is to fixes hitting the FD limit when reading blobs from the disk in the graphql API

Signed-off-by: Andrei Aaron <andaaron@cisco.com>
This commit is contained in:
Andrei Aaron
2022-08-19 10:38:59 +00:00
committed by Ramkumar Chinchani
parent 74630ed3a0
commit bd9ad998cd
10 changed files with 83 additions and 54 deletions
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pkg/storage/s3/s3.go
+7 -5
View File
@@ -1253,7 +1253,7 @@ func (is *ObjectStorage) copyBlob(repo string, blobPath string, dstRecord string
// GetBlob returns a stream to read the blob.
// blob selector instead of directly downloading the blob.
func (is *ObjectStorage) GetBlob(repo, digest, mediaType string) (io.Reader, int64, error) {
func (is *ObjectStorage) GetBlob(repo, digest, mediaType string) (io.ReadCloser, int64, error) {
var lockLatency time.Time
dgst, err := godigest.Parse(digest)
@@ -1275,7 +1275,7 @@ func (is *ObjectStorage) GetBlob(repo, digest, mediaType string) (io.Reader, int
return nil, -1, zerr.ErrBlobNotFound
}
blobReader, err := is.store.Reader(context.Background(), blobPath, 0)
blobReadCloser, err := is.store.Reader(context.Background(), blobPath, 0)
if err != nil {
is.log.Error().Err(err).Str("blob", blobPath).Msg("failed to open blob")
@@ -1301,18 +1301,19 @@ func (is *ObjectStorage) GetBlob(repo, digest, mediaType string) (io.Reader, int
return nil, -1, zerr.ErrBlobNotFound
}
blobReader, err := is.store.Reader(context.Background(), dstRecord, 0)
blobReadCloser, err := is.store.Reader(context.Background(), dstRecord, 0)
if err != nil {
is.log.Error().Err(err).Str("blob", dstRecord).Msg("failed to open blob")
return nil, -1, err
}
return blobReader, binfo.Size(), nil
return blobReadCloser, binfo.Size(), nil
}
}
return blobReader, binfo.Size(), nil
// The caller function is responsible for calling Close()
return blobReadCloser, binfo.Size(), nil
}
func (is *ObjectStorage) GetBlobContent(repo, digest string) ([]byte, error) {
@@ -1320,6 +1321,7 @@ func (is *ObjectStorage) GetBlobContent(repo, digest string) ([]byte, error) {
if err != nil {
return []byte{}, err
}
defer blob.Close()
buf := new(bytes.Buffer)
pkg/storage/s3/s3_test.go
+12 -3
View File
@@ -866,9 +866,12 @@ func TestS3Dedupe(t *testing.T) {
So(checkBlobSize1, ShouldBeGreaterThan, 0)
So(err, ShouldBeNil)
_, getBlobSize1, err := imgStore.GetBlob("dedupe1", digest.String(), "application/vnd.oci.image.layer.v1.tar+gzip")
blobReadCloser, getBlobSize1, err := imgStore.GetBlob("dedupe1", digest.String(),
"application/vnd.oci.image.layer.v1.tar+gzip")
So(getBlobSize1, ShouldBeGreaterThan, 0)
So(err, ShouldBeNil)
err = blobReadCloser.Close()
So(err, ShouldBeNil)
cblob, cdigest := test.GetRandomImageConfig()
_, clen, err := imgStore.FullBlobUpload("dedupe1", bytes.NewReader(cblob), cdigest.String())
@@ -928,11 +931,14 @@ func TestS3Dedupe(t *testing.T) {
So(err, ShouldBeNil)
So(checkBlobSize2, ShouldBeGreaterThan, 0)
_, getBlobSize2, err := imgStore.GetBlob("dedupe2", digest.String(), "application/vnd.oci.image.layer.v1.tar+gzip")
blobReadCloser, getBlobSize2, err := imgStore.GetBlob("dedupe2", digest.String(),
"application/vnd.oci.image.layer.v1.tar+gzip")
So(err, ShouldBeNil)
So(getBlobSize2, ShouldBeGreaterThan, 0)
So(checkBlobSize1, ShouldEqual, checkBlobSize2)
So(getBlobSize1, ShouldEqual, getBlobSize2)
err = blobReadCloser.Close()
So(err, ShouldBeNil)
cblob, cdigest = test.GetRandomImageConfig()
_, clen, err = imgStore.FullBlobUpload("dedupe2", bytes.NewReader(cblob), cdigest.String())
@@ -1039,9 +1045,12 @@ func TestS3Dedupe(t *testing.T) {
So(err, ShouldBeNil)
// check that we retrieve the real dedupe2/blob (which is deduped earlier - 0 size) when switching to dedupe false
_, getBlobSize2, err = imgStore.GetBlob("dedupe2", digest.String(), "application/vnd.oci.image.layer.v1.tar+gzip")
blobReadCloser, getBlobSize2, err = imgStore.GetBlob("dedupe2", digest.String(),
"application/vnd.oci.image.layer.v1.tar+gzip")
So(err, ShouldBeNil)
So(getBlobSize1, ShouldEqual, getBlobSize2)
err = blobReadCloser.Close()
So(err, ShouldBeNil)
_, checkBlobSize2, err := imgStore.CheckBlob("dedupe2", digest.String())
So(err, ShouldBeNil)