multi-observer aware load balancer strategy

app/router/config.pb.go

@@ -132,7 +132,7 @@ func (x Config_DomainStrategy) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use Config_DomainStrategy.Descriptor instead.
 func (Config_DomainStrategy) EnumDescriptor() ([]byte, []int) {
-	return file_app_router_config_proto_rawDescGZIP(), []int{10, 0}
+	return file_app_router_config_proto_rawDescGZIP(), []int{11, 0}
 }
 
 // Domain for routing decision.
@@ -844,6 +844,53 @@ func (x *StrategyWeight) GetValue() float32 {
 	return 0
 }
 
+type StrategyLeastPingConfig struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	ObserverTag string `protobuf:"bytes,7,opt,name=observer_tag,json=observerTag,proto3" json:"observer_tag,omitempty"`
+}
+
+func (x *StrategyLeastPingConfig) Reset() {
+	*x = StrategyLeastPingConfig{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_router_config_proto_msgTypes[9]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *StrategyLeastPingConfig) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*StrategyLeastPingConfig) ProtoMessage() {}
+
+func (x *StrategyLeastPingConfig) ProtoReflect() protoreflect.Message {
+	mi := &file_app_router_config_proto_msgTypes[9]
+	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 StrategyLeastPingConfig.ProtoReflect.Descriptor instead.
+func (*StrategyLeastPingConfig) Descriptor() ([]byte, []int) {
+	return file_app_router_config_proto_rawDescGZIP(), []int{9}
+}
+
+func (x *StrategyLeastPingConfig) GetObserverTag() string {
+	if x != nil {
+		return x.ObserverTag
+	}
+	return ""
+}
+
 type StrategyLeastLoadConfig struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -858,13 +905,14 @@ type StrategyLeastLoadConfig struct {
 	// max acceptable rtt, filter away high delay nodes. defalut 0
 	MaxRTT int64 `protobuf:"varint,5,opt,name=maxRTT,proto3" json:"maxRTT,omitempty"`
 	// acceptable failure rate
-	Tolerance float32 `protobuf:"fixed32,6,opt,name=tolerance,proto3" json:"tolerance,omitempty"`
+	Tolerance   float32 `protobuf:"fixed32,6,opt,name=tolerance,proto3" json:"tolerance,omitempty"`
+	ObserverTag string  `protobuf:"bytes,7,opt,name=observer_tag,json=observerTag,proto3" json:"observer_tag,omitempty"`
 }
 
 func (x *StrategyLeastLoadConfig) Reset() {
 	*x = StrategyLeastLoadConfig{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_app_router_config_proto_msgTypes[9]
+		mi := &file_app_router_config_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -877,7 +925,7 @@ func (x *StrategyLeastLoadConfig) String() string {
 func (*StrategyLeastLoadConfig) ProtoMessage() {}
 
 func (x *StrategyLeastLoadConfig) ProtoReflect() protoreflect.Message {
-	mi := &file_app_router_config_proto_msgTypes[9]
+	mi := &file_app_router_config_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -890,7 +938,7 @@ func (x *StrategyLeastLoadConfig) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use StrategyLeastLoadConfig.ProtoReflect.Descriptor instead.
 func (*StrategyLeastLoadConfig) Descriptor() ([]byte, []int) {
-	return file_app_router_config_proto_rawDescGZIP(), []int{9}
+	return file_app_router_config_proto_rawDescGZIP(), []int{10}
 }
 
 func (x *StrategyLeastLoadConfig) GetCosts() []*StrategyWeight {
@@ -928,6 +976,13 @@ func (x *StrategyLeastLoadConfig) GetTolerance() float32 {
 	return 0
 }
 
+func (x *StrategyLeastLoadConfig) GetObserverTag() string {
+	if x != nil {
+		return x.ObserverTag
+	}
+	return ""
+}
+
 type Config struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -941,7 +996,7 @@ type Config struct {
 func (x *Config) Reset() {
 	*x = Config{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_app_router_config_proto_msgTypes[10]
+		mi := &file_app_router_config_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -954,7 +1009,7 @@ func (x *Config) String() string {
 func (*Config) ProtoMessage() {}
 
 func (x *Config) ProtoReflect() protoreflect.Message {
-	mi := &file_app_router_config_proto_msgTypes[10]
+	mi := &file_app_router_config_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -967,7 +1022,7 @@ func (x *Config) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Config.ProtoReflect.Descriptor instead.
 func (*Config) Descriptor() ([]byte, []int) {
-	return file_app_router_config_proto_rawDescGZIP(), []int{10}
+	return file_app_router_config_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *Config) GetDomainStrategy() Config_DomainStrategy {
@@ -1006,7 +1061,7 @@ type Domain_Attribute struct {
 func (x *Domain_Attribute) Reset() {
 	*x = Domain_Attribute{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_app_router_config_proto_msgTypes[11]
+		mi := &file_app_router_config_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1019,7 +1074,7 @@ func (x *Domain_Attribute) String() string {
 func (*Domain_Attribute) ProtoMessage() {}
 
 func (x *Domain_Attribute) ProtoReflect() protoreflect.Message {
-	mi := &file_app_router_config_proto_msgTypes[11]
+	mi := &file_app_router_config_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1211,45 +1266,51 @@ var file_app_router_config_proto_rawDesc = []byte{
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+	0x32, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x76, 0x34, 0x2f, 0x61, 0x70, 0x70,
+	0x2f, 0x72, 0x6f, 0x75, 0x74, 0x65, 0x72, 0xaa, 0x02, 0x15, 0x56, 0x32, 0x52, 0x61, 0x79, 0x2e,
+	0x43, 0x6f, 0x72, 0x65, 0x2e, 0x41, 0x70, 0x70, 0x2e, 0x52, 0x6f, 0x75, 0x74, 0x65, 0x72, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -1265,7 +1326,7 @@ func file_app_router_config_proto_rawDescGZIP() []byte {
 }
 
 var file_app_router_config_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
-var file_app_router_config_proto_msgTypes = make([]protoimpl.MessageInfo, 12)
+var file_app_router_config_proto_msgTypes = make([]protoimpl.MessageInfo, 13)
 var file_app_router_config_proto_goTypes = []interface{}{
 	(Domain_Type)(0),                // 0: v2ray.core.app.router.Domain.Type
 	(Config_DomainStrategy)(0),      // 1: v2ray.core.app.router.Config.DomainStrategy
@@ -1278,18 +1339,19 @@ var file_app_router_config_proto_goTypes = []interface{}{
 	(*RoutingRule)(nil),             // 8: v2ray.core.app.router.RoutingRule
 	(*BalancingRule)(nil),           // 9: v2ray.core.app.router.BalancingRule
 	(*StrategyWeight)(nil),          // 10: v2ray.core.app.router.StrategyWeight
-	(*StrategyLeastLoadConfig)(nil), // 11: v2ray.core.app.router.StrategyLeastLoadConfig
-	(*Config)(nil),                  // 12: v2ray.core.app.router.Config
-	(*Domain_Attribute)(nil),        // 13: v2ray.core.app.router.Domain.Attribute
-	(*net.PortRange)(nil),           // 14: v2ray.core.common.net.PortRange
-	(*net.PortList)(nil),            // 15: v2ray.core.common.net.PortList
-	(*net.NetworkList)(nil),         // 16: v2ray.core.common.net.NetworkList
-	(net.Network)(0),                // 17: v2ray.core.common.net.Network
-	(*serial.TypedMessage)(nil),     // 18: v2ray.core.common.serial.TypedMessage
+	(*StrategyLeastPingConfig)(nil), // 11: v2ray.core.app.router.StrategyLeastPingConfig
+	(*StrategyLeastLoadConfig)(nil), // 12: v2ray.core.app.router.StrategyLeastLoadConfig
+	(*Config)(nil),                  // 13: v2ray.core.app.router.Config
+	(*Domain_Attribute)(nil),        // 14: v2ray.core.app.router.Domain.Attribute
+	(*net.PortRange)(nil),           // 15: v2ray.core.common.net.PortRange
+	(*net.PortList)(nil),            // 16: v2ray.core.common.net.PortList
+	(*net.NetworkList)(nil),         // 17: v2ray.core.common.net.NetworkList
+	(net.Network)(0),                // 18: v2ray.core.common.net.Network
+	(*serial.TypedMessage)(nil),     // 19: v2ray.core.common.serial.TypedMessage
 }
 var file_app_router_config_proto_depIdxs = []int32{
 	0,  // 0: v2ray.core.app.router.Domain.type:type_name -> v2ray.core.app.router.Domain.Type
-	13, // 1: v2ray.core.app.router.Domain.attribute:type_name -> v2ray.core.app.router.Domain.Attribute
+	14, // 1: v2ray.core.app.router.Domain.attribute:type_name -> v2ray.core.app.router.Domain.Attribute
 	3,  // 2: v2ray.core.app.router.GeoIP.cidr:type_name -> v2ray.core.app.router.CIDR
 	4,  // 3: v2ray.core.app.router.GeoIPList.entry:type_name -> v2ray.core.app.router.GeoIP
 	2,  // 4: v2ray.core.app.router.GeoSite.domain:type_name -> v2ray.core.app.router.Domain
@@ -1297,14 +1359,14 @@ var file_app_router_config_proto_depIdxs = []int32{
 	2,  // 6: v2ray.core.app.router.RoutingRule.domain:type_name -> v2ray.core.app.router.Domain
 	3,  // 7: v2ray.core.app.router.RoutingRule.cidr:type_name -> v2ray.core.app.router.CIDR
 	4,  // 8: v2ray.core.app.router.RoutingRule.geoip:type_name -> v2ray.core.app.router.GeoIP
-	14, // 9: v2ray.core.app.router.RoutingRule.port_range:type_name -> v2ray.core.common.net.PortRange
-	15, // 10: v2ray.core.app.router.RoutingRule.port_list:type_name -> v2ray.core.common.net.PortList
-	16, // 11: v2ray.core.app.router.RoutingRule.network_list:type_name -> v2ray.core.common.net.NetworkList
-	17, // 12: v2ray.core.app.router.RoutingRule.networks:type_name -> v2ray.core.common.net.Network
+	15, // 9: v2ray.core.app.router.RoutingRule.port_range:type_name -> v2ray.core.common.net.PortRange
+	16, // 10: v2ray.core.app.router.RoutingRule.port_list:type_name -> v2ray.core.common.net.PortList
+	17, // 11: v2ray.core.app.router.RoutingRule.network_list:type_name -> v2ray.core.common.net.NetworkList
+	18, // 12: v2ray.core.app.router.RoutingRule.networks:type_name -> v2ray.core.common.net.Network
 	3,  // 13: v2ray.core.app.router.RoutingRule.source_cidr:type_name -> v2ray.core.app.router.CIDR
 	4,  // 14: v2ray.core.app.router.RoutingRule.source_geoip:type_name -> v2ray.core.app.router.GeoIP
-	15, // 15: v2ray.core.app.router.RoutingRule.source_port_list:type_name -> v2ray.core.common.net.PortList
-	18, // 16: v2ray.core.app.router.BalancingRule.strategy_settings:type_name -> v2ray.core.common.serial.TypedMessage
+	16, // 15: v2ray.core.app.router.RoutingRule.source_port_list:type_name -> v2ray.core.common.net.PortList
+	19, // 16: v2ray.core.app.router.BalancingRule.strategy_settings:type_name -> v2ray.core.common.serial.TypedMessage
 	10, // 17: v2ray.core.app.router.StrategyLeastLoadConfig.costs:type_name -> v2ray.core.app.router.StrategyWeight
 	1,  // 18: v2ray.core.app.router.Config.domain_strategy:type_name -> v2ray.core.app.router.Config.DomainStrategy
 	8,  // 19: v2ray.core.app.router.Config.rule:type_name -> v2ray.core.app.router.RoutingRule
@@ -1431,7 +1493,7 @@ func file_app_router_config_proto_init() {
 			}
 		}
 		file_app_router_config_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*StrategyLeastLoadConfig); i {
+			switch v := v.(*StrategyLeastPingConfig); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1443,7 +1505,7 @@ func file_app_router_config_proto_init() {
 			}
 		}
 		file_app_router_config_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Config); i {
+			switch v := v.(*StrategyLeastLoadConfig); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1455,6 +1517,18 @@ func file_app_router_config_proto_init() {
 			}
 		}
 		file_app_router_config_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Config); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_app_router_config_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Domain_Attribute); i {
 			case 0:
 				return &v.state
@@ -1471,7 +1545,7 @@ func file_app_router_config_proto_init() {
 		(*RoutingRule_Tag)(nil),
 		(*RoutingRule_BalancingTag)(nil),
 	}
-	file_app_router_config_proto_msgTypes[11].OneofWrappers = []interface{}{
+	file_app_router_config_proto_msgTypes[12].OneofWrappers = []interface{}{
 		(*Domain_Attribute_BoolValue)(nil),
 		(*Domain_Attribute_IntValue)(nil),
 	}
@@ -1481,7 +1555,7 @@ func file_app_router_config_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_app_router_config_proto_rawDesc,
 			NumEnums:      2,
-			NumMessages:   12,
+			NumMessages:   13,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

app/router/config.proto

@@ -136,7 +136,11 @@ message BalancingRule {
 message StrategyWeight {
   bool regexp = 1;
   string match = 2;
-  float value =3;
+  float value = 3;
+}
+
+message StrategyLeastPingConfig {
+  string observer_tag = 7;
 }
 
 message StrategyLeastLoadConfig {
@@ -150,6 +154,8 @@ message StrategyLeastLoadConfig {
   int64 maxRTT = 5;
   // acceptable failure rate
   float tolerance = 6;
+
+  string observer_tag = 7;
 }
 
 message Config {

app/router/strategy_leastload.go

@@ -2,9 +2,12 @@ package router
 
 import (
 	"context"
+	"github.com/golang/protobuf/proto"
 	core "github.com/v2fly/v2ray-core/v4"
 	"github.com/v2fly/v2ray-core/v4/app/observatory"
 	"github.com/v2fly/v2ray-core/v4/common"
+	"github.com/v2fly/v2ray-core/v4/features"
+	"github.com/v2fly/v2ray-core/v4/features/extension"
 	"math"
 	"sort"
 	"time"
@@ -17,7 +20,7 @@ type LeastLoadStrategy struct {
 	settings *StrategyLeastLoadConfig
 	costs    *WeightManager
 
-	observer *observatory.Observer
+	observer extension.Observatory
 
 	ctx context.Context
 }
@@ -137,12 +140,22 @@ func (s *LeastLoadStrategy) selectLeastLoad(nodes []*node) []*node {
 }
 
 func (s *LeastLoadStrategy) getNodes(candidates []string, maxRTT time.Duration) []*node {
-	observeResult, err := s.observer.GetObservation(s.ctx)
-	if err != nil {
-		newError("cannot get observation").Base(err)
+	var result proto.Message
+	if s.settings.ObserverTag == "" {
+		observeResult, err := s.observer.GetObservation(s.ctx)
+		if err != nil {
+			newError("cannot get observation").Base(err)
+		}
+		result = observeResult
+	} else {
+		observeResult, err := common.Must2(s.observer.(features.TaggedFeatures).GetFeaturesByTag(s.settings.ObserverTag)).(extension.Observatory).GetObservation(s.ctx)
+		if err != nil {
+			newError("cannot get observation").Base(err)
+		}
+		result = observeResult
 	}
 
-	results := observeResult.(*observatory.ObservationResult)
+	results := result.(*observatory.ObservationResult)
 
 	outboundlist := outboundList(candidates)
 

app/router/strategy_leastping.go

@@ -5,6 +5,7 @@ package router
 
 import (
 	"context"
+	"github.com/v2fly/v2ray-core/v4/features"
 
 	core "github.com/v2fly/v2ray-core/v4"
 	"github.com/v2fly/v2ray-core/v4/app/observatory"
@@ -15,6 +16,8 @@ import (
 type LeastPingStrategy struct {
 	ctx         context.Context
 	observatory extension.Observatory
+
+	config *StrategyLeastPingConfig
 }
 
 func (l *LeastPingStrategy) GetPrincipleTarget(strings []string) []string {
@@ -28,7 +31,11 @@ func (l *LeastPingStrategy) InjectContext(ctx context.Context) {
 func (l *LeastPingStrategy) PickOutbound(strings []string) string {
 	if l.observatory == nil {
 		common.Must(core.RequireFeatures(l.ctx, func(observatory extension.Observatory) error {
-			l.observatory = observatory
+			if l.config.ObserverTag != "" {
+				l.observatory = common.Must2(observatory.(features.TaggedFeatures).GetFeaturesByTag(l.config.ObserverTag)).(extension.Observatory)
+			} else {
+				l.observatory = observatory
+			}
 			return nil
 		}))
 	}