containerd-shim-kata-v2: add the service Update support

Add the Update api support to update a running
process's resouce.

Signed-off-by: fupan <[email protected]>

containerd-shim-v2/service.go

@@ -6,6 +6,7 @@ package containerdshim
 
 import (
 	"context"
+	"encoding/json"
 	"os"
 	sysexec "os/exec"
 	"path/filepath"
@@ -24,6 +25,7 @@ import (
 	"github.com/kata-containers/runtime/pkg/katautils"
 	vc "github.com/kata-containers/runtime/virtcontainers"
 	"github.com/kata-containers/runtime/virtcontainers/pkg/oci"
+	"github.com/opencontainers/runtime-spec/specs-go"
 
 	"github.com/containerd/containerd/api/types/task"
 	ptypes "github.com/gogo/protobuf/types"
@@ -574,7 +576,20 @@ func (s *service) Stats(ctx context.Context, r *taskAPI.StatsRequest) (*taskAPI.
 
 // Update a running container
 func (s *service) Update(ctx context.Context, r *taskAPI.UpdateTaskRequest) (*ptypes.Empty, error) {
-	return nil, errdefs.ErrNotImplemented
+	s.Lock()
+	defer s.Unlock()
+
+	var resources specs.LinuxResources
+	if err := json.Unmarshal(r.Resources.Value, &resources); err != nil {
+		return empty, err
+	}
+
+	err := s.sandbox.UpdateContainer(r.ID, resources)
+	if err != nil {
+		return nil, errdefs.ToGRPC(err)
+	}
+
+	return empty, nil
 }
 
 // Wait for a process to exit