diff --git a/api/execution/execution.proto b/api/execution/execution.proto
index 60e53e2..45e8396 100644
--- a/api/execution/execution.proto
+++ b/api/execution/execution.proto
@@ -38,3 +38,5 @@ message ListContainersRequest {
 message ListContainersResponse {
 	repeated Container containers = 1;
 }
+
+
diff --git a/cmd/containerd/main.go b/cmd/containerd/main.go
index d4a0bd4..a19e702 100644
--- a/cmd/containerd/main.go
+++ b/cmd/containerd/main.go
@@ -13,6 +13,8 @@ import (
 
 	"github.com/Sirupsen/logrus"
 	"github.com/docker/containerd"
+	api "github.com/docker/containerd/api/execution"
+	"github.com/docker/containerd/services/execution"
 	metrics "github.com/docker/go-metrics"
 	"github.com/urfave/cli"
 )
@@ -35,6 +37,16 @@ high performance container runtime
 			Name:  "debug",
 			Usage: "enable debug output in logs",
 		},
+		cli.StringFlag{
+			Name:  "root",
+			Usage: "containerd state directory",
+			Value: "/run/containerd",
+		},
+		cli.StringFlag{
+			Name:  "runtime",
+			Usage: "default runtime for execution",
+			Value: "runc",
+		},
 		cli.StringFlag{
 			Name:  "socket, s",
 			Usage: "socket path for containerd's GRPC server",
@@ -69,7 +81,17 @@ high performance container runtime
 			return err
 		}
 
+		execService, err := execution.New(execution.Opts{
+			Root:    context.GlobalString("root"),
+			Runtime: context.GlobalString("runtime"),
+		})
+		if err != nil {
+			return err
+		}
+
 		server := grpc.NewServer()
+		api.RegisterExecutionServiceServer(server, execService)
+		api.RegisterContainerServiceServer(server, execService)
 		go serveGRPC(server, l)
 
 		for s := range signals {
diff --git a/execution.go b/execution.go
deleted file mode 100644
index 3e7edce..0000000
--- a/execution.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package containerd
-
-import "errors"
-
-var ErrProcessSet = errors.New("container process is already set")
-
-type Runtime interface {
-	Create(*Container) (ProcessDelegate, error)
-	Start(*Container) error
-	Delete(*Container) error
-	Exec(*Container, *Process) (ProcessDelegate, error)
-	Load(id string) (ProcessDelegate, error)
-}
diff --git a/executor.go b/executor.go
new file mode 100644
index 0000000..4e8156d
--- /dev/null
+++ b/executor.go
@@ -0,0 +1,15 @@
+package containerd
+
+import "errors"
+
+var ErrProcessSet = errors.New("container process is already set")
+
+type Executor interface {
+	List() ([]*Container, error)
+	Load(id string) (*Container, error)
+
+	Create(CreateOpts) (*Container, error)
+	Start(string) error
+	Delete(string) error
+	Exec(string, *Process) (ProcessDelegate, error)
+}
diff --git a/executors/executors.go b/executors/executors.go
new file mode 100644
index 0000000..374ce3f
--- /dev/null
+++ b/executors/executors.go
@@ -0,0 +1,13 @@
+package executors
+
+import "github.com/docker/containerd"
+
+var executors = make(map[string]func() containerd.Executor)
+
+func Register(name string, e func() containerd.Executor) {
+	executors[name] = e
+}
+
+func Get(name string) func() containerd.Executor {
+	return executors[name]
+}
diff --git a/execution/oci/oci.go b/executors/oci/oci.go
similarity index 92%
rename from execution/oci/oci.go
rename to executors/oci/oci.go
index 88bf452..2b5bca4 100644
--- a/execution/oci/oci.go
+++ b/executors/oci/oci.go
@@ -5,35 +5,28 @@ import (
 	"errors"
 	"fmt"
 	"io/ioutil"
-	"os"
 	"os/exec"
 	"path/filepath"
 	"strconv"
 	"time"
 
 	"github.com/docker/containerd"
+	"github.com/docker/containerd/executors"
 )
 
 var ErrRootEmpty = errors.New("oci: runtime root cannot be an empty string")
 
-type Opts struct {
-	Name string
-	Root string
-	Args []string
+func init() {
+	executors.Register("oci", New)
+	executors.Register("runc", New)
 }
 
-func New(opts Opts) (*OCIRuntime, error) {
-	if opts.Root == "" {
-		return nil, ErrRootEmpty
-	}
-	if err := os.MkdirAll(opts.Root, 0711); err != nil {
-		return nil, err
-	}
+func New() *OCIRuntime {
 	return &OCIRuntime{
 		root: opts.Root,
 		name: opts.Name,
 		args: opts.Args,
-	}, nil
+	}
 }
 
 type OCIRuntime struct {
diff --git a/execution/oci/process.go b/executors/oci/process.go
similarity index 100%
rename from execution/oci/process.go
rename to executors/oci/process.go
diff --git a/execution/shim/containerd-shim/console.go b/executors/shim/containerd-shim/console.go
similarity index 100%
rename from execution/shim/containerd-shim/console.go
rename to executors/shim/containerd-shim/console.go
diff --git a/execution/shim/containerd-shim/console_solaris.go b/executors/shim/containerd-shim/console_solaris.go
similarity index 100%
rename from execution/shim/containerd-shim/console_solaris.go
rename to executors/shim/containerd-shim/console_solaris.go
diff --git a/execution/shim/containerd-shim/example/config.json b/executors/shim/containerd-shim/example/config.json
similarity index 100%
rename from execution/shim/containerd-shim/example/config.json
rename to executors/shim/containerd-shim/example/config.json
diff --git a/execution/shim/containerd-shim/example/init/exit b/executors/shim/containerd-shim/example/init/exit
similarity index 100%
rename from execution/shim/containerd-shim/example/init/exit
rename to executors/shim/containerd-shim/example/init/exit
diff --git a/execution/shim/containerd-shim/example/init/pid b/executors/shim/containerd-shim/example/init/pid
similarity index 100%
rename from execution/shim/containerd-shim/example/init/pid
rename to executors/shim/containerd-shim/example/init/pid
diff --git a/execution/shim/containerd-shim/example/init/process.json b/executors/shim/containerd-shim/example/init/process.json
similarity index 100%
rename from execution/shim/containerd-shim/example/init/process.json
rename to executors/shim/containerd-shim/example/init/process.json
diff --git a/execution/shim/containerd-shim/example/init/resize b/executors/shim/containerd-shim/example/init/resize
similarity index 100%
rename from execution/shim/containerd-shim/example/init/resize
rename to executors/shim/containerd-shim/example/init/resize
diff --git a/execution/shim/containerd-shim/example/init/stderr b/executors/shim/containerd-shim/example/init/stderr
similarity index 100%
rename from execution/shim/containerd-shim/example/init/stderr
rename to executors/shim/containerd-shim/example/init/stderr
diff --git a/execution/shim/containerd-shim/example/init/stdin b/executors/shim/containerd-shim/example/init/stdin
similarity index 100%
rename from execution/shim/containerd-shim/example/init/stdin
rename to executors/shim/containerd-shim/example/init/stdin
diff --git a/execution/shim/containerd-shim/example/init/stdout b/executors/shim/containerd-shim/example/init/stdout
similarity index 100%
rename from execution/shim/containerd-shim/example/init/stdout
rename to executors/shim/containerd-shim/example/init/stdout
diff --git a/execution/shim/containerd-shim/example/logger/exit b/executors/shim/containerd-shim/example/logger/exit
similarity index 100%
rename from execution/shim/containerd-shim/example/logger/exit
rename to executors/shim/containerd-shim/example/logger/exit
diff --git a/execution/shim/containerd-shim/example/logger/pid b/executors/shim/containerd-shim/example/logger/pid
similarity index 100%
rename from execution/shim/containerd-shim/example/logger/pid
rename to executors/shim/containerd-shim/example/logger/pid
diff --git a/execution/shim/containerd-shim/example/logger/process.json b/executors/shim/containerd-shim/example/logger/process.json
similarity index 100%
rename from execution/shim/containerd-shim/example/logger/process.json
rename to executors/shim/containerd-shim/example/logger/process.json
diff --git a/execution/shim/containerd-shim/example/logger/resize b/executors/shim/containerd-shim/example/logger/resize
similarity index 100%
rename from execution/shim/containerd-shim/example/logger/resize
rename to executors/shim/containerd-shim/example/logger/resize
diff --git a/execution/shim/containerd-shim/example/logger/stderr b/executors/shim/containerd-shim/example/logger/stderr
similarity index 100%
rename from execution/shim/containerd-shim/example/logger/stderr
rename to executors/shim/containerd-shim/example/logger/stderr
diff --git a/execution/shim/containerd-shim/example/logger/stdin b/executors/shim/containerd-shim/example/logger/stdin
similarity index 100%
rename from execution/shim/containerd-shim/example/logger/stdin
rename to executors/shim/containerd-shim/example/logger/stdin
diff --git a/execution/shim/containerd-shim/example/logger/stdout b/executors/shim/containerd-shim/example/logger/stdout
similarity index 100%
rename from execution/shim/containerd-shim/example/logger/stdout
rename to executors/shim/containerd-shim/example/logger/stdout
diff --git a/execution/shim/containerd-shim/main.go b/executors/shim/containerd-shim/main.go
similarity index 100%
rename from execution/shim/containerd-shim/main.go
rename to executors/shim/containerd-shim/main.go
diff --git a/execution/shim/containerd-shim/process.go b/executors/shim/containerd-shim/process.go
similarity index 100%
rename from execution/shim/containerd-shim/process.go
rename to executors/shim/containerd-shim/process.go
diff --git a/execution/shim/containerd-shim/process_pdeathsig.go b/executors/shim/containerd-shim/process_pdeathsig.go
similarity index 100%
rename from execution/shim/containerd-shim/process_pdeathsig.go
rename to executors/shim/containerd-shim/process_pdeathsig.go
diff --git a/execution/shim/containerd-shim/process_pdeathsig_unsupported.go b/executors/shim/containerd-shim/process_pdeathsig_unsupported.go
similarity index 100%
rename from execution/shim/containerd-shim/process_pdeathsig_unsupported.go
rename to executors/shim/containerd-shim/process_pdeathsig_unsupported.go
diff --git a/execution/shim/process.go b/executors/shim/process.go
similarity index 100%
rename from execution/shim/process.go
rename to executors/shim/process.go
diff --git a/execution/shim/shim.go b/executors/shim/shim.go
similarity index 100%
rename from execution/shim/shim.go
rename to executors/shim/shim.go
diff --git a/services/execution/service.go b/services/execution/service.go
new file mode 100644
index 0000000..7cbf85c
--- /dev/null
+++ b/services/execution/service.go
@@ -0,0 +1,67 @@
+package execution
+
+import (
+	"context"
+
+	"github.com/docker/containerd"
+	api "github.com/docker/containerd/api/execution"
+	"github.com/docker/containerd/executors"
+)
+
+type Opts struct {
+	Root    string
+	Runtime string
+}
+
+func New(o Opts) (*Service, error) {
+	executor, err := executors.Get(o.Runtime)(o.Root)
+	if err != nil {
+		return nil, err
+	}
+	return &Service{
+		o:        o,
+		executor: executor,
+	}, nil
+}
+
+type Service struct {
+	o        Opts
+	executor containerd.Executor
+}
+
+func (s *Service) Create(ctx context.Context, r *api.CreateContainerRequest) (*api.CreateContainerResponse, error) {
+	// TODO: write io and bundle path to dir
+	container, err := s.executor.Create(r.ID, r.BundlePath, &IO{})
+	if err != nil {
+		return nil, err
+	}
+
+	s.supervisor.Add(container.Process())
+
+	return &api.CreateContainerResponse{
+		Container: toGRPCContainer(container),
+	}, nil
+}
+
+func (s *Service) Delete(ctx context.Context, r *api.DeleteContainerRequest) (*api.Empty, error) {
+	if err := s.executor.Delete(r.ID); err != nil {
+		return nil, err
+	}
+	return nil, nil
+}
+
+func (s *Service) List(ctx context.Context, r *api.ListContainerRequest) (*api.ListContainerResponse, error) {
+	containers, err := s.executor.List()
+	if err != nil {
+		return nil, err
+	}
+	for _, c := range containers {
+		r.Containers = append(r.Containers, toGRPCContainer(c))
+	}
+	return r, nil
+}
+
+var (
+	_ = (api.ExecutionServiceServer)(&Service{})
+	_ = (api.ContainerServiceServer)(&Service{})
+)