diff --git a/api/v1/service_manage/request.proto b/api/v1/service_manage/request.proto
index 49f98b4..bc4bb3e 100644
--- a/api/v1/service_manage/request.proto
+++ b/api/v1/service_manage/request.proto
@@ -31,6 +31,8 @@ message DiscoverRequest {
     CUSTOM_ROUTE_RULE = 101;
     // 就近路由规则
     NEARBY_ROUTE_RULE = 102;
+    // 无损上下线规则
+    LOSSLESS = 103;
   }
 
   DiscoverRequestType type = 1;
diff --git a/api/v1/service_manage/response.proto b/api/v1/service_manage/response.proto
index d04f56e..eb0ffdb 100644
--- a/api/v1/service_manage/response.proto
+++ b/api/v1/service_manage/response.proto
@@ -16,6 +16,7 @@ import "fault_detector.proto";
 import "auth.proto";
 import "contract.proto";
 import "lane.proto";
+import "lossless.proto";
 
 option go_package = "github.com/polarismesh/specification/source/go/api/v1/service_manage";
 option java_package = "com.tencent.polaris.specification.api.v1.service.manage";
@@ -101,6 +102,8 @@ message DiscoverResponse {
     CUSTOM_ROUTE_RULE = 101;
     // 就近路由规则
     NEARBY_ROUTE_RULE = 102;
+    // 无损上下线规则
+    LOSSLESS = 103;
   }
 
   DiscoverResponseType type = 3;
@@ -119,6 +122,8 @@ message DiscoverResponse {
   repeated RouteRule customRouteRules = 23;
   // 就近路由规则内容
   repeated RouteRule nearbyRouteRules = 24;
+  // 无损上下线规则内容
+  LosslessRule losslessRule = 25;
 }
 
 message OptionSwitch { map<string, string> options = 1; }
diff --git a/api/v1/traffic_manage/lossless.proto b/api/v1/traffic_manage/lossless.proto
new file mode 100644
index 0000000..862e059
--- /dev/null
+++ b/api/v1/traffic_manage/lossless.proto
@@ -0,0 +1,86 @@
+syntax = "proto3";
+
+package v1;
+
+import "google/protobuf/wrappers.proto";
+import "google/protobuf/duration.proto";
+import "model.proto";
+
+option go_package = "github.com/polarismesh/specification/source/go/api/v1/traffic_manage";
+option java_package = "com.tencent.polaris.specification.api.v1.traffic.manage";
+option java_outer_classname = "LosslessProto";
+
+// 优雅上下线规则的模型
+message LosslessRule {
+  // rule id
+  string id = 1 [ json_name = "id" ];
+  // service for rule belongs to
+  string service = 2 [ json_name = "service" ];
+  // namespace for rule belongs to
+  string namespace = 3 [ json_name = "namespace" ];
+  // revision routing version
+  string revision = 4 [ json_name = "revision" ];
+  // ctime create time of the rules
+  string ctime = 5 [ json_name = "ctime" ];
+  // mtime modify time of the rules
+  string mtime = 6 [ json_name = "mtime" ];
+  // configuration for lossless online
+  LosslessOnline losslessOnline = 7 [ json_name = "lossless_online" ];
+  // configuration for lossless offline
+  LosslessOffline losslessOffline = 8 [ json_name = "lossless_offline" ];
+}
+
+message LosslessOnline {
+  // configuration for delayRegister
+  DelayRegister delayRegister = 1 [ json_name = "delay_register" ];
+  // configuration for warmup
+  Warmup warmup = 2 [ json_name = "warmup" ];
+  // configuration for readiness probe
+  Readiness readiness = 3 [ json_name = "readiness" ];
+}
+
+message DelayRegister {
+  // enable delay registry
+  bool enable = 1 [ json_name = "enable" ];
+  enum DelayStrategy {
+    // register instance after delay specific time
+    DELAY_BY_TIME = 0;
+    // register instance until health check successfully
+    DELAY_BY_HEALTH_CHECK = 1;
+  }
+  // delay register strategy
+  DelayStrategy strategy = 2 [ json_name = "strategy" ];
+  // delay register time by second, active when strategy == DELAY_BY_TIME
+  int32 intervalSecond = 3 [ json_name = "interval_second" ];
+  // protocol to do health check, default http, active when strategy == DELAY_BY_HEALTH_CHECK
+  string healthCheckProtocol = 4 [ json_name = "health_check_protocol" ];
+  // method to do health check, default GET, active when strategy == DELAY_BY_HEALTH_CHECK
+  string healthCheckMethod = 5 [ json_name = "health_check_method" ];
+  // path to do health check, no default value, active when strategy == DELAY_BY_HEALTH_CHECK
+  string healthCheckPath = 6 [ json_name = "health_check_path" ];
+  // health check interval second, default is 30, active when strategy == DELAY_BY_HEALTH_CHECK
+  string healthCheckIntervalSecond = 7 [ json_name = "health_check_interval_second" ];
+}
+
+message Warmup {
+  // enable warmup
+  bool enable = 1 [ json_name = "enable" ];
+  // total warmup interval by second
+  int32 intervalSecond = 2 [ json_name = "interval_second" ];
+  // warmup stop when most of the instances in service are in warmup status
+  bool enableOverloadProtection = 3 [ json_name = "enable_overload_protection" ];
+  // the threshold to active overload protection, default is 50, threshld = sum(WarmupInstances)/sum(AllInstances)*100
+  int32 overloadProtectionThreshold = 4 [ json_name = "overload_protection_threshold" ];
+  // curvature for warmup register, default is 1
+  int32 curvature = 5 [ json_name = "curvature" ];
+}
+
+message Readiness {
+  // enable /readiness expose
+  bool enable = 1 [ json_name = "enable" ];
+}
+
+message LosslessOffline {
+  // enable /offline expose
+  bool enable = 1 [ json_name = "enable" ];
+}