Move cri server packages under pkg/cri

Organizes the cri related server packages under pkg/cri

Signed-off-by: Derek McGowan <derek@mcg.dev>

pkg/cri/server/image_remove.go

@@ -0,0 +1,65 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package server
+
+import (
+	"github.com/containerd/containerd/errdefs"
+	"github.com/containerd/containerd/images"
+	"github.com/pkg/errors"
+	"golang.org/x/net/context"
+	runtime "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
+
+	"github.com/containerd/containerd/pkg/cri/store"
+)
+
+// RemoveImage removes the image.
+// TODO(random-liu): Update CRI to pass image reference instead of ImageSpec. (See
+// kubernetes/kubernetes#46255)
+// TODO(random-liu): We should change CRI to distinguish image id and image spec.
+// Remove the whole image no matter the it's image id or reference. This is the
+// semantic defined in CRI now.
+func (c *criService) RemoveImage(ctx context.Context, r *runtime.RemoveImageRequest) (*runtime.RemoveImageResponse, error) {
+	image, err := c.localResolve(r.GetImage().GetImage())
+	if err != nil {
+		if err == store.ErrNotExist {
+			// return empty without error when image not found.
+			return &runtime.RemoveImageResponse{}, nil
+		}
+		return nil, errors.Wrapf(err, "can not resolve %q locally", r.GetImage().GetImage())
+	}
+
+	// Remove all image references.
+	for i, ref := range image.References {
+		var opts []images.DeleteOpt
+		if i == len(image.References)-1 {
+			// Delete the last image reference synchronously to trigger garbage collection.
+			// This is best effort. It is possible that the image reference is deleted by
+			// someone else before this point.
+			opts = []images.DeleteOpt{images.SynchronousDelete()}
+		}
+		err = c.client.ImageService().Delete(ctx, ref, opts...)
+		if err == nil || errdefs.IsNotFound(err) {
+			// Update image store to reflect the newest state in containerd.
+			if err := c.imageStore.Update(ctx, ref); err != nil {
+				return nil, errors.Wrapf(err, "failed to update image reference %q for %q", ref, image.ID)
+			}
+			continue
+		}
+		return nil, errors.Wrapf(err, "failed to delete image reference %q for %q", ref, image.ID)
+	}
+	return &runtime.RemoveImageResponse{}, nil
+}