CRI: Retrieve image spec on client

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

pkg/cri/store/image/image.go

@@ -18,12 +18,10 @@ package image
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
 	"sync"
 
 	"github.com/containerd/containerd"
-	"github.com/containerd/containerd/content"
 	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/pkg/cri/util"
 
@@ -132,15 +130,12 @@ func getImage(ctx context.Context, i containerd.Image) (*Image, error) {
 	if err != nil {
 		return nil, fmt.Errorf("get image config descriptor: %w", err)
 	}
+
 	id := desc.Digest.String()
 
-	rb, err := content.ReadBlob(ctx, i.ContentStore(), desc)
+	spec, err := i.Spec(ctx)
 	if err != nil {
-		return nil, fmt.Errorf("read image config from content store: %w", err)
-	}
-	var ociimage imagespec.Image
-	if err := json.Unmarshal(rb, &ociimage); err != nil {
-		return nil, fmt.Errorf("unmarshal image config %s: %w", rb, err)
+		return nil, fmt.Errorf("failed to read get image spec: %w", err)
 	}
 
 	return &Image{
@@ -148,7 +143,7 @@ func getImage(ctx context.Context, i containerd.Image) (*Image, error) {
 		References: []string{i.Name()},
 		ChainID:    chainID.String(),
 		Size:       size,
-		ImageSpec:  ociimage,
+		ImageSpec:  spec,
 	}, nil
 }