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exporter: support for compression-level

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compression-level option can be set on export to
define the preferred speed vs compression ratio. The
value is a number dependent on the compression algorithm.

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This commit is contained in:
Tonis Tiigi
2022-01-31 21:42:15 -08:00
parent 2633c96bac
commit cab33b1e31
21 changed files with 195 additions and 143 deletions
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15
cache/blobs_linux.go vendored
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@ -8,7 +8,6 @@ import (
"context"
"io"
ctdcompression "github.com/containerd/containerd/archive/compression"
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/mount"
@ -33,20 +32,6 @@ func (sr *immutableRef) tryComputeOverlayBlob(ctx context.Context, lower, upper
return emptyDesc, false, nil
}
if compressorFunc == nil {
switch mediaType {
case ocispecs.MediaTypeImageLayer:
case ocispecs.MediaTypeImageLayerGzip:
compressorFunc = func(dest io.Writer, requiredMediaType string) (io.WriteCloser, error) {
return ctdcompression.CompressStream(dest, ctdcompression.Gzip)
}
case ocispecs.MediaTypeImageLayer + "+zstd":
compressorFunc = zstdWriter
default:
return emptyDesc, false, errors.Errorf("unsupported diff media type: %v", mediaType)
}
}
cw, err := sr.cm.ContentStore.Writer(ctx,
content.WithRef(ref),
content.WithDescriptor(ocispecs.Descriptor{