func TestDownloadError(t *testing.T) {
s, names, _ := dlLoggingSvc([]byte{1, 2, 3})
num := 0
s.Handlers.Send.PushBack(func(r *request.Request) {
num++
if num > 1 {
r.HTTPResponse.StatusCode = 400
r.HTTPResponse.Body = ioutil.NopCloser(bytes.NewReader([]byte{}))
}
})
d := s3manager.NewDownloaderWithClient(s, func(d *s3manager.Downloader) {
d.Concurrency = 1
d.PartSize = 1
})
w := &aws.WriteAtBuffer{}
n, err := d.Download(w, &s3.GetObjectInput{
Bucket: aws.String("bucket"),
Key: aws.String("key"),
})
assert.NotNil(t, err)
assert.Equal(t, int64(1), n)
assert.Equal(t, []string{"GetObject", "GetObject"}, *names)
assert.Equal(t, []byte{1}, w.Bytes())
}
// Get fetches a blob from an S3 compatible blobstore
// Destination will be overwritten if exists
func (client *S3Blobstore) Get(src string, dest io.WriterAt) error {
downloader := s3manager.NewDownloaderWithClient(client.s3Client)
_, err := downloader.Download(dest, &s3.GetObjectInput{
Bucket: aws.String(client.s3cliConfig.BucketName),
Key: aws.String(src),
})
if err != nil {
return err
}
return nil
}
func TestDownloadZero(t *testing.T) {
s, names, ranges := dlLoggingSvc([]byte{})
d := s3manager.NewDownloaderWithClient(s)
w := &aws.WriteAtBuffer{}
n, err := d.Download(w, &s3.GetObjectInput{
Bucket: aws.String("bucket"),
Key: aws.String("key"),
})
assert.Nil(t, err)
assert.Equal(t, int64(0), n)
assert.Equal(t, []string{"GetObject"}, *names)
assert.Equal(t, []string{"bytes=0-5242879"}, *ranges)
}
func TestDownloadSetPartSize(t *testing.T) {
s, names, ranges := dlLoggingSvc([]byte{1, 2, 3})
d := s3manager.NewDownloaderWithClient(s, func(d *s3manager.Downloader) {
d.Concurrency = 1
d.PartSize = 1
})
w := &aws.WriteAtBuffer{}
n, err := d.Download(w, &s3.GetObjectInput{
Bucket: aws.String("bucket"),
Key: aws.String("key"),
})
assert.Nil(t, err)
assert.Equal(t, int64(3), n)
assert.Equal(t, []string{"GetObject", "GetObject", "GetObject"}, *names)
assert.Equal(t, []string{"bytes=0-0", "bytes=1-1", "bytes=2-2"}, *ranges)
assert.Equal(t, []byte{1, 2, 3}, w.Bytes())
}
func TestDownloadPartBodyRetry_FailRetry(t *testing.T) {
s, names := dlLoggingSvcWithErrReader([]testErrReader{
{Buf: []byte("ab"), Len: 3, Err: io.ErrUnexpectedEOF},
})
d := s3manager.NewDownloaderWithClient(s, func(d *s3manager.Downloader) {
d.Concurrency = 1
})
w := &aws.WriteAtBuffer{}
n, err := d.Download(w, &s3.GetObjectInput{
Bucket: aws.String("bucket"),
Key: aws.String("key"),
})
assert.Error(t, err)
assert.Equal(t, int64(2), n)
assert.Equal(t, []string{"GetObject"}, *names)
assert.Equal(t, []byte("ab"), w.Bytes())
}
func TestDownloadContentRangeTotalAny(t *testing.T) {
s, names := dlLoggingSvcContentRangeTotalAny(buf2MB, []int{200, 416})
d := s3manager.NewDownloaderWithClient(s, func(d *s3manager.Downloader) {
d.Concurrency = 1
})
w := &aws.WriteAtBuffer{}
n, err := d.Download(w, &s3.GetObjectInput{
Bucket: aws.String("bucket"),
Key: aws.String("key"),
})
assert.Nil(t, err)
assert.Equal(t, int64(len(buf2MB)), n)
assert.Equal(t, []string{"GetObject", "GetObject"}, *names)
count := 0
for _, b := range w.Bytes() {
count += int(b)
}
assert.Equal(t, 0, count)
}
func TestDownloadOrder(t *testing.T) {
s, names, ranges := dlLoggingSvc(buf12MB)
d := s3manager.NewDownloaderWithClient(s, func(d *s3manager.Downloader) {
d.Concurrency = 1
})
w := &aws.WriteAtBuffer{}
n, err := d.Download(w, &s3.GetObjectInput{
Bucket: aws.String("bucket"),
Key: aws.String("key"),
})
assert.Nil(t, err)
assert.Equal(t, int64(len(buf12MB)), n)
assert.Equal(t, []string{"GetObject", "GetObject", "GetObject"}, *names)
assert.Equal(t, []string{"bytes=0-5242879", "bytes=5242880-10485759", "bytes=10485760-15728639"}, *ranges)
count := 0
for _, b := range w.Bytes() {
count += int(b)
}
assert.Equal(t, 0, count)
}
// Pull imports docker image from tar artifact stored on S3
func (s *StorageS3) Pull(name string) error {
img := imagename.NewFromString(name)
if img.Storage != imagename.StorageS3 {
return fmt.Errorf("Can only pull images with s3 storage specified, got: %s", img)
}
if img.Registry == "" {
return fmt.Errorf("Cannot pull image from S3, missing bucket name, got: %s", img)
}
// TODO: here we use tmp file, but we can stream from S3 directly to Docker
tmpf, err := ioutil.TempFile("", "rocker_image_")
if err != nil {
return err
}
defer os.Remove(tmpf.Name())
var (
// Create a downloader with the s3 client and custom options
downloader = s3manager.NewDownloaderWithClient(s.s3, func(d *s3manager.Downloader) {
d.PartSize = 64 * 1024 * 1024 // 64MB per part
})
imgPath = img.Name + "/" + img.Tag + ".tar"
downloadParams = &s3.GetObjectInput{
Bucket: aws.String(img.Registry),
Key: aws.String(imgPath),
}
)
log.Infof("| Import %s/%s.tar to %s", img.NameWithRegistry(), img.Tag, tmpf.Name())
if err := s.retryer.Outer(func() error {
_, err := downloader.Download(tmpf, downloadParams)
return err
}); err != nil {
return fmt.Errorf("Failed to download object from S3, error: %s", err)
}
fd, err := os.Open(tmpf.Name())
if err != nil {
return err
}
defer fd.Close()
// Read through tar reader to patch repositories file since we might
// mave a different tag property
var (
pipeReader, pipeWriter = io.Pipe()
tr = tar.NewReader(fd)
tw = tar.NewWriter(pipeWriter)
errch = make(chan error, 1)
loadOptions = docker.LoadImageOptions{
InputStream: pipeReader,
}
)
go func() {
errch <- s.client.LoadImage(loadOptions)
}()
// Iterate through the files in the archive.
for {
hdr, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
return fmt.Errorf("Failed to read tar content, error: %s", err)
}
// Skip "repositories" file, we will write our own
if hdr.Name == "repositories" {
// Read repositories file and pass to JSON decoder
r1 := Repositories{}
data, err := ioutil.ReadAll(tr)
if err != nil {
return fmt.Errorf("Failed to read `repositories` file content, error: %s", err)
}
if err := json.Unmarshal(data, &r1); err != nil {
return fmt.Errorf("Failed to parse `repositories` file json, error: %s", err)
}
var imageID string
// Read first key from repositories
for _, tags := range r1 {
for _, id := range tags {
imageID = id
break
}
break
}
// Make a new repositories struct
r2 := Repositories{
img.NameWithRegistry(): {
img.GetTag(): imageID,
},
}
// Write repositories file to the stream
reposBody, err := json.Marshal(r2)
if err != nil {
return fmt.Errorf("Failed to marshal `repositories` file json, error: %s", err)
}
hdr := &tar.Header{
Name: "repositories",
Mode: 0644,
Size: int64(len(reposBody)),
}
if err := tw.WriteHeader(hdr); err != nil {
return fmt.Errorf("Failed to write `repositories` file tar header, error: %s", err)
}
if _, err := tw.Write(reposBody); err != nil {
return fmt.Errorf("Failed to write `repositories` file to tar, error: %s", err)
}
continue
}
// Passthrough other files as is
if err := tw.WriteHeader(hdr); err != nil {
return fmt.Errorf("Failed to passthough tar header, error: %s", err)
}
if _, err := io.Copy(tw, tr); err != nil {
return fmt.Errorf("Failed to passthough tar content, error: %s", err)
}
}
// Finish tar
if err := tw.Close(); err != nil {
return fmt.Errorf("Failed to close tar writer, error: %s", err)
}
// Close pipeWriter
if err := pipeWriter.Close(); err != nil {
return fmt.Errorf("Failed to close tar pipeWriter, error: %s", err)
}
if err := <-errch; err != nil {
errch <- fmt.Errorf("Failed to import image, error: %s", err)
}
return nil
}
func newS3Downloader(svc s3iface.S3API) *_s3downloader {
return &_s3downloader{downloader: s3manager.NewDownloaderWithClient(svc)}
}
