sandbox: add Sandboxer field to sandbox metadata

Signed-off-by: Abel Feng <fshb1988@gmail.com>

sandbox/helpers.go

@@ -35,6 +35,7 @@ func ToProto(sandbox *Sandbox) *types.Sandbox {
 			Name:    sandbox.Runtime.Name,
 			Options: protobuf.FromAny(sandbox.Runtime.Options),
 		},
+		Sandboxer:  sandbox.Sandboxer,
 		Labels:     sandbox.Labels,
 		CreatedAt:  protobuf.ToTimestamp(sandbox.CreatedAt),
 		UpdatedAt:  protobuf.ToTimestamp(sandbox.UpdatedAt),
@@ -61,6 +62,7 @@ func FromProto(sandboxpb *types.Sandbox) Sandbox {
 		Labels:     sandboxpb.Labels,
 		Runtime:    runtime,
 		Spec:       sandboxpb.Spec,
+		Sandboxer:  sandboxpb.Sandboxer,
 		CreatedAt:  protobuf.FromTimestamp(sandboxpb.CreatedAt),
 		UpdatedAt:  protobuf.FromTimestamp(sandboxpb.UpdatedAt),
 		Extensions: extensions,

sandbox/store.go

@@ -35,6 +35,8 @@ type Sandbox struct {
 	Runtime RuntimeOpts
 	// Spec carries the runtime specification used to implement the sandbox
 	Spec typeurl.Any
+	// Sandboxer is the sandbox controller who manages the sandbox
+	Sandboxer string
 	// CreatedAt is the time at which the sandbox was created
 	CreatedAt time.Time
 	// UpdatedAt is the time at which the sandbox was updated