Add image load.

Signed-off-by: Lantao Liu <lantaol@google.com>

pkg/server/instrumented_service.go

@@ -20,6 +20,8 @@ import (
 	"github.com/golang/glog"
 	"golang.org/x/net/context"
 	"k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime"
+
+	api "github.com/kubernetes-incubator/cri-containerd/pkg/api/v1"
 )
 
 // instrumentedService wraps service and logs each operation.
@@ -316,3 +318,15 @@ func (in *instrumentedService) ListContainerStats(ctx context.Context, r *runtim
 	}()
 	return in.criContainerdService.ListContainerStats(ctx, r)
 }
+
+func (in *instrumentedService) LoadImage(ctx context.Context, r *api.LoadImageRequest) (res *api.LoadImageResponse, err error) {
+	glog.V(4).Infof("LoadImage from file %q", r.GetFilePath())
+	defer func() {
+		if err != nil {
+			glog.Errorf("LoadImage failed, error: %v", err)
+		} else {
+			glog.V(4).Infof("LoadImage returns images %+v", res.GetImages())
+		}
+	}()
+	return in.criContainerdService.LoadImage(ctx, r)
+}