diff --git a/Cargo.toml b/Cargo.toml
index 5c3a65d..6559cfe 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "dragonfly-api"
-version = "2.0.12"
+version = "2.0.13"
 authors = ["Gaius <gaius.qi@gmail.com>"]
 edition = "2021"
 license = "Apache-2.0"
diff --git a/pkg/apis/common/v2/common.pb.go b/pkg/apis/common/v2/common.pb.go
index f563df8..7ea659d 100644
--- a/pkg/apis/common/v2/common.pb.go
+++ b/pkg/apis/common/v2/common.pb.go
@@ -660,15 +660,15 @@ type Host struct {
 	// Host kernel version.
 	KernelVersion string `protobuf:"bytes,11,opt,name=kernel_version,json=kernelVersion,proto3" json:"kernel_version,omitempty"`
 	// CPU Stat.
-	Cpu *CPU `protobuf:"bytes,12,opt,name=cpu,proto3" json:"cpu,omitempty"`
+	Cpu *CPU `protobuf:"bytes,12,opt,name=cpu,proto3,oneof" json:"cpu,omitempty"`
 	// Memory Stat.
-	Memory *Memory `protobuf:"bytes,13,opt,name=memory,proto3" json:"memory,omitempty"`
+	Memory *Memory `protobuf:"bytes,13,opt,name=memory,proto3,oneof" json:"memory,omitempty"`
 	// Network Stat.
-	Network *Network `protobuf:"bytes,14,opt,name=network,proto3" json:"network,omitempty"`
+	Network *Network `protobuf:"bytes,14,opt,name=network,proto3,oneof" json:"network,omitempty"`
 	// Disk Stat.
-	Disk *Disk `protobuf:"bytes,15,opt,name=disk,proto3" json:"disk,omitempty"`
+	Disk *Disk `protobuf:"bytes,15,opt,name=disk,proto3,oneof" json:"disk,omitempty"`
 	// Build information.
-	Build *Build `protobuf:"bytes,16,opt,name=build,proto3" json:"build,omitempty"`
+	Build *Build `protobuf:"bytes,16,opt,name=build,proto3,oneof" json:"build,omitempty"`
 }
 
 func (x *Host) Reset() {
@@ -830,7 +830,7 @@ type CPU struct {
 	// Calculates the percentage of cpu used by process.
 	ProcessPercent float64 `protobuf:"fixed64,4,opt,name=process_percent,json=processPercent,proto3" json:"process_percent,omitempty"`
 	// CPUTimes contains the amounts of time the CPU has spent performing different kinds of work.
-	Times *CPUTimes `protobuf:"bytes,5,opt,name=times,proto3" json:"times,omitempty"`
+	Times *CPUTimes `protobuf:"bytes,5,opt,name=times,proto3,oneof" json:"times,omitempty"`
 }
 
 func (x *CPU) Reset() {
@@ -1842,8 +1842,8 @@ var file_pkg_apis_common_v2_common_proto_rawDesc = []byte{
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+	0x10, 0x05, 0x12, 0x0a, 0x0a, 0x06, 0x4c, 0x45, 0x56, 0x45, 0x4c, 0x36, 0x10, 0x06, 0x42, 0x29,
+	0x5a, 0x27, 0x64, 0x37, 0x79, 0x2e, 0x69, 0x6f, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x76, 0x32, 0x2f,
+	0x70, 0x6b, 0x67, 0x2f, 0x61, 0x70, 0x69, 0x73, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f,
+	0x76, 0x32, 0x3b, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x33,
 }
 
 var (
@@ -2306,6 +2308,8 @@ func file_pkg_apis_common_v2_common_proto_init() {
 			}
 		}
 	}
+	file_pkg_apis_common_v2_common_proto_msgTypes[2].OneofWrappers = []interface{}{}
+	file_pkg_apis_common_v2_common_proto_msgTypes[3].OneofWrappers = []interface{}{}
 	file_pkg_apis_common_v2_common_proto_msgTypes[6].OneofWrappers = []interface{}{}
 	file_pkg_apis_common_v2_common_proto_msgTypes[8].OneofWrappers = []interface{}{}
 	type x struct{}
diff --git a/pkg/apis/common/v2/common.pb.validate.go b/pkg/apis/common/v2/common.pb.validate.go
index 101f85b..b0cb810 100644
--- a/pkg/apis/common/v2/common.pb.validate.go
+++ b/pkg/apis/common/v2/common.pb.validate.go
@@ -750,204 +750,169 @@ func (m *Host) validate(all bool) error {
 
 	// no validation rules for KernelVersion
 
-	if m.GetCpu() == nil {
-		err := HostValidationError{
-			field:  "Cpu",
-			reason: "value is required",
-		}
-		if !all {
-			return err
-		}
-		errors = append(errors, err)
-	}
+	if m.Cpu != nil {
 
-	if all {
-		switch v := interface{}(m.GetCpu()).(type) {
-		case interface{ ValidateAll() error }:
-			if err := v.ValidateAll(); err != nil {
-				errors = append(errors, HostValidationError{
+		if all {
+			switch v := interface{}(m.GetCpu()).(type) {
+			case interface{ ValidateAll() error }:
+				if err := v.ValidateAll(); err != nil {
+					errors = append(errors, HostValidationError{
+						field:  "Cpu",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			case interface{ Validate() error }:
+				if err := v.Validate(); err != nil {
+					errors = append(errors, HostValidationError{
+						field:  "Cpu",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			}
+		} else if v, ok := interface{}(m.GetCpu()).(interface{ Validate() error }); ok {
+			if err := v.Validate(); err != nil {
+				return HostValidationError{
 					field:  "Cpu",
 					reason: "embedded message failed validation",
 					cause:  err,
-				})
+				}
 			}
-		case interface{ Validate() error }:
+		}
+
+	}
+
+	if m.Memory != nil {
+
+		if all {
+			switch v := interface{}(m.GetMemory()).(type) {
+			case interface{ ValidateAll() error }:
+				if err := v.ValidateAll(); err != nil {
+					errors = append(errors, HostValidationError{
+						field:  "Memory",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			case interface{ Validate() error }:
+				if err := v.Validate(); err != nil {
+					errors = append(errors, HostValidationError{
+						field:  "Memory",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			}
+		} else if v, ok := interface{}(m.GetMemory()).(interface{ Validate() error }); ok {
 			if err := v.Validate(); err != nil {
-				errors = append(errors, HostValidationError{
-					field:  "Cpu",
-					reason: "embedded message failed validation",
-					cause:  err,
-				})
-			}
-		}
-	} else if v, ok := interface{}(m.GetCpu()).(interface{ Validate() error }); ok {
-		if err := v.Validate(); err != nil {
-			return HostValidationError{
-				field:  "Cpu",
-				reason: "embedded message failed validation",
-				cause:  err,
-			}
-		}
-	}
-
-	if m.GetMemory() == nil {
-		err := HostValidationError{
-			field:  "Memory",
-			reason: "value is required",
-		}
-		if !all {
-			return err
-		}
-		errors = append(errors, err)
-	}
-
-	if all {
-		switch v := interface{}(m.GetMemory()).(type) {
-		case interface{ ValidateAll() error }:
-			if err := v.ValidateAll(); err != nil {
-				errors = append(errors, HostValidationError{
+				return HostValidationError{
 					field:  "Memory",
 					reason: "embedded message failed validation",
 					cause:  err,
-				})
+				}
 			}
-		case interface{ Validate() error }:
+		}
+
+	}
+
+	if m.Network != nil {
+
+		if all {
+			switch v := interface{}(m.GetNetwork()).(type) {
+			case interface{ ValidateAll() error }:
+				if err := v.ValidateAll(); err != nil {
+					errors = append(errors, HostValidationError{
+						field:  "Network",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			case interface{ Validate() error }:
+				if err := v.Validate(); err != nil {
+					errors = append(errors, HostValidationError{
+						field:  "Network",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			}
+		} else if v, ok := interface{}(m.GetNetwork()).(interface{ Validate() error }); ok {
 			if err := v.Validate(); err != nil {
-				errors = append(errors, HostValidationError{
-					field:  "Memory",
-					reason: "embedded message failed validation",
-					cause:  err,
-				})
-			}
-		}
-	} else if v, ok := interface{}(m.GetMemory()).(interface{ Validate() error }); ok {
-		if err := v.Validate(); err != nil {
-			return HostValidationError{
-				field:  "Memory",
-				reason: "embedded message failed validation",
-				cause:  err,
-			}
-		}
-	}
-
-	if m.GetNetwork() == nil {
-		err := HostValidationError{
-			field:  "Network",
-			reason: "value is required",
-		}
-		if !all {
-			return err
-		}
-		errors = append(errors, err)
-	}
-
-	if all {
-		switch v := interface{}(m.GetNetwork()).(type) {
-		case interface{ ValidateAll() error }:
-			if err := v.ValidateAll(); err != nil {
-				errors = append(errors, HostValidationError{
+				return HostValidationError{
 					field:  "Network",
 					reason: "embedded message failed validation",
 					cause:  err,
-				})
+				}
 			}
-		case interface{ Validate() error }:
+		}
+
+	}
+
+	if m.Disk != nil {
+
+		if all {
+			switch v := interface{}(m.GetDisk()).(type) {
+			case interface{ ValidateAll() error }:
+				if err := v.ValidateAll(); err != nil {
+					errors = append(errors, HostValidationError{
+						field:  "Disk",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			case interface{ Validate() error }:
+				if err := v.Validate(); err != nil {
+					errors = append(errors, HostValidationError{
+						field:  "Disk",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			}
+		} else if v, ok := interface{}(m.GetDisk()).(interface{ Validate() error }); ok {
 			if err := v.Validate(); err != nil {
-				errors = append(errors, HostValidationError{
-					field:  "Network",
-					reason: "embedded message failed validation",
-					cause:  err,
-				})
-			}
-		}
-	} else if v, ok := interface{}(m.GetNetwork()).(interface{ Validate() error }); ok {
-		if err := v.Validate(); err != nil {
-			return HostValidationError{
-				field:  "Network",
-				reason: "embedded message failed validation",
-				cause:  err,
-			}
-		}
-	}
-
-	if m.GetDisk() == nil {
-		err := HostValidationError{
-			field:  "Disk",
-			reason: "value is required",
-		}
-		if !all {
-			return err
-		}
-		errors = append(errors, err)
-	}
-
-	if all {
-		switch v := interface{}(m.GetDisk()).(type) {
-		case interface{ ValidateAll() error }:
-			if err := v.ValidateAll(); err != nil {
-				errors = append(errors, HostValidationError{
+				return HostValidationError{
 					field:  "Disk",
 					reason: "embedded message failed validation",
 					cause:  err,
-				})
+				}
 			}
-		case interface{ Validate() error }:
+		}
+
+	}
+
+	if m.Build != nil {
+
+		if all {
+			switch v := interface{}(m.GetBuild()).(type) {
+			case interface{ ValidateAll() error }:
+				if err := v.ValidateAll(); err != nil {
+					errors = append(errors, HostValidationError{
+						field:  "Build",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			case interface{ Validate() error }:
+				if err := v.Validate(); err != nil {
+					errors = append(errors, HostValidationError{
+						field:  "Build",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			}
+		} else if v, ok := interface{}(m.GetBuild()).(interface{ Validate() error }); ok {
 			if err := v.Validate(); err != nil {
-				errors = append(errors, HostValidationError{
-					field:  "Disk",
-					reason: "embedded message failed validation",
-					cause:  err,
-				})
-			}
-		}
-	} else if v, ok := interface{}(m.GetDisk()).(interface{ Validate() error }); ok {
-		if err := v.Validate(); err != nil {
-			return HostValidationError{
-				field:  "Disk",
-				reason: "embedded message failed validation",
-				cause:  err,
-			}
-		}
-	}
-
-	if m.GetBuild() == nil {
-		err := HostValidationError{
-			field:  "Build",
-			reason: "value is required",
-		}
-		if !all {
-			return err
-		}
-		errors = append(errors, err)
-	}
-
-	if all {
-		switch v := interface{}(m.GetBuild()).(type) {
-		case interface{ ValidateAll() error }:
-			if err := v.ValidateAll(); err != nil {
-				errors = append(errors, HostValidationError{
+				return HostValidationError{
 					field:  "Build",
 					reason: "embedded message failed validation",
 					cause:  err,
-				})
-			}
-		case interface{ Validate() error }:
-			if err := v.Validate(); err != nil {
-				errors = append(errors, HostValidationError{
-					field:  "Build",
-					reason: "embedded message failed validation",
-					cause:  err,
-				})
-			}
-		}
-	} else if v, ok := interface{}(m.GetBuild()).(interface{ Validate() error }); ok {
-		if err := v.Validate(); err != nil {
-			return HostValidationError{
-				field:  "Build",
-				reason: "embedded message failed validation",
-				cause:  err,
+				}
 			}
 		}
+
 	}
 
 	if len(errors) > 0 {
@@ -1074,44 +1039,37 @@ func (m *CPU) validate(all bool) error {
 		errors = append(errors, err)
 	}
 
-	if m.GetTimes() == nil {
-		err := CPUValidationError{
-			field:  "Times",
-			reason: "value is required",
-		}
-		if !all {
-			return err
-		}
-		errors = append(errors, err)
-	}
+	if m.Times != nil {
 
-	if all {
-		switch v := interface{}(m.GetTimes()).(type) {
-		case interface{ ValidateAll() error }:
-			if err := v.ValidateAll(); err != nil {
-				errors = append(errors, CPUValidationError{
-					field:  "Times",
-					reason: "embedded message failed validation",
-					cause:  err,
-				})
+		if all {
+			switch v := interface{}(m.GetTimes()).(type) {
+			case interface{ ValidateAll() error }:
+				if err := v.ValidateAll(); err != nil {
+					errors = append(errors, CPUValidationError{
+						field:  "Times",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
+			case interface{ Validate() error }:
+				if err := v.Validate(); err != nil {
+					errors = append(errors, CPUValidationError{
+						field:  "Times",
+						reason: "embedded message failed validation",
+						cause:  err,
+					})
+				}
 			}
-		case interface{ Validate() error }:
+		} else if v, ok := interface{}(m.GetTimes()).(interface{ Validate() error }); ok {
 			if err := v.Validate(); err != nil {
-				errors = append(errors, CPUValidationError{
+				return CPUValidationError{
 					field:  "Times",
 					reason: "embedded message failed validation",
 					cause:  err,
-				})
-			}
-		}
-	} else if v, ok := interface{}(m.GetTimes()).(interface{ Validate() error }); ok {
-		if err := v.Validate(); err != nil {
-			return CPUValidationError{
-				field:  "Times",
-				reason: "embedded message failed validation",
-				cause:  err,
+				}
 			}
 		}
+
 	}
 
 	if len(errors) > 0 {
diff --git a/pkg/apis/common/v2/common.proto b/pkg/apis/common/v2/common.proto
index 7bb7e50..fe625f0 100644
--- a/pkg/apis/common/v2/common.proto
+++ b/pkg/apis/common/v2/common.proto
@@ -197,15 +197,15 @@ message Host {
   // Host kernel version.
   string kernel_version = 11;
   // CPU Stat.
-  CPU cpu = 12 [(validate.rules).message.required = true];
+  optional CPU cpu = 12;
   // Memory Stat.
-  Memory memory = 13 [(validate.rules).message.required = true];
+  optional Memory memory = 13;
   // Network Stat.
-  Network network = 14 [(validate.rules).message.required = true];
+  optional Network network = 14;
   // Disk Stat.
-  Disk disk = 15 [(validate.rules).message.required = true];
+  optional Disk disk = 15;
   // Build information.
-  Build build = 16 [(validate.rules).message.required = true];
+  optional Build build = 16;
 }
 
 // CPU Stat.
@@ -219,7 +219,7 @@ message CPU {
   // Calculates the percentage of cpu used by process.
   double process_percent = 4 [(validate.rules).double.gte = 0];
   // CPUTimes contains the amounts of time the CPU has spent performing different kinds of work.
-  CPUTimes times = 5 [(validate.rules).message.required = true];
+  optional CPUTimes times = 5;
 }
 
 // CPUTimes contains the amounts of time the CPU has spent performing different
diff --git a/proto/common.proto b/proto/common.proto
index 83ffdcc..4e2577b 100644
--- a/proto/common.proto
+++ b/proto/common.proto
@@ -191,15 +191,15 @@ message Host {
   // Host kernel version.
   string kernel_version = 11;
   // CPU Stat.
-  CPU cpu = 12;
+  optional CPU cpu = 12;
   // Memory Stat.
-  Memory memory = 13;
+  optional Memory memory = 13;
   // Network Stat.
-  Network network = 14;
+  optional Network network = 14;
   // Disk Stat.
-  Disk disk = 15;
+  optional Disk disk = 15;
   // Build information.
-  Build build = 16;
+  optional Build build = 16;
 }
 
 // CPU Stat.
@@ -213,7 +213,7 @@ message CPU {
   // Calculates the percentage of cpu used by process.
   double process_percent = 4;
   // CPUTimes contains the amounts of time the CPU has spent performing different kinds of work.
-  CPUTimes times = 5;
+  optional CPUTimes times = 5;
 }
 
 // CPUTimes contains the amounts of time the CPU has spent performing different
diff --git a/src/descriptor.bin b/src/descriptor.bin
index 0dfb081..c847b3f 100644
Binary files a/src/descriptor.bin and b/src/descriptor.bin differ