feat(dns-server): check system prerequisites when init/add machine: DNS port is not in use by another DNS server

internal/cli/cli.go

@@ -7,6 +7,7 @@ import (
 	"net/netip"
 	"os"
 
+	"github.com/charmbracelet/huh"
 	"github.com/docker/cli/cli/streams"
 	"github.com/psviderski/uncloud/internal/cli/config"
 	"github.com/psviderski/uncloud/internal/fs"
@@ -16,8 +17,8 @@ import (
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/psviderski/uncloud/pkg/client"
 	"github.com/psviderski/uncloud/pkg/client/connector"
-
+	"google.golang.org/grpc/codes"
-	"github.com/charmbracelet/huh"
+	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/types/known/emptypb"
 )
 
@@ -194,6 +195,17 @@ func (cli *CLI) initRemoteMachine(ctx context.Context, opts InitClusterOptions)
 		}
 	}
 
+	// Check machine meets all necessary system requirements before proceeding.
+	checkResp, err := machineClient.CheckPrerequisites(ctx, &emptypb.Empty{})
+	// TODO(lhf): remove Unimplemented check when v0.9.0 is released.
+	if err != nil {
+		if status.Convert(err).Code() != codes.Unimplemented {
+			return nil, fmt.Errorf("check machine prerequisites: %w", err)
+		}
+	} else if !checkResp.Satisfied {
+		return nil, fmt.Errorf("machine prerequisites not satisfied: %s", checkResp.Error)
+	}
+
 	req := &pb.InitClusterRequest{
 		MachineName: opts.MachineName,
 		Network:     pb.NewIPPrefix(opts.Network),
@@ -275,6 +287,17 @@ func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (*client
 		}
 	}
 
+	// Check machine meets all necessary system requirements before proceeding.
+	checkResp, err := machineClient.CheckPrerequisites(ctx, &emptypb.Empty{})
+	// TODO(lhf): remove Unimplemented check when v0.9.0 is released.
+	if err != nil {
+		if status.Convert(err).Code() != codes.Unimplemented {
+			return nil, fmt.Errorf("check machine prerequisites: %w", err)
+		}
+	} else if !checkResp.Satisfied {
+		return nil, fmt.Errorf("machine prerequisites not satisfied: %s", checkResp.Error)
+	}
+
 	tokenResp, err := machineClient.Token(ctx, &emptypb.Empty{})
 	if err != nil {
 		return nil, fmt.Errorf("get remote machine token: %w", err)

internal/machine/api/pb/machine.pb.go

@@ -21,6 +21,63 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+type CheckPrerequisitesResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Overall status of the checks.
+	Satisfied bool `protobuf:"varint,1,opt,name=satisfied,proto3" json:"satisfied,omitempty"`
+	// Error message if not satisfied (empty if all checks pass).
+	Error string `protobuf:"bytes,2,opt,name=error,proto3" json:"error,omitempty"`
+}
+
+func (x *CheckPrerequisitesResponse) Reset() {
+	*x = CheckPrerequisitesResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CheckPrerequisitesResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CheckPrerequisitesResponse) ProtoMessage() {}
+
+func (x *CheckPrerequisitesResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[0]
+	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 CheckPrerequisitesResponse.ProtoReflect.Descriptor instead.
+func (*CheckPrerequisitesResponse) Descriptor() ([]byte, []int) {
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *CheckPrerequisitesResponse) GetSatisfied() bool {
+	if x != nil {
+		return x.Satisfied
+	}
+	return false
+}
+
+func (x *CheckPrerequisitesResponse) GetError() string {
+	if x != nil {
+		return x.Error
+	}
+	return ""
+}
+
 type MachineInfo struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -35,7 +92,7 @@ type MachineInfo struct {
 func (x *MachineInfo) Reset() {
 	*x = MachineInfo{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[0]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[1]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -48,7 +105,7 @@ func (x *MachineInfo) String() string {
 func (*MachineInfo) ProtoMessage() {}
 
 func (x *MachineInfo) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[0]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[1]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -61,7 +118,7 @@ func (x *MachineInfo) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MachineInfo.ProtoReflect.Descriptor instead.
 func (*MachineInfo) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{0}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{1}
 }
 
 func (x *MachineInfo) GetId() string {
@@ -106,7 +163,7 @@ type NetworkConfig struct {
 func (x *NetworkConfig) Reset() {
 	*x = NetworkConfig{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[1]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[2]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -119,7 +176,7 @@ func (x *NetworkConfig) String() string {
 func (*NetworkConfig) ProtoMessage() {}
 
 func (x *NetworkConfig) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[1]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[2]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -132,7 +189,7 @@ func (x *NetworkConfig) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use NetworkConfig.ProtoReflect.Descriptor instead.
 func (*NetworkConfig) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{1}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{2}
 }
 
 func (x *NetworkConfig) GetSubnet() *IPPrefix {
@@ -180,7 +237,7 @@ type InitClusterRequest struct {
 func (x *InitClusterRequest) Reset() {
 	*x = InitClusterRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[2]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -193,7 +250,7 @@ func (x *InitClusterRequest) String() string {
 func (*InitClusterRequest) ProtoMessage() {}
 
 func (x *InitClusterRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[2]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -206,7 +263,7 @@ func (x *InitClusterRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InitClusterRequest.ProtoReflect.Descriptor instead.
 func (*InitClusterRequest) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{2}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *InitClusterRequest) GetMachineName() string {
@@ -271,7 +328,7 @@ type InitClusterResponse struct {
 func (x *InitClusterResponse) Reset() {
 	*x = InitClusterResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[3]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -284,7 +341,7 @@ func (x *InitClusterResponse) String() string {
 func (*InitClusterResponse) ProtoMessage() {}
 
 func (x *InitClusterResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[3]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -297,7 +354,7 @@ func (x *InitClusterResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InitClusterResponse.ProtoReflect.Descriptor instead.
 func (*InitClusterResponse) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{3}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *InitClusterResponse) GetMachine() *MachineInfo {
@@ -319,7 +376,7 @@ type JoinClusterRequest struct {
 func (x *JoinClusterRequest) Reset() {
 	*x = JoinClusterRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[4]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[5]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -332,7 +389,7 @@ func (x *JoinClusterRequest) String() string {
 func (*JoinClusterRequest) ProtoMessage() {}
 
 func (x *JoinClusterRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[4]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[5]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -345,7 +402,7 @@ func (x *JoinClusterRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use JoinClusterRequest.ProtoReflect.Descriptor instead.
 func (*JoinClusterRequest) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{4}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *JoinClusterRequest) GetMachine() *MachineInfo {
@@ -373,7 +430,7 @@ type TokenResponse struct {
 func (x *TokenResponse) Reset() {
 	*x = TokenResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[5]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -386,7 +443,7 @@ func (x *TokenResponse) String() string {
 func (*TokenResponse) ProtoMessage() {}
 
 func (x *TokenResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[5]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -399,7 +456,7 @@ func (x *TokenResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use TokenResponse.ProtoReflect.Descriptor instead.
 func (*TokenResponse) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{5}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *TokenResponse) GetToken() string {
@@ -423,7 +480,7 @@ type Service struct {
 func (x *Service) Reset() {
 	*x = Service{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[6]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -436,7 +493,7 @@ func (x *Service) String() string {
 func (*Service) ProtoMessage() {}
 
 func (x *Service) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[6]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -449,7 +506,7 @@ func (x *Service) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Service.ProtoReflect.Descriptor instead.
 func (*Service) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{6}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *Service) GetId() string {
@@ -491,7 +548,7 @@ type InspectServiceRequest struct {
 func (x *InspectServiceRequest) Reset() {
 	*x = InspectServiceRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[7]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -504,7 +561,7 @@ func (x *InspectServiceRequest) String() string {
 func (*InspectServiceRequest) ProtoMessage() {}
 
 func (x *InspectServiceRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[7]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -517,7 +574,7 @@ func (x *InspectServiceRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InspectServiceRequest.ProtoReflect.Descriptor instead.
 func (*InspectServiceRequest) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{7}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *InspectServiceRequest) GetId() string {
@@ -538,7 +595,7 @@ type InspectServiceResponse struct {
 func (x *InspectServiceResponse) Reset() {
 	*x = InspectServiceResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[8]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -551,7 +608,7 @@ func (x *InspectServiceResponse) String() string {
 func (*InspectServiceResponse) ProtoMessage() {}
 
 func (x *InspectServiceResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[8]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -564,7 +621,7 @@ func (x *InspectServiceResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InspectServiceResponse.ProtoReflect.Descriptor instead.
 func (*InspectServiceResponse) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{8}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *InspectServiceResponse) GetService() *Service {
@@ -587,7 +644,7 @@ type Service_Container struct {
 func (x *Service_Container) Reset() {
 	*x = Service_Container{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[9]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -600,7 +657,7 @@ func (x *Service_Container) String() string {
 func (*Service_Container) ProtoMessage() {}
 
 func (x *Service_Container) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[9]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -613,7 +670,7 @@ func (x *Service_Container) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Service_Container.ProtoReflect.Descriptor instead.
 func (*Service_Container) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{6, 0}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{7, 0}
 }
 
 func (x *Service_Container) GetMachineId() string {
@@ -640,96 +697,106 @@ var file_internal_machine_api_pb_machine_proto_rawDesc = []byte{
 	0x70, 0x74, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x24, 0x69, 0x6e, 0x74, 0x65, 0x72,
 	0x6e, 0x61, 0x6c, 0x2f, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x2f, 0x61, 0x70, 0x69, 0x2f,
 	0x70, 0x62, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22,
-	0x85, 0x01, 0x0a, 0x0b, 0x4d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x49, 0x6e, 0x66, 0x6f, 0x12,
+	0x50, 0x0a, 0x1a, 0x43, 0x68, 0x65, 0x63, 0x6b, 0x50, 0x72, 0x65, 0x72, 0x65, 0x71, 0x75, 0x69,
-	0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12,
+	0x73, 0x69, 0x74, 0x65, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x1c, 0x0a,
-	0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e,
+	0x09, 0x73, 0x61, 0x74, 0x69, 0x73, 0x66, 0x69, 0x65, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x08,
-	0x61, 0x6d, 0x65, 0x12, 0x2c, 0x0a, 0x07, 0x6e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b, 0x18, 0x03,
+	0x52, 0x09, 0x73, 0x61, 0x74, 0x69, 0x73, 0x66, 0x69, 0x65, 0x64, 0x12, 0x14, 0x0a, 0x05, 0x65,
-	0x20, 0x01, 0x28, 0x0b, 0x32, 0x12, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x4e, 0x65, 0x74, 0x77, 0x6f,
+	0x72, 0x72, 0x6f, 0x72, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x65, 0x72, 0x72, 0x6f,
-	0x72, 0x6b, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x52, 0x07, 0x6e, 0x65, 0x74, 0x77, 0x6f, 0x72,
+	0x72, 0x22, 0x85, 0x01, 0x0a, 0x0b, 0x4d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x49, 0x6e, 0x66,
-	0x6b, 0x12, 0x24, 0x0a, 0x09, 0x70, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x5f, 0x69, 0x70, 0x18, 0x04,
+	0x6f, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69,
-	0x20, 0x01, 0x28, 0x0b, 0x32, 0x07, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x50, 0x52, 0x08, 0x70,
+	0x64, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52,
-	0x75, 0x62, 0x6c, 0x69, 0x63, 0x49, 0x70, 0x22, 0xae, 0x01, 0x0a, 0x0d, 0x4e, 0x65, 0x74, 0x77,
+	0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x2c, 0x0a, 0x07, 0x6e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b,
-	0x6f, 0x72, 0x6b, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x25, 0x0a, 0x06, 0x73, 0x75, 0x62,
+	0x18, 0x03, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x12, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x4e, 0x65, 0x74,
-	0x6e, 0x65, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x0d, 0x2e, 0x61, 0x70, 0x69, 0x2e,
+	0x77, 0x6f, 0x72, 0x6b, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x52, 0x07, 0x6e, 0x65, 0x74, 0x77,
-	0x49, 0x50, 0x50, 0x72, 0x65, 0x66, 0x69, 0x78, 0x52, 0x06, 0x73, 0x75, 0x62, 0x6e, 0x65, 0x74,
+	0x6f, 0x72, 0x6b, 0x12, 0x24, 0x0a, 0x09, 0x70, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x5f, 0x69, 0x70,
-	0x12, 0x2c, 0x0a, 0x0d, 0x6d, 0x61, 0x6e, 0x61, 0x67, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x5f, 0x69,
+	0x18, 0x04, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x07, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x50, 0x52,
-	0x70, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x07, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x50,
+	0x08, 0x70, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x49, 0x70, 0x22, 0xae, 0x01, 0x0a, 0x0d, 0x4e, 0x65,
-	0x52, 0x0c, 0x6d, 0x61, 0x6e, 0x61, 0x67, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x49, 0x70, 0x12, 0x29,
+	0x74, 0x77, 0x6f, 0x72, 0x6b, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x25, 0x0a, 0x06, 0x73,
-	0x0a, 0x09, 0x65, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x73, 0x18, 0x03, 0x20, 0x03, 0x28,
+	0x75, 0x62, 0x6e, 0x65, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x0d, 0x2e, 0x61, 0x70,
-	0x0b, 0x32, 0x0b, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x50, 0x50, 0x6f, 0x72, 0x74, 0x52, 0x09,
+	0x69, 0x2e, 0x49, 0x50, 0x50, 0x72, 0x65, 0x66, 0x69, 0x78, 0x52, 0x06, 0x73, 0x75, 0x62, 0x6e,
-	0x65, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x73, 0x12, 0x1d, 0x0a, 0x0a, 0x70, 0x75, 0x62,
+	0x65, 0x74, 0x12, 0x2c, 0x0a, 0x0d, 0x6d, 0x61, 0x6e, 0x61, 0x67, 0x65, 0x6d, 0x65, 0x6e, 0x74,
-	0x6c, 0x69, 0x63, 0x5f, 0x6b, 0x65, 0x79, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x09, 0x70,
+	0x5f, 0x69, 0x70, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x07, 0x2e, 0x61, 0x70, 0x69, 0x2e,
-	0x75, 0x62, 0x6c, 0x69, 0x63, 0x4b, 0x65, 0x79, 0x22, 0xc3, 0x01, 0x0a, 0x12, 0x49, 0x6e, 0x69,
+	0x49, 0x50, 0x52, 0x0c, 0x6d, 0x61, 0x6e, 0x61, 0x67, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x49, 0x70,
-	0x74, 0x43, 0x6c, 0x75, 0x73, 0x74, 0x65, 0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12,
+	0x12, 0x29, 0x0a, 0x09, 0x65, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x73, 0x18, 0x03, 0x20,
-	0x20, 0x0a, 0x0b, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x4e, 0x61, 0x6d, 0x65, 0x18, 0x01,
+	0x03, 0x28, 0x0b, 0x32, 0x0b, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x50, 0x50, 0x6f, 0x72, 0x74,
-	0x20, 0x01, 0x28, 0x09, 0x52, 0x0b, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x4e, 0x61, 0x6d,
+	0x52, 0x09, 0x65, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74, 0x73, 0x12, 0x1d, 0x0a, 0x0a, 0x70,
-	0x65, 0x12, 0x27, 0x0a, 0x07, 0x6e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b, 0x18, 0x02, 0x20, 0x01,
+	0x75, 0x62, 0x6c, 0x69, 0x63, 0x5f, 0x6b, 0x65, 0x79, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0c, 0x52,
-	0x28, 0x0b, 0x32, 0x0d, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x50, 0x50, 0x72, 0x65, 0x66, 0x69,
+	0x09, 0x70, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x4b, 0x65, 0x79, 0x22, 0xc3, 0x01, 0x0a, 0x12, 0x49,
-	0x78, 0x52, 0x07, 0x6e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b, 0x12, 0x26, 0x0a, 0x09, 0x70, 0x75,
+	0x6e, 0x69, 0x74, 0x43, 0x6c, 0x75, 0x73, 0x74, 0x65, 0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73,
-	0x62, 0x6c, 0x69, 0x63, 0x5f, 0x69, 0x70, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x07, 0x2e,
+	0x74, 0x12, 0x20, 0x0a, 0x0b, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x4e, 0x61, 0x6d, 0x65,
-	0x61, 0x70, 0x69, 0x2e, 0x49, 0x50, 0x48, 0x00, 0x52, 0x08, 0x70, 0x75, 0x62, 0x6c, 0x69, 0x63,
+	0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0b, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x4e,
-	0x49, 0x70, 0x12, 0x26, 0x0a, 0x0e, 0x70, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x5f, 0x69, 0x70, 0x5f,
+	0x61, 0x6d, 0x65, 0x12, 0x27, 0x0a, 0x07, 0x6e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b, 0x18, 0x02,
-	0x61, 0x75, 0x74, 0x6f, 0x18, 0x04, 0x20, 0x01, 0x28, 0x08, 0x48, 0x00, 0x52, 0x0c, 0x70, 0x75,
+	0x20, 0x01, 0x28, 0x0b, 0x32, 0x0d, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x50, 0x50, 0x72, 0x65,
-	0x62, 0x6c, 0x69, 0x63, 0x49, 0x70, 0x41, 0x75, 0x74, 0x6f, 0x42, 0x12, 0x0a, 0x10, 0x70, 0x75,
+	0x66, 0x69, 0x78, 0x52, 0x07, 0x6e, 0x65, 0x74, 0x77, 0x6f, 0x72, 0x6b, 0x12, 0x26, 0x0a, 0x09,
-	0x62, 0x6c, 0x69, 0x63, 0x5f, 0x69, 0x70, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x22, 0x41,
+	0x70, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x5f, 0x69, 0x70, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0b, 0x32,
-	0x0a, 0x13, 0x49, 0x6e, 0x69, 0x74, 0x43, 0x6c, 0x75, 0x73, 0x74, 0x65, 0x72, 0x52, 0x65, 0x73,
+	0x07, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x50, 0x48, 0x00, 0x52, 0x08, 0x70, 0x75, 0x62, 0x6c,
-	0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x2a, 0x0a, 0x07, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65,
+	0x69, 0x63, 0x49, 0x70, 0x12, 0x26, 0x0a, 0x0e, 0x70, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x5f, 0x69,
-	0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x10, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x4d, 0x61, 0x63,
+	0x70, 0x5f, 0x61, 0x75, 0x74, 0x6f, 0x18, 0x04, 0x20, 0x01, 0x28, 0x08, 0x48, 0x00, 0x52, 0x0c,
-	0x68, 0x69, 0x6e, 0x65, 0x49, 0x6e, 0x66, 0x6f, 0x52, 0x07, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e,
+	0x70, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x49, 0x70, 0x41, 0x75, 0x74, 0x6f, 0x42, 0x12, 0x0a, 0x10,
-	0x65, 0x22, 0x79, 0x0a, 0x12, 0x4a, 0x6f, 0x69, 0x6e, 0x43, 0x6c, 0x75, 0x73, 0x74, 0x65, 0x72,
+	0x70, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x5f, 0x69, 0x70, 0x5f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67,
-	0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x2a, 0x0a, 0x07, 0x6d, 0x61, 0x63, 0x68, 0x69,
+	0x22, 0x41, 0x0a, 0x13, 0x49, 0x6e, 0x69, 0x74, 0x43, 0x6c, 0x75, 0x73, 0x74, 0x65, 0x72, 0x52,
+	0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x2a, 0x0a, 0x07, 0x6d, 0x61, 0x63, 0x68, 0x69,
 	0x6e, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x10, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x4d,
 	0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x49, 0x6e, 0x66, 0x6f, 0x52, 0x07, 0x6d, 0x61, 0x63, 0x68,
-	0x69, 0x6e, 0x65, 0x12, 0x37, 0x0a, 0x0e, 0x6f, 0x74, 0x68, 0x65, 0x72, 0x5f, 0x6d, 0x61, 0x63,
+	0x69, 0x6e, 0x65, 0x22, 0x79, 0x0a, 0x12, 0x4a, 0x6f, 0x69, 0x6e, 0x43, 0x6c, 0x75, 0x73, 0x74,
-	0x68, 0x69, 0x6e, 0x65, 0x73, 0x18, 0x03, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x10, 0x2e, 0x61, 0x70,
+	0x65, 0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x2a, 0x0a, 0x07, 0x6d, 0x61, 0x63,
-	0x69, 0x2e, 0x4d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x49, 0x6e, 0x66, 0x6f, 0x52, 0x0d, 0x6f,
+	0x68, 0x69, 0x6e, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x10, 0x2e, 0x61, 0x70, 0x69,
-	0x74, 0x68, 0x65, 0x72, 0x4d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x73, 0x22, 0x25, 0x0a, 0x0d,
+	0x2e, 0x4d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x49, 0x6e, 0x66, 0x6f, 0x52, 0x07, 0x6d, 0x61,
-	0x54, 0x6f, 0x6b, 0x65, 0x6e, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x14, 0x0a,
+	0x63, 0x68, 0x69, 0x6e, 0x65, 0x12, 0x37, 0x0a, 0x0e, 0x6f, 0x74, 0x68, 0x65, 0x72, 0x5f, 0x6d,
-	0x05, 0x74, 0x6f, 0x6b, 0x65, 0x6e, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x74, 0x6f,
+	0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x73, 0x18, 0x03, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x10, 0x2e,
-	0x6b, 0x65, 0x6e, 0x22, 0xc3, 0x01, 0x0a, 0x07, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x12,
+	0x61, 0x70, 0x69, 0x2e, 0x4d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x49, 0x6e, 0x66, 0x6f, 0x52,
-	0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12,
+	0x0d, 0x6f, 0x74, 0x68, 0x65, 0x72, 0x4d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x73, 0x22, 0x25,
-	0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e,
+	0x0a, 0x0d, 0x54, 0x6f, 0x6b, 0x65, 0x6e, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12,
-	0x61, 0x6d, 0x65, 0x12, 0x12, 0x0a, 0x04, 0x6d, 0x6f, 0x64, 0x65, 0x18, 0x03, 0x20, 0x01, 0x28,
+	0x14, 0x0a, 0x05, 0x74, 0x6f, 0x6b, 0x65, 0x6e, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05,
-	0x09, 0x52, 0x04, 0x6d, 0x6f, 0x64, 0x65, 0x12, 0x36, 0x0a, 0x0a, 0x63, 0x6f, 0x6e, 0x74, 0x61,
+	0x74, 0x6f, 0x6b, 0x65, 0x6e, 0x22, 0xc3, 0x01, 0x0a, 0x07, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63,
-	0x69, 0x6e, 0x65, 0x72, 0x73, 0x18, 0x04, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x16, 0x2e, 0x61, 0x70,
+	0x65, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69,
-	0x69, 0x2e, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x2e, 0x43, 0x6f, 0x6e, 0x74, 0x61, 0x69,
+	0x64, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52,
-	0x6e, 0x65, 0x72, 0x52, 0x0a, 0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x73, 0x1a,
+	0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x12, 0x0a, 0x04, 0x6d, 0x6f, 0x64, 0x65, 0x18, 0x03, 0x20,
-	0x48, 0x0a, 0x09, 0x43, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x12, 0x1d, 0x0a, 0x0a,
+	0x01, 0x28, 0x09, 0x52, 0x04, 0x6d, 0x6f, 0x64, 0x65, 0x12, 0x36, 0x0a, 0x0a, 0x63, 0x6f, 0x6e,
-	0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x5f, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09,
+	0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x73, 0x18, 0x04, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x16, 0x2e,
-	0x52, 0x09, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x49, 0x64, 0x12, 0x1c, 0x0a, 0x09, 0x63,
+	0x61, 0x70, 0x69, 0x2e, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x2e, 0x43, 0x6f, 0x6e, 0x74,
-	0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x09,
+	0x61, 0x69, 0x6e, 0x65, 0x72, 0x52, 0x0a, 0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72,
-	0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x22, 0x27, 0x0a, 0x15, 0x49, 0x6e, 0x73,
+	0x73, 0x1a, 0x48, 0x0a, 0x09, 0x43, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x12, 0x1d,
-	0x70, 0x65, 0x63, 0x74, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x52, 0x65, 0x71, 0x75, 0x65,
+	0x0a, 0x0a, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x5f, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01,
-	0x73, 0x74, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02,
+	0x28, 0x09, 0x52, 0x09, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x49, 0x64, 0x12, 0x1c, 0x0a,
-	0x69, 0x64, 0x22, 0x40, 0x0a, 0x16, 0x49, 0x6e, 0x73, 0x70, 0x65, 0x63, 0x74, 0x53, 0x65, 0x72,
+	0x09, 0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0c,
-	0x76, 0x69, 0x63, 0x65, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x26, 0x0a, 0x07,
+	0x52, 0x09, 0x63, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x22, 0x27, 0x0a, 0x15, 0x49,
-	0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x0c, 0x2e,
+	0x6e, 0x73, 0x70, 0x65, 0x63, 0x74, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x52, 0x65, 0x71,
-	0x61, 0x70, 0x69, 0x2e, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x52, 0x07, 0x73, 0x65, 0x72,
+	0x75, 0x65, 0x73, 0x74, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09,
-	0x76, 0x69, 0x63, 0x65, 0x32, 0xc0, 0x02, 0x0a, 0x07, 0x4d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65,
+	0x52, 0x02, 0x69, 0x64, 0x22, 0x40, 0x0a, 0x16, 0x49, 0x6e, 0x73, 0x70, 0x65, 0x63, 0x74, 0x53,
-	0x12, 0x40, 0x0a, 0x0b, 0x49, 0x6e, 0x69, 0x74, 0x43, 0x6c, 0x75, 0x73, 0x74, 0x65, 0x72, 0x12,
+	0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x26,
-	0x17, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x6e, 0x69, 0x74, 0x43, 0x6c, 0x75, 0x73, 0x74, 0x65,
+	0x0a, 0x07, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32,
-	0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x18, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49,
+	0x0c, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x52, 0x07, 0x73,
-	0x6e, 0x69, 0x74, 0x43, 0x6c, 0x75, 0x73, 0x74, 0x65, 0x72, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e,
+	0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x32, 0x8f, 0x03, 0x0a, 0x07, 0x4d, 0x61, 0x63, 0x68, 0x69,
-	0x73, 0x65, 0x12, 0x3e, 0x0a, 0x0b, 0x4a, 0x6f, 0x69, 0x6e, 0x43, 0x6c, 0x75, 0x73, 0x74, 0x65,
+	0x6e, 0x65, 0x12, 0x4d, 0x0a, 0x12, 0x43, 0x68, 0x65, 0x63, 0x6b, 0x50, 0x72, 0x65, 0x72, 0x65,
-	0x72, 0x12, 0x17, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x4a, 0x6f, 0x69, 0x6e, 0x43, 0x6c, 0x75, 0x73,
+	0x71, 0x75, 0x69, 0x73, 0x69, 0x74, 0x65, 0x73, 0x12, 0x16, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c,
-	0x74, 0x65, 0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x16, 0x2e, 0x67, 0x6f, 0x6f,
+	0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x45, 0x6d, 0x70, 0x74, 0x79,
-	0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x45, 0x6d, 0x70,
+	0x1a, 0x1f, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x43, 0x68, 0x65, 0x63, 0x6b, 0x50, 0x72, 0x65, 0x72,
-	0x74, 0x79, 0x12, 0x33, 0x0a, 0x05, 0x54, 0x6f, 0x6b, 0x65, 0x6e, 0x12, 0x16, 0x2e, 0x67, 0x6f,
+	0x65, 0x71, 0x75, 0x69, 0x73, 0x69, 0x74, 0x65, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73,
+	0x65, 0x12, 0x40, 0x0a, 0x0b, 0x49, 0x6e, 0x69, 0x74, 0x43, 0x6c, 0x75, 0x73, 0x74, 0x65, 0x72,
+	0x12, 0x17, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x6e, 0x69, 0x74, 0x43, 0x6c, 0x75, 0x73, 0x74,
+	0x65, 0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x18, 0x2e, 0x61, 0x70, 0x69, 0x2e,
+	0x49, 0x6e, 0x69, 0x74, 0x43, 0x6c, 0x75, 0x73, 0x74, 0x65, 0x72, 0x52, 0x65, 0x73, 0x70, 0x6f,
+	0x6e, 0x73, 0x65, 0x12, 0x3e, 0x0a, 0x0b, 0x4a, 0x6f, 0x69, 0x6e, 0x43, 0x6c, 0x75, 0x73, 0x74,
+	0x65, 0x72, 0x12, 0x17, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x4a, 0x6f, 0x69, 0x6e, 0x43, 0x6c, 0x75,
+	0x73, 0x74, 0x65, 0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x16, 0x2e, 0x67, 0x6f,
 	0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x45, 0x6d,
-	0x70, 0x74, 0x79, 0x1a, 0x12, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x54, 0x6f, 0x6b, 0x65, 0x6e, 0x52,
+	0x70, 0x74, 0x79, 0x12, 0x33, 0x0a, 0x05, 0x54, 0x6f, 0x6b, 0x65, 0x6e, 0x12, 0x16, 0x2e, 0x67,
-	0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x33, 0x0a, 0x07, 0x49, 0x6e, 0x73, 0x70, 0x65,
+	0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x45,
-	0x63, 0x74, 0x12, 0x16, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74,
+	0x6d, 0x70, 0x74, 0x79, 0x1a, 0x12, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x54, 0x6f, 0x6b, 0x65, 0x6e,
-	0x6f, 0x62, 0x75, 0x66, 0x2e, 0x45, 0x6d, 0x70, 0x74, 0x79, 0x1a, 0x10, 0x2e, 0x61, 0x70, 0x69,
+	0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x33, 0x0a, 0x07, 0x49, 0x6e, 0x73, 0x70,
-	0x2e, 0x4d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x49, 0x6e, 0x66, 0x6f, 0x12, 0x49, 0x0a, 0x0e,
+	0x65, 0x63, 0x74, 0x12, 0x16, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f,
-	0x49, 0x6e, 0x73, 0x70, 0x65, 0x63, 0x74, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x12, 0x1a,
+	0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x45, 0x6d, 0x70, 0x74, 0x79, 0x1a, 0x10, 0x2e, 0x61, 0x70,
-	0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x6e, 0x73, 0x70, 0x65, 0x63, 0x74, 0x53, 0x65, 0x72, 0x76,
+	0x69, 0x2e, 0x4d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x49, 0x6e, 0x66, 0x6f, 0x12, 0x49, 0x0a,
-	0x69, 0x63, 0x65, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x1b, 0x2e, 0x61, 0x70, 0x69,
+	0x0e, 0x49, 0x6e, 0x73, 0x70, 0x65, 0x63, 0x74, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x12,
-	0x2e, 0x49, 0x6e, 0x73, 0x70, 0x65, 0x63, 0x74, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x52,
+	0x1a, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x49, 0x6e, 0x73, 0x70, 0x65, 0x63, 0x74, 0x53, 0x65, 0x72,
-	0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x37, 0x5a, 0x35, 0x67, 0x69, 0x74, 0x68, 0x75,
+	0x76, 0x69, 0x63, 0x65, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x1b, 0x2e, 0x61, 0x70,
-	0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x70, 0x73, 0x76, 0x69, 0x64, 0x65, 0x72, 0x73, 0x6b, 0x69,
+	0x69, 0x2e, 0x49, 0x6e, 0x73, 0x70, 0x65, 0x63, 0x74, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65,
-	0x2f, 0x75, 0x6e, 0x63, 0x6c, 0x6f, 0x75, 0x64, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x61,
+	0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x37, 0x5a, 0x35, 0x67, 0x69, 0x74, 0x68,
-	0x6c, 0x2f, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x70, 0x62,
+	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x70, 0x73, 0x76, 0x69, 0x64, 0x65, 0x72, 0x73, 0x6b,
-	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x69, 0x2f, 0x75, 0x6e, 0x63, 0x6c, 0x6f, 0x75, 0x64, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e,
+	0x61, 0x6c, 0x2f, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x70,
+	0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -744,48 +811,51 @@ func file_internal_machine_api_pb_machine_proto_rawDescGZIP() []byte {
 	return file_internal_machine_api_pb_machine_proto_rawDescData
 }
 
-var file_internal_machine_api_pb_machine_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
+var file_internal_machine_api_pb_machine_proto_msgTypes = make([]protoimpl.MessageInfo, 11)
 var file_internal_machine_api_pb_machine_proto_goTypes = []any{
-	(*MachineInfo)(nil),            // 0: api.MachineInfo
+	(*CheckPrerequisitesResponse)(nil), // 0: api.CheckPrerequisitesResponse
-	(*NetworkConfig)(nil),          // 1: api.NetworkConfig
+	(*MachineInfo)(nil),                // 1: api.MachineInfo
-	(*InitClusterRequest)(nil),     // 2: api.InitClusterRequest
+	(*NetworkConfig)(nil),              // 2: api.NetworkConfig
-	(*InitClusterResponse)(nil),    // 3: api.InitClusterResponse
+	(*InitClusterRequest)(nil),         // 3: api.InitClusterRequest
-	(*JoinClusterRequest)(nil),     // 4: api.JoinClusterRequest
+	(*InitClusterResponse)(nil),        // 4: api.InitClusterResponse
-	(*TokenResponse)(nil),          // 5: api.TokenResponse
+	(*JoinClusterRequest)(nil),         // 5: api.JoinClusterRequest
-	(*Service)(nil),                // 6: api.Service
+	(*TokenResponse)(nil),              // 6: api.TokenResponse
-	(*InspectServiceRequest)(nil),  // 7: api.InspectServiceRequest
+	(*Service)(nil),                    // 7: api.Service
-	(*InspectServiceResponse)(nil), // 8: api.InspectServiceResponse
+	(*InspectServiceRequest)(nil),      // 8: api.InspectServiceRequest
-	(*Service_Container)(nil),      // 9: api.Service.Container
+	(*InspectServiceResponse)(nil),     // 9: api.InspectServiceResponse
-	(*IP)(nil),                     // 10: api.IP
+	(*Service_Container)(nil),          // 10: api.Service.Container
-	(*IPPrefix)(nil),               // 11: api.IPPrefix
+	(*IP)(nil),                         // 11: api.IP
-	(*IPPort)(nil),                 // 12: api.IPPort
+	(*IPPrefix)(nil),                   // 12: api.IPPrefix
-	(*emptypb.Empty)(nil),          // 13: google.protobuf.Empty
+	(*IPPort)(nil),                     // 13: api.IPPort
+	(*emptypb.Empty)(nil),              // 14: google.protobuf.Empty
 }
 var file_internal_machine_api_pb_machine_proto_depIdxs = []int32{
-	1,  // 0: api.MachineInfo.network:type_name -> api.NetworkConfig
+	2,  // 0: api.MachineInfo.network:type_name -> api.NetworkConfig
-	10, // 1: api.MachineInfo.public_ip:type_name -> api.IP
+	11, // 1: api.MachineInfo.public_ip:type_name -> api.IP
-	11, // 2: api.NetworkConfig.subnet:type_name -> api.IPPrefix
+	12, // 2: api.NetworkConfig.subnet:type_name -> api.IPPrefix
-	10, // 3: api.NetworkConfig.management_ip:type_name -> api.IP
+	11, // 3: api.NetworkConfig.management_ip:type_name -> api.IP
-	12, // 4: api.NetworkConfig.endpoints:type_name -> api.IPPort
+	13, // 4: api.NetworkConfig.endpoints:type_name -> api.IPPort
-	11, // 5: api.InitClusterRequest.network:type_name -> api.IPPrefix
+	12, // 5: api.InitClusterRequest.network:type_name -> api.IPPrefix
-	10, // 6: api.InitClusterRequest.public_ip:type_name -> api.IP
+	11, // 6: api.InitClusterRequest.public_ip:type_name -> api.IP
-	0,  // 7: api.InitClusterResponse.machine:type_name -> api.MachineInfo
+	1,  // 7: api.InitClusterResponse.machine:type_name -> api.MachineInfo
-	0,  // 8: api.JoinClusterRequest.machine:type_name -> api.MachineInfo
+	1,  // 8: api.JoinClusterRequest.machine:type_name -> api.MachineInfo
-	0,  // 9: api.JoinClusterRequest.other_machines:type_name -> api.MachineInfo
+	1,  // 9: api.JoinClusterRequest.other_machines:type_name -> api.MachineInfo
-	9,  // 10: api.Service.containers:type_name -> api.Service.Container
+	10, // 10: api.Service.containers:type_name -> api.Service.Container
-	6,  // 11: api.InspectServiceResponse.service:type_name -> api.Service
+	7,  // 11: api.InspectServiceResponse.service:type_name -> api.Service
-	2,  // 12: api.Machine.InitCluster:input_type -> api.InitClusterRequest
+	14, // 12: api.Machine.CheckPrerequisites:input_type -> google.protobuf.Empty
-	4,  // 13: api.Machine.JoinCluster:input_type -> api.JoinClusterRequest
+	3,  // 13: api.Machine.InitCluster:input_type -> api.InitClusterRequest
-	13, // 14: api.Machine.Token:input_type -> google.protobuf.Empty
+	5,  // 14: api.Machine.JoinCluster:input_type -> api.JoinClusterRequest
-	13, // 15: api.Machine.Inspect:input_type -> google.protobuf.Empty
+	14, // 15: api.Machine.Token:input_type -> google.protobuf.Empty
-	7,  // 16: api.Machine.InspectService:input_type -> api.InspectServiceRequest
+	14, // 16: api.Machine.Inspect:input_type -> google.protobuf.Empty
-	3,  // 17: api.Machine.InitCluster:output_type -> api.InitClusterResponse
+	8,  // 17: api.Machine.InspectService:input_type -> api.InspectServiceRequest
-	13, // 18: api.Machine.JoinCluster:output_type -> google.protobuf.Empty
+	0,  // 18: api.Machine.CheckPrerequisites:output_type -> api.CheckPrerequisitesResponse
-	5,  // 19: api.Machine.Token:output_type -> api.TokenResponse
+	4,  // 19: api.Machine.InitCluster:output_type -> api.InitClusterResponse
-	0,  // 20: api.Machine.Inspect:output_type -> api.MachineInfo
+	14, // 20: api.Machine.JoinCluster:output_type -> google.protobuf.Empty
-	8,  // 21: api.Machine.InspectService:output_type -> api.InspectServiceResponse
+	6,  // 21: api.Machine.Token:output_type -> api.TokenResponse
-	17, // [17:22] is the sub-list for method output_type
+	1,  // 22: api.Machine.Inspect:output_type -> api.MachineInfo
-	12, // [12:17] is the sub-list for method input_type
+	9,  // 23: api.Machine.InspectService:output_type -> api.InspectServiceResponse
+	18, // [18:24] is the sub-list for method output_type
+	12, // [12:18] is the sub-list for method input_type
 	12, // [12:12] is the sub-list for extension type_name
 	12, // [12:12] is the sub-list for extension extendee
 	0,  // [0:12] is the sub-list for field type_name
@@ -799,7 +869,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 	file_internal_machine_api_pb_common_proto_init()
 	if !protoimpl.UnsafeEnabled {
 		file_internal_machine_api_pb_machine_proto_msgTypes[0].Exporter = func(v any, i int) any {
-			switch v := v.(*MachineInfo); i {
+			switch v := v.(*CheckPrerequisitesResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -811,7 +881,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[1].Exporter = func(v any, i int) any {
-			switch v := v.(*NetworkConfig); i {
+			switch v := v.(*MachineInfo); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -823,7 +893,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[2].Exporter = func(v any, i int) any {
-			switch v := v.(*InitClusterRequest); i {
+			switch v := v.(*NetworkConfig); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -835,7 +905,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[3].Exporter = func(v any, i int) any {
-			switch v := v.(*InitClusterResponse); i {
+			switch v := v.(*InitClusterRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -847,7 +917,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[4].Exporter = func(v any, i int) any {
-			switch v := v.(*JoinClusterRequest); i {
+			switch v := v.(*InitClusterResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -859,7 +929,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[5].Exporter = func(v any, i int) any {
-			switch v := v.(*TokenResponse); i {
+			switch v := v.(*JoinClusterRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -871,7 +941,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[6].Exporter = func(v any, i int) any {
-			switch v := v.(*Service); i {
+			switch v := v.(*TokenResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -883,7 +953,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[7].Exporter = func(v any, i int) any {
-			switch v := v.(*InspectServiceRequest); i {
+			switch v := v.(*Service); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -895,7 +965,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[8].Exporter = func(v any, i int) any {
-			switch v := v.(*InspectServiceResponse); i {
+			switch v := v.(*InspectServiceRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -907,6 +977,18 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[9].Exporter = func(v any, i int) any {
+			switch v := v.(*InspectServiceResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_internal_machine_api_pb_machine_proto_msgTypes[10].Exporter = func(v any, i int) any {
 			switch v := v.(*Service_Container); i {
 			case 0:
 				return &v.state
@@ -919,7 +1001,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 	}
-	file_internal_machine_api_pb_machine_proto_msgTypes[2].OneofWrappers = []any{
+	file_internal_machine_api_pb_machine_proto_msgTypes[3].OneofWrappers = []any{
 		(*InitClusterRequest_PublicIp)(nil),
 		(*InitClusterRequest_PublicIpAuto)(nil),
 	}
@@ -929,7 +1011,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_internal_machine_api_pb_machine_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   10,
+			NumMessages:   11,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

internal/machine/api/pb/machine.proto

@@ -8,6 +8,8 @@ import "google/protobuf/empty.proto";
 import "internal/machine/api/pb/common.proto";
 
 service Machine {
+  // CheckPrerequisites verifies if the machine meets all necessary system requirements to participate in the cluster.
+  rpc CheckPrerequisites(google.protobuf.Empty) returns (CheckPrerequisitesResponse);
   rpc InitCluster(InitClusterRequest) returns (InitClusterResponse);
   rpc JoinCluster(JoinClusterRequest) returns (google.protobuf.Empty);
   rpc Token(google.protobuf.Empty) returns (TokenResponse);
@@ -29,6 +31,13 @@ message NetworkConfig {
   bytes public_key = 4;
 }
 
+message CheckPrerequisitesResponse {
+  // Overall status of the checks.
+  bool satisfied = 1;
+  // Error message if not satisfied (empty if all checks pass).
+  string error = 2;
+}
+
 message InitClusterRequest {
   string machineName = 1;
   IPPrefix network = 2;

internal/machine/api/pb/machine_grpc.pb.go

@@ -20,17 +20,19 @@ import (
 const _ = grpc.SupportPackageIsVersion9
 
 const (
-	Machine_InitCluster_FullMethodName    = "/api.Machine/InitCluster"
+	Machine_CheckPrerequisites_FullMethodName = "/api.Machine/CheckPrerequisites"
-	Machine_JoinCluster_FullMethodName    = "/api.Machine/JoinCluster"
+	Machine_InitCluster_FullMethodName        = "/api.Machine/InitCluster"
-	Machine_Token_FullMethodName          = "/api.Machine/Token"
+	Machine_JoinCluster_FullMethodName        = "/api.Machine/JoinCluster"
-	Machine_Inspect_FullMethodName        = "/api.Machine/Inspect"
+	Machine_Token_FullMethodName              = "/api.Machine/Token"
-	Machine_InspectService_FullMethodName = "/api.Machine/InspectService"
+	Machine_Inspect_FullMethodName            = "/api.Machine/Inspect"
+	Machine_InspectService_FullMethodName     = "/api.Machine/InspectService"
 )
 
 // MachineClient is the client API for Machine service.
 //
 // 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 MachineClient interface {
+	CheckPrerequisites(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*CheckPrerequisitesResponse, error)
 	InitCluster(ctx context.Context, in *InitClusterRequest, opts ...grpc.CallOption) (*InitClusterResponse, error)
 	JoinCluster(ctx context.Context, in *JoinClusterRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
 	Token(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*TokenResponse, error)
@@ -46,6 +48,16 @@ func NewMachineClient(cc grpc.ClientConnInterface) MachineClient {
 	return &machineClient{cc}
 }
 
+func (c *machineClient) CheckPrerequisites(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*CheckPrerequisitesResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(CheckPrerequisitesResponse)
+	err := c.cc.Invoke(ctx, Machine_CheckPrerequisites_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *machineClient) InitCluster(ctx context.Context, in *InitClusterRequest, opts ...grpc.CallOption) (*InitClusterResponse, error) {
 	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
 	out := new(InitClusterResponse)
@@ -100,6 +112,7 @@ func (c *machineClient) InspectService(ctx context.Context, in *InspectServiceRe
 // All implementations must embed UnimplementedMachineServer
 // for forward compatibility.
 type MachineServer interface {
+	CheckPrerequisites(context.Context, *emptypb.Empty) (*CheckPrerequisitesResponse, error)
 	InitCluster(context.Context, *InitClusterRequest) (*InitClusterResponse, error)
 	JoinCluster(context.Context, *JoinClusterRequest) (*emptypb.Empty, error)
 	Token(context.Context, *emptypb.Empty) (*TokenResponse, error)
@@ -115,6 +128,9 @@ type MachineServer interface {
 // pointer dereference when methods are called.
 type UnimplementedMachineServer struct{}
 
+func (UnimplementedMachineServer) CheckPrerequisites(context.Context, *emptypb.Empty) (*CheckPrerequisitesResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CheckPrerequisites not implemented")
+}
 func (UnimplementedMachineServer) InitCluster(context.Context, *InitClusterRequest) (*InitClusterResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method InitCluster not implemented")
 }
@@ -151,6 +167,24 @@ func RegisterMachineServer(s grpc.ServiceRegistrar, srv MachineServer) {
 	s.RegisterService(&Machine_ServiceDesc, srv)
 }
 
+func _Machine_CheckPrerequisites_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(emptypb.Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(MachineServer).CheckPrerequisites(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Machine_CheckPrerequisites_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(MachineServer).CheckPrerequisites(ctx, req.(*emptypb.Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _Machine_InitCluster_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(InitClusterRequest)
 	if err := dec(in); err != nil {
@@ -248,6 +282,10 @@ var Machine_ServiceDesc = grpc.ServiceDesc{
 	ServiceName: "api.Machine",
 	HandlerType: (*MachineServer)(nil),
 	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "CheckPrerequisites",
+			Handler:    _Machine_CheckPrerequisites_Handler,
+		},
 		{
 			MethodName: "InitCluster",
 			Handler:    _Machine_InitCluster_Handler,

internal/machine/dns/server.go

@@ -20,8 +20,8 @@ const (
 	// InternalDomain is the cluster internal domain for service discovery. All DNS queries ending with this suffix
 	// will be resolved using the internal DNS server.
 	InternalDomain = "internal."
-	// dnsPort is the standard DNS port.
+	// Port is the standard DNS port.
-	dnsPort = 53
+	Port = 53
 	// maxConcurrentForwards is the maximum number of concurrent forwarded queries to upstream DNS servers.
 	// 1024 is the default used by the Docker internal DNS server.
 	maxConcurrentForwards = 1024
@@ -72,15 +72,15 @@ func NewServer(listenAddr netip.Addr, resolver Resolver, upstreams []netip.AddrP
 					// to not create a forwarding loop.
 					continue
 				}
-				upstreams = append(upstreams, netip.AddrPortFrom(ns, dnsPort))
+				upstreams = append(upstreams, netip.AddrPortFrom(ns, Port))
 			}
 		}
 
 		// Fallback to common public DNS servers if no nameservers were found in /etc/resolv.conf.
 		if upstreams == nil {
 			upstreams = []netip.AddrPort{
-				netip.AddrPortFrom(netip.MustParseAddr("1.1.1.1"), dnsPort), // Cloudflare DNS
+				netip.AddrPortFrom(netip.MustParseAddr("1.1.1.1"), Port), // Cloudflare DNS
-				netip.AddrPortFrom(netip.MustParseAddr("8.8.8.8"), dnsPort), // Google DNS
+				netip.AddrPortFrom(netip.MustParseAddr("8.8.8.8"), Port), // Google DNS
 			}
 		}
 	}
@@ -97,7 +97,7 @@ func NewServer(listenAddr netip.Addr, resolver Resolver, upstreams []netip.AddrP
 // Run starts the DNS server listening on both UDP and TCP ports. The server on TCP is not critical so it won't return
 // an error if it fails to start. The server will run until the context is canceled or an error occurs.
 func (s *Server) Run(ctx context.Context) error {
-	addr := net.JoinHostPort(s.listenAddr.String(), strconv.Itoa(dnsPort))
+	addr := net.JoinHostPort(s.listenAddr.String(), strconv.Itoa(Port))
 	s.udpServer = &dns.Server{
 		Addr:    addr,
 		Net:     "udp",

internal/machine/machine.go

@@ -359,6 +359,8 @@ func (m *Machine) Run(ctx context.Context) error {
 					var err error
 
 					m.cluster.UpdateMachineID(m.state.ID)
+					// TODO: set DNS server to m.IP() on the docker server so it knows which addr to pass as --dns
+					//  for service containers.
 
 					// Ensure the corrosion config is up to date, including a new gossip address if the machine
 					// has just joined a cluster.
@@ -540,6 +542,38 @@ func (m *Machine) configureCorrosion() error {
 	return nil
 }
 
+// CheckPrerequisites verifies if the machine meets all necessary system requirements to participate in the cluster.
+func (m *Machine) CheckPrerequisites(ctx context.Context, _ *emptypb.Empty) (*pb.CheckPrerequisitesResponse, error) {
+	// Check DNS port (UDP) availability.
+	if err := checkDNSPortAvailable(); err != nil {
+		return &pb.CheckPrerequisitesResponse{
+			Satisfied: false,
+			Error:     err.Error(),
+		}, nil
+	}
+
+	return &pb.CheckPrerequisitesResponse{
+		Satisfied: true,
+	}, nil
+}
+
+// checkDNSPortAvailable verifies that DNS port 53/udp is available for Uncloud's embedded DNS service.
+func checkDNSPortAvailable() error {
+	addr := &net.UDPAddr{
+		IP:   net.IPv4(127, 0, 0, 210), // Use a unique loopback address to avoid conflicts.
+		Port: dns.Port,
+	}
+	conn, err := net.ListenUDP("udp", addr)
+	if err != nil {
+		return fmt.Errorf("DNS port %d/udp is already in use by another service: %w. Uncloud needs this port "+
+			"to run the embedded internal DNS service on WireGuard interface 'uncloud'. Please reconfigure "+
+			"any DNS servers (like dnsmasq, systemd-resolved, or named) that might be listening on all network "+
+			"interfaces (0.0.0.0) on the machine and try again", dns.Port, err)
+	}
+	conn.Close()
+	return nil
+}
+
 // InitCluster initialises a new cluster on the local machine with the provided network configuration.
 func (m *Machine) InitCluster(ctx context.Context, req *pb.InitClusterRequest) (*pb.InitClusterResponse, error) {
 	if m.Initialised() {