Add initial code framework

cmd/cri-containerd/cri_containerd.go

@@ -0,0 +1,44 @@
+/*
+Copyright 2017 The Kubernetes Authors All rights reserved.
+
+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 main
+
+import (
+	"github.com/golang/glog"
+	"github.com/spf13/pflag"
+
+	"github.com/kubernetes-incubator/cri-containerd/cmd/cri-containerd/options"
+	"github.com/kubernetes-incubator/cri-containerd/pkg/server"
+)
+
+func main() {
+	o := options.NewCRIContainerdOptions()
+	o.AddFlags(pflag.CommandLine)
+	options.InitFlags()
+
+	glog.V(2).Infof("Connect to containerd socket %q with timeout %v", o.ContainerdSocketPath, o.ContainerdConnectionTimeout)
+	conn, err := server.ConnectToContainerd(o.ContainerdSocketPath, o.ContainerdConnectionTimeout)
+	if err != nil {
+		glog.Exitf("Failed to connect containerd socket %q: %v", o.ContainerdSocketPath, err)
+	}
+
+	glog.V(2).Infof("Run cri-containerd grpc server on socket %q", o.CRIContainerdSocketPath)
+	service := server.NewCRIContainerdService(conn)
+	s := server.NewCRIContainerdServer(o.CRIContainerdSocketPath, service, service)
+	if err := s.Run(); err != nil {
+		glog.Exitf("Failed to run cri-containerd grpc server: %v", err)
+	}
+}

cmd/cri-containerd/options/options.go

@@ -0,0 +1,53 @@
+/*
+Copyright 2017 The Kubernetes Authors All rights reserved.
+
+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 options
+
+import (
+	"flag"
+	"time"
+
+	"github.com/spf13/pflag"
+)
+
+// CRIContainerdOptions contains cri-containerd command line options.
+type CRIContainerdOptions struct {
+	// CRIContainerdSocketPath is the path to the socket which cri-containerd serves on.
+	CRIContainerdSocketPath string
+	// ContainerdSocketPath is the path to the containerd socket.
+	ContainerdSocketPath string
+	// ContainerdConnectionTimeout is the connection timeout for containerd client.
+	ContainerdConnectionTimeout time.Duration
+}
+
+func NewCRIContainerdOptions() *CRIContainerdOptions {
+	return &CRIContainerdOptions{}
+}
+
+// AddFlags adds cri-containerd command line options to pflag.
+func (c *CRIContainerdOptions) AddFlags(fs *pflag.FlagSet) {
+	fs.StringVar(&c.CRIContainerdSocketPath, "cri-containerd-socket",
+		"/var/run/cri-containerd.sock", "Path to the socket which cri-containerd serves on.")
+	fs.StringVar(&c.ContainerdSocketPath, "containerd-socket",
+		"/run/containerd/containerd.sock", "Path to the containerd socket.")
+	fs.DurationVar(&c.ContainerdConnectionTimeout, "containerd-connection-timeout",
+		2*time.Minute, "Connection timeout for containerd client.")
+}
+
+func InitFlags() {
+	pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
+	pflag.Parse()
+}

pkg/server/container_attach.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// Attach prepares a streaming endpoint to attach to a running container, and returns the address.
+func (c *criContainerdService) Attach(ctx context.Context, r *runtime.AttachRequest) (*runtime.AttachResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/container_create.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// CreateContainer creates a new container in the given PodSandbox.
+func (c *criContainerdService) CreateContainer(ctx context.Context, r *runtime.CreateContainerRequest) (*runtime.CreateContainerResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/container_exec.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// Exec prepares a streaming endpoint to execute a command in the container, and returns the address.
+func (c *criContainerdService) Exec(ctx context.Context, r *runtime.ExecRequest) (*runtime.ExecResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/container_execsync.go

@@ -0,0 +1,31 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// ExecSync executes a command in the container, and returns the stdout output.
+// If command exits with a non-zero exit code, an error is returned.
+func (c *criContainerdService) ExecSync(ctx context.Context, r *runtime.ExecSyncRequest) (*runtime.ExecSyncResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/container_list.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// ListContainers lists all containers matching the filter.
+func (c *criContainerdService) ListContainers(ctx context.Context, r *runtime.ListContainersRequest) (*runtime.ListContainersResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/container_remove.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// RemoveContainer removes the container.
+func (c *criContainerdService) RemoveContainer(ctx context.Context, r *runtime.RemoveContainerRequest) (*runtime.RemoveContainerResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/container_start.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// StartContainer starts the container.
+func (c *criContainerdService) StartContainer(ctx context.Context, r *runtime.StartContainerRequest) (*runtime.StartContainerResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/container_status.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// ContainerStatus inspects the container and returns the status.
+func (c *criContainerdService) ContainerStatus(ctx context.Context, r *runtime.ContainerStatusRequest) (*runtime.ContainerStatusResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/container_stop.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// StopContainer stops a running container with a grace period (i.e., timeout).
+func (c *criContainerdService) StopContainer(ctx context.Context, r *runtime.StopContainerRequest) (*runtime.StopContainerResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/image_list.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// ListImages lists existing images.
+func (c *criContainerdService) ListImages(ctx context.Context, r *runtime.ListImagesRequest) (*runtime.ListImagesResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/image_pull.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// PullImage pulls an image with authentication config.
+func (c *criContainerdService) PullImage(ctx context.Context, r *runtime.PullImageRequest) (*runtime.PullImageResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/image_remove.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// RemoveImage removes the image.
+func (c *criContainerdService) RemoveImage(ctx context.Context, r *runtime.RemoveImageRequest) (*runtime.RemoveImageResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/image_status.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// ImageStatus returns the status of the image, returns nil if the image doesn't present.
+func (c *criContainerdService) ImageStatus(ctx context.Context, r *runtime.ImageStatusRequest) (*runtime.ImageStatusResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/sandbox_list.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// ListPodSandbox returns a list of Sandbox.
+func (c *criContainerdService) ListPodSandbox(ctx context.Context, r *runtime.ListPodSandboxRequest) (*runtime.ListPodSandboxResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/sandbox_portforward.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// PortForward prepares a streaming endpoint to forward ports from a PodSandbox, and returns the address.
+func (c *criContainerdService) PortForward(ctx context.Context, r *runtime.PortForwardRequest) (*runtime.PortForwardResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/sandbox_remove.go

@@ -0,0 +1,31 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// RemovePodSandbox removes the sandbox. If there are running containers in the
+// sandbox, they should be forcibly removed.
+func (c *criContainerdService) RemovePodSandbox(ctx context.Context, r *runtime.RemovePodSandboxRequest) (*runtime.RemovePodSandboxResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/sandbox_run.go

@@ -0,0 +1,31 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// RunPodSandbox creates and starts a pod-level sandbox. Runtimes should ensure
+// the sandbox is in ready state.
+func (c *criContainerdService) RunPodSandbox(ctx context.Context, r *runtime.RunPodSandboxRequest) (*runtime.RunPodSandboxResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/sandbox_status.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// PodSandboxStatus returns the status of the PodSandbox.
+func (c *criContainerdService) PodSandboxStatus(ctx context.Context, r *runtime.PodSandboxStatusRequest) (*runtime.PodSandboxStatusResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/sandbox_stop.go

@@ -0,0 +1,31 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// StopPodSandbox stops the sandbox. If there are any running containers in the
+// sandbox, they should be forcibly terminated.
+func (c *criContainerdService) StopPodSandbox(ctx context.Context, r *runtime.StopPodSandboxRequest) (*runtime.StopPodSandboxResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/server.go

@@ -0,0 +1,89 @@
+/*
+Copyright 2017 The Kubernetes 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 (
+	"fmt"
+	"net"
+	"os"
+	"syscall"
+	"time"
+
+	"github.com/golang/glog"
+	"google.golang.org/grpc"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+	"k8s.io/kubernetes/pkg/util/interrupt"
+)
+
+// unixProtocol is the network protocol of unix socket.
+const unixProtocol = "unix"
+
+// CRIContainerdServer is the grpc server of cri-containerd.
+type CRIContainerdServer struct {
+	// addr is the address to serve on.
+	addr string
+	// runtimeService is the cri-containerd runtime service.
+	runtimeService runtime.RuntimeServiceServer
+	// imageService is the cri-containerd image service.
+	imageService runtime.ImageServiceServer
+	// server is the grpc server.
+	server *grpc.Server
+}
+
+// NewCRIContainerdServer creates the cri-containerd grpc server.
+func NewCRIContainerdServer(addr string, r runtime.RuntimeServiceServer, i runtime.ImageServiceServer) *CRIContainerdServer {
+	return &CRIContainerdServer{
+		addr:           addr,
+		runtimeService: r,
+		imageService:   i,
+	}
+}
+
+// Run runs the cri-containerd grpc server.
+func (s *CRIContainerdServer) Run() error {
+	glog.V(2).Infof("Start cri-containerd grpc server")
+	// Unlink to cleanup the previous socket file.
+	err := syscall.Unlink(s.addr)
+	if err != nil && !os.IsNotExist(err) {
+		return fmt.Errorf("failed to unlink socket file %q: %v", s.addr, err)
+	}
+	l, err := net.Listen(unixProtocol, s.addr)
+	if err != nil {
+		return fmt.Errorf("failed to listen on %q: %v", s.addr, err)
+	}
+	// Create the grpc server and register runtime and image services.
+	s.server = grpc.NewServer()
+	runtime.RegisterRuntimeServiceServer(s.server, s.runtimeService)
+	runtime.RegisterImageServiceServer(s.server, s.imageService)
+	// Use interrupt handler to make sure the server to be stopped properly.
+	h := interrupt.New(nil, s.server.Stop)
+	return h.Run(func() error { return s.server.Serve(l) })
+}
+
+// ConnectToContainerd returns a grpc client for containerd.
+func ConnectToContainerd(path string, connectionTimeout time.Duration) (*grpc.ClientConn, error) {
+	// get the containerd client
+	dialOpts := []grpc.DialOption{
+		grpc.WithInsecure(),
+		grpc.WithTimeout(connectionTimeout),
+		grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) {
+			return net.DialTimeout(unixProtocol, path, timeout)
+		}),
+	}
+	return grpc.Dial(fmt.Sprintf("%s://%s", unixProtocol, path), dialOpts...)
+}

pkg/server/service.go

@@ -0,0 +1,47 @@
+/*
+Copyright 2017 The Kubernetes 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 (
+	"google.golang.org/grpc"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+
+	_ "github.com/containerd/containerd/api/services/content"
+	_ "github.com/containerd/containerd/api/services/execution"
+	_ "github.com/containerd/containerd/api/services/images"
+	_ "github.com/containerd/containerd/api/services/rootfs"
+	_ "github.com/containerd/containerd/api/types/container"
+	_ "github.com/containerd/containerd/api/types/descriptor"
+	_ "github.com/containerd/containerd/api/types/mount"
+	_ "github.com/opencontainers/image-spec/specs-go"
+	_ "github.com/opencontainers/runtime-spec/specs-go"
+)
+
+// CRIContainerdService is the interface implement CRI remote service server.
+type CRIContainerdService interface {
+	runtime.RuntimeServiceServer
+	runtime.ImageServiceServer
+}
+
+// criContainerdService implements CRIContainerdService.
+type criContainerdService struct{}
+
+func NewCRIContainerdService(conn *grpc.ClientConn) CRIContainerdService {
+	// TODO: Initialize different containerd clients.
+	return &criContainerdService{}
+}

pkg/server/status.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// Status returns the status of the runtime.
+func (c *criContainerdService) Status(ctx context.Context, r *runtime.StatusRequest) (*runtime.StatusResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/update_runtime_config.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// UpdateRuntimeConfig updates the runtime config. Currently only handles podCIDR updates.
+func (c *criContainerdService) UpdateRuntimeConfig(ctx context.Context, r *runtime.UpdateRuntimeConfigRequest) (*runtime.UpdateRuntimeConfigResponse, error) {
+	return nil, errors.New("not implemented")
+}

pkg/server/version.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2017 The Kubernetes 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"
+
+	"k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+// Version returns the runtime name, runtime version and runtime API version.
+func (c *criContainerdService) Version(ctx context.Context, r *runtime.VersionRequest) (*runtime.VersionResponse, error) {
+	return nil, errors.New("not implemented")
+}