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Remove temporary layer download file on error

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Currently, the temporary file storing downloaded layer data is only
removed after a successful download or a digest verification error. A
transport-level error does not cause it to be removed. This is a
regression from 1.9 that could cause disk usage to grow until the Docker
daemon is restarted.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
This commit is contained in:
Aaron Lehmann 2016-01-25 18:20:18 -08:00
parent ced2d37901
commit 5a363ce60b
1 changed files with 14 additions and 2 deletions
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16
distribution/pull_v2.go
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@ -171,6 +171,10 @@ func (ld *v2LayerDescriptor) Download(ctx context.Context, progressOutput progre
_, err = io.Copy(tmpFile, io.TeeReader(reader, verifier))
if err != nil {
tmpFile.Close()
if err := os.Remove(tmpFile.Name()); err != nil {
logrus.Errorf("Failed to remove temp file: %s", tmpFile.Name())
}
return nil, 0, retryOnError(err)
}
@ -179,8 +183,9 @@ func (ld *v2LayerDescriptor) Download(ctx context.Context, progressOutput progre
if !verifier.Verified() {
err = fmt.Errorf("filesystem layer verification failed for digest %s", ld.digest)
logrus.Error(err)
tmpFile.Close()
if err := os.RemoveAll(tmpFile.Name()); err != nil {
if err := os.Remove(tmpFile.Name()); err != nil {
logrus.Errorf("Failed to remove temp file: %s", tmpFile.Name())
}
@ -191,7 +196,14 @@ func (ld *v2LayerDescriptor) Download(ctx context.Context, progressOutput progre
logrus.Debugf("Downloaded %s to tempfile %s", ld.ID(), tmpFile.Name())
tmpFile.Seek(0, 0)
_, err = tmpFile.Seek(0, os.SEEK_SET)
if err != nil {
tmpFile.Close()
if err := os.Remove(tmpFile.Name()); err != nil {
logrus.Errorf("Failed to remove temp file: %s", tmpFile.Name())
}
return nil, 0, xfer.DoNotRetry{Err: err}
}
return ioutils.NewReadCloserWrapper(tmpFile, tmpFileCloser(tmpFile)), size, nil
}