Update imports

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

pkg/server/container_log_reopen.go

@@ -0,0 +1,31 @@
+/*
+Copyright 2018 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 (
+	"errors"
+	"golang.org/x/net/context"
+
+	runtime "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
+)
+
+// ReopenContainerLog asks cri-containerd to reopen the stdout/stderr log file for the container.
+// This is often called after the log file has been rotated.
+// TODO(random-liu): Implement this for kubelet log rotation.
+func (c *criContainerdService) ReopenContainerLog(ctx context.Context, r *runtime.ReopenContainerLogRequest) (*runtime.ReopenContainerLogResponse, error) {
+	return nil, errors.New("not implemented")
+}