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/version.go

@@ -0,0 +1,42 @@
+/*
+   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/version"
+	"golang.org/x/net/context"
+	runtime "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
+
+	"github.com/containerd/containerd/pkg/constants"
+)
+
+const (
+	containerName = "containerd"
+	// kubeAPIVersion is the api version of kubernetes.
+	// TODO(random-liu): Change this to actual CRI version.
+	kubeAPIVersion = "0.1.0"
+)
+
+// Version returns the runtime name, runtime version and runtime API version.
+func (c *criService) Version(ctx context.Context, r *runtime.VersionRequest) (*runtime.VersionResponse, error) {
+	return &runtime.VersionResponse{
+		Version:           kubeAPIVersion,
+		RuntimeName:       containerName,
+		RuntimeVersion:    version.Version,
+		RuntimeApiVersion: constants.CRIVersion,
+	}, nil
+}