Refactor sandbox controller interface

Update the sandbox controller interface to use local types rather than
using the API types.

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

api/next.pb.txt

@@ -1039,11 +1039,11 @@ file {
   message_type {
     name: "SandboxStatusResponse"
     field {
-      name: "id"
+      name: "sandbox_id"
       number: 1
       label: LABEL_OPTIONAL
       type: TYPE_STRING
-      json_name: "id"
+      json_name: "sandboxId"
     }
     field {
       name: "pid"
@@ -5176,11 +5176,11 @@ file {
   message_type {
     name: "ControllerStatusResponse"
     field {
-      name: "id"
+      name: "sandbox_id"
       number: 1
       label: LABEL_OPTIONAL
       type: TYPE_STRING
-      json_name: "id"
+      json_name: "sandboxId"
     }
     field {
       name: "pid"

api/runtime/sandbox/v1/sandbox.pb.go

@@ -699,7 +699,7 @@ type SandboxStatusResponse struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	ID        string                 `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	SandboxID string                 `protobuf:"bytes,1,opt,name=sandbox_id,json=sandboxId,proto3" json:"sandbox_id,omitempty"`
 	Pid       uint32                 `protobuf:"varint,2,opt,name=pid,proto3" json:"pid,omitempty"`
 	State     string                 `protobuf:"bytes,3,opt,name=state,proto3" json:"state,omitempty"`
 	Info      map[string]string      `protobuf:"bytes,4,rep,name=info,proto3" json:"info,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
@@ -740,9 +740,9 @@ func (*SandboxStatusResponse) Descriptor() ([]byte, []int) {
 	return file_github_com_containerd_containerd_api_runtime_sandbox_v1_sandbox_proto_rawDescGZIP(), []int{13}
 }
 
-func (x *SandboxStatusResponse) GetID() string {
+func (x *SandboxStatusResponse) GetSandboxID() string {
 	if x != nil {
-		return x.ID
+		return x.SandboxID
 	}
 	return ""
 }
@@ -1051,105 +1051,105 @@ var file_github_com_containerd_containerd_api_runtime_sandbox_v1_sandbox_proto_r
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 }
 
 var (

api/runtime/sandbox/v1/sandbox.proto

@@ -113,7 +113,7 @@ message SandboxStatusRequest {
 }
 
 message SandboxStatusResponse {
-	string id = 1;
+	string sandbox_id = 1;
 	uint32 pid = 2;
 	string state = 3;
 	map<string, string> info = 4;

api/services/sandbox/v1/sandbox.pb.go

@@ -1092,7 +1092,7 @@ type ControllerStatusResponse struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	ID        string                 `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	SandboxID string                 `protobuf:"bytes,1,opt,name=sandbox_id,json=sandboxId,proto3" json:"sandbox_id,omitempty"`
 	Pid       uint32                 `protobuf:"varint,2,opt,name=pid,proto3" json:"pid,omitempty"`
 	State     string                 `protobuf:"bytes,3,opt,name=state,proto3" json:"state,omitempty"`
 	Info      map[string]string      `protobuf:"bytes,4,rep,name=info,proto3" json:"info,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
@@ -1133,9 +1133,9 @@ func (*ControllerStatusResponse) Descriptor() ([]byte, []int) {
 	return file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_rawDescGZIP(), []int{21}
 }
 
-func (x *ControllerStatusResponse) GetID() string {
+func (x *ControllerStatusResponse) GetSandboxID() string {
 	if x != nil {
-		return x.ID
+		return x.SandboxID
 	}
 	return ""
 }
@@ -1398,133 +1398,134 @@ var file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_
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+	0x6f, 0x6c, 0x6c, 0x65, 0x72, 0x57, 0x61, 0x69, 0x74, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74,
+	0x1a, 0x36, 0x2e, 0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x64, 0x2e, 0x73, 0x65,
+	0x72, 0x76, 0x69, 0x63, 0x65, 0x73, 0x2e, 0x73, 0x61, 0x6e, 0x64, 0x62, 0x6f, 0x78, 0x2e, 0x76,
+	0x31, 0x2e, 0x43, 0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c, 0x6c, 0x65, 0x72, 0x57, 0x61, 0x69, 0x74,
+	0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x7b, 0x0a, 0x06, 0x53, 0x74, 0x61, 0x74,
+	0x75, 0x73, 0x12, 0x37, 0x2e, 0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x64, 0x2e,
+	0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x73, 0x2e, 0x73, 0x61, 0x6e, 0x64, 0x62, 0x6f, 0x78,
+	0x2e, 0x76, 0x31, 0x2e, 0x43, 0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c, 0x6c, 0x65, 0x72, 0x53, 0x74,
+	0x61, 0x74, 0x75, 0x73, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x38, 0x2e, 0x63, 0x6f,
+	0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x64, 0x2e, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65,
+	0x73, 0x2e, 0x73, 0x61, 0x6e, 0x64, 0x62, 0x6f, 0x78, 0x2e, 0x76, 0x31, 0x2e, 0x43, 0x6f, 0x6e,
+	0x74, 0x72, 0x6f, 0x6c, 0x6c, 0x65, 0x72, 0x53, 0x74, 0x61, 0x74, 0x75, 0x73, 0x52, 0x65, 0x73,
+	0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x81, 0x01, 0x0a, 0x08, 0x53, 0x68, 0x75, 0x74, 0x64, 0x6f,
+	0x77, 0x6e, 0x12, 0x39, 0x2e, 0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x64, 0x2e,
+	0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x73, 0x2e, 0x73, 0x61, 0x6e, 0x64, 0x62, 0x6f, 0x78,
+	0x2e, 0x76, 0x31, 0x2e, 0x43, 0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c, 0x6c, 0x65, 0x72, 0x53, 0x68,
+	0x75, 0x74, 0x64, 0x6f, 0x77, 0x6e, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x3a, 0x2e,
+	0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x64, 0x2e, 0x73, 0x65, 0x72, 0x76, 0x69,
+	0x63, 0x65, 0x73, 0x2e, 0x73, 0x61, 0x6e, 0x64, 0x62, 0x6f, 0x78, 0x2e, 0x76, 0x31, 0x2e, 0x43,
+	0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c, 0x6c, 0x65, 0x72, 0x53, 0x68, 0x75, 0x74, 0x64, 0x6f, 0x77,
+	0x6e, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x42, 0x5a, 0x40, 0x67, 0x69, 0x74,
+	0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65,
+	0x72, 0x64, 0x2f, 0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x64, 0x2f, 0x61, 0x70,
+	0x69, 0x2f, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x73, 0x2f, 0x73, 0x61, 0x6e, 0x64, 0x62,
+	0x6f, 0x78, 0x2f, 0x76, 0x31, 0x3b, 0x73, 0x61, 0x6e, 0x64, 0x62, 0x6f, 0x78, 0x62, 0x06, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

api/services/sandbox/v1/sandbox.proto

@@ -146,7 +146,7 @@ message ControllerStatusRequest {
 }
 
 message ControllerStatusResponse {
-	string id = 1;
+	string sandbox_id = 1;
 	uint32 pid = 2;
 	string state = 3;
 	map<string, string> info = 4;

pkg/cri/sbserver/container_create.go

@@ -67,14 +67,14 @@ func (c *criService) CreateContainer(ctx context.Context, r *runtime.CreateConta
 		return nil, fmt.Errorf("failed to get sandbox controller: %w", err)
 	}
 
-	statusResponse, err := controller.Status(ctx, sandbox.ID, false)
+	cstatus, err := controller.Status(ctx, sandbox.ID, false)
 	if err != nil {
 		return nil, fmt.Errorf("failed to get controller status: %w", err)
 	}
 
 	var (
-		sandboxID  = statusResponse.GetID()
+		sandboxID  = cstatus.SandboxID
-		sandboxPid = statusResponse.GetPid()
+		sandboxPid = cstatus.Pid
 	)
 
 	// Generate unique id and name for the container and reserve the name.

pkg/cri/sbserver/podsandbox/controller.go

@@ -26,7 +26,6 @@ import (
 
 	"github.com/containerd/containerd"
 	eventtypes "github.com/containerd/containerd/api/events"
-	api "github.com/containerd/containerd/api/services/sandbox/v1"
 	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/oci"
 	criconfig "github.com/containerd/containerd/pkg/cri/config"
@@ -94,17 +93,17 @@ func (c *Controller) Platform(_ctx context.Context, _sandboxID string) (platform
 	return platforms.DefaultSpec(), nil
 }
 
-func (c *Controller) Wait(ctx context.Context, sandboxID string) (*api.ControllerWaitResponse, error) {
+func (c *Controller) Wait(ctx context.Context, sandboxID string) (sandbox.ExitStatus, error) {
 	status := c.store.Get(sandboxID)
 	if status == nil {
-		return nil, fmt.Errorf("failed to get exit channel. %q", sandboxID)
+		return sandbox.ExitStatus{}, fmt.Errorf("failed to get exit channel. %q", sandboxID)
 	}
 
 	exitStatus, exitedAt, err := c.waitSandboxExit(ctx, sandboxID, status.Waiter)
 
-	return &api.ControllerWaitResponse{
+	return sandbox.ExitStatus{
 		ExitStatus: exitStatus,
-		ExitedAt:   protobuf.ToTimestamp(exitedAt),
+		ExitedAt:   exitedAt,
 	}, err
 }
 

pkg/cri/sbserver/podsandbox/controller_test.go

@@ -25,7 +25,6 @@ import (
 	"github.com/containerd/containerd/pkg/cri/store/label"
 	sandboxstore "github.com/containerd/containerd/pkg/cri/store/sandbox"
 	ostesting "github.com/containerd/containerd/pkg/os/testing"
-	"github.com/containerd/containerd/protobuf"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -83,6 +82,6 @@ func Test_Status(t *testing.T) {
 		t.Fatal(err)
 	}
 	assert.Equal(t, s.Pid, pid)
-	assert.Equal(t, s.ExitedAt, protobuf.ToTimestamp(exitedAt))
+	assert.Equal(t, s.ExitedAt, exitedAt)
 	assert.Equal(t, s.State, sandboxstore.StateReady.String())
 }

pkg/cri/sbserver/podsandbox/sandbox_delete.go

@@ -23,30 +23,29 @@ import (
 	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
 
 	"github.com/containerd/containerd"
-	api "github.com/containerd/containerd/api/services/sandbox/v1"
 	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/log"
 )
 
-func (c *Controller) Shutdown(ctx context.Context, sandboxID string) (*api.ControllerShutdownResponse, error) {
+func (c *Controller) Shutdown(ctx context.Context, sandboxID string) error {
 	sandbox, err := c.sandboxStore.Get(sandboxID)
 	if err != nil {
 		if !errdefs.IsNotFound(err) {
-			return nil, fmt.Errorf("an error occurred when try to find sandbox %q: %w", sandboxID, err)
+			return fmt.Errorf("an error occurred when try to find sandbox %q: %w", sandboxID, err)
 		}
 		// Do not return error if the id doesn't exist.
 		log.G(ctx).Tracef("Sandbox controller Delete called for sandbox %q that does not exist", sandboxID)
-		return &api.ControllerShutdownResponse{}, nil
+		return nil
 	}
 
 	// Cleanup the sandbox root directories.
 	sandboxRootDir := c.getSandboxRootDir(sandboxID)
 	if err := ensureRemoveAll(ctx, sandboxRootDir); err != nil {
-		return nil, fmt.Errorf("failed to remove sandbox root directory %q: %w", sandboxRootDir, err)
+		return fmt.Errorf("failed to remove sandbox root directory %q: %w", sandboxRootDir, err)
 	}
 	volatileSandboxRootDir := c.getVolatileSandboxRootDir(sandboxID)
 	if err := ensureRemoveAll(ctx, volatileSandboxRootDir); err != nil {
-		return nil, fmt.Errorf("failed to remove volatile sandbox root directory %q: %w",
+		return fmt.Errorf("failed to remove volatile sandbox root directory %q: %w",
 			volatileSandboxRootDir, err)
 	}
 
@@ -54,7 +53,7 @@ func (c *Controller) Shutdown(ctx context.Context, sandboxID string) (*api.Contr
 	if sandbox.Container != nil {
 		if err := sandbox.Container.Delete(ctx, containerd.WithSnapshotCleanup); err != nil {
 			if !errdefs.IsNotFound(err) {
-				return nil, fmt.Errorf("failed to delete sandbox container %q: %w", sandboxID, err)
+				return fmt.Errorf("failed to delete sandbox container %q: %w", sandboxID, err)
 			}
 			log.G(ctx).Tracef("Sandbox controller Delete called for sandbox container %q that does not exist", sandboxID)
 		}
@@ -65,5 +64,5 @@ func (c *Controller) Shutdown(ctx context.Context, sandboxID string) (*api.Contr
 	// Send CONTAINER_DELETED event with ContainerId equal to SandboxId.
 	c.cri.GenerateAndSendContainerEvent(ctx, sandboxID, sandboxID, runtime.ContainerEventType_CONTAINER_DELETED_EVENT)
 
-	return &api.ControllerShutdownResponse{}, nil
+	return nil
 }

pkg/cri/sbserver/podsandbox/sandbox_run.go

@@ -29,7 +29,6 @@ import (
 	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
 
 	"github.com/containerd/containerd"
-	api "github.com/containerd/containerd/api/services/sandbox/v1"
 	containerdio "github.com/containerd/containerd/cio"
 	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/log"
@@ -38,7 +37,7 @@ import (
 	customopts "github.com/containerd/containerd/pkg/cri/opts"
 	sandboxstore "github.com/containerd/containerd/pkg/cri/store/sandbox"
 	ctrdutil "github.com/containerd/containerd/pkg/cri/util"
-	"github.com/containerd/containerd/protobuf"
+	"github.com/containerd/containerd/sandbox"
 	"github.com/containerd/containerd/snapshots"
 )
 
@@ -51,23 +50,22 @@ func init() {
 // down the created resources.  If an error occurs while tearing down resources, a zero-valued response is returned
 // alongside the error.  If the teardown was successful, a nil response is returned with the error.
 // TODO(samuelkarp) Determine whether this error indication is reasonable to retain once controller.Delete is implemented.
-func (c *Controller) Start(ctx context.Context, id string) (resp *api.ControllerStartResponse, retErr error) {
+func (c *Controller) Start(ctx context.Context, id string) (cin sandbox.ControllerInstance, retErr error) {
 	var cleanupErr error
 	defer func() {
 		if retErr != nil && cleanupErr != nil {
 			log.G(ctx).WithField("id", id).WithError(cleanupErr).Errorf("failed to fully teardown sandbox resources after earlier error: %s", retErr)
-			resp = &api.ControllerStartResponse{}
 		}
 	}()
 
 	sandboxInfo, err := c.client.SandboxStore().Get(ctx, id)
 	if err != nil {
-		return nil, fmt.Errorf("unable to find sandbox with id %q: %w", id, err)
+		return cin, fmt.Errorf("unable to find sandbox with id %q: %w", id, err)
 	}
 
 	var metadata sandboxstore.Metadata
 	if err := sandboxInfo.GetExtension(MetadataKey, &metadata); err != nil {
-		return nil, fmt.Errorf("failed to get sandbox %q metadata: %w", id, err)
+		return cin, fmt.Errorf("failed to get sandbox %q metadata: %w", id, err)
 	}
 
 	var (
@@ -78,17 +76,17 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 	// Ensure sandbox container image snapshot.
 	image, err := c.cri.EnsureImageExists(ctx, c.config.SandboxImage, config)
 	if err != nil {
-		return nil, fmt.Errorf("failed to get sandbox image %q: %w", c.config.SandboxImage, err)
+		return cin, fmt.Errorf("failed to get sandbox image %q: %w", c.config.SandboxImage, err)
 	}
 
 	containerdImage, err := c.toContainerdImage(ctx, *image)
 	if err != nil {
-		return nil, fmt.Errorf("failed to get image from containerd %q: %w", image.ID, err)
+		return cin, fmt.Errorf("failed to get image from containerd %q: %w", image.ID, err)
 	}
 
 	ociRuntime, err := c.getSandboxRuntime(config, metadata.RuntimeHandler)
 	if err != nil {
-		return nil, fmt.Errorf("failed to get sandbox runtime: %w", err)
+		return cin, fmt.Errorf("failed to get sandbox runtime: %w", err)
 	}
 	log.G(ctx).WithField("podsandboxid", id).Debugf("use OCI runtime %+v", ociRuntime)
 
@@ -100,7 +98,7 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 	// it safely.
 	spec, err := c.sandboxContainerSpec(id, config, &image.ImageSpec.Config, metadata.NetNSPath, ociRuntime.PodAnnotations)
 	if err != nil {
-		return nil, fmt.Errorf("failed to generate sandbox container spec: %w", err)
+		return cin, fmt.Errorf("failed to generate sandbox container spec: %w", err)
 	}
 	log.G(ctx).WithField("podsandboxid", id).Debugf("sandbox container spec: %#+v", spew.NewFormatter(spec))
 
@@ -114,7 +112,7 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 
 	// handle any KVM based runtime
 	if err := modifyProcessLabel(ociRuntime.Type, spec); err != nil {
-		return nil, err
+		return cin, err
 	}
 
 	if config.GetLinux().GetSecurityContext().GetPrivileged() {
@@ -126,7 +124,7 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 	// Generate spec options that will be applied to the spec later.
 	specOpts, err := c.sandboxContainerSpecOpts(config, &image.ImageSpec.Config)
 	if err != nil {
-		return nil, fmt.Errorf("failed to generate sandbox container spec options: %w", err)
+		return cin, fmt.Errorf("failed to generate sandbox container spec options: %w", err)
 	}
 
 	sandboxLabels := buildLabels(config.Labels, image.ImageSpec.Config.Labels, containerKindSandbox)
@@ -143,7 +141,7 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 
 	container, err := c.client.NewContainer(ctx, id, opts...)
 	if err != nil {
-		return nil, fmt.Errorf("failed to create containerd container: %w", err)
+		return cin, fmt.Errorf("failed to create containerd container: %w", err)
 	}
 	defer func() {
 		if retErr != nil && cleanupErr == nil {
@@ -163,7 +161,7 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 	// Create sandbox container root directories.
 	sandboxRootDir := c.getSandboxRootDir(id)
 	if err := c.os.MkdirAll(sandboxRootDir, 0755); err != nil {
-		return nil, fmt.Errorf("failed to create sandbox root directory %q: %w",
+		return cin, fmt.Errorf("failed to create sandbox root directory %q: %w",
 			sandboxRootDir, err)
 	}
 	defer func() {
@@ -178,7 +176,7 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 
 	volatileSandboxRootDir := c.getVolatileSandboxRootDir(id)
 	if err := c.os.MkdirAll(volatileSandboxRootDir, 0755); err != nil {
-		return nil, fmt.Errorf("failed to create volatile sandbox root directory %q: %w",
+		return cin, fmt.Errorf("failed to create volatile sandbox root directory %q: %w",
 			volatileSandboxRootDir, err)
 	}
 	defer func() {
@@ -193,7 +191,7 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 
 	// Setup files required for the sandbox.
 	if err = c.setupSandboxFiles(id, config); err != nil {
-		return nil, fmt.Errorf("failed to setup sandbox files: %w", err)
+		return cin, fmt.Errorf("failed to setup sandbox files: %w", err)
 	}
 	defer func() {
 		if retErr != nil && cleanupErr == nil {
@@ -207,7 +205,7 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 	// Update sandbox created timestamp.
 	info, err := container.Info(ctx)
 	if err != nil {
-		return nil, fmt.Errorf("failed to get sandbox container info: %w", err)
+		return cin, fmt.Errorf("failed to get sandbox container info: %w", err)
 	}
 
 	// Create sandbox task in containerd.
@@ -221,7 +219,7 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 	// We don't need stdio for sandbox container.
 	task, err := container.NewTask(ctx, containerdio.NullIO, taskOpts...)
 	if err != nil {
-		return nil, fmt.Errorf("failed to create containerd task: %w", err)
+		return cin, fmt.Errorf("failed to create containerd task: %w", err)
 	}
 	defer func() {
 		if retErr != nil && cleanupErr == nil {
@@ -238,13 +236,13 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 	// wait is a long running background request, no timeout needed.
 	exitCh, err := task.Wait(ctrdutil.NamespacedContext())
 	if err != nil {
-		return nil, fmt.Errorf("failed to wait for sandbox container task: %w", err)
+		return cin, fmt.Errorf("failed to wait for sandbox container task: %w", err)
 	}
 	c.store.Save(id, exitCh)
 
 	nric, err := nri.New()
 	if err != nil {
-		return nil, fmt.Errorf("unable to create nri client: %w", err)
+		return cin, fmt.Errorf("unable to create nri client: %w", err)
 	}
 	if nric != nil {
 		nriSB := &nri.Sandbox{
@@ -252,25 +250,23 @@ func (c *Controller) Start(ctx context.Context, id string) (resp *api.Controller
 			Labels: config.Labels,
 		}
 		if _, err := nric.InvokeWithSandbox(ctx, task, v1.Create, nriSB); err != nil {
-			return nil, fmt.Errorf("nri invoke: %w", err)
+			return cin, fmt.Errorf("nri invoke: %w", err)
 		}
 	}
 
 	if err := task.Start(ctx); err != nil {
-		return nil, fmt.Errorf("failed to start sandbox container task %q: %w", id, err)
+		return cin, fmt.Errorf("failed to start sandbox container task %q: %w", id, err)
 	}
 
 	// Send CONTAINER_STARTED event with ContainerId equal to SandboxId.
 	c.cri.GenerateAndSendContainerEvent(ctx, id, id, runtime.ContainerEventType_CONTAINER_STARTED_EVENT)
 
-	resp = &api.ControllerStartResponse{
+	cin.SandboxID = id
-		SandboxID: id,
+	cin.Pid = task.Pid()
-		Pid:       task.Pid(),
+	cin.CreatedAt = info.CreatedAt
-		CreatedAt: protobuf.ToTimestamp(info.CreatedAt),
+	cin.Labels = labels
-		Labels:    labels,
-	}
 
-	return resp, nil
+	return
 }
 
 func (c *Controller) Create(ctx context.Context, _id string) error {

pkg/cri/sbserver/podsandbox/sandbox_status.go

@@ -22,11 +22,10 @@ import (
 	"fmt"
 
 	"github.com/containerd/containerd"
-	api "github.com/containerd/containerd/api/services/sandbox/v1"
 	"github.com/containerd/containerd/containers"
 	"github.com/containerd/containerd/errdefs"
 	sandboxstore "github.com/containerd/containerd/pkg/cri/store/sandbox"
-	"github.com/containerd/containerd/protobuf"
+	"github.com/containerd/containerd/sandbox"
 	"github.com/containerd/go-cni"
 	"github.com/containerd/typeurl"
 	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
@@ -55,36 +54,36 @@ type SandboxInfo struct {
 	Metadata    *sandboxstore.Metadata `json:"sandboxMetadata"`
 }
 
-func (c *Controller) Status(ctx context.Context, sandboxID string, verbose bool) (*api.ControllerStatusResponse, error) {
+func (c *Controller) Status(ctx context.Context, sandboxID string, verbose bool) (sandbox.ControllerStatus, error) {
-	sandbox, err := c.sandboxStore.Get(sandboxID)
+	sb, err := c.sandboxStore.Get(sandboxID)
 	if err != nil {
-		return nil, fmt.Errorf("an error occurred while trying to find sandbox %q: %w",
+		return sandbox.ControllerStatus{}, fmt.Errorf("an error occurred while trying to find sandbox %q: %w",
 			sandboxID, err)
 	}
 
-	status := sandbox.Status.Get()
+	status := sb.Status.Get()
-	resp := &api.ControllerStatusResponse{
+	cstatus := sandbox.ControllerStatus{
-		ID:        sandboxID,
+		SandboxID: sandboxID,
 		Pid:       status.Pid,
 		State:     status.State.String(),
-		CreatedAt: protobuf.ToTimestamp(status.CreatedAt),
+		CreatedAt: status.CreatedAt,
 		Extra:     nil,
 	}
 
 	if !status.ExitedAt.IsZero() {
-		resp.ExitedAt = protobuf.ToTimestamp(status.ExitedAt)
+		cstatus.ExitedAt = status.ExitedAt
 	}
 
 	if verbose {
-		info, err := toCRISandboxInfo(ctx, sandbox)
+		info, err := toCRISandboxInfo(ctx, sb)
 		if err != nil {
-			return nil, err
+			return sandbox.ControllerStatus{}, err
 		}
 
-		resp.Info = info
+		cstatus.Info = info
 	}
 
-	return resp, nil
+	return cstatus, nil
 }
 
 // toCRISandboxInfo converts internal container object information to CRI sandbox status response info map.

pkg/cri/sbserver/podsandbox/sandbox_stop.go

@@ -25,22 +25,21 @@ import (
 	"github.com/sirupsen/logrus"
 
 	eventtypes "github.com/containerd/containerd/api/events"
-	api "github.com/containerd/containerd/api/services/sandbox/v1"
 	"github.com/containerd/containerd/errdefs"
 	sandboxstore "github.com/containerd/containerd/pkg/cri/store/sandbox"
 	ctrdutil "github.com/containerd/containerd/pkg/cri/util"
 	"github.com/containerd/containerd/protobuf"
 )
 
-func (c *Controller) Stop(ctx context.Context, sandboxID string) (*api.ControllerStopResponse, error) {
+func (c *Controller) Stop(ctx context.Context, sandboxID string) error {
 	sandbox, err := c.sandboxStore.Get(sandboxID)
 	if err != nil {
-		return nil, fmt.Errorf("an error occurred when try to find sandbox %q: %w",
+		return fmt.Errorf("an error occurred when try to find sandbox %q: %w",
 			sandboxID, err)
 	}
 
 	if err := c.cleanupSandboxFiles(sandboxID, sandbox.Config); err != nil {
-		return nil, fmt.Errorf("failed to cleanup sandbox files: %w", err)
+		return fmt.Errorf("failed to cleanup sandbox files: %w", err)
 	}
 
 	// TODO: The Controller maintains its own Status instead of CRI's sandboxStore.
@@ -48,10 +47,10 @@ func (c *Controller) Stop(ctx context.Context, sandboxID string) (*api.Controlle
 	state := sandbox.Status.Get().State
 	if (state == sandboxstore.StateReady || state == sandboxstore.StateUnknown) && sandbox.Container != nil {
 		if err := c.stopSandboxContainer(ctx, sandbox); err != nil {
-			return nil, fmt.Errorf("failed to stop sandbox container %q in %q state: %w", sandboxID, state, err)
+			return fmt.Errorf("failed to stop sandbox container %q in %q state: %w", sandboxID, state, err)
 		}
 	}
-	return &api.ControllerStopResponse{}, nil
+	return nil
 }
 
 // stopSandboxContainer kills the sandbox container.

pkg/cri/sbserver/sandbox_remove.go

@@ -86,7 +86,7 @@ func (c *criService) RemovePodSandbox(ctx context.Context, r *runtime.RemovePodS
 		return nil, fmt.Errorf("failed to get sandbox controller: %w", err)
 	}
 
-	if _, err := controller.Shutdown(ctx, id); err != nil && !errdefs.IsNotFound(err) {
+	if err := controller.Shutdown(ctx, id); err != nil && !errdefs.IsNotFound(err) {
 		return nil, fmt.Errorf("failed to delete sandbox %q: %w", id, err)
 	}
 

pkg/cri/sbserver/sandbox_run.go

@@ -41,7 +41,6 @@ import (
 	"github.com/containerd/containerd/pkg/cri/util"
 	ctrdutil "github.com/containerd/containerd/pkg/cri/util"
 	"github.com/containerd/containerd/pkg/netns"
-	"github.com/containerd/containerd/protobuf"
 	sb "github.com/containerd/containerd/sandbox"
 )
 
@@ -230,10 +229,10 @@ func (c *criService) RunPodSandbox(ctx context.Context, r *runtime.RunPodSandbox
 		return nil, fmt.Errorf("failed to create sandbox %q: %w", id, err)
 	}
 
-	resp, err := controller.Start(ctx, id)
+	ctrl, err := controller.Start(ctx, id)
 	if err != nil {
 		sandbox.Container, _ = c.client.LoadContainer(ctx, id)
-		if resp != nil && resp.SandboxID == "" && resp.Pid == 0 && resp.CreatedAt == nil && len(resp.Labels) == 0 {
+		if ctrl.SandboxID == "" && ctrl.Pid == 0 && ctrl.CreatedAt.IsZero() && len(ctrl.Labels) == 0 {
 			// if resp is a non-nil zero-value, an error occurred during cleanup
 			cleanupErr = fmt.Errorf("failed to cleanup sandbox")
 		}
@@ -249,7 +248,7 @@ func (c *criService) RunPodSandbox(ctx context.Context, r *runtime.RunPodSandbox
 		sandbox.Container = container
 	}
 
-	labels := resp.GetLabels()
+	labels := ctrl.Labels
 	if labels == nil {
 		labels = map[string]string{}
 	}
@@ -258,9 +257,9 @@ func (c *criService) RunPodSandbox(ctx context.Context, r *runtime.RunPodSandbox
 
 	if err := sandbox.Status.Update(func(status sandboxstore.Status) (sandboxstore.Status, error) {
 		// Set the pod sandbox as ready after successfully start sandbox container.
-		status.Pid = resp.Pid
+		status.Pid = ctrl.Pid
 		status.State = sandboxstore.StateReady
-		status.CreatedAt = protobuf.FromTimestamp(resp.CreatedAt)
+		status.CreatedAt = ctrl.CreatedAt
 		return status, nil
 	}); err != nil {
 		return nil, fmt.Errorf("failed to update sandbox status: %w", err)
@@ -284,7 +283,7 @@ func (c *criService) RunPodSandbox(ctx context.Context, r *runtime.RunPodSandbox
 			return
 		}
 
-		exitCh <- *containerd.NewExitStatus(resp.ExitStatus, protobuf.FromTimestamp(resp.ExitedAt), nil)
+		exitCh <- *containerd.NewExitStatus(resp.ExitStatus, resp.ExitedAt, nil)
 	}()
 
 	// start the monitor after adding sandbox into the store, this ensures
@@ -292,7 +291,7 @@ func (c *criService) RunPodSandbox(ctx context.Context, r *runtime.RunPodSandbox
 	//
 	// TaskOOM from containerd may come before sandbox is added to store,
 	// but we don't care about sandbox TaskOOM right now, so it is fine.
-	c.eventMonitor.startSandboxExitMonitor(context.Background(), id, resp.GetPid(), exitCh)
+	c.eventMonitor.startSandboxExitMonitor(context.Background(), id, ctrl.Pid, exitCh)
 
 	sandboxRuntimeCreateTimer.WithValues(labels["oci_runtime_type"]).UpdateSince(runtimeStart)
 

pkg/cri/sbserver/sandbox_status.go

@@ -42,12 +42,12 @@ func (c *criService) PodSandboxStatus(ctx context.Context, r *runtime.PodSandbox
 		return nil, fmt.Errorf("failed to get sandbox controller: %w", err)
 	}
 
-	statusResponse, err := controller.Status(ctx, sandbox.ID, r.GetVerbose())
+	cstatus, err := controller.Status(ctx, sandbox.ID, r.GetVerbose())
 	if err != nil {
 		return nil, fmt.Errorf("failed to query controller status: %w", err)
 	}
 
-	status := toCRISandboxStatus(sandbox.Metadata, statusResponse.State, statusResponse.GetCreatedAt().AsTime(), ip, additionalIPs)
+	status := toCRISandboxStatus(sandbox.Metadata, cstatus.State, cstatus.CreatedAt, ip, additionalIPs)
 	if status.GetCreatedAt() == 0 {
 		// CRI doesn't allow CreatedAt == 0.
 		sandboxInfo, err := c.client.SandboxStore().Get(ctx, sandbox.ID)
@@ -59,7 +59,7 @@ func (c *criService) PodSandboxStatus(ctx context.Context, r *runtime.PodSandbox
 
 	return &runtime.PodSandboxStatusResponse{
 		Status: status,
-		Info:   statusResponse.GetInfo(),
+		Info:   cstatus.Info,
 	}, nil
 }
 

pkg/cri/sbserver/sandbox_stop.go

@@ -73,7 +73,7 @@ func (c *criService) stopPodSandbox(ctx context.Context, sandbox sandboxstore.Sa
 			return fmt.Errorf("failed to get sandbox controller: %w", err)
 		}
 
-		if _, err := controller.Stop(ctx, id); err != nil {
+		if err := controller.Stop(ctx, id); err != nil {
 			return fmt.Errorf("failed to stop sandbox %q: %w", id, err)
 		}
 	}

sandbox.go

@@ -24,7 +24,6 @@ import (
 
 	"github.com/containerd/containerd/containers"
 	"github.com/containerd/containerd/oci"
-	"github.com/containerd/containerd/protobuf"
 	"github.com/containerd/containerd/protobuf/types"
 	api "github.com/containerd/containerd/sandbox"
 	"github.com/containerd/typeurl"
@@ -96,7 +95,7 @@ func (s *sandboxClient) Wait(ctx context.Context) (<-chan ExitStatus, error) {
 	go func() {
 		defer close(c)
 
-		resp, err := s.client.SandboxController().Wait(ctx, s.ID())
+		exitStatus, err := s.client.SandboxController().Wait(ctx, s.ID())
 		if err != nil {
 			c <- ExitStatus{
 				code: UnknownExitStatus,
@@ -106,8 +105,8 @@ func (s *sandboxClient) Wait(ctx context.Context) (<-chan ExitStatus, error) {
 		}
 
 		c <- ExitStatus{
-			code:     resp.ExitStatus,
+			code:     exitStatus.ExitStatus,
-			exitedAt: protobuf.FromTimestamp(resp.ExitedAt),
+			exitedAt: exitStatus.ExitedAt,
 		}
 	}()
 
@@ -115,14 +114,11 @@ func (s *sandboxClient) Wait(ctx context.Context) (<-chan ExitStatus, error) {
 }
 
 func (s *sandboxClient) Stop(ctx context.Context) error {
-	if _, err := s.client.SandboxController().Stop(ctx, s.ID()); err != nil {
+	return s.client.SandboxController().Stop(ctx, s.ID())
-		return err
-	}
-	return nil
 }
 
 func (s *sandboxClient) Shutdown(ctx context.Context) error {
-	if _, err := s.client.SandboxController().Shutdown(ctx, s.ID()); err != nil {
+	if err := s.client.SandboxController().Shutdown(ctx, s.ID()); err != nil {
 		return fmt.Errorf("failed to shutdown sandbox: %w", err)
 	}
 

sandbox/controller.go

@@ -18,9 +18,10 @@ package sandbox
 
 import (
 	"context"
+	"time"
 
-	"github.com/containerd/containerd/api/services/sandbox/v1"
 	"github.com/containerd/containerd/platforms"
+	"github.com/containerd/typeurl"
 )
 
 // Controller is an interface to manage sandboxes at runtime.
@@ -30,17 +31,39 @@ type Controller interface {
 	// Create is used to initialize sandbox environment.
 	Create(ctx context.Context, sandboxID string) error
 	// Start will start previously created sandbox.
-	Start(ctx context.Context, sandboxID string) (*sandbox.ControllerStartResponse, error)
+	Start(ctx context.Context, sandboxID string) (ControllerInstance, error)
 	// Platform returns target sandbox OS that will be used by Controller.
 	// containerd will rely on this to generate proper OCI spec.
 	Platform(_ctx context.Context, _sandboxID string) (platforms.Platform, error)
 	// Stop will stop sandbox instance
-	Stop(ctx context.Context, sandboxID string) (*sandbox.ControllerStopResponse, error)
+	Stop(ctx context.Context, sandboxID string) error
 	// Wait blocks until sandbox process exits.
-	Wait(ctx context.Context, sandboxID string) (*sandbox.ControllerWaitResponse, error)
+	Wait(ctx context.Context, sandboxID string) (ExitStatus, error)
 	// Status will query sandbox process status. It is heavier than Ping call and must be used whenever you need to
 	// gather metadata about current sandbox state (status, uptime, resource use, etc).
-	Status(ctx context.Context, sandboxID string, verbose bool) (*sandbox.ControllerStatusResponse, error)
+	Status(ctx context.Context, sandboxID string, verbose bool) (ControllerStatus, error)
 	// Shutdown deletes and cleans all tasks and sandbox instance.
-	Shutdown(ctx context.Context, sandboxID string) (*sandbox.ControllerShutdownResponse, error)
+	Shutdown(ctx context.Context, sandboxID string) error
+}
+
+type ControllerInstance struct {
+	SandboxID string
+	Pid       uint32
+	CreatedAt time.Time
+	Labels    map[string]string
+}
+
+type ExitStatus struct {
+	ExitStatus uint32
+	ExitedAt   time.Time
+}
+
+type ControllerStatus struct {
+	SandboxID string
+	Pid       uint32
+	State     string
+	Info      map[string]string
+	CreatedAt time.Time
+	ExitedAt  time.Time
+	Extra     typeurl.Any
 }

sandbox/proxy/controller.go

@@ -46,13 +46,18 @@ func (s *remoteSandboxController) Create(ctx context.Context, sandboxID string)
 	return nil
 }
 
-func (s *remoteSandboxController) Start(ctx context.Context, sandboxID string) (*api.ControllerStartResponse, error) {
+func (s *remoteSandboxController) Start(ctx context.Context, sandboxID string) (sb.ControllerInstance, error) {
 	resp, err := s.client.Start(ctx, &api.ControllerStartRequest{SandboxID: sandboxID})
 	if err != nil {
-		return nil, errdefs.FromGRPC(err)
+		return sb.ControllerInstance{}, errdefs.FromGRPC(err)
 	}
 
-	return resp, nil
+	return sb.ControllerInstance{
+		SandboxID: sandboxID,
+		Pid:       resp.GetPid(),
+		CreatedAt: resp.GetCreatedAt().AsTime(),
+		Labels:    resp.GetLabels(),
+	}, nil
 }
 
 func (s *remoteSandboxController) Platform(ctx context.Context, sandboxID string) (platforms.Platform, error) {
@@ -69,38 +74,48 @@ func (s *remoteSandboxController) Platform(ctx context.Context, sandboxID string
 	}, nil
 }
 
-func (s *remoteSandboxController) Stop(ctx context.Context, sandboxID string) (*api.ControllerStopResponse, error) {
+func (s *remoteSandboxController) Stop(ctx context.Context, sandboxID string) error {
-	resp, err := s.client.Stop(ctx, &api.ControllerStopRequest{SandboxID: sandboxID})
+	_, err := s.client.Stop(ctx, &api.ControllerStopRequest{SandboxID: sandboxID})
 	if err != nil {
-		return nil, errdefs.FromGRPC(err)
+		return errdefs.FromGRPC(err)
 	}
 
-	return resp, nil
+	return nil
 }
 
-func (s *remoteSandboxController) Shutdown(ctx context.Context, sandboxID string) (*api.ControllerShutdownResponse, error) {
+func (s *remoteSandboxController) Shutdown(ctx context.Context, sandboxID string) error {
-	resp, err := s.client.Shutdown(ctx, &api.ControllerShutdownRequest{SandboxID: sandboxID})
+	_, err := s.client.Shutdown(ctx, &api.ControllerShutdownRequest{SandboxID: sandboxID})
 	if err != nil {
-		return nil, errdefs.FromGRPC(err)
+		return errdefs.FromGRPC(err)
 	}
 
-	return resp, nil
+	return nil
 }
 
-func (s *remoteSandboxController) Wait(ctx context.Context, sandboxID string) (*api.ControllerWaitResponse, error) {
+func (s *remoteSandboxController) Wait(ctx context.Context, sandboxID string) (sb.ExitStatus, error) {
 	resp, err := s.client.Wait(ctx, &api.ControllerWaitRequest{SandboxID: sandboxID})
 	if err != nil {
-		return nil, errdefs.FromGRPC(err)
+		return sb.ExitStatus{}, errdefs.FromGRPC(err)
 	}
 
-	return resp, nil
+	return sb.ExitStatus{
+		ExitStatus: resp.GetExitStatus(),
+		ExitedAt:   resp.GetExitedAt().AsTime(),
+	}, nil
 }
 
-func (s *remoteSandboxController) Status(ctx context.Context, sandboxID string, verbose bool) (*api.ControllerStatusResponse, error) {
+func (s *remoteSandboxController) Status(ctx context.Context, sandboxID string, verbose bool) (sb.ControllerStatus, error) {
 	resp, err := s.client.Status(ctx, &api.ControllerStatusRequest{SandboxID: sandboxID, Verbose: verbose})
 	if err != nil {
-		return nil, errdefs.FromGRPC(err)
+		return sb.ControllerStatus{}, errdefs.FromGRPC(err)
 	}
-
+	return sb.ControllerStatus{
-	return resp, nil
+		SandboxID: sandboxID,
+		Pid:       resp.GetPid(),
+		State:     resp.GetState(),
+		Info:      resp.GetInfo(),
+		CreatedAt: resp.GetCreatedAt().AsTime(),
+		ExitedAt:  resp.GetExitedAt().AsTime(),
+		Extra:     resp.GetExtra(),
+	}, nil
 }

services.go

@@ -24,7 +24,6 @@ import (
 	imagesapi "github.com/containerd/containerd/api/services/images/v1"
 	introspectionapi "github.com/containerd/containerd/api/services/introspection/v1"
 	namespacesapi "github.com/containerd/containerd/api/services/namespaces/v1"
-	sandboxapi "github.com/containerd/containerd/api/services/sandbox/v1"
 	"github.com/containerd/containerd/api/services/tasks/v1"
 	"github.com/containerd/containerd/containers"
 	"github.com/containerd/containerd/content"
@@ -33,7 +32,6 @@ import (
 	"github.com/containerd/containerd/namespaces"
 	"github.com/containerd/containerd/plugin"
 	"github.com/containerd/containerd/sandbox"
-	"github.com/containerd/containerd/sandbox/proxy"
 	srv "github.com/containerd/containerd/services"
 	"github.com/containerd/containerd/services/introspection"
 	"github.com/containerd/containerd/snapshots"
@@ -173,9 +171,9 @@ func WithSandboxStore(client sandbox.Store) ServicesOpt {
 }
 
 // WithSandboxController sets the sandbox controller.
-func WithSandboxController(client sandboxapi.ControllerClient) ServicesOpt {
+func WithSandboxController(client sandbox.Controller) ServicesOpt {
 	return func(s *services) {
-		s.sandboxController = proxy.NewSandboxController(client)
+		s.sandboxController = client
 	}
 }
 
@@ -232,7 +230,7 @@ func WithInMemoryServices(ic *plugin.InitContext) ClientOpt {
 				return WithIntrospectionClient(s.(introspectionapi.IntrospectionClient))
 			},
 			srv.SandboxControllerService: func(s interface{}) ServicesOpt {
-				return WithSandboxController(s.(sandboxapi.ControllerClient))
+				return WithSandboxController(s.(sandbox.Controller))
 			},
 		} {
 			p := plugins[s]

services/sandbox/controller_local.go

@@ -217,11 +217,11 @@ func (c *controllerLocal) Status(ctx context.Context, in *api.ControllerStatusRe
 	}
 
 	return &api.ControllerStatusResponse{
-		ID:       resp.ID,
+		SandboxID: resp.SandboxID,
-		Pid:      resp.Pid,
+		Pid:       resp.Pid,
-		State:    resp.State,
+		State:     resp.State,
-		ExitedAt: resp.ExitedAt,
+		ExitedAt:  resp.ExitedAt,
-		Extra:    resp.Extra,
+		Extra:     resp.Extra,
 	}, nil
 }