Merge pull request #7228 from mxpv/sb2

Initial sandbox API CRI integration.

api/next.pb.txt

@@ -4209,9 +4209,45 @@ file {
       type: TYPE_UINT32
       json_name: "pid"
     }
+    field {
+      name: "created_at"
+      number: 3
+      label: LABEL_OPTIONAL
+      type: TYPE_MESSAGE
+      type_name: ".google.protobuf.Timestamp"
+      json_name: "createdAt"
+    }
+    field {
+      name: "labels"
+      number: 4
+      label: LABEL_REPEATED
+      type: TYPE_MESSAGE
+      type_name: ".containerd.services.sandbox.v1.ControllerStartResponse.LabelsEntry"
+      json_name: "labels"
+    }
+    nested_type {
+      name: "LabelsEntry"
+      field {
+        name: "key"
+        number: 1
+        label: LABEL_OPTIONAL
+        type: TYPE_STRING
+        json_name: "key"
+      }
+      field {
+        name: "value"
+        number: 2
+        label: LABEL_OPTIONAL
+        type: TYPE_STRING
+        json_name: "value"
+      }
+      options {
+        map_entry: true
+      }
+    }
   }
   message_type {
-    name: "ControllerShutdownRequest"
+    name: "ControllerStopRequest"
     field {
       name: "sandbox_id"
       number: 1
@@ -4228,7 +4264,7 @@ file {
     }
   }
   message_type {
-    name: "ControllerShutdownResponse"
+    name: "ControllerStopResponse"
   }
   message_type {
     name: "ControllerWaitRequest"
@@ -4315,6 +4351,19 @@ file {
       json_name: "extra"
     }
   }
+  message_type {
+    name: "ControllerDeleteRequest"
+    field {
+      name: "sandbox_id"
+      number: 1
+      label: LABEL_OPTIONAL
+      type: TYPE_STRING
+      json_name: "sandboxId"
+    }
+  }
+  message_type {
+    name: "ControllerDeleteResponse"
+  }
   service {
     name: "Store"
     method {
@@ -4351,9 +4400,9 @@ file {
       output_type: ".containerd.services.sandbox.v1.ControllerStartResponse"
     }
     method {
-      name: "Shutdown"
+      name: "Stop"
-      input_type: ".containerd.services.sandbox.v1.ControllerShutdownRequest"
+      input_type: ".containerd.services.sandbox.v1.ControllerStopRequest"
-      output_type: ".containerd.services.sandbox.v1.ControllerShutdownResponse"
+      output_type: ".containerd.services.sandbox.v1.ControllerStopResponse"
     }
     method {
       name: "Wait"
@@ -4365,6 +4414,11 @@ file {
       input_type: ".containerd.services.sandbox.v1.ControllerStatusRequest"
       output_type: ".containerd.services.sandbox.v1.ControllerStatusResponse"
     }
+    method {
+      name: "Delete"
+      input_type: ".containerd.services.sandbox.v1.ControllerDeleteRequest"
+      output_type: ".containerd.services.sandbox.v1.ControllerDeleteResponse"
+    }
   }
   options {
     go_package: "github.com/containerd/containerd/api/services/sandbox/v1;sandbox"

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

@@ -583,8 +583,10 @@ type ControllerStartResponse struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	SandboxID string `protobuf:"bytes,1,opt,name=sandbox_id,json=sandboxId,proto3" json:"sandbox_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"`
+	Pid       uint32                 `protobuf:"varint,2,opt,name=pid,proto3" json:"pid,omitempty"`
+	CreatedAt *timestamppb.Timestamp `protobuf:"bytes,3,opt,name=created_at,json=createdAt,proto3" json:"created_at,omitempty"`
+	Labels    map[string]string      `protobuf:"bytes,4,rep,name=labels,proto3" json:"labels,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
 }
 
 func (x *ControllerStartResponse) Reset() {
@@ -633,7 +635,21 @@ func (x *ControllerStartResponse) GetPid() uint32 {
 	return 0
 }
 
-type ControllerShutdownRequest struct {
+func (x *ControllerStartResponse) GetCreatedAt() *timestamppb.Timestamp {
+	if x != nil {
+		return x.CreatedAt
+	}
+	return nil
+}
+
+func (x *ControllerStartResponse) GetLabels() map[string]string {
+	if x != nil {
+		return x.Labels
+	}
+	return nil
+}
+
+type ControllerStopRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
@@ -642,8 +658,8 @@ type ControllerShutdownRequest struct {
 	TimeoutSecs uint32 `protobuf:"varint,2,opt,name=timeout_secs,json=timeoutSecs,proto3" json:"timeout_secs,omitempty"`
 }
 
-func (x *ControllerShutdownRequest) Reset() {
+func (x *ControllerStopRequest) Reset() {
-	*x = ControllerShutdownRequest{}
+	*x = ControllerStopRequest{}
 	if protoimpl.UnsafeEnabled {
 		mi := &file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
@@ -651,13 +667,13 @@ func (x *ControllerShutdownRequest) Reset() {
 	}
 }
 
-func (x *ControllerShutdownRequest) String() string {
+func (x *ControllerStopRequest) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ControllerShutdownRequest) ProtoMessage() {}
+func (*ControllerStopRequest) ProtoMessage() {}
 
-func (x *ControllerShutdownRequest) ProtoReflect() protoreflect.Message {
+func (x *ControllerStopRequest) ProtoReflect() protoreflect.Message {
 	mi := &file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
@@ -669,33 +685,33 @@ func (x *ControllerShutdownRequest) ProtoReflect() protoreflect.Message {
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ControllerShutdownRequest.ProtoReflect.Descriptor instead.
+// Deprecated: Use ControllerStopRequest.ProtoReflect.Descriptor instead.
-func (*ControllerShutdownRequest) Descriptor() ([]byte, []int) {
+func (*ControllerStopRequest) Descriptor() ([]byte, []int) {
 	return file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_rawDescGZIP(), []int{12}
 }
 
-func (x *ControllerShutdownRequest) GetSandboxID() string {
+func (x *ControllerStopRequest) GetSandboxID() string {
 	if x != nil {
 		return x.SandboxID
 	}
 	return ""
 }
 
-func (x *ControllerShutdownRequest) GetTimeoutSecs() uint32 {
+func (x *ControllerStopRequest) GetTimeoutSecs() uint32 {
 	if x != nil {
 		return x.TimeoutSecs
 	}
 	return 0
 }
 
-type ControllerShutdownResponse struct {
+type ControllerStopResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 }
 
-func (x *ControllerShutdownResponse) Reset() {
+func (x *ControllerStopResponse) Reset() {
-	*x = ControllerShutdownResponse{}
+	*x = ControllerStopResponse{}
 	if protoimpl.UnsafeEnabled {
 		mi := &file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[13]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
@@ -703,13 +719,13 @@ func (x *ControllerShutdownResponse) Reset() {
 	}
 }
 
-func (x *ControllerShutdownResponse) String() string {
+func (x *ControllerStopResponse) String() string {
 	return protoimpl.X.MessageStringOf(x)
 }
 
-func (*ControllerShutdownResponse) ProtoMessage() {}
+func (*ControllerStopResponse) ProtoMessage() {}
 
-func (x *ControllerShutdownResponse) ProtoReflect() protoreflect.Message {
+func (x *ControllerStopResponse) ProtoReflect() protoreflect.Message {
 	mi := &file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[13]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
@@ -721,8 +737,8 @@ func (x *ControllerShutdownResponse) ProtoReflect() protoreflect.Message {
 	return mi.MessageOf(x)
 }
 
-// Deprecated: Use ControllerShutdownResponse.ProtoReflect.Descriptor instead.
+// Deprecated: Use ControllerStopResponse.ProtoReflect.Descriptor instead.
-func (*ControllerShutdownResponse) Descriptor() ([]byte, []int) {
+func (*ControllerStopResponse) Descriptor() ([]byte, []int) {
 	return file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_rawDescGZIP(), []int{13}
 }
 
@@ -962,6 +978,91 @@ func (x *ControllerStatusResponse) GetExtra() *anypb.Any {
 	return nil
 }
 
+type ControllerDeleteRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	SandboxID string `protobuf:"bytes,1,opt,name=sandbox_id,json=sandboxId,proto3" json:"sandbox_id,omitempty"`
+}
+
+func (x *ControllerDeleteRequest) Reset() {
+	*x = ControllerDeleteRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[18]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ControllerDeleteRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ControllerDeleteRequest) ProtoMessage() {}
+
+func (x *ControllerDeleteRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[18]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ControllerDeleteRequest.ProtoReflect.Descriptor instead.
+func (*ControllerDeleteRequest) Descriptor() ([]byte, []int) {
+	return file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_rawDescGZIP(), []int{18}
+}
+
+func (x *ControllerDeleteRequest) GetSandboxID() string {
+	if x != nil {
+		return x.SandboxID
+	}
+	return ""
+}
+
+type ControllerDeleteResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *ControllerDeleteResponse) Reset() {
+	*x = ControllerDeleteResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[19]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ControllerDeleteResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ControllerDeleteResponse) ProtoMessage() {}
+
+func (x *ControllerDeleteResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[19]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ControllerDeleteResponse.ProtoReflect.Descriptor instead.
+func (*ControllerDeleteResponse) Descriptor() ([]byte, []int) {
+	return file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_rawDescGZIP(), []int{19}
+}
+
 var File_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto protoreflect.FileDescriptor
 
 var file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_rawDesc = []byte{
@@ -1032,120 +1133,145 @@ var file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_
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 var (
@@ -1160,66 +1286,73 @@ func file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto
 	return file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_rawDescData
 }
 
-var file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes = make([]protoimpl.MessageInfo, 18)
+var file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes = make([]protoimpl.MessageInfo, 21)
 var file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_goTypes = []interface{}{
-	(*StoreCreateRequest)(nil),         // 0: containerd.services.sandbox.v1.StoreCreateRequest
+	(*StoreCreateRequest)(nil),       // 0: containerd.services.sandbox.v1.StoreCreateRequest
-	(*StoreCreateResponse)(nil),        // 1: containerd.services.sandbox.v1.StoreCreateResponse
+	(*StoreCreateResponse)(nil),      // 1: containerd.services.sandbox.v1.StoreCreateResponse
-	(*StoreUpdateRequest)(nil),         // 2: containerd.services.sandbox.v1.StoreUpdateRequest
+	(*StoreUpdateRequest)(nil),       // 2: containerd.services.sandbox.v1.StoreUpdateRequest
-	(*StoreUpdateResponse)(nil),        // 3: containerd.services.sandbox.v1.StoreUpdateResponse
+	(*StoreUpdateResponse)(nil),      // 3: containerd.services.sandbox.v1.StoreUpdateResponse
-	(*StoreDeleteRequest)(nil),         // 4: containerd.services.sandbox.v1.StoreDeleteRequest
+	(*StoreDeleteRequest)(nil),       // 4: containerd.services.sandbox.v1.StoreDeleteRequest
-	(*StoreDeleteResponse)(nil),        // 5: containerd.services.sandbox.v1.StoreDeleteResponse
+	(*StoreDeleteResponse)(nil),      // 5: containerd.services.sandbox.v1.StoreDeleteResponse
-	(*StoreListRequest)(nil),           // 6: containerd.services.sandbox.v1.StoreListRequest
+	(*StoreListRequest)(nil),         // 6: containerd.services.sandbox.v1.StoreListRequest
-	(*StoreListResponse)(nil),          // 7: containerd.services.sandbox.v1.StoreListResponse
+	(*StoreListResponse)(nil),        // 7: containerd.services.sandbox.v1.StoreListResponse
-	(*StoreGetRequest)(nil),            // 8: containerd.services.sandbox.v1.StoreGetRequest
+	(*StoreGetRequest)(nil),          // 8: containerd.services.sandbox.v1.StoreGetRequest
-	(*StoreGetResponse)(nil),           // 9: containerd.services.sandbox.v1.StoreGetResponse
+	(*StoreGetResponse)(nil),         // 9: containerd.services.sandbox.v1.StoreGetResponse
-	(*ControllerStartRequest)(nil),     // 10: containerd.services.sandbox.v1.ControllerStartRequest
+	(*ControllerStartRequest)(nil),   // 10: containerd.services.sandbox.v1.ControllerStartRequest
-	(*ControllerStartResponse)(nil),    // 11: containerd.services.sandbox.v1.ControllerStartResponse
+	(*ControllerStartResponse)(nil),  // 11: containerd.services.sandbox.v1.ControllerStartResponse
-	(*ControllerShutdownRequest)(nil),  // 12: containerd.services.sandbox.v1.ControllerShutdownRequest
+	(*ControllerStopRequest)(nil),    // 12: containerd.services.sandbox.v1.ControllerStopRequest
-	(*ControllerShutdownResponse)(nil), // 13: containerd.services.sandbox.v1.ControllerShutdownResponse
+	(*ControllerStopResponse)(nil),   // 13: containerd.services.sandbox.v1.ControllerStopResponse
-	(*ControllerWaitRequest)(nil),      // 14: containerd.services.sandbox.v1.ControllerWaitRequest
+	(*ControllerWaitRequest)(nil),    // 14: containerd.services.sandbox.v1.ControllerWaitRequest
-	(*ControllerWaitResponse)(nil),     // 15: containerd.services.sandbox.v1.ControllerWaitResponse
+	(*ControllerWaitResponse)(nil),   // 15: containerd.services.sandbox.v1.ControllerWaitResponse
-	(*ControllerStatusRequest)(nil),    // 16: containerd.services.sandbox.v1.ControllerStatusRequest
+	(*ControllerStatusRequest)(nil),  // 16: containerd.services.sandbox.v1.ControllerStatusRequest
-	(*ControllerStatusResponse)(nil),   // 17: containerd.services.sandbox.v1.ControllerStatusResponse
+	(*ControllerStatusResponse)(nil), // 17: containerd.services.sandbox.v1.ControllerStatusResponse
-	(*types.Sandbox)(nil),              // 18: containerd.types.Sandbox
+	(*ControllerDeleteRequest)(nil),  // 18: containerd.services.sandbox.v1.ControllerDeleteRequest
-	(*types.Mount)(nil),                // 19: containerd.types.Mount
+	(*ControllerDeleteResponse)(nil), // 19: containerd.services.sandbox.v1.ControllerDeleteResponse
-	(*anypb.Any)(nil),                  // 20: google.protobuf.Any
+	nil,                              // 20: containerd.services.sandbox.v1.ControllerStartResponse.LabelsEntry
-	(*timestamppb.Timestamp)(nil),      // 21: google.protobuf.Timestamp
+	(*types.Sandbox)(nil),            // 21: containerd.types.Sandbox
+	(*types.Mount)(nil),              // 22: containerd.types.Mount
+	(*anypb.Any)(nil),                // 23: google.protobuf.Any
+	(*timestamppb.Timestamp)(nil),    // 24: google.protobuf.Timestamp
 }
 var file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_depIdxs = []int32{
-	18, // 0: containerd.services.sandbox.v1.StoreCreateRequest.sandbox:type_name -> containerd.types.Sandbox
+	21, // 0: containerd.services.sandbox.v1.StoreCreateRequest.sandbox:type_name -> containerd.types.Sandbox
-	18, // 1: containerd.services.sandbox.v1.StoreCreateResponse.sandbox:type_name -> containerd.types.Sandbox
+	21, // 1: containerd.services.sandbox.v1.StoreCreateResponse.sandbox:type_name -> containerd.types.Sandbox
-	18, // 2: containerd.services.sandbox.v1.StoreUpdateRequest.sandbox:type_name -> containerd.types.Sandbox
+	21, // 2: containerd.services.sandbox.v1.StoreUpdateRequest.sandbox:type_name -> containerd.types.Sandbox
-	18, // 3: containerd.services.sandbox.v1.StoreUpdateResponse.sandbox:type_name -> containerd.types.Sandbox
+	21, // 3: containerd.services.sandbox.v1.StoreUpdateResponse.sandbox:type_name -> containerd.types.Sandbox
-	18, // 4: containerd.services.sandbox.v1.StoreListResponse.list:type_name -> containerd.types.Sandbox
+	21, // 4: containerd.services.sandbox.v1.StoreListResponse.list:type_name -> containerd.types.Sandbox
-	18, // 5: containerd.services.sandbox.v1.StoreGetResponse.sandbox:type_name -> containerd.types.Sandbox
+	21, // 5: containerd.services.sandbox.v1.StoreGetResponse.sandbox:type_name -> containerd.types.Sandbox
-	19, // 6: containerd.services.sandbox.v1.ControllerStartRequest.rootfs:type_name -> containerd.types.Mount
+	22, // 6: containerd.services.sandbox.v1.ControllerStartRequest.rootfs:type_name -> containerd.types.Mount
-	20, // 7: containerd.services.sandbox.v1.ControllerStartRequest.options:type_name -> google.protobuf.Any
+	23, // 7: containerd.services.sandbox.v1.ControllerStartRequest.options:type_name -> google.protobuf.Any
-	21, // 8: containerd.services.sandbox.v1.ControllerWaitResponse.exited_at:type_name -> google.protobuf.Timestamp
+	24, // 8: containerd.services.sandbox.v1.ControllerStartResponse.created_at:type_name -> google.protobuf.Timestamp
-	21, // 9: containerd.services.sandbox.v1.ControllerStatusResponse.exited_at:type_name -> google.protobuf.Timestamp
+	20, // 9: containerd.services.sandbox.v1.ControllerStartResponse.labels:type_name -> containerd.services.sandbox.v1.ControllerStartResponse.LabelsEntry
-	20, // 10: containerd.services.sandbox.v1.ControllerStatusResponse.extra:type_name -> google.protobuf.Any
+	24, // 10: containerd.services.sandbox.v1.ControllerWaitResponse.exited_at:type_name -> google.protobuf.Timestamp
-	0,  // 11: containerd.services.sandbox.v1.Store.Create:input_type -> containerd.services.sandbox.v1.StoreCreateRequest
+	24, // 11: containerd.services.sandbox.v1.ControllerStatusResponse.exited_at:type_name -> google.protobuf.Timestamp
-	2,  // 12: containerd.services.sandbox.v1.Store.Update:input_type -> containerd.services.sandbox.v1.StoreUpdateRequest
+	23, // 12: containerd.services.sandbox.v1.ControllerStatusResponse.extra:type_name -> google.protobuf.Any
-	4,  // 13: containerd.services.sandbox.v1.Store.Delete:input_type -> containerd.services.sandbox.v1.StoreDeleteRequest
+	0,  // 13: containerd.services.sandbox.v1.Store.Create:input_type -> containerd.services.sandbox.v1.StoreCreateRequest
-	6,  // 14: containerd.services.sandbox.v1.Store.List:input_type -> containerd.services.sandbox.v1.StoreListRequest
+	2,  // 14: containerd.services.sandbox.v1.Store.Update:input_type -> containerd.services.sandbox.v1.StoreUpdateRequest
-	8,  // 15: containerd.services.sandbox.v1.Store.Get:input_type -> containerd.services.sandbox.v1.StoreGetRequest
+	4,  // 15: containerd.services.sandbox.v1.Store.Delete:input_type -> containerd.services.sandbox.v1.StoreDeleteRequest
-	10, // 16: containerd.services.sandbox.v1.Controller.Start:input_type -> containerd.services.sandbox.v1.ControllerStartRequest
+	6,  // 16: containerd.services.sandbox.v1.Store.List:input_type -> containerd.services.sandbox.v1.StoreListRequest
-	12, // 17: containerd.services.sandbox.v1.Controller.Shutdown:input_type -> containerd.services.sandbox.v1.ControllerShutdownRequest
+	8,  // 17: containerd.services.sandbox.v1.Store.Get:input_type -> containerd.services.sandbox.v1.StoreGetRequest
-	14, // 18: containerd.services.sandbox.v1.Controller.Wait:input_type -> containerd.services.sandbox.v1.ControllerWaitRequest
+	10, // 18: containerd.services.sandbox.v1.Controller.Start:input_type -> containerd.services.sandbox.v1.ControllerStartRequest
-	16, // 19: containerd.services.sandbox.v1.Controller.Status:input_type -> containerd.services.sandbox.v1.ControllerStatusRequest
+	12, // 19: containerd.services.sandbox.v1.Controller.Stop:input_type -> containerd.services.sandbox.v1.ControllerStopRequest
-	1,  // 20: containerd.services.sandbox.v1.Store.Create:output_type -> containerd.services.sandbox.v1.StoreCreateResponse
+	14, // 20: containerd.services.sandbox.v1.Controller.Wait:input_type -> containerd.services.sandbox.v1.ControllerWaitRequest
-	3,  // 21: containerd.services.sandbox.v1.Store.Update:output_type -> containerd.services.sandbox.v1.StoreUpdateResponse
+	16, // 21: containerd.services.sandbox.v1.Controller.Status:input_type -> containerd.services.sandbox.v1.ControllerStatusRequest
-	5,  // 22: containerd.services.sandbox.v1.Store.Delete:output_type -> containerd.services.sandbox.v1.StoreDeleteResponse
+	18, // 22: containerd.services.sandbox.v1.Controller.Delete:input_type -> containerd.services.sandbox.v1.ControllerDeleteRequest
-	7,  // 23: containerd.services.sandbox.v1.Store.List:output_type -> containerd.services.sandbox.v1.StoreListResponse
+	1,  // 23: containerd.services.sandbox.v1.Store.Create:output_type -> containerd.services.sandbox.v1.StoreCreateResponse
-	9,  // 24: containerd.services.sandbox.v1.Store.Get:output_type -> containerd.services.sandbox.v1.StoreGetResponse
+	3,  // 24: containerd.services.sandbox.v1.Store.Update:output_type -> containerd.services.sandbox.v1.StoreUpdateResponse
-	11, // 25: containerd.services.sandbox.v1.Controller.Start:output_type -> containerd.services.sandbox.v1.ControllerStartResponse
+	5,  // 25: containerd.services.sandbox.v1.Store.Delete:output_type -> containerd.services.sandbox.v1.StoreDeleteResponse
-	13, // 26: containerd.services.sandbox.v1.Controller.Shutdown:output_type -> containerd.services.sandbox.v1.ControllerShutdownResponse
+	7,  // 26: containerd.services.sandbox.v1.Store.List:output_type -> containerd.services.sandbox.v1.StoreListResponse
-	15, // 27: containerd.services.sandbox.v1.Controller.Wait:output_type -> containerd.services.sandbox.v1.ControllerWaitResponse
+	9,  // 27: containerd.services.sandbox.v1.Store.Get:output_type -> containerd.services.sandbox.v1.StoreGetResponse
-	17, // 28: containerd.services.sandbox.v1.Controller.Status:output_type -> containerd.services.sandbox.v1.ControllerStatusResponse
+	11, // 28: containerd.services.sandbox.v1.Controller.Start:output_type -> containerd.services.sandbox.v1.ControllerStartResponse
-	20, // [20:29] is the sub-list for method output_type
+	13, // 29: containerd.services.sandbox.v1.Controller.Stop:output_type -> containerd.services.sandbox.v1.ControllerStopResponse
-	11, // [11:20] is the sub-list for method input_type
+	15, // 30: containerd.services.sandbox.v1.Controller.Wait:output_type -> containerd.services.sandbox.v1.ControllerWaitResponse
-	11, // [11:11] is the sub-list for extension type_name
+	17, // 31: containerd.services.sandbox.v1.Controller.Status:output_type -> containerd.services.sandbox.v1.ControllerStatusResponse
-	11, // [11:11] is the sub-list for extension extendee
+	19, // 32: containerd.services.sandbox.v1.Controller.Delete:output_type -> containerd.services.sandbox.v1.ControllerDeleteResponse
-	0,  // [0:11] is the sub-list for field type_name
+	23, // [23:33] is the sub-list for method output_type
+	13, // [13:23] is the sub-list for method input_type
+	13, // [13:13] is the sub-list for extension type_name
+	13, // [13:13] is the sub-list for extension extendee
+	0,  // [0:13] is the sub-list for field type_name
 }
 
 func init() { file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_init() }
@@ -1373,7 +1506,7 @@ func file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto
 			}
 		}
 		file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ControllerShutdownRequest); i {
+			switch v := v.(*ControllerStopRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1385,7 +1518,7 @@ func file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto
 			}
 		}
 		file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ControllerShutdownResponse); i {
+			switch v := v.(*ControllerStopResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1444,6 +1577,30 @@ func file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto
 				return nil
 			}
 		}
+		file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[18].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ControllerDeleteRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_msgTypes[19].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ControllerDeleteResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -1451,7 +1608,7 @@ func file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_github_com_containerd_containerd_api_services_sandbox_v1_sandbox_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   18,
+			NumMessages:   21,
 			NumExtensions: 0,
 			NumServices:   2,
 		},

api/services/sandbox/v1/sandbox.proto

@@ -86,9 +86,10 @@ message StoreGetResponse {
 // Controller is an interface to manage runtime sandbox instances.
 service Controller {
 	rpc Start(ControllerStartRequest) returns (ControllerStartResponse);
-	rpc Shutdown(ControllerShutdownRequest) returns (ControllerShutdownResponse);
+	rpc Stop(ControllerStopRequest) returns (ControllerStopResponse);
 	rpc Wait(ControllerWaitRequest) returns (ControllerWaitResponse);
 	rpc Status(ControllerStatusRequest) returns (ControllerStatusResponse);
+	rpc Delete(ControllerDeleteRequest) returns (ControllerDeleteResponse);
 }
 
 message ControllerStartRequest {
@@ -100,14 +101,16 @@ message ControllerStartRequest {
 message ControllerStartResponse {
 	string sandbox_id = 1;
 	uint32 pid = 2;
+	google.protobuf.Timestamp created_at = 3;
+	map<string, string> labels = 4;
 }
 
-message ControllerShutdownRequest {
+message ControllerStopRequest {
 	string sandbox_id = 1;
 	uint32 timeout_secs = 2;
 }
 
-message ControllerShutdownResponse {}
+message ControllerStopResponse {}
 
 message ControllerWaitRequest {
 	string sandbox_id = 1;
@@ -130,3 +133,9 @@ message ControllerStatusResponse {
 	google.protobuf.Timestamp exited_at = 5;
 	google.protobuf.Any extra = 6;
 }
+
+message ControllerDeleteRequest {
+	string sandbox_id = 1;
+}
+
+message ControllerDeleteResponse {}

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

@@ -253,9 +253,10 @@ var Store_ServiceDesc = grpc.ServiceDesc{
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type ControllerClient interface {
 	Start(ctx context.Context, in *ControllerStartRequest, opts ...grpc.CallOption) (*ControllerStartResponse, error)
-	Shutdown(ctx context.Context, in *ControllerShutdownRequest, opts ...grpc.CallOption) (*ControllerShutdownResponse, error)
+	Stop(ctx context.Context, in *ControllerStopRequest, opts ...grpc.CallOption) (*ControllerStopResponse, error)
 	Wait(ctx context.Context, in *ControllerWaitRequest, opts ...grpc.CallOption) (*ControllerWaitResponse, error)
 	Status(ctx context.Context, in *ControllerStatusRequest, opts ...grpc.CallOption) (*ControllerStatusResponse, error)
+	Delete(ctx context.Context, in *ControllerDeleteRequest, opts ...grpc.CallOption) (*ControllerDeleteResponse, error)
 }
 
 type controllerClient struct {
@@ -275,9 +276,9 @@ func (c *controllerClient) Start(ctx context.Context, in *ControllerStartRequest
 	return out, nil
 }
 
-func (c *controllerClient) Shutdown(ctx context.Context, in *ControllerShutdownRequest, opts ...grpc.CallOption) (*ControllerShutdownResponse, error) {
+func (c *controllerClient) Stop(ctx context.Context, in *ControllerStopRequest, opts ...grpc.CallOption) (*ControllerStopResponse, error) {
-	out := new(ControllerShutdownResponse)
+	out := new(ControllerStopResponse)
-	err := c.cc.Invoke(ctx, "/containerd.services.sandbox.v1.Controller/Shutdown", in, out, opts...)
+	err := c.cc.Invoke(ctx, "/containerd.services.sandbox.v1.Controller/Stop", in, out, opts...)
 	if err != nil {
 		return nil, err
 	}
@@ -302,14 +303,24 @@ func (c *controllerClient) Status(ctx context.Context, in *ControllerStatusReque
 	return out, nil
 }
 
+func (c *controllerClient) Delete(ctx context.Context, in *ControllerDeleteRequest, opts ...grpc.CallOption) (*ControllerDeleteResponse, error) {
+	out := new(ControllerDeleteResponse)
+	err := c.cc.Invoke(ctx, "/containerd.services.sandbox.v1.Controller/Delete", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // ControllerServer is the server API for Controller service.
 // All implementations must embed UnimplementedControllerServer
 // for forward compatibility
 type ControllerServer interface {
 	Start(context.Context, *ControllerStartRequest) (*ControllerStartResponse, error)
-	Shutdown(context.Context, *ControllerShutdownRequest) (*ControllerShutdownResponse, error)
+	Stop(context.Context, *ControllerStopRequest) (*ControllerStopResponse, error)
 	Wait(context.Context, *ControllerWaitRequest) (*ControllerWaitResponse, error)
 	Status(context.Context, *ControllerStatusRequest) (*ControllerStatusResponse, error)
+	Delete(context.Context, *ControllerDeleteRequest) (*ControllerDeleteResponse, error)
 	mustEmbedUnimplementedControllerServer()
 }
 
@@ -320,8 +331,8 @@ type UnimplementedControllerServer struct {
 func (UnimplementedControllerServer) Start(context.Context, *ControllerStartRequest) (*ControllerStartResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method Start not implemented")
 }
-func (UnimplementedControllerServer) Shutdown(context.Context, *ControllerShutdownRequest) (*ControllerShutdownResponse, error) {
+func (UnimplementedControllerServer) Stop(context.Context, *ControllerStopRequest) (*ControllerStopResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method Shutdown not implemented")
+	return nil, status.Errorf(codes.Unimplemented, "method Stop not implemented")
 }
 func (UnimplementedControllerServer) Wait(context.Context, *ControllerWaitRequest) (*ControllerWaitResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method Wait not implemented")
@@ -329,6 +340,9 @@ func (UnimplementedControllerServer) Wait(context.Context, *ControllerWaitReques
 func (UnimplementedControllerServer) Status(context.Context, *ControllerStatusRequest) (*ControllerStatusResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method Status not implemented")
 }
+func (UnimplementedControllerServer) Delete(context.Context, *ControllerDeleteRequest) (*ControllerDeleteResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Delete not implemented")
+}
 func (UnimplementedControllerServer) mustEmbedUnimplementedControllerServer() {}
 
 // UnsafeControllerServer may be embedded to opt out of forward compatibility for this service.
@@ -360,20 +374,20 @@ func _Controller_Start_Handler(srv interface{}, ctx context.Context, dec func(in
 	return interceptor(ctx, in, info, handler)
 }
 
-func _Controller_Shutdown_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+func _Controller_Stop_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(ControllerShutdownRequest)
+	in := new(ControllerStopRequest)
 	if err := dec(in); err != nil {
 		return nil, err
 	}
 	if interceptor == nil {
-		return srv.(ControllerServer).Shutdown(ctx, in)
+		return srv.(ControllerServer).Stop(ctx, in)
 	}
 	info := &grpc.UnaryServerInfo{
 		Server:     srv,
-		FullMethod: "/containerd.services.sandbox.v1.Controller/Shutdown",
+		FullMethod: "/containerd.services.sandbox.v1.Controller/Stop",
 	}
 	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(ControllerServer).Shutdown(ctx, req.(*ControllerShutdownRequest))
+		return srv.(ControllerServer).Stop(ctx, req.(*ControllerStopRequest))
 	}
 	return interceptor(ctx, in, info, handler)
 }
@@ -414,6 +428,24 @@ func _Controller_Status_Handler(srv interface{}, ctx context.Context, dec func(i
 	return interceptor(ctx, in, info, handler)
 }
 
+func _Controller_Delete_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ControllerDeleteRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ControllerServer).Delete(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/containerd.services.sandbox.v1.Controller/Delete",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ControllerServer).Delete(ctx, req.(*ControllerDeleteRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // Controller_ServiceDesc is the grpc.ServiceDesc for Controller service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -426,8 +458,8 @@ var Controller_ServiceDesc = grpc.ServiceDesc{
 			Handler:    _Controller_Start_Handler,
 		},
 		{
-			MethodName: "Shutdown",
+			MethodName: "Stop",
-			Handler:    _Controller_Shutdown_Handler,
+			Handler:    _Controller_Stop_Handler,
 		},
 		{
 			MethodName: "Wait",
@@ -437,6 +469,10 @@ var Controller_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "Status",
 			Handler:    _Controller_Status_Handler,
 		},
+		{
+			MethodName: "Delete",
+			Handler:    _Controller_Delete_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "github.com/containerd/containerd/api/services/sandbox/v1/sandbox.proto",

integration/build_local_containerd_helper_test_linux.go

@@ -19,5 +19,6 @@ package integration
 import (
 	// Register for linux platforms
 	_ "github.com/containerd/containerd/runtime/v1/linux"
+	_ "github.com/containerd/containerd/services/sandbox" // WithInMemoryServices will fail otherwise
 	_ "github.com/containerd/containerd/snapshots/overlay/plugin"
 )

metadata/sandbox.go

@@ -369,9 +369,5 @@ func (s *sandboxStore) validate(new *api.Sandbox) error {
 		return fmt.Errorf("updated date must not be zero: %w", errdefs.ErrInvalidArgument)
 	}
 
-	if new.Runtime.Name == "" {
-		return fmt.Errorf("sandbox.Runtime.Name must be set: %w", errdefs.ErrInvalidArgument)
-	}
-
 	return nil
 }

pkg/cri/sbserver/helpers.go

@@ -46,6 +46,8 @@ import (
 	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
 )
 
+// TODO: Move common helpers for sbserver and podsandbox to a dedicated package once basic services are functinal.
+
 const (
 	// errorStartReason is the exit reason when fails to start container.
 	errorStartReason = "StartError"
@@ -219,9 +221,9 @@ func getUserFromImage(user string) (*int64, string) {
 	return &uid, ""
 }
 
-// ensureImageExists returns corresponding metadata of the image reference, if image is not
+// EnsureImageExists returns corresponding metadata of the image reference, if image is not
 // pulled yet, the function will pull the image.
-func (c *criService) ensureImageExists(ctx context.Context, ref string, config *runtime.PodSandboxConfig) (*imagestore.Image, error) {
+func (c *criService) EnsureImageExists(ctx context.Context, ref string, config *runtime.PodSandboxConfig) (*imagestore.Image, error) {
 	image, err := c.localResolve(ref)
 	if err != nil && !errdefs.IsNotFound(err) {
 		return nil, fmt.Errorf("failed to get image %q: %w", ref, err)

pkg/cri/sbserver/helpers_linux.go

@@ -35,16 +35,11 @@ import (
 	"github.com/containerd/containerd/pkg/seutil"
 	"github.com/moby/sys/mountinfo"
 	"github.com/opencontainers/runtime-spec/specs-go"
-	"github.com/opencontainers/selinux/go-selinux/label"
 	"golang.org/x/sys/unix"
 	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
 )
 
 const (
-	// defaultSandboxOOMAdj is default omm adj for sandbox container. (kubernetes#47938).
-	defaultSandboxOOMAdj = -998
-	// defaultShmSize is the default size of the sandbox shm.
-	defaultShmSize = int64(1024 * 1024 * 64)
 	// relativeRootfsPath is the rootfs path relative to bundle path.
 	relativeRootfsPath = "rootfs"
 	// devShm is the default path of /dev/shm.
@@ -115,14 +110,6 @@ func toLabel(selinuxOptions *runtime.SELinuxOption) ([]string, error) {
 	return labels, nil
 }
 
-func initLabelsFromOpt(selinuxOpts *runtime.SELinuxOption) (string, string, error) {
-	labels, err := toLabel(selinuxOpts)
-	if err != nil {
-		return "", "", err
-	}
-	return label.InitLabels(labels)
-}
-
 func checkSelinuxLevel(level string) error {
 	if len(level) == 0 {
 		return nil

pkg/cri/sbserver/podsandbox/container_linux.go

@@ -0,0 +1,148 @@
+/*
+   Copyright The containerd 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.
+*/
+
+// TODO: these are copied from container_create_linux.go and should be consolidated later.
+
+package podsandbox
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/containerd/containerd/contrib/seccomp"
+	"github.com/containerd/containerd/oci"
+	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
+)
+
+const (
+	// profileNamePrefix is the prefix for loading profiles on a localhost. Eg. AppArmor localhost/profileName.
+	profileNamePrefix = "localhost/" // TODO (mikebrow): get localhost/ & runtime/default from CRI kubernetes/kubernetes#51747
+	// runtimeDefault indicates that we should use or create a runtime default profile.
+	runtimeDefault = "runtime/default"
+	// dockerDefault indicates that we should use or create a docker default profile.
+	dockerDefault = "docker/default"
+	// unconfinedProfile is a string indicating one should run a pod/containerd without a security profile
+	unconfinedProfile = "unconfined"
+)
+
+// generateSeccompSpecOpts generates containerd SpecOpts for seccomp.
+func (c *Controller) generateSeccompSpecOpts(sp *runtime.SecurityProfile, privileged, seccompEnabled bool) (oci.SpecOpts, error) {
+	if privileged {
+		// Do not set seccomp profile when container is privileged
+		return nil, nil
+	}
+	if !seccompEnabled {
+		if sp != nil {
+			if sp.ProfileType != runtime.SecurityProfile_Unconfined {
+				return nil, errors.New("seccomp is not supported")
+			}
+		}
+		return nil, nil
+	}
+
+	if sp == nil {
+		return nil, nil
+	}
+
+	if sp.ProfileType != runtime.SecurityProfile_Localhost && sp.LocalhostRef != "" {
+		return nil, errors.New("seccomp config invalid LocalhostRef must only be set if ProfileType is Localhost")
+	}
+	switch sp.ProfileType {
+	case runtime.SecurityProfile_Unconfined:
+		// Do not set seccomp profile.
+		return nil, nil
+	case runtime.SecurityProfile_RuntimeDefault:
+		return seccomp.WithDefaultProfile(), nil
+	case runtime.SecurityProfile_Localhost:
+		// trimming the localhost/ prefix just in case even though it should not
+		// be necessary with the new SecurityProfile struct
+		return seccomp.WithProfile(strings.TrimPrefix(sp.LocalhostRef, profileNamePrefix)), nil
+	default:
+		return nil, errors.New("seccomp unknown ProfileType")
+	}
+}
+
+func generateSeccompSecurityProfile(profilePath string, unsetProfilePath string) (*runtime.SecurityProfile, error) {
+	if profilePath != "" {
+		return generateSecurityProfile(profilePath)
+	}
+	if unsetProfilePath != "" {
+		return generateSecurityProfile(unsetProfilePath)
+	}
+	return nil, nil
+}
+
+func generateSecurityProfile(profilePath string) (*runtime.SecurityProfile, error) {
+	switch profilePath {
+	case runtimeDefault, dockerDefault, "":
+		return &runtime.SecurityProfile{
+			ProfileType: runtime.SecurityProfile_RuntimeDefault,
+		}, nil
+	case unconfinedProfile:
+		return &runtime.SecurityProfile{
+			ProfileType: runtime.SecurityProfile_Unconfined,
+		}, nil
+	default:
+		// Require and Trim default profile name prefix
+		if !strings.HasPrefix(profilePath, profileNamePrefix) {
+			return nil, fmt.Errorf("invalid profile %q", profilePath)
+		}
+		return &runtime.SecurityProfile{
+			ProfileType:  runtime.SecurityProfile_Localhost,
+			LocalhostRef: strings.TrimPrefix(profilePath, profileNamePrefix),
+		}, nil
+	}
+}
+
+// generateUserString generates valid user string based on OCI Image Spec
+// v1.0.0.
+//
+// CRI defines that the following combinations are valid:
+//
+// (none) -> ""
+// username -> username
+// username, uid -> username
+// username, uid, gid -> username:gid
+// username, gid -> username:gid
+// uid -> uid
+// uid, gid -> uid:gid
+// gid -> error
+//
+// TODO(random-liu): Add group name support in CRI.
+func generateUserString(username string, uid, gid *runtime.Int64Value) (string, error) {
+	var userstr, groupstr string
+	if uid != nil {
+		userstr = strconv.FormatInt(uid.GetValue(), 10)
+	}
+	if username != "" {
+		userstr = username
+	}
+	if gid != nil {
+		groupstr = strconv.FormatInt(gid.GetValue(), 10)
+	}
+	if userstr == "" {
+		if groupstr != "" {
+			return "", fmt.Errorf("user group %q is specified without user", groupstr)
+		}
+		return "", nil
+	}
+	if groupstr != "" {
+		userstr = userstr + ":" + groupstr
+	}
+	return userstr, nil
+}

pkg/cri/sbserver/podsandbox/controller.go

@@ -0,0 +1,93 @@
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	"context"
+
+	"github.com/containerd/containerd"
+	api "github.com/containerd/containerd/api/services/sandbox/v1"
+	"github.com/containerd/containerd/oci"
+	criconfig "github.com/containerd/containerd/pkg/cri/config"
+	imagestore "github.com/containerd/containerd/pkg/cri/store/image"
+	sandboxstore "github.com/containerd/containerd/pkg/cri/store/sandbox"
+	osinterface "github.com/containerd/containerd/pkg/os"
+	"github.com/containerd/containerd/sandbox"
+	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
+)
+
+// CRIService interface contains things required by controller, but not yet refactored from criService.
+// TODO: this will be removed in subsequent iterations.
+type CRIService interface {
+	EnsureImageExists(ctx context.Context, ref string, config *runtime.PodSandboxConfig) (*imagestore.Image, error)
+
+	// TODO: we should implement Controller.Wait and use it instead of this to monitor sandbox exit.
+	StartSandboxExitMonitor(ctx context.Context, id string, pid uint32, exitCh <-chan containerd.ExitStatus) <-chan struct{}
+}
+
+type Controller struct {
+	// config contains all configurations.
+	config criconfig.Config
+	// client is an instance of the containerd client
+	client *containerd.Client
+	// sandboxStore stores all resources associated with sandboxes.
+	sandboxStore *sandboxstore.Store
+	// os is an interface for all required os operations.
+	os osinterface.OS
+	// cri is CRI service that provides missing gaps needed by controller.
+	cri CRIService
+	// baseOCISpecs contains cached OCI specs loaded via `Runtime.BaseRuntimeSpec`
+	baseOCISpecs map[string]*oci.Spec
+}
+
+func New(
+	config criconfig.Config,
+	client *containerd.Client,
+	sandboxStore *sandboxstore.Store,
+	os osinterface.OS,
+	cri CRIService,
+	baseOCISpecs map[string]*oci.Spec,
+) *Controller {
+	return &Controller{
+		config:       config,
+		client:       client,
+		sandboxStore: sandboxStore,
+		os:           os,
+		cri:          cri,
+		baseOCISpecs: baseOCISpecs,
+	}
+}
+
+var _ sandbox.Controller = (*Controller)(nil)
+
+func (c *Controller) Stop(ctx context.Context, sandboxID string) (*api.ControllerStopResponse, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (c *Controller) Delete(ctx context.Context, sandboxID string) (*api.ControllerDeleteResponse, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (c *Controller) Wait(ctx context.Context, sandboxID string) (*api.ControllerWaitResponse, error) {
+	panic("implement me")
+}
+
+func (c *Controller) Status(ctx context.Context, sandboxID string) (*api.ControllerStatusResponse, error) {
+	panic("implement me")
+}

pkg/cri/sbserver/podsandbox/controller_test.go

@@ -0,0 +1,52 @@
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	criconfig "github.com/containerd/containerd/pkg/cri/config"
+	"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"
+)
+
+const (
+	testRootDir  = "/test/root"
+	testStateDir = "/test/state"
+	// Use an image id as test sandbox image to avoid image name resolve.
+	// TODO(random-liu): Change this to image name after we have complete image
+	// management unit test framework.
+	testSandboxImage = "sha256:c75bebcdd211f41b3a460c7bf82970ed6c75acaab9cd4c9a4e125b03ca113798"
+)
+
+var testConfig = criconfig.Config{
+	RootDir:  testRootDir,
+	StateDir: testStateDir,
+	PluginConfig: criconfig.PluginConfig{
+		SandboxImage:                     testSandboxImage,
+		TolerateMissingHugetlbController: true,
+	},
+}
+
+// newControllerService creates a fake criService for test.
+func newControllerService() *Controller {
+	labels := label.NewStore()
+	return &Controller{
+		config:       testConfig,
+		os:           ostesting.NewFakeOS(),
+		sandboxStore: sandboxstore.NewStore(labels),
+	}
+}

pkg/cri/sbserver/podsandbox/helpers.go

@@ -0,0 +1,277 @@
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	"context"
+	"fmt"
+	"path"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"github.com/containerd/containerd"
+	"github.com/containerd/containerd/containers"
+	clabels "github.com/containerd/containerd/labels"
+	"github.com/containerd/containerd/log"
+	"github.com/containerd/containerd/oci"
+	criconfig "github.com/containerd/containerd/pkg/cri/config"
+	imagestore "github.com/containerd/containerd/pkg/cri/store/image"
+	ctrdutil "github.com/containerd/containerd/pkg/cri/util"
+	runtimeoptions "github.com/containerd/containerd/pkg/runtimeoptions/v1"
+	"github.com/containerd/containerd/plugin"
+	"github.com/containerd/containerd/reference/docker"
+	"github.com/containerd/containerd/runtime/linux/runctypes"
+	runcoptions "github.com/containerd/containerd/runtime/v2/runc/options"
+	"github.com/containerd/typeurl"
+	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
+	"github.com/sirupsen/logrus"
+
+	runhcsoptions "github.com/Microsoft/hcsshim/cmd/containerd-shim-runhcs-v1/options"
+	imagedigest "github.com/opencontainers/go-digest"
+	"github.com/pelletier/go-toml"
+)
+
+const (
+
+	// sandboxesDir contains all sandbox root. A sandbox root is the running
+	// directory of the sandbox, all files created for the sandbox will be
+	// placed under this directory.
+	sandboxesDir = "sandboxes"
+	// criContainerdPrefix is common prefix for cri-containerd
+	criContainerdPrefix = "io.cri-containerd"
+	// containerKindLabel is a label key indicating container is sandbox container or application container
+	containerKindLabel = criContainerdPrefix + ".kind"
+	// containerKindSandbox is a label value indicating container is sandbox container
+	containerKindSandbox = "sandbox"
+	// sandboxMetadataExtension is an extension name that identify metadata of sandbox in CreateContainerRequest
+	sandboxMetadataExtension = criContainerdPrefix + ".sandbox.metadata"
+	// runtimeRunhcsV1 is the runtime type for runhcs.
+	runtimeRunhcsV1 = "io.containerd.runhcs.v1"
+)
+
+// getSandboxRootDir returns the root directory for managing sandbox files,
+// e.g. hosts files.
+func (c *Controller) getSandboxRootDir(id string) string {
+	return filepath.Join(c.config.RootDir, sandboxesDir, id)
+}
+
+// getVolatileSandboxRootDir returns the root directory for managing volatile sandbox files,
+// e.g. named pipes.
+func (c *Controller) getVolatileSandboxRootDir(id string) string {
+	return filepath.Join(c.config.StateDir, sandboxesDir, id)
+}
+
+// getRepoDigestAngTag returns image repoDigest and repoTag of the named image reference.
+func getRepoDigestAndTag(namedRef docker.Named, digest imagedigest.Digest, schema1 bool) (string, string) {
+	var repoTag, repoDigest string
+	if _, ok := namedRef.(docker.NamedTagged); ok {
+		repoTag = namedRef.String()
+	}
+	if _, ok := namedRef.(docker.Canonical); ok {
+		repoDigest = namedRef.String()
+	} else if !schema1 {
+		// digest is not actual repo digest for schema1 image.
+		repoDigest = namedRef.Name() + "@" + digest.String()
+	}
+	return repoDigest, repoTag
+}
+
+// toContainerdImage converts an image object in image store to containerd image handler.
+func (c *Controller) toContainerdImage(ctx context.Context, image imagestore.Image) (containerd.Image, error) {
+	// image should always have at least one reference.
+	if len(image.References) == 0 {
+		return nil, fmt.Errorf("invalid image with no reference %q", image.ID)
+	}
+	return c.client.GetImage(ctx, image.References[0])
+}
+
+// getUserFromImage gets uid or user name of the image user.
+// If user is numeric, it will be treated as uid; or else, it is treated as user name.
+func getUserFromImage(user string) (*int64, string) {
+	// return both empty if user is not specified in the image.
+	if user == "" {
+		return nil, ""
+	}
+	// split instances where the id may contain user:group
+	user = strings.Split(user, ":")[0]
+	// user could be either uid or user name. Try to interpret as numeric uid.
+	uid, err := strconv.ParseInt(user, 10, 64)
+	if err != nil {
+		// If user is non numeric, assume it's user name.
+		return nil, user
+	}
+	// If user is a numeric uid.
+	return &uid, ""
+}
+
+// buildLabel builds the labels from config to be passed to containerd
+func buildLabels(configLabels, imageConfigLabels map[string]string, containerType string) map[string]string {
+	labels := make(map[string]string)
+
+	for k, v := range imageConfigLabels {
+		if err := clabels.Validate(k, v); err == nil {
+			labels[k] = v
+		} else {
+			// In case the image label is invalid, we output a warning and skip adding it to the
+			// container.
+			logrus.WithError(err).Warnf("unable to add image label with key %s to the container", k)
+		}
+	}
+	// labels from the CRI request (config) will override labels in the image config
+	for k, v := range configLabels {
+		labels[k] = v
+	}
+	labels[containerKindLabel] = containerType
+	return labels
+}
+
+// parseImageReferences parses a list of arbitrary image references and returns
+// the repotags and repodigests
+func parseImageReferences(refs []string) ([]string, []string) {
+	var tags, digests []string
+	for _, ref := range refs {
+		parsed, err := docker.ParseAnyReference(ref)
+		if err != nil {
+			continue
+		}
+		if _, ok := parsed.(docker.Canonical); ok {
+			digests = append(digests, parsed.String())
+		} else if _, ok := parsed.(docker.Tagged); ok {
+			tags = append(tags, parsed.String())
+		}
+	}
+	return tags, digests
+}
+
+// generateRuntimeOptions generates runtime options from cri plugin config.
+func generateRuntimeOptions(r criconfig.Runtime, c criconfig.Config) (interface{}, error) {
+	if r.Options == nil {
+		if r.Type != plugin.RuntimeLinuxV1 {
+			return nil, nil
+		}
+		// This is a legacy config, generate runctypes.RuncOptions.
+		return &runctypes.RuncOptions{
+			Runtime:       r.Engine,
+			RuntimeRoot:   r.Root,
+			SystemdCgroup: c.SystemdCgroup,
+		}, nil
+	}
+	optionsTree, err := toml.TreeFromMap(r.Options)
+	if err != nil {
+		return nil, err
+	}
+	options := getRuntimeOptionsType(r.Type)
+	if err := optionsTree.Unmarshal(options); err != nil {
+		return nil, err
+	}
+	return options, nil
+}
+
+// getRuntimeOptionsType gets empty runtime options by the runtime type name.
+func getRuntimeOptionsType(t string) interface{} {
+	switch t {
+	case plugin.RuntimeRuncV1:
+		fallthrough
+	case plugin.RuntimeRuncV2:
+		return &runcoptions.Options{}
+	case plugin.RuntimeLinuxV1:
+		return &runctypes.RuncOptions{}
+	case runtimeRunhcsV1:
+		return &runhcsoptions.Options{}
+	default:
+		return &runtimeoptions.Options{}
+	}
+}
+
+// getRuntimeOptions get runtime options from container metadata.
+func getRuntimeOptions(c containers.Container) (interface{}, error) {
+	from := c.Runtime.Options
+	if from == nil || from.GetValue() == nil {
+		return nil, nil
+	}
+	opts, err := typeurl.UnmarshalAny(from)
+	if err != nil {
+		return nil, err
+	}
+	return opts, nil
+}
+
+// getPassthroughAnnotations filters requested pod annotations by comparing
+// against permitted annotations for the given runtime.
+func getPassthroughAnnotations(podAnnotations map[string]string,
+	runtimePodAnnotations []string) (passthroughAnnotations map[string]string) {
+	passthroughAnnotations = make(map[string]string)
+
+	for podAnnotationKey, podAnnotationValue := range podAnnotations {
+		for _, pattern := range runtimePodAnnotations {
+			// Use path.Match instead of filepath.Match here.
+			// filepath.Match treated `\\` as path separator
+			// on windows, which is not what we want.
+			if ok, _ := path.Match(pattern, podAnnotationKey); ok {
+				passthroughAnnotations[podAnnotationKey] = podAnnotationValue
+			}
+		}
+	}
+	return passthroughAnnotations
+}
+
+// runtimeSpec returns a default runtime spec used in cri-containerd.
+func (c *Controller) runtimeSpec(id string, baseSpecFile string, opts ...oci.SpecOpts) (*runtimespec.Spec, error) {
+	// GenerateSpec needs namespace.
+	ctx := ctrdutil.NamespacedContext()
+	container := &containers.Container{ID: id}
+
+	if baseSpecFile != "" {
+		baseSpec, ok := c.baseOCISpecs[baseSpecFile]
+		if !ok {
+			return nil, fmt.Errorf("can't find base OCI spec %q", baseSpecFile)
+		}
+
+		spec := oci.Spec{}
+		if err := ctrdutil.DeepCopy(&spec, &baseSpec); err != nil {
+			return nil, fmt.Errorf("failed to clone OCI spec: %w", err)
+		}
+
+		// Fix up cgroups path
+		applyOpts := append([]oci.SpecOpts{oci.WithNamespacedCgroup()}, opts...)
+
+		if err := oci.ApplyOpts(ctx, nil, container, &spec, applyOpts...); err != nil {
+			return nil, fmt.Errorf("failed to apply OCI options: %w", err)
+		}
+
+		return &spec, nil
+	}
+
+	spec, err := oci.GenerateSpec(ctx, nil, container, opts...)
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate spec: %w", err)
+	}
+
+	return spec, nil
+}
+
+// Overrides the default snapshotter if Snapshotter is set for this runtime.
+// See See https://github.com/containerd/containerd/issues/6657
+func (c *Controller) runtimeSnapshotter(ctx context.Context, ociRuntime criconfig.Runtime) string {
+	if ociRuntime.Snapshotter == "" {
+		return c.config.ContainerdConfig.Snapshotter
+	}
+
+	log.G(ctx).Debugf("Set snapshotter for runtime %s to %s", ociRuntime.Type, ociRuntime.Snapshotter)
+	return ociRuntime.Snapshotter
+}

pkg/cri/sbserver/podsandbox/helpers_linux.go

@@ -0,0 +1,255 @@
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path"
+	"path/filepath"
+	"regexp"
+	"sort"
+	"strings"
+	"syscall"
+	"time"
+
+	"github.com/containerd/containerd/log"
+	"github.com/containerd/containerd/mount"
+	"github.com/containerd/containerd/pkg/seccomp"
+	"github.com/containerd/containerd/pkg/seutil"
+	"github.com/moby/sys/mountinfo"
+	"github.com/opencontainers/runtime-spec/specs-go"
+	"github.com/opencontainers/selinux/go-selinux/label"
+	"golang.org/x/sys/unix"
+	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
+)
+
+const (
+	// defaultSandboxOOMAdj is default omm adj for sandbox container. (kubernetes#47938).
+	defaultSandboxOOMAdj = -998
+	// defaultShmSize is the default size of the sandbox shm.
+	defaultShmSize = int64(1024 * 1024 * 64)
+	// relativeRootfsPath is the rootfs path relative to bundle path.
+	relativeRootfsPath = "rootfs"
+	// devShm is the default path of /dev/shm.
+	devShm = "/dev/shm"
+	// etcHosts is the default path of /etc/hosts file.
+	etcHosts = "/etc/hosts"
+	// resolvConfPath is the abs path of resolv.conf on host or container.
+	resolvConfPath = "/etc/resolv.conf"
+)
+
+// getCgroupsPath generates container cgroups path.
+func getCgroupsPath(cgroupsParent, id string) string {
+	base := path.Base(cgroupsParent)
+	if strings.HasSuffix(base, ".slice") {
+		// For a.slice/b.slice/c.slice, base is c.slice.
+		// runc systemd cgroup path format is "slice:prefix:name".
+		return strings.Join([]string{base, "cri-containerd", id}, ":")
+	}
+	return filepath.Join(cgroupsParent, id)
+}
+
+// getSandboxHostname returns the hostname file path inside the sandbox root directory.
+func (c *Controller) getSandboxHostname(id string) string {
+	return filepath.Join(c.getSandboxRootDir(id), "hostname")
+}
+
+// getSandboxHosts returns the hosts file path inside the sandbox root directory.
+func (c *Controller) getSandboxHosts(id string) string {
+	return filepath.Join(c.getSandboxRootDir(id), "hosts")
+}
+
+// getResolvPath returns resolv.conf filepath for specified sandbox.
+func (c *Controller) getResolvPath(id string) string {
+	return filepath.Join(c.getSandboxRootDir(id), "resolv.conf")
+}
+
+// getSandboxDevShm returns the shm file path inside the sandbox root directory.
+func (c *Controller) getSandboxDevShm(id string) string {
+	return filepath.Join(c.getVolatileSandboxRootDir(id), "shm")
+}
+
+func toLabel(selinuxOptions *runtime.SELinuxOption) ([]string, error) {
+	var labels []string
+
+	if selinuxOptions == nil {
+		return nil, nil
+	}
+	if err := checkSelinuxLevel(selinuxOptions.Level); err != nil {
+		return nil, err
+	}
+	if selinuxOptions.User != "" {
+		labels = append(labels, "user:"+selinuxOptions.User)
+	}
+	if selinuxOptions.Role != "" {
+		labels = append(labels, "role:"+selinuxOptions.Role)
+	}
+	if selinuxOptions.Type != "" {
+		labels = append(labels, "type:"+selinuxOptions.Type)
+	}
+	if selinuxOptions.Level != "" {
+		labels = append(labels, "level:"+selinuxOptions.Level)
+	}
+
+	return labels, nil
+}
+
+func initLabelsFromOpt(selinuxOpts *runtime.SELinuxOption) (string, string, error) {
+	labels, err := toLabel(selinuxOpts)
+	if err != nil {
+		return "", "", err
+	}
+	return label.InitLabels(labels)
+}
+
+func checkSelinuxLevel(level string) error {
+	if len(level) == 0 {
+		return nil
+	}
+
+	matched, err := regexp.MatchString(`^s\d(-s\d)??(:c\d{1,4}(\.c\d{1,4})?(,c\d{1,4}(\.c\d{1,4})?)*)?$`, level)
+	if err != nil {
+		return fmt.Errorf("the format of 'level' %q is not correct: %w", level, err)
+	}
+	if !matched {
+		return fmt.Errorf("the format of 'level' %q is not correct", level)
+	}
+	return nil
+}
+
+func (c *Controller) seccompEnabled() bool {
+	return seccomp.IsEnabled()
+}
+
+// unmountRecursive unmounts the target and all mounts underneath, starting with
+// the deepest mount first.
+func unmountRecursive(ctx context.Context, target string) error {
+	toUnmount, err := mountinfo.GetMounts(mountinfo.PrefixFilter(target))
+	if err != nil {
+		return err
+	}
+
+	// Make the deepest mount be first
+	sort.Slice(toUnmount, func(i, j int) bool {
+		return len(toUnmount[i].Mountpoint) > len(toUnmount[j].Mountpoint)
+	})
+
+	for i, m := range toUnmount {
+		if err := mount.UnmountAll(m.Mountpoint, unix.MNT_DETACH); err != nil {
+			if i == len(toUnmount)-1 { // last mount
+				return err
+			}
+			// This is some submount, we can ignore this error for now, the final unmount will fail if this is a real problem
+			log.G(ctx).WithError(err).Debugf("failed to unmount submount %s", m.Mountpoint)
+		}
+	}
+	return nil
+}
+
+// ensureRemoveAll wraps `os.RemoveAll` to check for specific errors that can
+// often be remedied.
+// Only use `ensureRemoveAll` if you really want to make every effort to remove
+// a directory.
+//
+// Because of the way `os.Remove` (and by extension `os.RemoveAll`) works, there
+// can be a race between reading directory entries and then actually attempting
+// to remove everything in the directory.
+// These types of errors do not need to be returned since it's ok for the dir to
+// be gone we can just retry the remove operation.
+//
+// This should not return a `os.ErrNotExist` kind of error under any circumstances
+func ensureRemoveAll(ctx context.Context, dir string) error {
+	notExistErr := make(map[string]bool)
+
+	// track retries
+	exitOnErr := make(map[string]int)
+	maxRetry := 50
+
+	// Attempt to unmount anything beneath this dir first.
+	if err := unmountRecursive(ctx, dir); err != nil {
+		log.G(ctx).WithError(err).Debugf("failed to do initial unmount of %s", dir)
+	}
+
+	for {
+		err := os.RemoveAll(dir)
+		if err == nil {
+			return nil
+		}
+
+		pe, ok := err.(*os.PathError)
+		if !ok {
+			return err
+		}
+
+		if os.IsNotExist(err) {
+			if notExistErr[pe.Path] {
+				return err
+			}
+			notExistErr[pe.Path] = true
+
+			// There is a race where some subdir can be removed but after the
+			// parent dir entries have been read.
+			// So the path could be from `os.Remove(subdir)`
+			// If the reported non-existent path is not the passed in `dir` we
+			// should just retry, but otherwise return with no error.
+			if pe.Path == dir {
+				return nil
+			}
+			continue
+		}
+
+		if pe.Err != syscall.EBUSY {
+			return err
+		}
+		if e := mount.Unmount(pe.Path, unix.MNT_DETACH); e != nil {
+			return fmt.Errorf("error while removing %s: %w", dir, e)
+		}
+
+		if exitOnErr[pe.Path] == maxRetry {
+			return err
+		}
+		exitOnErr[pe.Path]++
+		time.Sleep(100 * time.Millisecond)
+	}
+}
+
+var vmbasedRuntimes = []string{
+	"io.containerd.kata",
+}
+
+func isVMBasedRuntime(runtimeType string) bool {
+	for _, rt := range vmbasedRuntimes {
+		if strings.Contains(runtimeType, rt) {
+			return true
+		}
+	}
+	return false
+}
+
+func modifyProcessLabel(runtimeType string, spec *specs.Spec) error {
+	if !isVMBasedRuntime(runtimeType) {
+		return nil
+	}
+	l, err := seutil.ChangeToKVM(spec.Process.SelinuxLabel)
+	if err != nil {
+		return fmt.Errorf("failed to get selinux kvm label: %w", err)
+	}
+	spec.Process.SelinuxLabel = l
+	return nil
+}

pkg/cri/sbserver/podsandbox/helpers_linux_test.go

@@ -14,7 +14,7 @@
    limitations under the License.
 */
 
-package sbserver
+package podsandbox
 
 import (
 	"context"

pkg/cri/sbserver/podsandbox/helpers_other.go

@@ -0,0 +1,39 @@
+//go:build !windows && !linux
+// +build !windows,!linux
+
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	"context"
+	"os"
+
+	"github.com/opencontainers/runtime-spec/specs-go"
+)
+
+// ensureRemoveAll wraps `os.RemoveAll` to check for specific errors that can
+// often be remedied.
+// Only use `ensureRemoveAll` if you really want to make every effort to remove
+// a directory.
+func ensureRemoveAll(ctx context.Context, dir string) error {
+	return os.RemoveAll(dir)
+}
+
+func modifyProcessLabel(runtimeType string, spec *specs.Spec) error {
+	return nil
+}

pkg/cri/sbserver/podsandbox/helpers_selinux_linux_test.go

@@ -14,7 +14,7 @@
    limitations under the License.
 */
 
-package sbserver
+package podsandbox
 
 import (
 	"testing"

pkg/cri/sbserver/podsandbox/helpers_test.go

@@ -0,0 +1,483 @@
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	"context"
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/containerd/containerd/containers"
+	"github.com/containerd/containerd/oci"
+	criconfig "github.com/containerd/containerd/pkg/cri/config"
+	"github.com/containerd/containerd/plugin"
+	"github.com/containerd/containerd/protobuf/types"
+	"github.com/containerd/containerd/reference/docker"
+	"github.com/containerd/containerd/runtime/linux/runctypes"
+	runcoptions "github.com/containerd/containerd/runtime/v2/runc/options"
+	"github.com/containerd/typeurl"
+
+	imagedigest "github.com/opencontainers/go-digest"
+	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
+	"github.com/pelletier/go-toml"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// TestGetUserFromImage tests the logic of getting image uid or user name of image user.
+func TestGetUserFromImage(t *testing.T) {
+	newI64 := func(i int64) *int64 { return &i }
+	for c, test := range map[string]struct {
+		user string
+		uid  *int64
+		name string
+	}{
+		"no gid": {
+			user: "0",
+			uid:  newI64(0),
+		},
+		"uid/gid": {
+			user: "0:1",
+			uid:  newI64(0),
+		},
+		"empty user": {
+			user: "",
+		},
+		"multiple separators": {
+			user: "1:2:3",
+			uid:  newI64(1),
+		},
+		"root username": {
+			user: "root:root",
+			name: "root",
+		},
+		"username": {
+			user: "test:test",
+			name: "test",
+		},
+	} {
+		t.Run(c, func(t *testing.T) {
+			actualUID, actualName := getUserFromImage(test.user)
+			assert.Equal(t, test.uid, actualUID)
+			assert.Equal(t, test.name, actualName)
+		})
+	}
+}
+
+func TestGetRepoDigestAndTag(t *testing.T) {
+	digest := imagedigest.Digest("sha256:e6693c20186f837fc393390135d8a598a96a833917917789d63766cab6c59582")
+	for desc, test := range map[string]struct {
+		ref                string
+		schema1            bool
+		expectedRepoDigest string
+		expectedRepoTag    string
+	}{
+		"repo tag should be empty if original ref has no tag": {
+			ref:                "gcr.io/library/busybox@" + digest.String(),
+			expectedRepoDigest: "gcr.io/library/busybox@" + digest.String(),
+		},
+		"repo tag should not be empty if original ref has tag": {
+			ref:                "gcr.io/library/busybox:latest",
+			expectedRepoDigest: "gcr.io/library/busybox@" + digest.String(),
+			expectedRepoTag:    "gcr.io/library/busybox:latest",
+		},
+		"repo digest should be empty if original ref is schema1 and has no digest": {
+			ref:                "gcr.io/library/busybox:latest",
+			schema1:            true,
+			expectedRepoDigest: "",
+			expectedRepoTag:    "gcr.io/library/busybox:latest",
+		},
+		"repo digest should not be empty if original ref is schema1 but has digest": {
+			ref:                "gcr.io/library/busybox@sha256:e6693c20186f837fc393390135d8a598a96a833917917789d63766cab6c59594",
+			schema1:            true,
+			expectedRepoDigest: "gcr.io/library/busybox@sha256:e6693c20186f837fc393390135d8a598a96a833917917789d63766cab6c59594",
+			expectedRepoTag:    "",
+		},
+	} {
+		t.Run(desc, func(t *testing.T) {
+			named, err := docker.ParseDockerRef(test.ref)
+			assert.NoError(t, err)
+			repoDigest, repoTag := getRepoDigestAndTag(named, digest, test.schema1)
+			assert.Equal(t, test.expectedRepoDigest, repoDigest)
+			assert.Equal(t, test.expectedRepoTag, repoTag)
+		})
+	}
+}
+
+func TestBuildLabels(t *testing.T) {
+	imageConfigLabels := map[string]string{
+		"a":          "z",
+		"d":          "y",
+		"long-label": strings.Repeat("example", 10000),
+	}
+	configLabels := map[string]string{
+		"a": "b",
+		"c": "d",
+	}
+	newLabels := buildLabels(configLabels, imageConfigLabels, containerKindSandbox)
+	assert.Len(t, newLabels, 4)
+	assert.Equal(t, "b", newLabels["a"])
+	assert.Equal(t, "d", newLabels["c"])
+	assert.Equal(t, "y", newLabels["d"])
+	assert.Equal(t, containerKindSandbox, newLabels[containerKindLabel])
+	assert.NotContains(t, newLabels, "long-label")
+
+	newLabels["a"] = "e"
+	assert.Empty(t, configLabels[containerKindLabel], "should not add new labels into original label")
+	assert.Equal(t, "b", configLabels["a"], "change in new labels should not affect original label")
+}
+
+func TestParseImageReferences(t *testing.T) {
+	refs := []string{
+		"gcr.io/library/busybox@sha256:e6693c20186f837fc393390135d8a598a96a833917917789d63766cab6c59582",
+		"gcr.io/library/busybox:1.2",
+		"sha256:e6693c20186f837fc393390135d8a598a96a833917917789d63766cab6c59582",
+		"arbitrary-ref",
+	}
+	expectedTags := []string{
+		"gcr.io/library/busybox:1.2",
+	}
+	expectedDigests := []string{"gcr.io/library/busybox@sha256:e6693c20186f837fc393390135d8a598a96a833917917789d63766cab6c59582"}
+	tags, digests := parseImageReferences(refs)
+	assert.Equal(t, expectedTags, tags)
+	assert.Equal(t, expectedDigests, digests)
+}
+
+func TestGenerateRuntimeOptions(t *testing.T) {
+	nilOpts := `
+systemd_cgroup = true
+[containerd]
+  no_pivot = true
+  default_runtime_name = "default"
+[containerd.runtimes.legacy]
+  runtime_type = "` + plugin.RuntimeLinuxV1 + `"
+[containerd.runtimes.runc]
+  runtime_type = "` + plugin.RuntimeRuncV1 + `"
+[containerd.runtimes.runcv2]
+  runtime_type = "` + plugin.RuntimeRuncV2 + `"
+`
+	nonNilOpts := `
+systemd_cgroup = true
+[containerd]
+  no_pivot = true
+  default_runtime_name = "default"
+[containerd.runtimes.legacy]
+  runtime_type = "` + plugin.RuntimeLinuxV1 + `"
+[containerd.runtimes.legacy.options]
+  Runtime = "legacy"
+  RuntimeRoot = "/legacy"
+[containerd.runtimes.runc]
+  runtime_type = "` + plugin.RuntimeRuncV1 + `"
+[containerd.runtimes.runc.options]
+  BinaryName = "runc"
+  Root = "/runc"
+  NoNewKeyring = true
+[containerd.runtimes.runcv2]
+  runtime_type = "` + plugin.RuntimeRuncV2 + `"
+[containerd.runtimes.runcv2.options]
+  BinaryName = "runc"
+  Root = "/runcv2"
+  NoNewKeyring = true
+`
+	var nilOptsConfig, nonNilOptsConfig criconfig.Config
+	tree, err := toml.Load(nilOpts)
+	require.NoError(t, err)
+	err = tree.Unmarshal(&nilOptsConfig)
+	require.NoError(t, err)
+	require.Len(t, nilOptsConfig.Runtimes, 3)
+
+	tree, err = toml.Load(nonNilOpts)
+	require.NoError(t, err)
+	err = tree.Unmarshal(&nonNilOptsConfig)
+	require.NoError(t, err)
+	require.Len(t, nonNilOptsConfig.Runtimes, 3)
+
+	for desc, test := range map[string]struct {
+		r               criconfig.Runtime
+		c               criconfig.Config
+		expectedOptions interface{}
+	}{
+		"when options is nil, should return nil option for io.containerd.runc.v1": {
+			r:               nilOptsConfig.Runtimes["runc"],
+			c:               nilOptsConfig,
+			expectedOptions: nil,
+		},
+		"when options is nil, should return nil option for io.containerd.runc.v2": {
+			r:               nilOptsConfig.Runtimes["runcv2"],
+			c:               nilOptsConfig,
+			expectedOptions: nil,
+		},
+		"when options is nil, should use legacy fields for legacy runtime": {
+			r: nilOptsConfig.Runtimes["legacy"],
+			c: nilOptsConfig,
+			expectedOptions: &runctypes.RuncOptions{
+				SystemdCgroup: true,
+			},
+		},
+		"when options is not nil, should be able to decode for io.containerd.runc.v1": {
+			r: nonNilOptsConfig.Runtimes["runc"],
+			c: nonNilOptsConfig,
+			expectedOptions: &runcoptions.Options{
+				BinaryName:   "runc",
+				Root:         "/runc",
+				NoNewKeyring: true,
+			},
+		},
+		"when options is not nil, should be able to decode for io.containerd.runc.v2": {
+			r: nonNilOptsConfig.Runtimes["runcv2"],
+			c: nonNilOptsConfig,
+			expectedOptions: &runcoptions.Options{
+				BinaryName:   "runc",
+				Root:         "/runcv2",
+				NoNewKeyring: true,
+			},
+		},
+		"when options is not nil, should be able to decode for legacy runtime": {
+			r: nonNilOptsConfig.Runtimes["legacy"],
+			c: nonNilOptsConfig,
+			expectedOptions: &runctypes.RuncOptions{
+				Runtime:     "legacy",
+				RuntimeRoot: "/legacy",
+			},
+		},
+	} {
+		t.Run(desc, func(t *testing.T) {
+			opts, err := generateRuntimeOptions(test.r, test.c)
+			assert.NoError(t, err)
+			assert.Equal(t, test.expectedOptions, opts)
+		})
+	}
+}
+
+func TestEnvDeduplication(t *testing.T) {
+	for desc, test := range map[string]struct {
+		existing []string
+		kv       [][2]string
+		expected []string
+	}{
+		"single env": {
+			kv: [][2]string{
+				{"a", "b"},
+			},
+			expected: []string{"a=b"},
+		},
+		"multiple envs": {
+			kv: [][2]string{
+				{"a", "b"},
+				{"c", "d"},
+				{"e", "f"},
+			},
+			expected: []string{
+				"a=b",
+				"c=d",
+				"e=f",
+			},
+		},
+		"env override": {
+			kv: [][2]string{
+				{"k1", "v1"},
+				{"k2", "v2"},
+				{"k3", "v3"},
+				{"k3", "v4"},
+				{"k1", "v5"},
+				{"k4", "v6"},
+			},
+			expected: []string{
+				"k1=v5",
+				"k2=v2",
+				"k3=v4",
+				"k4=v6",
+			},
+		},
+		"existing env": {
+			existing: []string{
+				"k1=v1",
+				"k2=v2",
+				"k3=v3",
+			},
+			kv: [][2]string{
+				{"k3", "v4"},
+				{"k2", "v5"},
+				{"k4", "v6"},
+			},
+			expected: []string{
+				"k1=v1",
+				"k2=v5",
+				"k3=v4",
+				"k4=v6",
+			},
+		},
+	} {
+		t.Run(desc, func(t *testing.T) {
+			var spec runtimespec.Spec
+			if len(test.existing) > 0 {
+				spec.Process = &runtimespec.Process{
+					Env: test.existing,
+				}
+			}
+			for _, kv := range test.kv {
+				oci.WithEnv([]string{kv[0] + "=" + kv[1]})(context.Background(), nil, nil, &spec)
+			}
+			assert.Equal(t, test.expected, spec.Process.Env)
+		})
+	}
+}
+
+func TestPassThroughAnnotationsFilter(t *testing.T) {
+	for desc, test := range map[string]struct {
+		podAnnotations         map[string]string
+		runtimePodAnnotations  []string
+		passthroughAnnotations map[string]string
+	}{
+		"should support direct match": {
+			podAnnotations:         map[string]string{"c": "d", "d": "e"},
+			runtimePodAnnotations:  []string{"c"},
+			passthroughAnnotations: map[string]string{"c": "d"},
+		},
+		"should support wildcard match": {
+			podAnnotations: map[string]string{
+				"t.f":  "j",
+				"z.g":  "o",
+				"z":    "o",
+				"y.ca": "b",
+				"y":    "b",
+			},
+			runtimePodAnnotations: []string{"*.f", "z*g", "y.c*"},
+			passthroughAnnotations: map[string]string{
+				"t.f":  "j",
+				"z.g":  "o",
+				"y.ca": "b",
+			},
+		},
+		"should support wildcard match all": {
+			podAnnotations: map[string]string{
+				"t.f":  "j",
+				"z.g":  "o",
+				"z":    "o",
+				"y.ca": "b",
+				"y":    "b",
+			},
+			runtimePodAnnotations: []string{"*"},
+			passthroughAnnotations: map[string]string{
+				"t.f":  "j",
+				"z.g":  "o",
+				"z":    "o",
+				"y.ca": "b",
+				"y":    "b",
+			},
+		},
+		"should support match including path separator": {
+			podAnnotations: map[string]string{
+				"matchend.com/end":    "1",
+				"matchend.com/end1":   "2",
+				"matchend.com/1end":   "3",
+				"matchmid.com/mid":    "4",
+				"matchmid.com/mi1d":   "5",
+				"matchmid.com/mid1":   "6",
+				"matchhead.com/head":  "7",
+				"matchhead.com/1head": "8",
+				"matchhead.com/head1": "9",
+				"matchall.com/abc":    "10",
+				"matchall.com/def":    "11",
+				"end/matchend":        "12",
+				"end1/matchend":       "13",
+				"1end/matchend":       "14",
+				"mid/matchmid":        "15",
+				"mi1d/matchmid":       "16",
+				"mid1/matchmid":       "17",
+				"head/matchhead":      "18",
+				"1head/matchhead":     "19",
+				"head1/matchhead":     "20",
+				"abc/matchall":        "21",
+				"def/matchall":        "22",
+				"match1/match2":       "23",
+				"nomatch/nomatch":     "24",
+			},
+			runtimePodAnnotations: []string{
+				"matchend.com/end*",
+				"matchmid.com/mi*d",
+				"matchhead.com/*head",
+				"matchall.com/*",
+				"end*/matchend",
+				"mi*d/matchmid",
+				"*head/matchhead",
+				"*/matchall",
+				"match*/match*",
+			},
+			passthroughAnnotations: map[string]string{
+				"matchend.com/end":    "1",
+				"matchend.com/end1":   "2",
+				"matchmid.com/mid":    "4",
+				"matchmid.com/mi1d":   "5",
+				"matchhead.com/head":  "7",
+				"matchhead.com/1head": "8",
+				"matchall.com/abc":    "10",
+				"matchall.com/def":    "11",
+				"end/matchend":        "12",
+				"end1/matchend":       "13",
+				"mid/matchmid":        "15",
+				"mi1d/matchmid":       "16",
+				"head/matchhead":      "18",
+				"1head/matchhead":     "19",
+				"abc/matchall":        "21",
+				"def/matchall":        "22",
+				"match1/match2":       "23",
+			},
+		},
+	} {
+		t.Run(desc, func(t *testing.T) {
+			passthroughAnnotations := getPassthroughAnnotations(test.podAnnotations, test.runtimePodAnnotations)
+			assert.Equal(t, test.passthroughAnnotations, passthroughAnnotations)
+		})
+	}
+}
+
+func TestEnsureRemoveAllNotExist(t *testing.T) {
+	// should never return an error for a non-existent path
+	if err := ensureRemoveAll(context.Background(), "/non/existent/path"); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestEnsureRemoveAllWithDir(t *testing.T) {
+	dir := t.TempDir()
+	if err := ensureRemoveAll(context.Background(), dir); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestEnsureRemoveAllWithFile(t *testing.T) {
+	tmp, err := os.CreateTemp("", "test-ensure-removeall-with-dir")
+	if err != nil {
+		t.Fatal(err)
+	}
+	tmp.Close()
+	if err := ensureRemoveAll(context.Background(), tmp.Name()); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestGetRuntimeOptions(t *testing.T) {
+	_, err := getRuntimeOptions(containers.Container{})
+	require.NoError(t, err)
+
+	var pbany *types.Any               // This is nil.
+	var typeurlAny typeurl.Any = pbany // This is typed nil.
+	_, err = getRuntimeOptions(containers.Container{Runtime: containers.RuntimeInfo{Options: typeurlAny}})
+	require.NoError(t, err)
+}

pkg/cri/sbserver/podsandbox/helpers_windows.go

@@ -0,0 +1,33 @@
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	"context"
+	"os"
+
+	"github.com/opencontainers/runtime-spec/specs-go"
+)
+
+// ensureRemoveAll is a wrapper for os.RemoveAll on Windows.
+func ensureRemoveAll(_ context.Context, dir string) error {
+	return os.RemoveAll(dir)
+}
+
+func modifyProcessLabel(runtimeType string, spec *specs.Spec) error {
+	return nil
+}

pkg/cri/sbserver/podsandbox/opts.go

@@ -0,0 +1,51 @@
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	"context"
+
+	"github.com/containerd/containerd"
+	"github.com/containerd/containerd/log"
+	"github.com/containerd/nri"
+	v1 "github.com/containerd/nri/types/v1"
+)
+
+// WithNRISandboxDelete calls delete for a sandbox'd task
+func WithNRISandboxDelete(sandboxID string) containerd.ProcessDeleteOpts {
+	return func(ctx context.Context, p containerd.Process) error {
+		task, ok := p.(containerd.Task)
+		if !ok {
+			return nil
+		}
+		nric, err := nri.New()
+		if err != nil {
+			log.G(ctx).WithError(err).Error("unable to create nri client")
+			return nil
+		}
+		if nric == nil {
+			return nil
+		}
+		sb := &nri.Sandbox{
+			ID: sandboxID,
+		}
+		if _, err := nric.InvokeWithSandbox(ctx, task, v1.Delete, sb); err != nil {
+			log.G(ctx).WithError(err).Errorf("Failed to delete nri for %q", task.ID())
+		}
+		return nil
+	}
+}

pkg/cri/sbserver/podsandbox/sandbox_run.go

@@ -0,0 +1,315 @@
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"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"
+	"github.com/containerd/containerd/pkg/cri/annotations"
+	criconfig "github.com/containerd/containerd/pkg/cri/config"
+	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/snapshots"
+	"github.com/containerd/nri"
+	v1 "github.com/containerd/nri/types/v1"
+	"github.com/containerd/typeurl"
+	"github.com/davecgh/go-spew/spew"
+	"github.com/opencontainers/selinux/go-selinux"
+	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
+)
+
+func init() {
+	typeurl.Register(&sandboxstore.Metadata{},
+		"github.com/containerd/cri/pkg/store/sandbox", "Metadata")
+}
+
+func (c *Controller) Start(ctx context.Context, id string) (_ *api.ControllerStartResponse, retErr error) {
+	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)
+	}
+
+	var metadata sandboxstore.Metadata
+	if err := sandboxInfo.GetExtension("metadata", &metadata); err != nil {
+		return nil, fmt.Errorf("failed to get sandbox %q metadata: %w", id, err)
+	}
+
+	var (
+		config = metadata.Config
+		labels = map[string]string{}
+	)
+
+	// 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)
+	}
+
+	containerdImage, err := c.toContainerdImage(ctx, *image)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get image from containerd %q: %w", image.ID, err)
+	}
+
+	ociRuntime, err := c.getSandboxRuntime(config, sandboxInfo.Runtime.Name)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get sandbox runtime: %w", err)
+	}
+	log.G(ctx).WithField("podsandboxid", id).Debugf("use OCI runtime %+v", ociRuntime)
+
+	labels["oci_runtime_type"] = ociRuntime.Type
+
+	// Create sandbox container.
+	// NOTE: sandboxContainerSpec SHOULD NOT have side
+	// effect, e.g. accessing/creating files, so that we can test
+	// 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)
+	}
+	log.G(ctx).WithField("podsandboxid", id).Debugf("sandbox container spec: %#+v", spew.NewFormatter(spec))
+
+	metadata.ProcessLabel = spec.Process.SelinuxLabel
+	defer func() {
+		if retErr != nil {
+			selinux.ReleaseLabel(metadata.ProcessLabel)
+		}
+	}()
+	labels["selinux_label"] = metadata.ProcessLabel
+
+	// handle any KVM based runtime
+	if err := modifyProcessLabel(ociRuntime.Type, spec); err != nil {
+		return nil, err
+	}
+
+	if config.GetLinux().GetSecurityContext().GetPrivileged() {
+		// If privileged don't set selinux label, but we still record the MCS label so that
+		// the unused label can be freed later.
+		spec.Process.SelinuxLabel = ""
+	}
+
+	// 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)
+	}
+
+	sandboxLabels := buildLabels(config.Labels, image.ImageSpec.Config.Labels, containerKindSandbox)
+
+	runtimeOpts, err := generateRuntimeOptions(ociRuntime, c.config)
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate runtime options: %w", err)
+	}
+
+	snapshotterOpt := snapshots.WithLabels(snapshots.FilterInheritedLabels(config.Annotations))
+	opts := []containerd.NewContainerOpts{
+		containerd.WithSnapshotter(c.runtimeSnapshotter(ctx, ociRuntime)),
+		customopts.WithNewSnapshot(id, containerdImage, snapshotterOpt),
+		containerd.WithSpec(spec, specOpts...),
+		containerd.WithContainerLabels(sandboxLabels),
+		containerd.WithContainerExtension(sandboxMetadataExtension, &metadata),
+		containerd.WithRuntime(ociRuntime.Type, runtimeOpts)}
+
+	container, err := c.client.NewContainer(ctx, id, opts...)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create containerd container: %w", err)
+	}
+	defer func() {
+		if retErr != nil {
+			deferCtx, deferCancel := ctrdutil.DeferContext()
+			defer deferCancel()
+			if err := container.Delete(deferCtx, containerd.WithSnapshotCleanup); err != nil {
+				log.G(ctx).WithError(err).Errorf("Failed to delete containerd container %q", id)
+			}
+		}
+	}()
+
+	// 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",
+			sandboxRootDir, err)
+	}
+	defer func() {
+		if retErr != nil {
+			// Cleanup the sandbox root directory.
+			if err := c.os.RemoveAll(sandboxRootDir); err != nil {
+				log.G(ctx).WithError(err).Errorf("Failed to remove sandbox root directory %q",
+					sandboxRootDir)
+			}
+		}
+	}()
+
+	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",
+			volatileSandboxRootDir, err)
+	}
+	defer func() {
+		if retErr != nil {
+			// Cleanup the volatile sandbox root directory.
+			if err := c.os.RemoveAll(volatileSandboxRootDir); err != nil {
+				log.G(ctx).WithError(err).Errorf("Failed to remove volatile sandbox root directory %q",
+					volatileSandboxRootDir)
+			}
+		}
+	}()
+
+	// 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)
+	}
+	defer func() {
+		if retErr != nil {
+			if err = c.cleanupSandboxFiles(id, config); err != nil {
+				log.G(ctx).WithError(err).Errorf("Failed to cleanup sandbox files in %q",
+					sandboxRootDir)
+			}
+		}
+	}()
+
+	// Update sandbox created timestamp.
+	info, err := container.Info(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get sandbox container info: %w", err)
+	}
+
+	// Create sandbox task in containerd.
+	log.G(ctx).Tracef("Create sandbox container (id=%q, name=%q).", id, metadata.Name)
+
+	taskOpts := c.taskOpts(ociRuntime.Type)
+	if ociRuntime.Path != "" {
+		taskOpts = append(taskOpts, containerd.WithRuntimePath(ociRuntime.Path))
+	}
+
+	// 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)
+	}
+	defer func() {
+		if retErr != nil {
+			deferCtx, deferCancel := ctrdutil.DeferContext()
+			defer deferCancel()
+			// Cleanup the sandbox container if an error is returned.
+			if _, err := task.Delete(deferCtx, WithNRISandboxDelete(id), containerd.WithProcessKill); err != nil && !errdefs.IsNotFound(err) {
+				log.G(ctx).WithError(err).Errorf("Failed to delete sandbox container %q", id)
+			}
+		}
+	}()
+
+	// 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)
+	}
+
+	nric, err := nri.New()
+	if err != nil {
+		return nil, fmt.Errorf("unable to create nri client: %w", err)
+	}
+	if nric != nil {
+		nriSB := &nri.Sandbox{
+			ID:     id,
+			Labels: config.Labels,
+		}
+		if _, err := nric.InvokeWithSandbox(ctx, task, v1.Create, nriSB); err != nil {
+			return nil, 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)
+	}
+
+	// start the monitor after adding sandbox into the store, this ensures
+	// that sandbox is in the store, when event monitor receives the TaskExit event.
+	//
+	// 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.cri.StartSandboxExitMonitor(context.Background(), id, task.Pid(), exitCh) // TODO: Move back to CRI service.
+
+	resp := &api.ControllerStartResponse{
+		SandboxID: id,
+		Pid:       task.Pid(),
+		CreatedAt: protobuf.ToTimestamp(info.CreatedAt),
+	}
+
+	return resp, nil
+}
+
+// untrustedWorkload returns true if the sandbox contains untrusted workload.
+func untrustedWorkload(config *runtime.PodSandboxConfig) bool {
+	return config.GetAnnotations()[annotations.UntrustedWorkload] == "true"
+}
+
+// hostAccessingSandbox returns true if the sandbox configuration
+// requires additional host access for the sandbox.
+func hostAccessingSandbox(config *runtime.PodSandboxConfig) bool {
+	securityContext := config.GetLinux().GetSecurityContext()
+
+	namespaceOptions := securityContext.GetNamespaceOptions()
+	if namespaceOptions.GetNetwork() == runtime.NamespaceMode_NODE ||
+		namespaceOptions.GetPid() == runtime.NamespaceMode_NODE ||
+		namespaceOptions.GetIpc() == runtime.NamespaceMode_NODE {
+		return true
+	}
+
+	return false
+}
+
+// getSandboxRuntime returns the runtime configuration for sandbox.
+// If the sandbox contains untrusted workload, runtime for untrusted workload will be returned,
+// or else default runtime will be returned.
+func (c *Controller) getSandboxRuntime(config *runtime.PodSandboxConfig, runtimeHandler string) (criconfig.Runtime, error) {
+	if untrustedWorkload(config) {
+		// If the untrusted annotation is provided, runtimeHandler MUST be empty.
+		if runtimeHandler != "" && runtimeHandler != criconfig.RuntimeUntrusted {
+			return criconfig.Runtime{}, errors.New("untrusted workload with explicit runtime handler is not allowed")
+		}
+
+		//  If the untrusted workload is requesting access to the host/node, this request will fail.
+		//
+		//  Note: If the workload is marked untrusted but requests privileged, this can be granted, as the
+		// runtime may support this.  For example, in a virtual-machine isolated runtime, privileged
+		// is a supported option, granting the workload to access the entire guest VM instead of host.
+		// TODO(windows): Deprecate this so that we don't need to handle it for windows.
+		if hostAccessingSandbox(config) {
+			return criconfig.Runtime{}, errors.New("untrusted workload with host access is not allowed")
+		}
+
+		runtimeHandler = criconfig.RuntimeUntrusted
+	}
+
+	if runtimeHandler == "" {
+		runtimeHandler = c.config.ContainerdConfig.DefaultRuntimeName
+	}
+
+	handler, ok := c.config.ContainerdConfig.Runtimes[runtimeHandler]
+	if !ok {
+		return criconfig.Runtime{}, fmt.Errorf("no runtime for %q is configured", runtimeHandler)
+	}
+	return handler, nil
+}

pkg/cri/sbserver/podsandbox/sandbox_run_linux.go

@@ -0,0 +1,350 @@
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+
+	"github.com/containerd/containerd"
+	"github.com/containerd/containerd/oci"
+	"github.com/containerd/containerd/plugin"
+	imagespec "github.com/opencontainers/image-spec/specs-go/v1"
+	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
+	"github.com/opencontainers/selinux/go-selinux"
+	"golang.org/x/sys/unix"
+	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
+
+	"github.com/containerd/containerd/pkg/cri/annotations"
+	customopts "github.com/containerd/containerd/pkg/cri/opts"
+	osinterface "github.com/containerd/containerd/pkg/os"
+	"github.com/containerd/containerd/pkg/userns"
+)
+
+func (c *Controller) sandboxContainerSpec(id string, config *runtime.PodSandboxConfig,
+	imageConfig *imagespec.ImageConfig, nsPath string, runtimePodAnnotations []string) (_ *runtimespec.Spec, retErr error) {
+	// Creates a spec Generator with the default spec.
+	// TODO(random-liu): [P1] Compare the default settings with docker and containerd default.
+	specOpts := []oci.SpecOpts{
+		oci.WithoutRunMount,
+		customopts.WithoutDefaultSecuritySettings,
+		customopts.WithRelativeRoot(relativeRootfsPath),
+		oci.WithEnv(imageConfig.Env),
+		oci.WithRootFSReadonly(),
+		oci.WithHostname(config.GetHostname()),
+	}
+	if imageConfig.WorkingDir != "" {
+		specOpts = append(specOpts, oci.WithProcessCwd(imageConfig.WorkingDir))
+	}
+
+	if len(imageConfig.Entrypoint) == 0 && len(imageConfig.Cmd) == 0 {
+		// Pause image must have entrypoint or cmd.
+		return nil, fmt.Errorf("invalid empty entrypoint and cmd in image config %+v", imageConfig)
+	}
+	specOpts = append(specOpts, oci.WithProcessArgs(append(imageConfig.Entrypoint, imageConfig.Cmd...)...))
+
+	// Set cgroups parent.
+	if c.config.DisableCgroup {
+		specOpts = append(specOpts, customopts.WithDisabledCgroups)
+	} else {
+		if config.GetLinux().GetCgroupParent() != "" {
+			cgroupsPath := getCgroupsPath(config.GetLinux().GetCgroupParent(), id)
+			specOpts = append(specOpts, oci.WithCgroup(cgroupsPath))
+		}
+	}
+
+	// When cgroup parent is not set, containerd-shim will create container in a child cgroup
+	// of the cgroup itself is in.
+	// TODO(random-liu): [P2] Set default cgroup path if cgroup parent is not specified.
+
+	// Set namespace options.
+	var (
+		securityContext = config.GetLinux().GetSecurityContext()
+		nsOptions       = securityContext.GetNamespaceOptions()
+	)
+	if nsOptions.GetNetwork() == runtime.NamespaceMode_NODE {
+		specOpts = append(specOpts, customopts.WithoutNamespace(runtimespec.NetworkNamespace))
+		specOpts = append(specOpts, customopts.WithoutNamespace(runtimespec.UTSNamespace))
+	} else {
+		specOpts = append(specOpts, oci.WithLinuxNamespace(
+			runtimespec.LinuxNamespace{
+				Type: runtimespec.NetworkNamespace,
+				Path: nsPath,
+			}))
+	}
+	if nsOptions.GetPid() == runtime.NamespaceMode_NODE {
+		specOpts = append(specOpts, customopts.WithoutNamespace(runtimespec.PIDNamespace))
+	}
+	if nsOptions.GetIpc() == runtime.NamespaceMode_NODE {
+		specOpts = append(specOpts, customopts.WithoutNamespace(runtimespec.IPCNamespace))
+	}
+
+	// It's fine to generate the spec before the sandbox /dev/shm
+	// is actually created.
+	sandboxDevShm := c.getSandboxDevShm(id)
+	if nsOptions.GetIpc() == runtime.NamespaceMode_NODE {
+		sandboxDevShm = devShm
+	}
+	// Remove the default /dev/shm mount from defaultMounts, it is added in oci/mounts.go.
+	specOpts = append(specOpts, oci.WithoutMounts(devShm))
+	// In future the when user-namespace is enabled, the `nosuid, nodev, noexec` flags are
+	// required, otherwise the remount will fail with EPERM. Just use them unconditionally,
+	// they are nice to have anyways.
+	specOpts = append(specOpts, oci.WithMounts([]runtimespec.Mount{
+		{
+			Source:      sandboxDevShm,
+			Destination: devShm,
+			Type:        "bind",
+			Options:     []string{"rbind", "ro", "nosuid", "nodev", "noexec"},
+		},
+		// Add resolv.conf for katacontainers to setup the DNS of pod VM properly.
+		{
+			Source:      c.getResolvPath(id),
+			Destination: resolvConfPath,
+			Type:        "bind",
+			Options:     []string{"rbind", "ro"},
+		},
+	}))
+
+	processLabel, mountLabel, err := initLabelsFromOpt(securityContext.GetSelinuxOptions())
+	if err != nil {
+		return nil, fmt.Errorf("failed to init selinux options %+v: %w", securityContext.GetSelinuxOptions(), err)
+	}
+	defer func() {
+		if retErr != nil {
+			selinux.ReleaseLabel(processLabel)
+		}
+	}()
+
+	supplementalGroups := securityContext.GetSupplementalGroups()
+	specOpts = append(specOpts,
+		customopts.WithSelinuxLabels(processLabel, mountLabel),
+		customopts.WithSupplementalGroups(supplementalGroups),
+	)
+
+	// Add sysctls
+	sysctls := config.GetLinux().GetSysctls()
+	if sysctls == nil {
+		sysctls = make(map[string]string)
+	}
+	_, ipUnprivilegedPortStart := sysctls["net.ipv4.ip_unprivileged_port_start"]
+	_, pingGroupRange := sysctls["net.ipv4.ping_group_range"]
+	if nsOptions.GetNetwork() != runtime.NamespaceMode_NODE {
+		if c.config.EnableUnprivilegedPorts && !ipUnprivilegedPortStart {
+			sysctls["net.ipv4.ip_unprivileged_port_start"] = "0"
+		}
+		if c.config.EnableUnprivilegedICMP && !pingGroupRange && !userns.RunningInUserNS() {
+			sysctls["net.ipv4.ping_group_range"] = "0 2147483647"
+		}
+	}
+	specOpts = append(specOpts, customopts.WithSysctls(sysctls))
+
+	// Note: LinuxSandboxSecurityContext does not currently provide an apparmor profile
+
+	if !c.config.DisableCgroup {
+		specOpts = append(specOpts, customopts.WithDefaultSandboxShares)
+	}
+
+	if res := config.GetLinux().GetResources(); res != nil {
+		specOpts = append(specOpts,
+			customopts.WithAnnotation(annotations.SandboxCPUPeriod, strconv.FormatInt(res.CpuPeriod, 10)),
+			customopts.WithAnnotation(annotations.SandboxCPUQuota, strconv.FormatInt(res.CpuQuota, 10)),
+			customopts.WithAnnotation(annotations.SandboxCPUShares, strconv.FormatInt(res.CpuShares, 10)),
+			customopts.WithAnnotation(annotations.SandboxMem, strconv.FormatInt(res.MemoryLimitInBytes, 10)))
+	}
+
+	specOpts = append(specOpts, customopts.WithPodOOMScoreAdj(int(defaultSandboxOOMAdj), c.config.RestrictOOMScoreAdj))
+
+	for pKey, pValue := range getPassthroughAnnotations(config.Annotations,
+		runtimePodAnnotations) {
+		specOpts = append(specOpts, customopts.WithAnnotation(pKey, pValue))
+	}
+
+	specOpts = append(specOpts,
+		customopts.WithAnnotation(annotations.ContainerType, annotations.ContainerTypeSandbox),
+		customopts.WithAnnotation(annotations.SandboxID, id),
+		customopts.WithAnnotation(annotations.SandboxNamespace, config.GetMetadata().GetNamespace()),
+		customopts.WithAnnotation(annotations.SandboxName, config.GetMetadata().GetName()),
+		customopts.WithAnnotation(annotations.SandboxLogDir, config.GetLogDirectory()),
+	)
+
+	return c.runtimeSpec(id, "", specOpts...)
+}
+
+// sandboxContainerSpecOpts generates OCI spec options for
+// the sandbox container.
+func (c *Controller) sandboxContainerSpecOpts(config *runtime.PodSandboxConfig, imageConfig *imagespec.ImageConfig) ([]oci.SpecOpts, error) {
+	var (
+		securityContext = config.GetLinux().GetSecurityContext()
+		specOpts        []oci.SpecOpts
+		err             error
+	)
+	ssp := securityContext.GetSeccomp()
+	if ssp == nil {
+		ssp, err = generateSeccompSecurityProfile(
+			securityContext.GetSeccompProfilePath(), //nolint:staticcheck // Deprecated but we don't want to remove yet
+			c.config.UnsetSeccompProfile)
+		if err != nil {
+			return nil, fmt.Errorf("failed to generate seccomp spec opts: %w", err)
+		}
+	}
+	seccompSpecOpts, err := c.generateSeccompSpecOpts(
+		ssp,
+		securityContext.GetPrivileged(),
+		c.seccompEnabled())
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate seccomp spec opts: %w", err)
+	}
+	if seccompSpecOpts != nil {
+		specOpts = append(specOpts, seccompSpecOpts)
+	}
+
+	userstr, err := generateUserString(
+		"",
+		securityContext.GetRunAsUser(),
+		securityContext.GetRunAsGroup(),
+	)
+	if err != nil {
+		return nil, fmt.Errorf("failed to generate user string: %w", err)
+	}
+	if userstr == "" {
+		// Lastly, since no user override was passed via CRI try to set via OCI
+		// Image
+		userstr = imageConfig.User
+	}
+	if userstr != "" {
+		specOpts = append(specOpts, oci.WithUser(userstr))
+	}
+	return specOpts, nil
+}
+
+// setupSandboxFiles sets up necessary sandbox files including /dev/shm, /etc/hosts,
+// /etc/resolv.conf and /etc/hostname.
+func (c *Controller) setupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {
+	sandboxEtcHostname := c.getSandboxHostname(id)
+	hostname := config.GetHostname()
+	if hostname == "" {
+		var err error
+		hostname, err = c.os.Hostname()
+		if err != nil {
+			return fmt.Errorf("failed to get hostname: %w", err)
+		}
+	}
+	if err := c.os.WriteFile(sandboxEtcHostname, []byte(hostname+"\n"), 0644); err != nil {
+		return fmt.Errorf("failed to write hostname to %q: %w", sandboxEtcHostname, err)
+	}
+
+	// TODO(random-liu): Consider whether we should maintain /etc/hosts and /etc/resolv.conf in kubelet.
+	sandboxEtcHosts := c.getSandboxHosts(id)
+	if err := c.os.CopyFile(etcHosts, sandboxEtcHosts, 0644); err != nil {
+		return fmt.Errorf("failed to generate sandbox hosts file %q: %w", sandboxEtcHosts, err)
+	}
+
+	// Set DNS options. Maintain a resolv.conf for the sandbox.
+	var err error
+	resolvContent := ""
+	if dnsConfig := config.GetDnsConfig(); dnsConfig != nil {
+		resolvContent, err = parseDNSOptions(dnsConfig.Servers, dnsConfig.Searches, dnsConfig.Options)
+		if err != nil {
+			return fmt.Errorf("failed to parse sandbox DNSConfig %+v: %w", dnsConfig, err)
+		}
+	}
+	resolvPath := c.getResolvPath(id)
+	if resolvContent == "" {
+		// copy host's resolv.conf to resolvPath
+		err = c.os.CopyFile(resolvConfPath, resolvPath, 0644)
+		if err != nil {
+			return fmt.Errorf("failed to copy host's resolv.conf to %q: %w", resolvPath, err)
+		}
+	} else {
+		err = c.os.WriteFile(resolvPath, []byte(resolvContent), 0644)
+		if err != nil {
+			return fmt.Errorf("failed to write resolv content to %q: %w", resolvPath, err)
+		}
+	}
+
+	// Setup sandbox /dev/shm.
+	if config.GetLinux().GetSecurityContext().GetNamespaceOptions().GetIpc() == runtime.NamespaceMode_NODE {
+		if _, err := c.os.Stat(devShm); err != nil {
+			return fmt.Errorf("host %q is not available for host ipc: %w", devShm, err)
+		}
+	} else {
+		sandboxDevShm := c.getSandboxDevShm(id)
+		if err := c.os.MkdirAll(sandboxDevShm, 0700); err != nil {
+			return fmt.Errorf("failed to create sandbox shm: %w", err)
+		}
+		shmproperty := fmt.Sprintf("mode=1777,size=%d", defaultShmSize)
+		if err := c.os.(osinterface.UNIX).Mount("shm", sandboxDevShm, "tmpfs", uintptr(unix.MS_NOEXEC|unix.MS_NOSUID|unix.MS_NODEV), shmproperty); err != nil {
+			return fmt.Errorf("failed to mount sandbox shm: %w", err)
+		}
+	}
+
+	return nil
+}
+
+// parseDNSOptions parse DNS options into resolv.conf format content,
+// if none option is specified, will return empty with no error.
+func parseDNSOptions(servers, searches, options []string) (string, error) {
+	resolvContent := ""
+
+	if len(searches) > 0 {
+		resolvContent += fmt.Sprintf("search %s\n", strings.Join(searches, " "))
+	}
+
+	if len(servers) > 0 {
+		resolvContent += fmt.Sprintf("nameserver %s\n", strings.Join(servers, "\nnameserver "))
+	}
+
+	if len(options) > 0 {
+		resolvContent += fmt.Sprintf("options %s\n", strings.Join(options, " "))
+	}
+
+	return resolvContent, nil
+}
+
+// cleanupSandboxFiles unmount some sandbox files, we rely on the removal of sandbox root directory to
+// remove these files. Unmount should *NOT* return error if the mount point is already unmounted.
+func (c *Controller) cleanupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {
+	if config.GetLinux().GetSecurityContext().GetNamespaceOptions().GetIpc() != runtime.NamespaceMode_NODE {
+		path, err := c.os.FollowSymlinkInScope(c.getSandboxDevShm(id), "/")
+		if err != nil {
+			return fmt.Errorf("failed to follow symlink: %w", err)
+		}
+		if err := c.os.(osinterface.UNIX).Unmount(path); err != nil && !os.IsNotExist(err) {
+			return fmt.Errorf("failed to unmount %q: %w", path, err)
+		}
+	}
+	return nil
+}
+
+// taskOpts generates task options for a (sandbox) container.
+func (c *Controller) taskOpts(runtimeType string) []containerd.NewTaskOpts {
+	// TODO(random-liu): Remove this after shim v1 is deprecated.
+	var taskOpts []containerd.NewTaskOpts
+
+	// c.config.NoPivot is only supported for RuntimeLinuxV1 = "io.containerd.runtime.v1.linux" legacy linux runtime
+	// and is not supported for RuntimeRuncV1 = "io.containerd.runc.v1" or  RuntimeRuncV2 = "io.containerd.runc.v2"
+	// for RuncV1/2 no pivot is set under the containerd.runtimes.runc.options config see
+	// https://github.com/containerd/containerd/blob/v1.3.2/runtime/v2/runc/options/oci.pb.go#L26
+	if c.config.NoPivot && runtimeType == plugin.RuntimeLinuxV1 {
+		taskOpts = append(taskOpts, containerd.WithNoPivotRoot)
+	}
+
+	return taskOpts
+}

pkg/cri/sbserver/podsandbox/sandbox_run_linux_test.go

@@ -14,7 +14,7 @@
    limitations under the License.
 */
 
-package sbserver
+package podsandbox
 
 import (
 	"os"
@@ -236,7 +236,7 @@ func TestLinuxSandboxContainerSpec(t *testing.T) {
 		},
 	} {
 		t.Run(desc, func(t *testing.T) {
-			c := newTestCRIService()
+			c := newControllerService()
 			c.config.EnableUnprivilegedICMP = true
 			c.config.EnableUnprivilegedPorts = true
 			config, imageConfig, specCheck := getRunPodSandboxTestData()
@@ -428,7 +428,7 @@ options timeout:1
 		},
 	} {
 		t.Run(desc, func(t *testing.T) {
-			c := newTestCRIService()
+			c := newControllerService()
 			c.os.(*ostesting.FakeOS).HostnameFn = func() (string, error) {
 				return realhostname, nil
 			}
@@ -509,7 +509,7 @@ options timeout:1
 
 func TestSandboxDisableCgroup(t *testing.T) {
 	config, imageConfig, _ := getRunPodSandboxTestData()
-	c := newTestCRIService()
+	c := newControllerService()
 	c.config.DisableCgroup = true
 	spec, err := c.sandboxContainerSpec("test-id", config, imageConfig, "test-cni", []string{})
 	require.NoError(t, err)

pkg/cri/sbserver/podsandbox/sandbox_run_other.go

@@ -0,0 +1,56 @@
+//go:build !windows && !linux
+// +build !windows,!linux
+
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	"github.com/containerd/containerd"
+	"github.com/containerd/containerd/oci"
+	imagespec "github.com/opencontainers/image-spec/specs-go/v1"
+	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
+	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
+)
+
+func (c *Controller) sandboxContainerSpec(id string, config *runtime.PodSandboxConfig,
+	imageConfig *imagespec.ImageConfig, nsPath string, runtimePodAnnotations []string) (_ *runtimespec.Spec, retErr error) {
+	return c.runtimeSpec(id, "")
+}
+
+// sandboxContainerSpecOpts generates OCI spec options for
+// the sandbox container.
+func (c *Controller) sandboxContainerSpecOpts(config *runtime.PodSandboxConfig, imageConfig *imagespec.ImageConfig) ([]oci.SpecOpts, error) {
+	return []oci.SpecOpts{}, nil
+}
+
+// setupSandboxFiles sets up necessary sandbox files including /dev/shm, /etc/hosts,
+// /etc/resolv.conf and /etc/hostname.
+func (c *Controller) setupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {
+	return nil
+}
+
+// cleanupSandboxFiles unmount some sandbox files, we rely on the removal of sandbox root directory to
+// remove these files. Unmount should *NOT* return error if the mount point is already unmounted.
+func (c *Controller) cleanupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {
+	return nil
+}
+
+// taskOpts generates task options for a (sandbox) container.
+func (c *Controller) taskOpts(runtimeType string) []containerd.NewTaskOpts {
+	return []containerd.NewTaskOpts{}
+}

pkg/cri/sbserver/podsandbox/sandbox_run_other_test.go

@@ -17,7 +17,7 @@
    limitations under the License.
 */
 
-package sbserver
+package podsandbox
 
 import (
 	"testing"

pkg/cri/sbserver/podsandbox/sandbox_run_test.go

@@ -0,0 +1,372 @@
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	goruntime "runtime"
+	"testing"
+
+	"github.com/containerd/typeurl"
+	imagespec "github.com/opencontainers/image-spec/specs-go/v1"
+	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
+	"github.com/stretchr/testify/assert"
+	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
+
+	"github.com/containerd/containerd/pkg/cri/annotations"
+	criconfig "github.com/containerd/containerd/pkg/cri/config"
+	sandboxstore "github.com/containerd/containerd/pkg/cri/store/sandbox"
+)
+
+func TestSandboxContainerSpec(t *testing.T) {
+	switch goruntime.GOOS {
+	case "darwin":
+		t.Skip("not implemented on Darwin")
+	case "freebsd":
+		t.Skip("not implemented on FreeBSD")
+	}
+	testID := "test-id"
+	nsPath := "test-cni"
+	for desc, test := range map[string]struct {
+		configChange      func(*runtime.PodSandboxConfig)
+		podAnnotations    []string
+		imageConfigChange func(*imagespec.ImageConfig)
+		specCheck         func(*testing.T, *runtimespec.Spec)
+		expectErr         bool
+	}{
+		"should return error when entrypoint and cmd are empty": {
+			imageConfigChange: func(c *imagespec.ImageConfig) {
+				c.Entrypoint = nil
+				c.Cmd = nil
+			},
+			expectErr: true,
+		},
+		"a passthrough annotation should be passed as an OCI annotation": {
+			podAnnotations: []string{"c"},
+			specCheck: func(t *testing.T, spec *runtimespec.Spec) {
+				assert.Equal(t, spec.Annotations["c"], "d")
+			},
+		},
+		"a non-passthrough annotation should not be passed as an OCI annotation": {
+			configChange: func(c *runtime.PodSandboxConfig) {
+				c.Annotations["d"] = "e"
+			},
+			podAnnotations: []string{"c"},
+			specCheck: func(t *testing.T, spec *runtimespec.Spec) {
+				assert.Equal(t, spec.Annotations["c"], "d")
+				_, ok := spec.Annotations["d"]
+				assert.False(t, ok)
+			},
+		},
+		"passthrough annotations should support wildcard match": {
+			configChange: func(c *runtime.PodSandboxConfig) {
+				c.Annotations["t.f"] = "j"
+				c.Annotations["z.g"] = "o"
+				c.Annotations["z"] = "o"
+				c.Annotations["y.ca"] = "b"
+				c.Annotations["y"] = "b"
+			},
+			podAnnotations: []string{"t*", "z.*", "y.c*"},
+			specCheck: func(t *testing.T, spec *runtimespec.Spec) {
+				assert.Equal(t, spec.Annotations["t.f"], "j")
+				assert.Equal(t, spec.Annotations["z.g"], "o")
+				assert.Equal(t, spec.Annotations["y.ca"], "b")
+				_, ok := spec.Annotations["y"]
+				assert.False(t, ok)
+				_, ok = spec.Annotations["z"]
+				assert.False(t, ok)
+			},
+		},
+	} {
+		t.Run(desc, func(t *testing.T) {
+			c := newControllerService()
+			config, imageConfig, specCheck := getRunPodSandboxTestData()
+			if test.configChange != nil {
+				test.configChange(config)
+			}
+
+			if test.imageConfigChange != nil {
+				test.imageConfigChange(imageConfig)
+			}
+			spec, err := c.sandboxContainerSpec(testID, config, imageConfig, nsPath,
+				test.podAnnotations)
+			if test.expectErr {
+				assert.Error(t, err)
+				assert.Nil(t, spec)
+				return
+			}
+			assert.NoError(t, err)
+			assert.NotNil(t, spec)
+			specCheck(t, testID, spec)
+			if test.specCheck != nil {
+				test.specCheck(t, spec)
+			}
+		})
+	}
+}
+
+func TestTypeurlMarshalUnmarshalSandboxMeta(t *testing.T) {
+	for desc, test := range map[string]struct {
+		configChange func(*runtime.PodSandboxConfig)
+	}{
+		"should marshal original config": {},
+		"should marshal Linux": {
+			configChange: func(c *runtime.PodSandboxConfig) {
+				if c.Linux == nil {
+					c.Linux = &runtime.LinuxPodSandboxConfig{}
+				}
+				c.Linux.SecurityContext = &runtime.LinuxSandboxSecurityContext{
+					NamespaceOptions: &runtime.NamespaceOption{
+						Network: runtime.NamespaceMode_NODE,
+						Pid:     runtime.NamespaceMode_NODE,
+						Ipc:     runtime.NamespaceMode_NODE,
+					},
+					SupplementalGroups: []int64{1111, 2222},
+				}
+			},
+		},
+	} {
+		t.Run(desc, func(t *testing.T) {
+			meta := &sandboxstore.Metadata{
+				ID:        "1",
+				Name:      "sandbox_1",
+				NetNSPath: "/home/cloud",
+			}
+			meta.Config, _, _ = getRunPodSandboxTestData()
+			if test.configChange != nil {
+				test.configChange(meta.Config)
+			}
+
+			any, err := typeurl.MarshalAny(meta)
+			assert.NoError(t, err)
+			data, err := typeurl.UnmarshalAny(any)
+			assert.NoError(t, err)
+			assert.IsType(t, &sandboxstore.Metadata{}, data)
+			curMeta, ok := data.(*sandboxstore.Metadata)
+			assert.True(t, ok)
+			assert.Equal(t, meta, curMeta)
+		})
+	}
+}
+
+func TestHostAccessingSandbox(t *testing.T) {
+	privilegedContext := &runtime.PodSandboxConfig{
+		Linux: &runtime.LinuxPodSandboxConfig{
+			SecurityContext: &runtime.LinuxSandboxSecurityContext{
+				Privileged: true,
+			},
+		},
+	}
+	nonPrivilegedContext := &runtime.PodSandboxConfig{
+		Linux: &runtime.LinuxPodSandboxConfig{
+			SecurityContext: &runtime.LinuxSandboxSecurityContext{
+				Privileged: false,
+			},
+		},
+	}
+	hostNamespace := &runtime.PodSandboxConfig{
+		Linux: &runtime.LinuxPodSandboxConfig{
+			SecurityContext: &runtime.LinuxSandboxSecurityContext{
+				Privileged: false,
+				NamespaceOptions: &runtime.NamespaceOption{
+					Network: runtime.NamespaceMode_NODE,
+					Pid:     runtime.NamespaceMode_NODE,
+					Ipc:     runtime.NamespaceMode_NODE,
+				},
+			},
+		},
+	}
+	tests := []struct {
+		name   string
+		config *runtime.PodSandboxConfig
+		want   bool
+	}{
+		{"Security Context is nil", nil, false},
+		{"Security Context is privileged", privilegedContext, false},
+		{"Security Context is not privileged", nonPrivilegedContext, false},
+		{"Security Context namespace host access", hostNamespace, true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := hostAccessingSandbox(tt.config); got != tt.want {
+				t.Errorf("hostAccessingSandbox() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestGetSandboxRuntime(t *testing.T) {
+	untrustedWorkloadRuntime := criconfig.Runtime{
+		Type:   "io.containerd.runtime.v1.linux",
+		Engine: "untrusted-workload-runtime",
+		Root:   "",
+	}
+
+	defaultRuntime := criconfig.Runtime{
+		Type:   "io.containerd.runtime.v1.linux",
+		Engine: "default-runtime",
+		Root:   "",
+	}
+
+	fooRuntime := criconfig.Runtime{
+		Type:   "io.containerd.runtime.v1.linux",
+		Engine: "foo-bar",
+		Root:   "",
+	}
+
+	for desc, test := range map[string]struct {
+		sandboxConfig   *runtime.PodSandboxConfig
+		runtimeHandler  string
+		runtimes        map[string]criconfig.Runtime
+		expectErr       bool
+		expectedRuntime criconfig.Runtime
+	}{
+		"should return error if untrusted workload requires host access": {
+			sandboxConfig: &runtime.PodSandboxConfig{
+				Linux: &runtime.LinuxPodSandboxConfig{
+					SecurityContext: &runtime.LinuxSandboxSecurityContext{
+						Privileged: false,
+						NamespaceOptions: &runtime.NamespaceOption{
+							Network: runtime.NamespaceMode_NODE,
+							Pid:     runtime.NamespaceMode_NODE,
+							Ipc:     runtime.NamespaceMode_NODE,
+						},
+					},
+				},
+				Annotations: map[string]string{
+					annotations.UntrustedWorkload: "true",
+				},
+			},
+			runtimes: map[string]criconfig.Runtime{
+				criconfig.RuntimeDefault:   defaultRuntime,
+				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
+			},
+			expectErr: true,
+		},
+		"should use untrusted workload runtime for untrusted workload": {
+			sandboxConfig: &runtime.PodSandboxConfig{
+				Annotations: map[string]string{
+					annotations.UntrustedWorkload: "true",
+				},
+			},
+			runtimes: map[string]criconfig.Runtime{
+				criconfig.RuntimeDefault:   defaultRuntime,
+				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
+			},
+			expectedRuntime: untrustedWorkloadRuntime,
+		},
+		"should use default runtime for regular workload": {
+			sandboxConfig: &runtime.PodSandboxConfig{},
+			runtimes: map[string]criconfig.Runtime{
+				criconfig.RuntimeDefault: defaultRuntime,
+			},
+			expectedRuntime: defaultRuntime,
+		},
+		"should use default runtime for trusted workload": {
+			sandboxConfig: &runtime.PodSandboxConfig{
+				Annotations: map[string]string{
+					annotations.UntrustedWorkload: "false",
+				},
+			},
+			runtimes: map[string]criconfig.Runtime{
+				criconfig.RuntimeDefault:   defaultRuntime,
+				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
+			},
+			expectedRuntime: defaultRuntime,
+		},
+		"should return error if untrusted workload runtime is required but not configured": {
+			sandboxConfig: &runtime.PodSandboxConfig{
+				Annotations: map[string]string{
+					annotations.UntrustedWorkload: "true",
+				},
+			},
+			runtimes: map[string]criconfig.Runtime{
+				criconfig.RuntimeDefault: defaultRuntime,
+			},
+			expectErr: true,
+		},
+		"should use 'untrusted' runtime for untrusted workload": {
+			sandboxConfig: &runtime.PodSandboxConfig{
+				Annotations: map[string]string{
+					annotations.UntrustedWorkload: "true",
+				},
+			},
+			runtimes: map[string]criconfig.Runtime{
+				criconfig.RuntimeDefault:   defaultRuntime,
+				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
+			},
+			expectedRuntime: untrustedWorkloadRuntime,
+		},
+		"should use 'untrusted' runtime for untrusted workload & handler": {
+			sandboxConfig: &runtime.PodSandboxConfig{
+				Annotations: map[string]string{
+					annotations.UntrustedWorkload: "true",
+				},
+			},
+			runtimeHandler: "untrusted",
+			runtimes: map[string]criconfig.Runtime{
+				criconfig.RuntimeDefault:   defaultRuntime,
+				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
+			},
+			expectedRuntime: untrustedWorkloadRuntime,
+		},
+		"should return an error if untrusted annotation with conflicting handler": {
+			sandboxConfig: &runtime.PodSandboxConfig{
+				Annotations: map[string]string{
+					annotations.UntrustedWorkload: "true",
+				},
+			},
+			runtimeHandler: "foo",
+			runtimes: map[string]criconfig.Runtime{
+				criconfig.RuntimeDefault:   defaultRuntime,
+				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
+				"foo":                      fooRuntime,
+			},
+			expectErr: true,
+		},
+		"should use correct runtime for a runtime handler": {
+			sandboxConfig:  &runtime.PodSandboxConfig{},
+			runtimeHandler: "foo",
+			runtimes: map[string]criconfig.Runtime{
+				criconfig.RuntimeDefault:   defaultRuntime,
+				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
+				"foo":                      fooRuntime,
+			},
+			expectedRuntime: fooRuntime,
+		},
+		"should return error if runtime handler is required but not configured": {
+			sandboxConfig:  &runtime.PodSandboxConfig{},
+			runtimeHandler: "bar",
+			runtimes: map[string]criconfig.Runtime{
+				criconfig.RuntimeDefault: defaultRuntime,
+				"foo":                    fooRuntime,
+			},
+			expectErr: true,
+		},
+	} {
+		t.Run(desc, func(t *testing.T) {
+			cri := newControllerService()
+			cri.config = criconfig.Config{
+				PluginConfig: criconfig.DefaultConfig(),
+			}
+			cri.config.ContainerdConfig.DefaultRuntimeName = criconfig.RuntimeDefault
+			cri.config.ContainerdConfig.Runtimes = test.runtimes
+			r, err := cri.getSandboxRuntime(test.sandboxConfig, test.runtimeHandler)
+			assert.Equal(t, test.expectErr, err != nil)
+			assert.Equal(t, test.expectedRuntime, r)
+		})
+	}
+}

pkg/cri/sbserver/podsandbox/sandbox_run_windows.go

@@ -0,0 +1,113 @@
+/*
+   Copyright The containerd 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 podsandbox
+
+import (
+	"fmt"
+	"strconv"
+
+	"github.com/containerd/containerd"
+	"github.com/containerd/containerd/oci"
+	imagespec "github.com/opencontainers/image-spec/specs-go/v1"
+	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
+	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
+
+	"github.com/containerd/containerd/pkg/cri/annotations"
+	customopts "github.com/containerd/containerd/pkg/cri/opts"
+)
+
+func (c *Controller) sandboxContainerSpec(id string, config *runtime.PodSandboxConfig,
+	imageConfig *imagespec.ImageConfig, nsPath string, runtimePodAnnotations []string) (*runtimespec.Spec, error) {
+	// Creates a spec Generator with the default spec.
+	specOpts := []oci.SpecOpts{
+		oci.WithEnv(imageConfig.Env),
+		oci.WithHostname(config.GetHostname()),
+	}
+	if imageConfig.WorkingDir != "" {
+		specOpts = append(specOpts, oci.WithProcessCwd(imageConfig.WorkingDir))
+	}
+
+	if len(imageConfig.Entrypoint) == 0 && len(imageConfig.Cmd) == 0 {
+		// Pause image must have entrypoint or cmd.
+		return nil, fmt.Errorf("invalid empty entrypoint and cmd in image config %+v", imageConfig)
+	}
+	specOpts = append(specOpts, oci.WithProcessArgs(append(imageConfig.Entrypoint, imageConfig.Cmd...)...))
+
+	specOpts = append(specOpts,
+		// Clear the root location since hcsshim expects it.
+		// NOTE: readonly rootfs doesn't work on windows.
+		customopts.WithoutRoot,
+		customopts.WithWindowsNetworkNamespace(nsPath),
+	)
+
+	specOpts = append(specOpts, customopts.WithWindowsDefaultSandboxShares)
+
+	// Start with the image config user and override below if RunAsUsername is not "".
+	username := imageConfig.User
+
+	runAsUser := config.GetWindows().GetSecurityContext().GetRunAsUsername()
+	if runAsUser != "" {
+		username = runAsUser
+	}
+
+	cs := config.GetWindows().GetSecurityContext().GetCredentialSpec()
+	if cs != "" {
+		specOpts = append(specOpts, customopts.WithWindowsCredentialSpec(cs))
+	}
+
+	// There really isn't a good Windows way to verify that the username is available in the
+	// image as early as here like there is for Linux. Later on in the stack hcsshim
+	// will handle the behavior of erroring out if the user isn't available in the image
+	// when trying to run the init process.
+	specOpts = append(specOpts, oci.WithUser(username))
+
+	for pKey, pValue := range getPassthroughAnnotations(config.Annotations,
+		runtimePodAnnotations) {
+		specOpts = append(specOpts, customopts.WithAnnotation(pKey, pValue))
+	}
+
+	specOpts = append(specOpts,
+		customopts.WithAnnotation(annotations.ContainerType, annotations.ContainerTypeSandbox),
+		customopts.WithAnnotation(annotations.SandboxID, id),
+		customopts.WithAnnotation(annotations.SandboxNamespace, config.GetMetadata().GetNamespace()),
+		customopts.WithAnnotation(annotations.SandboxName, config.GetMetadata().GetName()),
+		customopts.WithAnnotation(annotations.SandboxLogDir, config.GetLogDirectory()),
+		customopts.WithAnnotation(annotations.WindowsHostProcess, strconv.FormatBool(config.GetWindows().GetSecurityContext().GetHostProcess())),
+	)
+
+	return c.runtimeSpec(id, "", specOpts...)
+}
+
+// No sandbox container spec options for windows yet.
+func (c *Controller) sandboxContainerSpecOpts(config *runtime.PodSandboxConfig, imageConfig *imagespec.ImageConfig) ([]oci.SpecOpts, error) {
+	return nil, nil
+}
+
+// No sandbox files needed for windows.
+func (c *Controller) setupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {
+	return nil
+}
+
+// No sandbox files needed for windows.
+func (c *Controller) cleanupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {
+	return nil
+}
+
+// No task options needed for windows.
+func (c *Controller) taskOpts(runtimeType string) []containerd.NewTaskOpts {
+	return nil
+}

pkg/cri/sbserver/podsandbox/sandbox_run_windows_test.go

@@ -14,7 +14,7 @@
    limitations under the License.
 */
 
-package sbserver
+package podsandbox
 
 import (
 	"testing"
@@ -95,7 +95,7 @@ func getRunPodSandboxTestData() (*runtime.PodSandboxConfig, *imagespec.ImageConf
 func TestSandboxWindowsNetworkNamespace(t *testing.T) {
 	testID := "test-id"
 	nsPath := "test-cni"
-	c := newTestCRIService()
+	c := newControllerService()
 
 	config, imageConfig, specCheck := getRunPodSandboxTestData()
 	spec, err := c.sandboxContainerSpec(testID, config, imageConfig, nsPath, nil)

pkg/cri/sbserver/sandbox_remove.go

@@ -108,6 +108,10 @@ func (c *criService) RemovePodSandbox(ctx context.Context, r *runtime.RemovePodS
 	// 3) On-going operations which have held the reference will not be affected.
 	c.sandboxStore.Delete(id)
 
+	if err := c.client.SandboxStore().Delete(ctx, id); err != nil {
+		return nil, fmt.Errorf("failed to remove sandbox metadata from store: %w", err)
+	}
+
 	// Release the sandbox name reserved for the sandbox.
 	c.sandboxNameIndex.ReleaseByKey(id)
 

pkg/cri/sbserver/sandbox_run.go

@@ -27,28 +27,21 @@ import (
 	"strings"
 	"time"
 
+	"github.com/containerd/containerd/protobuf"
+	sb "github.com/containerd/containerd/sandbox"
 	"github.com/containerd/go-cni"
-	"github.com/containerd/nri"
-	v1 "github.com/containerd/nri/types/v1"
 	"github.com/containerd/typeurl"
-	"github.com/davecgh/go-spew/spew"
-	"github.com/opencontainers/selinux/go-selinux"
 	"github.com/sirupsen/logrus"
 	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
 
-	"github.com/containerd/containerd"
-	containerdio "github.com/containerd/containerd/cio"
-	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/log"
 	"github.com/containerd/containerd/pkg/cri/annotations"
 	criconfig "github.com/containerd/containerd/pkg/cri/config"
-	customopts "github.com/containerd/containerd/pkg/cri/opts"
 	"github.com/containerd/containerd/pkg/cri/server/bandwidth"
 	sandboxstore "github.com/containerd/containerd/pkg/cri/store/sandbox"
 	"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/snapshots"
 )
 
 func init() {
@@ -82,6 +75,15 @@ func (c *criService) RunPodSandbox(ctx context.Context, r *runtime.RunPodSandbox
 		}
 	}()
 
+	sandboxInfo := sb.Sandbox{
+		ID: id,
+		// TODO: runtime handler can be an empty string, should use default one and enable back validation of this field in metadata store.
+		Runtime: sb.RuntimeOpts{Name: r.GetRuntimeHandler()},
+	}
+
+	// Save sandbox name
+	sandboxInfo.AddLabel("name", name)
+
 	// Create initial internal sandbox object.
 	sandbox := sandboxstore.NewSandbox(
 		sandboxstore.Metadata{
@@ -95,23 +97,10 @@ func (c *criService) RunPodSandbox(ctx context.Context, r *runtime.RunPodSandbox
 		},
 	)
 
-	// Ensure sandbox container image snapshot.
+	var (
-	image, err := c.ensureImageExists(ctx, c.config.SandboxImage, config)
+		podNetwork = true
-	if err != nil {
+		err        error
-		return nil, 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)
-	}
-
-	ociRuntime, err := c.getSandboxRuntime(config, r.GetRuntimeHandler())
-	if err != nil {
-		return nil, fmt.Errorf("failed to get sandbox runtime: %w", err)
-	}
-	log.G(ctx).WithField("podsandboxid", id).Debugf("use OCI runtime %+v", ociRuntime)
-
-	podNetwork := true
 
 	if goruntime.GOOS != "windows" &&
 		config.GetLinux().GetSecurityContext().GetNamespaceOptions().GetNetwork() == runtime.NamespaceMode_NODE {
@@ -169,176 +158,44 @@ func (c *criService) RunPodSandbox(ctx context.Context, r *runtime.RunPodSandbox
 		sandboxCreateNetworkTimer.UpdateSince(netStart)
 	}
 
+	// Save sandbox metadata to store
+	if err := sandboxInfo.AddExtension("metadata", &sandbox.Metadata); err != nil {
+		return nil, fmt.Errorf("unable to save sandbox %q to store: %w", id, err)
+	}
+
+	if _, err := c.client.SandboxStore().Create(ctx, sandboxInfo); err != nil {
+		return nil, fmt.Errorf("failed to save sandbox metadata: %w", err)
+	}
+
 	runtimeStart := time.Now()
-	// Create sandbox container.
+
-	// NOTE: sandboxContainerSpec SHOULD NOT have side
+	resp, err := c.sandboxController.Start(ctx, id)
-	// effect, e.g. accessing/creating files, so that we can test
-	// it safely.
-	spec, err := c.sandboxContainerSpec(id, config, &image.ImageSpec.Config, sandbox.NetNSPath, ociRuntime.PodAnnotations)
 	if err != nil {
-		return nil, fmt.Errorf("failed to generate sandbox container spec: %w", err)
+		return nil, fmt.Errorf("failed to start sandbox %q: %w", id, err)
-	}
-	log.G(ctx).WithField("podsandboxid", id).Debugf("sandbox container spec: %#+v", spew.NewFormatter(spec))
-	sandbox.ProcessLabel = spec.Process.SelinuxLabel
-	defer func() {
-		if retErr != nil {
-			selinux.ReleaseLabel(sandbox.ProcessLabel)
-		}
-	}()
-
-	// handle any KVM based runtime
-	if err := modifyProcessLabel(ociRuntime.Type, spec); err != nil {
-		return nil, err
 	}
 
-	if config.GetLinux().GetSecurityContext().GetPrivileged() {
+	labels := resp.GetLabels()
-		// If privileged don't set selinux label, but we still record the MCS label so that
+	if labels == nil {
-		// the unused label can be freed later.
+		labels = map[string]string{}
-		spec.Process.SelinuxLabel = ""
 	}
 
-	// Generate spec options that will be applied to the spec later.
+	sandbox.ProcessLabel = labels["selinux_label"]
-	specOpts, err := c.sandboxContainerSpecOpts(config, &image.ImageSpec.Config)
-	if err != nil {
-		return nil, fmt.Errorf("failed to generate sandbox container spec options: %w", err)
-	}
-
-	sandboxLabels := buildLabels(config.Labels, image.ImageSpec.Config.Labels, containerKindSandbox)
-
-	runtimeOpts, err := generateRuntimeOptions(ociRuntime, c.config)
-	if err != nil {
-		return nil, fmt.Errorf("failed to generate runtime options: %w", err)
-	}
-	snapshotterOpt := snapshots.WithLabels(snapshots.FilterInheritedLabels(config.Annotations))
-	opts := []containerd.NewContainerOpts{
-		containerd.WithSnapshotter(c.runtimeSnapshotter(ctx, ociRuntime)),
-		customopts.WithNewSnapshot(id, containerdImage, snapshotterOpt),
-		containerd.WithSpec(spec, specOpts...),
-		containerd.WithContainerLabels(sandboxLabels),
-		containerd.WithContainerExtension(sandboxMetadataExtension, &sandbox.Metadata),
-		containerd.WithRuntime(ociRuntime.Type, runtimeOpts)}
-
-	container, err := c.client.NewContainer(ctx, id, opts...)
-	if err != nil {
-		return nil, fmt.Errorf("failed to create containerd container: %w", err)
-	}
-	defer func() {
-		if retErr != nil {
-			deferCtx, deferCancel := ctrdutil.DeferContext()
-			defer deferCancel()
-			if err := container.Delete(deferCtx, containerd.WithSnapshotCleanup); err != nil {
-				log.G(ctx).WithError(err).Errorf("Failed to delete containerd container %q", id)
-			}
-		}
-	}()
-
-	// 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",
-			sandboxRootDir, err)
-	}
-	defer func() {
-		if retErr != nil {
-			// Cleanup the sandbox root directory.
-			if err := c.os.RemoveAll(sandboxRootDir); err != nil {
-				log.G(ctx).WithError(err).Errorf("Failed to remove sandbox root directory %q",
-					sandboxRootDir)
-			}
-		}
-	}()
-	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",
-			volatileSandboxRootDir, err)
-	}
-	defer func() {
-		if retErr != nil {
-			// Cleanup the volatile sandbox root directory.
-			if err := c.os.RemoveAll(volatileSandboxRootDir); err != nil {
-				log.G(ctx).WithError(err).Errorf("Failed to remove volatile sandbox root directory %q",
-					volatileSandboxRootDir)
-			}
-		}
-	}()
-
-	// 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)
-	}
-	defer func() {
-		if retErr != nil {
-			if err = c.cleanupSandboxFiles(id, config); err != nil {
-				log.G(ctx).WithError(err).Errorf("Failed to cleanup sandbox files in %q",
-					sandboxRootDir)
-			}
-		}
-	}()
-
-	// Update sandbox created timestamp.
-	info, err := container.Info(ctx)
-	if err != nil {
-		return nil, fmt.Errorf("failed to get sandbox container info: %w", err)
-	}
-
-	// Create sandbox task in containerd.
-	log.G(ctx).Tracef("Create sandbox container (id=%q, name=%q).",
-		id, name)
-
-	taskOpts := c.taskOpts(ociRuntime.Type)
-	if ociRuntime.Path != "" {
-		taskOpts = append(taskOpts, containerd.WithRuntimePath(ociRuntime.Path))
-	}
-	// 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)
-	}
-	defer func() {
-		if retErr != nil {
-			deferCtx, deferCancel := ctrdutil.DeferContext()
-			defer deferCancel()
-			// Cleanup the sandbox container if an error is returned.
-			if _, err := task.Delete(deferCtx, WithNRISandboxDelete(id), containerd.WithProcessKill); err != nil && !errdefs.IsNotFound(err) {
-				log.G(ctx).WithError(err).Errorf("Failed to delete sandbox container %q", id)
-			}
-		}
-	}()
-
-	// 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)
-	}
-
-	nric, err := nri.New()
-	if err != nil {
-		return nil, fmt.Errorf("unable to create nri client: %w", err)
-	}
-	if nric != nil {
-		nriSB := &nri.Sandbox{
-			ID:     id,
-			Labels: config.Labels,
-		}
-		if _, err := nric.InvokeWithSandbox(ctx, task, v1.Create, nriSB); err != nil {
-			return nil, 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)
-	}
 
 	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 = task.Pid()
+		status.Pid = resp.Pid
 		status.State = sandboxstore.StateReady
-		status.CreatedAt = info.CreatedAt
+		status.CreatedAt = protobuf.FromTimestamp(resp.CreatedAt)
 		return status, nil
 	}); err != nil {
 		return nil, fmt.Errorf("failed to update sandbox status: %w", err)
 	}
 
+	// TODO: get rid of this. sandbox object should no longer have Container field.
+	container, err := c.client.LoadContainer(ctx, id)
+	if err != nil {
+		return nil, fmt.Errorf("failed to load container %q for sandbox: %w", id, err)
+	}
 	// Add sandbox into sandbox store in INIT state.
 	sandbox.Container = container
 
@@ -346,14 +203,7 @@ func (c *criService) RunPodSandbox(ctx context.Context, r *runtime.RunPodSandbox
 		return nil, fmt.Errorf("failed to add sandbox %+v into store: %w", sandbox, err)
 	}
 
-	// start the monitor after adding sandbox into the store, this ensures
+	sandboxRuntimeCreateTimer.WithValues(labels["oci_runtime_type"]).UpdateSince(runtimeStart)
-	// that sandbox is in the store, when event monitor receives the TaskExit event.
-	//
-	// 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, task.Pid(), exitCh)
-
-	sandboxRuntimeCreateTimer.WithValues(ociRuntime.Type).UpdateSince(runtimeStart)
 
 	return &runtime.RunPodSandboxResponse{PodSandboxId: id}, nil
 }

pkg/cri/sbserver/sandbox_run_linux.go

@@ -19,305 +19,14 @@ package sbserver
 import (
 	"fmt"
 	"os"
-	"strconv"
-	"strings"
 
 	"github.com/containerd/containerd"
-	"github.com/containerd/containerd/oci"
 	"github.com/containerd/containerd/plugin"
-	imagespec "github.com/opencontainers/image-spec/specs-go/v1"
-	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
-	"github.com/opencontainers/selinux/go-selinux"
-	"golang.org/x/sys/unix"
 	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
 
-	"github.com/containerd/containerd/pkg/cri/annotations"
-	customopts "github.com/containerd/containerd/pkg/cri/opts"
 	osinterface "github.com/containerd/containerd/pkg/os"
-	"github.com/containerd/containerd/pkg/userns"
 )
 
-func (c *criService) sandboxContainerSpec(id string, config *runtime.PodSandboxConfig,
-	imageConfig *imagespec.ImageConfig, nsPath string, runtimePodAnnotations []string) (_ *runtimespec.Spec, retErr error) {
-	// Creates a spec Generator with the default spec.
-	// TODO(random-liu): [P1] Compare the default settings with docker and containerd default.
-	specOpts := []oci.SpecOpts{
-		oci.WithoutRunMount,
-		customopts.WithoutDefaultSecuritySettings,
-		customopts.WithRelativeRoot(relativeRootfsPath),
-		oci.WithEnv(imageConfig.Env),
-		oci.WithRootFSReadonly(),
-		oci.WithHostname(config.GetHostname()),
-	}
-	if imageConfig.WorkingDir != "" {
-		specOpts = append(specOpts, oci.WithProcessCwd(imageConfig.WorkingDir))
-	}
-
-	if len(imageConfig.Entrypoint) == 0 && len(imageConfig.Cmd) == 0 {
-		// Pause image must have entrypoint or cmd.
-		return nil, fmt.Errorf("invalid empty entrypoint and cmd in image config %+v", imageConfig)
-	}
-	specOpts = append(specOpts, oci.WithProcessArgs(append(imageConfig.Entrypoint, imageConfig.Cmd...)...))
-
-	// Set cgroups parent.
-	if c.config.DisableCgroup {
-		specOpts = append(specOpts, customopts.WithDisabledCgroups)
-	} else {
-		if config.GetLinux().GetCgroupParent() != "" {
-			cgroupsPath := getCgroupsPath(config.GetLinux().GetCgroupParent(), id)
-			specOpts = append(specOpts, oci.WithCgroup(cgroupsPath))
-		}
-	}
-
-	// When cgroup parent is not set, containerd-shim will create container in a child cgroup
-	// of the cgroup itself is in.
-	// TODO(random-liu): [P2] Set default cgroup path if cgroup parent is not specified.
-
-	// Set namespace options.
-	var (
-		securityContext = config.GetLinux().GetSecurityContext()
-		nsOptions       = securityContext.GetNamespaceOptions()
-	)
-	if nsOptions.GetNetwork() == runtime.NamespaceMode_NODE {
-		specOpts = append(specOpts, customopts.WithoutNamespace(runtimespec.NetworkNamespace))
-		specOpts = append(specOpts, customopts.WithoutNamespace(runtimespec.UTSNamespace))
-	} else {
-		specOpts = append(specOpts, oci.WithLinuxNamespace(
-			runtimespec.LinuxNamespace{
-				Type: runtimespec.NetworkNamespace,
-				Path: nsPath,
-			}))
-	}
-	if nsOptions.GetPid() == runtime.NamespaceMode_NODE {
-		specOpts = append(specOpts, customopts.WithoutNamespace(runtimespec.PIDNamespace))
-	}
-	if nsOptions.GetIpc() == runtime.NamespaceMode_NODE {
-		specOpts = append(specOpts, customopts.WithoutNamespace(runtimespec.IPCNamespace))
-	}
-
-	// It's fine to generate the spec before the sandbox /dev/shm
-	// is actually created.
-	sandboxDevShm := c.getSandboxDevShm(id)
-	if nsOptions.GetIpc() == runtime.NamespaceMode_NODE {
-		sandboxDevShm = devShm
-	}
-	// Remove the default /dev/shm mount from defaultMounts, it is added in oci/mounts.go.
-	specOpts = append(specOpts, oci.WithoutMounts(devShm))
-	// In future the when user-namespace is enabled, the `nosuid, nodev, noexec` flags are
-	// required, otherwise the remount will fail with EPERM. Just use them unconditionally,
-	// they are nice to have anyways.
-	specOpts = append(specOpts, oci.WithMounts([]runtimespec.Mount{
-		{
-			Source:      sandboxDevShm,
-			Destination: devShm,
-			Type:        "bind",
-			Options:     []string{"rbind", "ro", "nosuid", "nodev", "noexec"},
-		},
-		// Add resolv.conf for katacontainers to setup the DNS of pod VM properly.
-		{
-			Source:      c.getResolvPath(id),
-			Destination: resolvConfPath,
-			Type:        "bind",
-			Options:     []string{"rbind", "ro"},
-		},
-	}))
-
-	processLabel, mountLabel, err := initLabelsFromOpt(securityContext.GetSelinuxOptions())
-	if err != nil {
-		return nil, fmt.Errorf("failed to init selinux options %+v: %w", securityContext.GetSelinuxOptions(), err)
-	}
-	defer func() {
-		if retErr != nil {
-			selinux.ReleaseLabel(processLabel)
-		}
-	}()
-
-	supplementalGroups := securityContext.GetSupplementalGroups()
-	specOpts = append(specOpts,
-		customopts.WithSelinuxLabels(processLabel, mountLabel),
-		customopts.WithSupplementalGroups(supplementalGroups),
-	)
-
-	// Add sysctls
-	sysctls := config.GetLinux().GetSysctls()
-	if sysctls == nil {
-		sysctls = make(map[string]string)
-	}
-	_, ipUnprivilegedPortStart := sysctls["net.ipv4.ip_unprivileged_port_start"]
-	_, pingGroupRange := sysctls["net.ipv4.ping_group_range"]
-	if nsOptions.GetNetwork() != runtime.NamespaceMode_NODE {
-		if c.config.EnableUnprivilegedPorts && !ipUnprivilegedPortStart {
-			sysctls["net.ipv4.ip_unprivileged_port_start"] = "0"
-		}
-		if c.config.EnableUnprivilegedICMP && !pingGroupRange && !userns.RunningInUserNS() {
-			sysctls["net.ipv4.ping_group_range"] = "0 2147483647"
-		}
-	}
-	specOpts = append(specOpts, customopts.WithSysctls(sysctls))
-
-	// Note: LinuxSandboxSecurityContext does not currently provide an apparmor profile
-
-	if !c.config.DisableCgroup {
-		specOpts = append(specOpts, customopts.WithDefaultSandboxShares)
-	}
-
-	if res := config.GetLinux().GetResources(); res != nil {
-		specOpts = append(specOpts,
-			customopts.WithAnnotation(annotations.SandboxCPUPeriod, strconv.FormatInt(res.CpuPeriod, 10)),
-			customopts.WithAnnotation(annotations.SandboxCPUQuota, strconv.FormatInt(res.CpuQuota, 10)),
-			customopts.WithAnnotation(annotations.SandboxCPUShares, strconv.FormatInt(res.CpuShares, 10)),
-			customopts.WithAnnotation(annotations.SandboxMem, strconv.FormatInt(res.MemoryLimitInBytes, 10)))
-	}
-
-	specOpts = append(specOpts, customopts.WithPodOOMScoreAdj(int(defaultSandboxOOMAdj), c.config.RestrictOOMScoreAdj))
-
-	for pKey, pValue := range getPassthroughAnnotations(config.Annotations,
-		runtimePodAnnotations) {
-		specOpts = append(specOpts, customopts.WithAnnotation(pKey, pValue))
-	}
-
-	specOpts = append(specOpts,
-		customopts.WithAnnotation(annotations.ContainerType, annotations.ContainerTypeSandbox),
-		customopts.WithAnnotation(annotations.SandboxID, id),
-		customopts.WithAnnotation(annotations.SandboxNamespace, config.GetMetadata().GetNamespace()),
-		customopts.WithAnnotation(annotations.SandboxName, config.GetMetadata().GetName()),
-		customopts.WithAnnotation(annotations.SandboxLogDir, config.GetLogDirectory()),
-	)
-
-	return c.runtimeSpec(id, "", specOpts...)
-}
-
-// sandboxContainerSpecOpts generates OCI spec options for
-// the sandbox container.
-func (c *criService) sandboxContainerSpecOpts(config *runtime.PodSandboxConfig, imageConfig *imagespec.ImageConfig) ([]oci.SpecOpts, error) {
-	var (
-		securityContext = config.GetLinux().GetSecurityContext()
-		specOpts        []oci.SpecOpts
-		err             error
-	)
-	ssp := securityContext.GetSeccomp()
-	if ssp == nil {
-		ssp, err = generateSeccompSecurityProfile(
-			securityContext.GetSeccompProfilePath(), //nolint:staticcheck // Deprecated but we don't want to remove yet
-			c.config.UnsetSeccompProfile)
-		if err != nil {
-			return nil, fmt.Errorf("failed to generate seccomp spec opts: %w", err)
-		}
-	}
-	seccompSpecOpts, err := c.generateSeccompSpecOpts(
-		ssp,
-		securityContext.GetPrivileged(),
-		c.seccompEnabled())
-	if err != nil {
-		return nil, fmt.Errorf("failed to generate seccomp spec opts: %w", err)
-	}
-	if seccompSpecOpts != nil {
-		specOpts = append(specOpts, seccompSpecOpts)
-	}
-
-	userstr, err := generateUserString(
-		"",
-		securityContext.GetRunAsUser(),
-		securityContext.GetRunAsGroup(),
-	)
-	if err != nil {
-		return nil, fmt.Errorf("failed to generate user string: %w", err)
-	}
-	if userstr == "" {
-		// Lastly, since no user override was passed via CRI try to set via OCI
-		// Image
-		userstr = imageConfig.User
-	}
-	if userstr != "" {
-		specOpts = append(specOpts, oci.WithUser(userstr))
-	}
-	return specOpts, nil
-}
-
-// setupSandboxFiles sets up necessary sandbox files including /dev/shm, /etc/hosts,
-// /etc/resolv.conf and /etc/hostname.
-func (c *criService) setupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {
-	sandboxEtcHostname := c.getSandboxHostname(id)
-	hostname := config.GetHostname()
-	if hostname == "" {
-		var err error
-		hostname, err = c.os.Hostname()
-		if err != nil {
-			return fmt.Errorf("failed to get hostname: %w", err)
-		}
-	}
-	if err := c.os.WriteFile(sandboxEtcHostname, []byte(hostname+"\n"), 0644); err != nil {
-		return fmt.Errorf("failed to write hostname to %q: %w", sandboxEtcHostname, err)
-	}
-
-	// TODO(random-liu): Consider whether we should maintain /etc/hosts and /etc/resolv.conf in kubelet.
-	sandboxEtcHosts := c.getSandboxHosts(id)
-	if err := c.os.CopyFile(etcHosts, sandboxEtcHosts, 0644); err != nil {
-		return fmt.Errorf("failed to generate sandbox hosts file %q: %w", sandboxEtcHosts, err)
-	}
-
-	// Set DNS options. Maintain a resolv.conf for the sandbox.
-	var err error
-	resolvContent := ""
-	if dnsConfig := config.GetDnsConfig(); dnsConfig != nil {
-		resolvContent, err = parseDNSOptions(dnsConfig.Servers, dnsConfig.Searches, dnsConfig.Options)
-		if err != nil {
-			return fmt.Errorf("failed to parse sandbox DNSConfig %+v: %w", dnsConfig, err)
-		}
-	}
-	resolvPath := c.getResolvPath(id)
-	if resolvContent == "" {
-		// copy host's resolv.conf to resolvPath
-		err = c.os.CopyFile(resolvConfPath, resolvPath, 0644)
-		if err != nil {
-			return fmt.Errorf("failed to copy host's resolv.conf to %q: %w", resolvPath, err)
-		}
-	} else {
-		err = c.os.WriteFile(resolvPath, []byte(resolvContent), 0644)
-		if err != nil {
-			return fmt.Errorf("failed to write resolv content to %q: %w", resolvPath, err)
-		}
-	}
-
-	// Setup sandbox /dev/shm.
-	if config.GetLinux().GetSecurityContext().GetNamespaceOptions().GetIpc() == runtime.NamespaceMode_NODE {
-		if _, err := c.os.Stat(devShm); err != nil {
-			return fmt.Errorf("host %q is not available for host ipc: %w", devShm, err)
-		}
-	} else {
-		sandboxDevShm := c.getSandboxDevShm(id)
-		if err := c.os.MkdirAll(sandboxDevShm, 0700); err != nil {
-			return fmt.Errorf("failed to create sandbox shm: %w", err)
-		}
-		shmproperty := fmt.Sprintf("mode=1777,size=%d", defaultShmSize)
-		if err := c.os.(osinterface.UNIX).Mount("shm", sandboxDevShm, "tmpfs", uintptr(unix.MS_NOEXEC|unix.MS_NOSUID|unix.MS_NODEV), shmproperty); err != nil {
-			return fmt.Errorf("failed to mount sandbox shm: %w", err)
-		}
-	}
-
-	return nil
-}
-
-// parseDNSOptions parse DNS options into resolv.conf format content,
-// if none option is specified, will return empty with no error.
-func parseDNSOptions(servers, searches, options []string) (string, error) {
-	resolvContent := ""
-
-	if len(searches) > 0 {
-		resolvContent += fmt.Sprintf("search %s\n", strings.Join(searches, " "))
-	}
-
-	if len(servers) > 0 {
-		resolvContent += fmt.Sprintf("nameserver %s\n", strings.Join(servers, "\nnameserver "))
-	}
-
-	if len(options) > 0 {
-		resolvContent += fmt.Sprintf("options %s\n", strings.Join(options, " "))
-	}
-
-	return resolvContent, nil
-}
-
 // cleanupSandboxFiles unmount some sandbox files, we rely on the removal of sandbox root directory to
 // remove these files. Unmount should *NOT* return error if the mount point is already unmounted.
 func (c *criService) cleanupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {

pkg/cri/sbserver/sandbox_run_other.go

@@ -21,29 +21,9 @@ package sbserver
 
 import (
 	"github.com/containerd/containerd"
-	"github.com/containerd/containerd/oci"
-	imagespec "github.com/opencontainers/image-spec/specs-go/v1"
-	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
 	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
 )
 
-func (c *criService) sandboxContainerSpec(id string, config *runtime.PodSandboxConfig,
-	imageConfig *imagespec.ImageConfig, nsPath string, runtimePodAnnotations []string) (_ *runtimespec.Spec, retErr error) {
-	return c.runtimeSpec(id, "")
-}
-
-// sandboxContainerSpecOpts generates OCI spec options for
-// the sandbox container.
-func (c *criService) sandboxContainerSpecOpts(config *runtime.PodSandboxConfig, imageConfig *imagespec.ImageConfig) ([]oci.SpecOpts, error) {
-	return []oci.SpecOpts{}, nil
-}
-
-// setupSandboxFiles sets up necessary sandbox files including /dev/shm, /etc/hosts,
-// /etc/resolv.conf and /etc/hostname.
-func (c *criService) setupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {
-	return nil
-}
-
 // cleanupSandboxFiles unmount some sandbox files, we rely on the removal of sandbox root directory to
 // remove these files. Unmount should *NOT* return error if the mount point is already unmounted.
 func (c *criService) cleanupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {

pkg/cri/sbserver/sandbox_run_test.go

@@ -19,152 +19,13 @@ package sbserver
 import (
 	"context"
 	"net"
-	goruntime "runtime"
 	"testing"
 
 	"github.com/containerd/go-cni"
-	"github.com/containerd/typeurl"
-	imagespec "github.com/opencontainers/image-spec/specs-go/v1"
-	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/stretchr/testify/assert"
 	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
-
-	"github.com/containerd/containerd/pkg/cri/annotations"
-	criconfig "github.com/containerd/containerd/pkg/cri/config"
-	sandboxstore "github.com/containerd/containerd/pkg/cri/store/sandbox"
 )
 
-func TestSandboxContainerSpec(t *testing.T) {
-	switch goruntime.GOOS {
-	case "darwin":
-		t.Skip("not implemented on Darwin")
-	case "freebsd":
-		t.Skip("not implemented on FreeBSD")
-	}
-	testID := "test-id"
-	nsPath := "test-cni"
-	for desc, test := range map[string]struct {
-		configChange      func(*runtime.PodSandboxConfig)
-		podAnnotations    []string
-		imageConfigChange func(*imagespec.ImageConfig)
-		specCheck         func(*testing.T, *runtimespec.Spec)
-		expectErr         bool
-	}{
-		"should return error when entrypoint and cmd are empty": {
-			imageConfigChange: func(c *imagespec.ImageConfig) {
-				c.Entrypoint = nil
-				c.Cmd = nil
-			},
-			expectErr: true,
-		},
-		"a passthrough annotation should be passed as an OCI annotation": {
-			podAnnotations: []string{"c"},
-			specCheck: func(t *testing.T, spec *runtimespec.Spec) {
-				assert.Equal(t, spec.Annotations["c"], "d")
-			},
-		},
-		"a non-passthrough annotation should not be passed as an OCI annotation": {
-			configChange: func(c *runtime.PodSandboxConfig) {
-				c.Annotations["d"] = "e"
-			},
-			podAnnotations: []string{"c"},
-			specCheck: func(t *testing.T, spec *runtimespec.Spec) {
-				assert.Equal(t, spec.Annotations["c"], "d")
-				_, ok := spec.Annotations["d"]
-				assert.False(t, ok)
-			},
-		},
-		"passthrough annotations should support wildcard match": {
-			configChange: func(c *runtime.PodSandboxConfig) {
-				c.Annotations["t.f"] = "j"
-				c.Annotations["z.g"] = "o"
-				c.Annotations["z"] = "o"
-				c.Annotations["y.ca"] = "b"
-				c.Annotations["y"] = "b"
-			},
-			podAnnotations: []string{"t*", "z.*", "y.c*"},
-			specCheck: func(t *testing.T, spec *runtimespec.Spec) {
-				assert.Equal(t, spec.Annotations["t.f"], "j")
-				assert.Equal(t, spec.Annotations["z.g"], "o")
-				assert.Equal(t, spec.Annotations["y.ca"], "b")
-				_, ok := spec.Annotations["y"]
-				assert.False(t, ok)
-				_, ok = spec.Annotations["z"]
-				assert.False(t, ok)
-			},
-		},
-	} {
-		t.Run(desc, func(t *testing.T) {
-			c := newTestCRIService()
-			config, imageConfig, specCheck := getRunPodSandboxTestData()
-			if test.configChange != nil {
-				test.configChange(config)
-			}
-
-			if test.imageConfigChange != nil {
-				test.imageConfigChange(imageConfig)
-			}
-			spec, err := c.sandboxContainerSpec(testID, config, imageConfig, nsPath,
-				test.podAnnotations)
-			if test.expectErr {
-				assert.Error(t, err)
-				assert.Nil(t, spec)
-				return
-			}
-			assert.NoError(t, err)
-			assert.NotNil(t, spec)
-			specCheck(t, testID, spec)
-			if test.specCheck != nil {
-				test.specCheck(t, spec)
-			}
-		})
-	}
-}
-
-func TestTypeurlMarshalUnmarshalSandboxMeta(t *testing.T) {
-	for desc, test := range map[string]struct {
-		configChange func(*runtime.PodSandboxConfig)
-	}{
-		"should marshal original config": {},
-		"should marshal Linux": {
-			configChange: func(c *runtime.PodSandboxConfig) {
-				if c.Linux == nil {
-					c.Linux = &runtime.LinuxPodSandboxConfig{}
-				}
-				c.Linux.SecurityContext = &runtime.LinuxSandboxSecurityContext{
-					NamespaceOptions: &runtime.NamespaceOption{
-						Network: runtime.NamespaceMode_NODE,
-						Pid:     runtime.NamespaceMode_NODE,
-						Ipc:     runtime.NamespaceMode_NODE,
-					},
-					SupplementalGroups: []int64{1111, 2222},
-				}
-			},
-		},
-	} {
-		t.Run(desc, func(t *testing.T) {
-			meta := &sandboxstore.Metadata{
-				ID:        "1",
-				Name:      "sandbox_1",
-				NetNSPath: "/home/cloud",
-			}
-			meta.Config, _, _ = getRunPodSandboxTestData()
-			if test.configChange != nil {
-				test.configChange(meta.Config)
-			}
-
-			any, err := typeurl.MarshalAny(meta)
-			assert.NoError(t, err)
-			data, err := typeurl.UnmarshalAny(any)
-			assert.NoError(t, err)
-			assert.IsType(t, &sandboxstore.Metadata{}, data)
-			curMeta, ok := data.(*sandboxstore.Metadata)
-			assert.True(t, ok)
-			assert.Equal(t, meta, curMeta)
-		})
-	}
-}
-
 func TestToCNIPortMappings(t *testing.T) {
 	for desc, test := range map[string]struct {
 		criPortMappings []*runtime.PortMapping
@@ -315,212 +176,3 @@ func TestSelectPodIP(t *testing.T) {
 		})
 	}
 }
-
-func TestHostAccessingSandbox(t *testing.T) {
-	privilegedContext := &runtime.PodSandboxConfig{
-		Linux: &runtime.LinuxPodSandboxConfig{
-			SecurityContext: &runtime.LinuxSandboxSecurityContext{
-				Privileged: true,
-			},
-		},
-	}
-	nonPrivilegedContext := &runtime.PodSandboxConfig{
-		Linux: &runtime.LinuxPodSandboxConfig{
-			SecurityContext: &runtime.LinuxSandboxSecurityContext{
-				Privileged: false,
-			},
-		},
-	}
-	hostNamespace := &runtime.PodSandboxConfig{
-		Linux: &runtime.LinuxPodSandboxConfig{
-			SecurityContext: &runtime.LinuxSandboxSecurityContext{
-				Privileged: false,
-				NamespaceOptions: &runtime.NamespaceOption{
-					Network: runtime.NamespaceMode_NODE,
-					Pid:     runtime.NamespaceMode_NODE,
-					Ipc:     runtime.NamespaceMode_NODE,
-				},
-			},
-		},
-	}
-	tests := []struct {
-		name   string
-		config *runtime.PodSandboxConfig
-		want   bool
-	}{
-		{"Security Context is nil", nil, false},
-		{"Security Context is privileged", privilegedContext, false},
-		{"Security Context is not privileged", nonPrivilegedContext, false},
-		{"Security Context namespace host access", hostNamespace, true},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			if got := hostAccessingSandbox(tt.config); got != tt.want {
-				t.Errorf("hostAccessingSandbox() = %v, want %v", got, tt.want)
-			}
-		})
-	}
-}
-
-func TestGetSandboxRuntime(t *testing.T) {
-	untrustedWorkloadRuntime := criconfig.Runtime{
-		Type:   "io.containerd.runtime.v1.linux",
-		Engine: "untrusted-workload-runtime",
-		Root:   "",
-	}
-
-	defaultRuntime := criconfig.Runtime{
-		Type:   "io.containerd.runtime.v1.linux",
-		Engine: "default-runtime",
-		Root:   "",
-	}
-
-	fooRuntime := criconfig.Runtime{
-		Type:   "io.containerd.runtime.v1.linux",
-		Engine: "foo-bar",
-		Root:   "",
-	}
-
-	for desc, test := range map[string]struct {
-		sandboxConfig   *runtime.PodSandboxConfig
-		runtimeHandler  string
-		runtimes        map[string]criconfig.Runtime
-		expectErr       bool
-		expectedRuntime criconfig.Runtime
-	}{
-		"should return error if untrusted workload requires host access": {
-			sandboxConfig: &runtime.PodSandboxConfig{
-				Linux: &runtime.LinuxPodSandboxConfig{
-					SecurityContext: &runtime.LinuxSandboxSecurityContext{
-						Privileged: false,
-						NamespaceOptions: &runtime.NamespaceOption{
-							Network: runtime.NamespaceMode_NODE,
-							Pid:     runtime.NamespaceMode_NODE,
-							Ipc:     runtime.NamespaceMode_NODE,
-						},
-					},
-				},
-				Annotations: map[string]string{
-					annotations.UntrustedWorkload: "true",
-				},
-			},
-			runtimes: map[string]criconfig.Runtime{
-				criconfig.RuntimeDefault:   defaultRuntime,
-				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
-			},
-			expectErr: true,
-		},
-		"should use untrusted workload runtime for untrusted workload": {
-			sandboxConfig: &runtime.PodSandboxConfig{
-				Annotations: map[string]string{
-					annotations.UntrustedWorkload: "true",
-				},
-			},
-			runtimes: map[string]criconfig.Runtime{
-				criconfig.RuntimeDefault:   defaultRuntime,
-				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
-			},
-			expectedRuntime: untrustedWorkloadRuntime,
-		},
-		"should use default runtime for regular workload": {
-			sandboxConfig: &runtime.PodSandboxConfig{},
-			runtimes: map[string]criconfig.Runtime{
-				criconfig.RuntimeDefault: defaultRuntime,
-			},
-			expectedRuntime: defaultRuntime,
-		},
-		"should use default runtime for trusted workload": {
-			sandboxConfig: &runtime.PodSandboxConfig{
-				Annotations: map[string]string{
-					annotations.UntrustedWorkload: "false",
-				},
-			},
-			runtimes: map[string]criconfig.Runtime{
-				criconfig.RuntimeDefault:   defaultRuntime,
-				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
-			},
-			expectedRuntime: defaultRuntime,
-		},
-		"should return error if untrusted workload runtime is required but not configured": {
-			sandboxConfig: &runtime.PodSandboxConfig{
-				Annotations: map[string]string{
-					annotations.UntrustedWorkload: "true",
-				},
-			},
-			runtimes: map[string]criconfig.Runtime{
-				criconfig.RuntimeDefault: defaultRuntime,
-			},
-			expectErr: true,
-		},
-		"should use 'untrusted' runtime for untrusted workload": {
-			sandboxConfig: &runtime.PodSandboxConfig{
-				Annotations: map[string]string{
-					annotations.UntrustedWorkload: "true",
-				},
-			},
-			runtimes: map[string]criconfig.Runtime{
-				criconfig.RuntimeDefault:   defaultRuntime,
-				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
-			},
-			expectedRuntime: untrustedWorkloadRuntime,
-		},
-		"should use 'untrusted' runtime for untrusted workload & handler": {
-			sandboxConfig: &runtime.PodSandboxConfig{
-				Annotations: map[string]string{
-					annotations.UntrustedWorkload: "true",
-				},
-			},
-			runtimeHandler: "untrusted",
-			runtimes: map[string]criconfig.Runtime{
-				criconfig.RuntimeDefault:   defaultRuntime,
-				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
-			},
-			expectedRuntime: untrustedWorkloadRuntime,
-		},
-		"should return an error if untrusted annotation with conflicting handler": {
-			sandboxConfig: &runtime.PodSandboxConfig{
-				Annotations: map[string]string{
-					annotations.UntrustedWorkload: "true",
-				},
-			},
-			runtimeHandler: "foo",
-			runtimes: map[string]criconfig.Runtime{
-				criconfig.RuntimeDefault:   defaultRuntime,
-				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
-				"foo":                      fooRuntime,
-			},
-			expectErr: true,
-		},
-		"should use correct runtime for a runtime handler": {
-			sandboxConfig:  &runtime.PodSandboxConfig{},
-			runtimeHandler: "foo",
-			runtimes: map[string]criconfig.Runtime{
-				criconfig.RuntimeDefault:   defaultRuntime,
-				criconfig.RuntimeUntrusted: untrustedWorkloadRuntime,
-				"foo":                      fooRuntime,
-			},
-			expectedRuntime: fooRuntime,
-		},
-		"should return error if runtime handler is required but not configured": {
-			sandboxConfig:  &runtime.PodSandboxConfig{},
-			runtimeHandler: "bar",
-			runtimes: map[string]criconfig.Runtime{
-				criconfig.RuntimeDefault: defaultRuntime,
-				"foo":                    fooRuntime,
-			},
-			expectErr: true,
-		},
-	} {
-		t.Run(desc, func(t *testing.T) {
-			cri := newTestCRIService()
-			cri.config = criconfig.Config{
-				PluginConfig: criconfig.DefaultConfig(),
-			}
-			cri.config.ContainerdConfig.DefaultRuntimeName = criconfig.RuntimeDefault
-			cri.config.ContainerdConfig.Runtimes = test.runtimes
-			r, err := cri.getSandboxRuntime(test.sandboxConfig, test.runtimeHandler)
-			assert.Equal(t, test.expectErr, err != nil)
-			assert.Equal(t, test.expectedRuntime, r)
-		})
-	}
-}

pkg/cri/sbserver/sandbox_run_windows.go

@@ -17,91 +17,10 @@
 package sbserver
 
 import (
-	"fmt"
-	"strconv"
-
 	"github.com/containerd/containerd"
-	"github.com/containerd/containerd/oci"
-	imagespec "github.com/opencontainers/image-spec/specs-go/v1"
-	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
 	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
-
-	"github.com/containerd/containerd/pkg/cri/annotations"
-	customopts "github.com/containerd/containerd/pkg/cri/opts"
 )
 
-func (c *criService) sandboxContainerSpec(id string, config *runtime.PodSandboxConfig,
-	imageConfig *imagespec.ImageConfig, nsPath string, runtimePodAnnotations []string) (*runtimespec.Spec, error) {
-	// Creates a spec Generator with the default spec.
-	specOpts := []oci.SpecOpts{
-		oci.WithEnv(imageConfig.Env),
-		oci.WithHostname(config.GetHostname()),
-	}
-	if imageConfig.WorkingDir != "" {
-		specOpts = append(specOpts, oci.WithProcessCwd(imageConfig.WorkingDir))
-	}
-
-	if len(imageConfig.Entrypoint) == 0 && len(imageConfig.Cmd) == 0 {
-		// Pause image must have entrypoint or cmd.
-		return nil, fmt.Errorf("invalid empty entrypoint and cmd in image config %+v", imageConfig)
-	}
-	specOpts = append(specOpts, oci.WithProcessArgs(append(imageConfig.Entrypoint, imageConfig.Cmd...)...))
-
-	specOpts = append(specOpts,
-		// Clear the root location since hcsshim expects it.
-		// NOTE: readonly rootfs doesn't work on windows.
-		customopts.WithoutRoot,
-		customopts.WithWindowsNetworkNamespace(nsPath),
-	)
-
-	specOpts = append(specOpts, customopts.WithWindowsDefaultSandboxShares)
-
-	// Start with the image config user and override below if RunAsUsername is not "".
-	username := imageConfig.User
-
-	runAsUser := config.GetWindows().GetSecurityContext().GetRunAsUsername()
-	if runAsUser != "" {
-		username = runAsUser
-	}
-
-	cs := config.GetWindows().GetSecurityContext().GetCredentialSpec()
-	if cs != "" {
-		specOpts = append(specOpts, customopts.WithWindowsCredentialSpec(cs))
-	}
-
-	// There really isn't a good Windows way to verify that the username is available in the
-	// image as early as here like there is for Linux. Later on in the stack hcsshim
-	// will handle the behavior of erroring out if the user isn't available in the image
-	// when trying to run the init process.
-	specOpts = append(specOpts, oci.WithUser(username))
-
-	for pKey, pValue := range getPassthroughAnnotations(config.Annotations,
-		runtimePodAnnotations) {
-		specOpts = append(specOpts, customopts.WithAnnotation(pKey, pValue))
-	}
-
-	specOpts = append(specOpts,
-		customopts.WithAnnotation(annotations.ContainerType, annotations.ContainerTypeSandbox),
-		customopts.WithAnnotation(annotations.SandboxID, id),
-		customopts.WithAnnotation(annotations.SandboxNamespace, config.GetMetadata().GetNamespace()),
-		customopts.WithAnnotation(annotations.SandboxName, config.GetMetadata().GetName()),
-		customopts.WithAnnotation(annotations.SandboxLogDir, config.GetLogDirectory()),
-		customopts.WithAnnotation(annotations.WindowsHostProcess, strconv.FormatBool(config.GetWindows().GetSecurityContext().GetHostProcess())),
-	)
-
-	return c.runtimeSpec(id, "", specOpts...)
-}
-
-// No sandbox container spec options for windows yet.
-func (c *criService) sandboxContainerSpecOpts(config *runtime.PodSandboxConfig, imageConfig *imagespec.ImageConfig) ([]oci.SpecOpts, error) {
-	return nil, nil
-}
-
-// No sandbox files needed for windows.
-func (c *criService) setupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {
-	return nil
-}
-
 // No sandbox files needed for windows.
 func (c *criService) cleanupSandboxFiles(id string, config *runtime.PodSandboxConfig) error {
 	return nil

pkg/cri/sbserver/service.go

@@ -17,6 +17,7 @@
 package sbserver
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -28,9 +29,11 @@ import (
 
 	"github.com/containerd/containerd"
 	"github.com/containerd/containerd/oci"
+	"github.com/containerd/containerd/pkg/cri/sbserver/podsandbox"
 	"github.com/containerd/containerd/pkg/cri/streaming"
 	"github.com/containerd/containerd/pkg/kmutex"
 	"github.com/containerd/containerd/plugin"
+	"github.com/containerd/containerd/sandbox"
 	"github.com/containerd/go-cni"
 	"github.com/sirupsen/logrus"
 	"google.golang.org/grpc"
@@ -88,6 +91,8 @@ type criService struct {
 	sandboxNameIndex *registrar.Registrar
 	// containerStore stores all resources associated with containers.
 	containerStore *containerstore.Store
+	// sandboxController controls sandbox lifecycle (and hides implementation details behind).
+	sandboxController sandbox.Controller
 	// containerNameIndex stores all container names and make sure each
 	// name is unique.
 	containerNameIndex *registrar.Registrar
@@ -181,9 +186,17 @@ func NewCRIService(config criconfig.Config, client *containerd.Client) (CRIServi
 		return nil, err
 	}
 
+	c.sandboxController = podsandbox.New(config, client, c.sandboxStore, c.os, c, c.baseOCISpecs)
+
 	return c, nil
 }
 
+// StartSandboxExitMonitor is a temporary workaround to call monitor from pause controller.
+// TODO: get rid of this.
+func (c *criService) StartSandboxExitMonitor(ctx context.Context, id string, pid uint32, exitCh <-chan containerd.ExitStatus) <-chan struct{} {
+	return c.eventMonitor.startSandboxExitMonitor(ctx, id, pid, exitCh)
+}
+
 // Register registers all required services onto a specific grpc server.
 // This is used by containerd cri plugin.
 func (c *criService) Register(s *grpc.Server) error {

sandbox.go

@@ -82,12 +82,12 @@ func (s *sandboxClient) Labels(ctx context.Context) (map[string]string, error) {
 }
 
 func (s *sandboxClient) Start(ctx context.Context) error {
-	pid, err := s.client.SandboxController().Start(ctx, s.ID())
+	resp, err := s.client.SandboxController().Start(ctx, s.ID())
 	if err != nil {
 		return err
 	}
 
-	s.pid = &pid
+	s.pid = &resp.Pid
 	return nil
 }
 
@@ -115,10 +115,16 @@ func (s *sandboxClient) Wait(ctx context.Context) (<-chan ExitStatus, error) {
 }
 
 func (s *sandboxClient) Stop(ctx context.Context) error {
-	return s.client.SandboxController().Shutdown(ctx, s.ID())
+	if _, err := s.client.SandboxController().Stop(ctx, s.ID()); err != nil {
+		return err
+	}
+	return nil
 }
 
 func (s *sandboxClient) Delete(ctx context.Context) error {
+	if _, err := s.client.SandboxController().Delete(ctx, s.ID()); err != nil {
+		return err
+	}
 	return s.client.SandboxStore().Delete(ctx, s.ID())
 }
 

sandbox/controller.go

@@ -30,12 +30,14 @@ type Controller interface {
 	// containerd will run new shim runtime instance and will invoke Start to create a sandbox process.
 	// This routine must be invoked before scheduling containers on this instance.
 	// Once started clients may run containers via Task service (additionally specifying sandbox id the container will belong to).
-	Start(ctx context.Context, sandboxID string) (uint32, error)
+	Start(ctx context.Context, sandboxID string) (*sandbox.ControllerStartResponse, error)
-	// Shutdown deletes and cleans all tasks and sandbox instance.
+	// Stop will stop sandbox intances
-	Shutdown(ctx context.Context, sandboxID string) error
+	Stop(ctx context.Context, sandboxID string) (*sandbox.ControllerStopResponse, error)
 	// Wait blocks until sandbox process exits.
 	Wait(ctx context.Context, sandboxID string) (*sandbox.ControllerWaitResponse, 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) (*sandbox.ControllerStatusResponse, error)
+	// Delete deletes and cleans all tasks and sandbox instance.
+	Delete(ctx context.Context, sandboxID string) (*sandbox.ControllerDeleteResponse, error)
 }

sandbox/store.go

@@ -18,8 +18,10 @@ package sandbox
 
 import (
 	"context"
+	"fmt"
 	"time"
 
+	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/typeurl"
 )
 
@@ -64,3 +66,51 @@ type Store interface {
 	// Delete a sandbox from metadata store using the id
 	Delete(ctx context.Context, id string) error
 }
+
+// AddExtension is a helper function to add sandbox metadata extension.
+func (s *Sandbox) AddExtension(name string, obj interface{}) error {
+	if s.Extensions == nil {
+		s.Extensions = map[string]typeurl.Any{}
+	}
+
+	out, err := typeurl.MarshalAny(obj)
+	if err != nil {
+		return fmt.Errorf("failed to marshal sandbox extension %q: %w", name, err)
+	}
+
+	s.Extensions[name] = out
+	return nil
+}
+
+// AddLabel adds a label to sandbox's labels.
+func (s *Sandbox) AddLabel(name string, value string) {
+	if s.Labels == nil {
+		s.Labels = map[string]string{}
+	}
+
+	s.Labels[name] = value
+}
+
+// GetExtension retrieves a sandbox extension by name.
+func (s *Sandbox) GetExtension(name string, obj interface{}) error {
+	out, ok := s.Extensions[name]
+	if !ok {
+		return errdefs.ErrNotFound
+	}
+
+	if err := typeurl.UnmarshalTo(out, obj); err != nil {
+		return fmt.Errorf("failed to unmarshal sandbox extension %q: %w", name, err)
+	}
+
+	return nil
+}
+
+// GetLabel retrieves a sandbox label by name.
+func (s *Sandbox) GetLabel(name string) (string, error) {
+	out, ok := s.Labels[name]
+	if !ok {
+		return "", fmt.Errorf("unable to find label %q in sandbox metadata: %w", name, errdefs.ErrNotFound)
+	}
+
+	return out, nil
+}

sandbox/store_test.go

@@ -0,0 +1,40 @@
+/*
+   Copyright The containerd 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 sandbox
+
+import (
+	"testing"
+
+	"github.com/containerd/typeurl"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAddExtension(t *testing.T) {
+	sb := Sandbox{ID: "1"}
+
+	type test struct{ Name string }
+
+	typeurl.Register(&test{})
+
+	var in = test{Name: "test"}
+	assert.NoError(t, sb.AddExtension("test", &in))
+
+	var out test
+	err := sb.GetExtension("test", &out)
+	assert.NoError(t, err)
+	assert.Equal(t, "test", out.Name)
+}

sandbox_controller.go

@@ -36,22 +36,31 @@ func NewSandboxRemoteController(client api.ControllerClient) sb.Controller {
 	return &sandboxRemoteController{client: client}
 }
 
-func (s *sandboxRemoteController) Start(ctx context.Context, sandboxID string) (uint32, error) {
+func (s *sandboxRemoteController) Start(ctx context.Context, sandboxID string) (*api.ControllerStartResponse, error) {
 	resp, err := s.client.Start(ctx, &api.ControllerStartRequest{SandboxID: sandboxID})
 	if err != nil {
-		return 0, errdefs.FromGRPC(err)
+		return nil, errdefs.FromGRPC(err)
 	}
 
-	return resp.Pid, nil
+	return resp, nil
 }
 
-func (s *sandboxRemoteController) Shutdown(ctx context.Context, sandboxID string) error {
+func (s *sandboxRemoteController) Stop(ctx context.Context, sandboxID string) (*api.ControllerStopResponse, error) {
-	_, err := s.client.Shutdown(ctx, &api.ControllerShutdownRequest{SandboxID: sandboxID})
+	resp, err := s.client.Stop(ctx, &api.ControllerStopRequest{SandboxID: sandboxID})
 	if err != nil {
-		return errdefs.FromGRPC(err)
+		return nil, errdefs.FromGRPC(err)
 	}
 
-	return nil
+	return resp, nil
+}
+
+func (s *sandboxRemoteController) Delete(ctx context.Context, sandboxID string) (*api.ControllerDeleteResponse, error) {
+	resp, err := s.client.Delete(ctx, &api.ControllerDeleteRequest{SandboxID: sandboxID})
+	if err != nil {
+		return nil, errdefs.FromGRPC(err)
+	}
+
+	return resp, nil
 }
 
 func (s *sandboxRemoteController) Wait(ctx context.Context, sandboxID string) (*api.ControllerWaitResponse, error) {

services.go

@@ -24,7 +24,7 @@ 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"
-	sandboxsapi "github.com/containerd/containerd/api/services/sandbox/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"
@@ -165,14 +165,14 @@ func WithIntrospectionService(in introspection.Service) ServicesOpt {
 }
 
 // WithSandboxStore sets the sandbox store.
-func WithSandboxStore(client sandboxsapi.StoreClient) ServicesOpt {
+func WithSandboxStore(client sandboxapi.StoreClient) ServicesOpt {
 	return func(s *services) {
 		s.sandboxStore = NewRemoteSandboxStore(client)
 	}
 }
 
 // WithSandboxController sets the sandbox controller.
-func WithSandboxController(client sandboxsapi.ControllerClient) ServicesOpt {
+func WithSandboxController(client sandboxapi.ControllerClient) ServicesOpt {
 	return func(s *services) {
 		s.sandboxController = NewSandboxRemoteController(client)
 	}
@@ -227,6 +227,12 @@ func WithInMemoryServices(ic *plugin.InitContext) ClientOpt {
 			srv.IntrospectionService: func(s interface{}) ServicesOpt {
 				return WithIntrospectionClient(s.(introspectionapi.IntrospectionClient))
 			},
+			srv.SandboxStoreService: func(s interface{}) ServicesOpt {
+				return WithSandboxStore(s.(sandboxapi.StoreClient))
+			},
+			srv.SandboxControllerService: func(s interface{}) ServicesOpt {
+				return WithSandboxController(s.(sandboxapi.ControllerClient))
+			},
 		} {
 			p := plugins[s]
 			if p == nil {

services/sandbox/controller_local.go

@@ -123,7 +123,7 @@ func (c *controllerLocal) Start(ctx context.Context, in *api.ControllerStartRequ
 	}, nil
 }
 
-func (c *controllerLocal) Shutdown(ctx context.Context, in *api.ControllerShutdownRequest, opts ...grpc.CallOption) (*api.ControllerShutdownResponse, error) {
+func (c *controllerLocal) Stop(ctx context.Context, in *api.ControllerStopRequest, opts ...grpc.CallOption) (*api.ControllerStopResponse, error) {
 	svc, err := c.getSandbox(ctx, in.SandboxID)
 	if err != nil {
 		return nil, err
@@ -136,11 +136,15 @@ func (c *controllerLocal) Shutdown(ctx context.Context, in *api.ControllerShutdo
 		return nil, fmt.Errorf("failed to stop sandbox: %w", err)
 	}
 
+	return &api.ControllerStopResponse{}, nil
+}
+
+func (c *controllerLocal) Delete(ctx context.Context, in *api.ControllerDeleteRequest, opts ...grpc.CallOption) (*api.ControllerDeleteResponse, error) {
 	if err := c.shims.Delete(ctx, in.SandboxID); err != nil {
 		return nil, fmt.Errorf("failed to delete sandbox shim: %w", err)
 	}
 
-	return &api.ControllerShutdownResponse{}, nil
+	return &api.ControllerDeleteResponse{}, nil
 }
 
 func (c *controllerLocal) Wait(ctx context.Context, in *api.ControllerWaitRequest, opts ...grpc.CallOption) (*api.ControllerWaitResponse, error) {

services/sandbox/controller_service.go

@@ -74,9 +74,9 @@ func (s *controllerService) Start(ctx context.Context, req *api.ControllerStartR
 	return s.local.Start(ctx, req)
 }
 
-func (s *controllerService) Shutdown(ctx context.Context, req *api.ControllerShutdownRequest) (*api.ControllerShutdownResponse, error) {
+func (s *controllerService) Stop(ctx context.Context, req *api.ControllerStopRequest) (*api.ControllerStopResponse, error) {
 	log.G(ctx).WithField("req", req).Debug("delete sandbox")
-	return s.local.Shutdown(ctx, req)
+	return s.local.Stop(ctx, req)
 }
 
 func (s *controllerService) Wait(ctx context.Context, req *api.ControllerWaitRequest) (*api.ControllerWaitResponse, error) {
@@ -88,3 +88,8 @@ func (s *controllerService) Status(ctx context.Context, req *api.ControllerStatu
 	log.G(ctx).WithField("req", req).Debug("sandbox status")
 	return s.local.Status(ctx, req)
 }
+
+func (s *controllerService) Delete(ctx context.Context, req *api.ControllerDeleteRequest) (*api.ControllerDeleteResponse, error) {
+	log.G(ctx).WithField("req", req).Debug("delete sandbox")
+	return s.local.Delete(ctx, req)
+}