Implement grpc server in the daemon to receive cluster requests

Makefile

@@ -0,0 +1,9 @@
+.PHONY: build
+uncloudd-dev1:
+	GOOS=linux GOARCH=amd64 go build -o uncloudd-linux-amd64 cmd/uncloudd/main.go && \
+		scp uncloudd-linux-amd64 spy@192.168.40.243:~/ && \
+		ssh spy@192.168.40.243 sudo install ./uncloudd-linux-amd64 /usr/local/bin/uncloudd
+
+.PHONY: proto
+proto:
+	protoc --go_out=. --go_opt=paths=source_relative --go-grpc_out=. --go-grpc_opt=paths=source_relative internal/machine/cluster/pb/cluster.proto

go.mod

@@ -131,8 +131,8 @@ require (
 	golang.org/x/text v0.17.0 // indirect
 	golang.org/x/tools v0.24.0 // indirect
 	golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240617180043-68d350f18fd4 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240826202546-f6391c0de4c7 // indirect
-	google.golang.org/grpc v1.64.0 // indirect
+	google.golang.org/grpc v1.65.0 // indirect
 	google.golang.org/protobuf v1.34.2 // indirect
 	gotest.tools/v3 v3.5.1 // indirect
 	lukechampine.com/blake3 v1.3.0 // indirect

go.sum

@@ -732,6 +732,8 @@ google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20240617180043-68d350f18fd4 h1:Di6ANFilr+S60a4S61ZM00vLdw0IrQOSMS2/6mrnOU0=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20240617180043-68d350f18fd4/go.mod h1:Ue6ibwXGpU+dqIcODieyLOcgj7z8+IcskoNIgZxtrFY=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240826202546-f6391c0de4c7 h1:2035KHhUv+EpyB+hWgJnaWKJOdX1E95w2S8Rr4uWKTs=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240826202546-f6391c0de4c7/go.mod h1:UqMtugtsSgubUsoxbuAoiCXvqvErP7Gf0so0mK9tHxU=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
@@ -740,6 +742,8 @@ google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8
 google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
 google.golang.org/grpc v1.64.0 h1:KH3VH9y/MgNQg1dE7b3XfVK0GsPSIzJwdF617gUSbvY=
 google.golang.org/grpc v1.64.0/go.mod h1:oxjF8E3FBnjp+/gVFYdWacaLDx9na1aqy9oovLpxQYg=
+google.golang.org/grpc v1.65.0 h1:bs/cUb4lp1G5iImFFd3u5ixQzweKizoZJAwBNLR42lc=
+google.golang.org/grpc v1.65.0/go.mod h1:WgYC2ypjlB0EiQi6wdKixMqukr6lBc0Vo+oOgjrM5ZQ=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=

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

@@ -0,0 +1,468 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.34.2
+// 	protoc        v5.27.3
+// source: internal/machine/cluster/pb/cluster.proto
+
+package pb
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type MachineInfo struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Id        []byte    `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Name      string    `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
+	Subnet    *IPPrefix `protobuf:"bytes,3,opt,name=subnet,proto3" json:"subnet,omitempty"`
+	Endpoints []*IPPort `protobuf:"bytes,4,rep,name=endpoints,proto3" json:"endpoints,omitempty"`
+	PublicKey []byte    `protobuf:"bytes,5,opt,name=publicKey,proto3" json:"publicKey,omitempty"`
+}
+
+func (x *MachineInfo) Reset() {
+	*x = MachineInfo{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_internal_machine_cluster_pb_cluster_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *MachineInfo) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MachineInfo) ProtoMessage() {}
+
+func (x *MachineInfo) ProtoReflect() protoreflect.Message {
+	mi := &file_internal_machine_cluster_pb_cluster_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 MachineInfo.ProtoReflect.Descriptor instead.
+func (*MachineInfo) Descriptor() ([]byte, []int) {
+	return file_internal_machine_cluster_pb_cluster_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *MachineInfo) GetId() []byte {
+	if x != nil {
+		return x.Id
+	}
+	return nil
+}
+
+func (x *MachineInfo) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *MachineInfo) GetSubnet() *IPPrefix {
+	if x != nil {
+		return x.Subnet
+	}
+	return nil
+}
+
+func (x *MachineInfo) GetEndpoints() []*IPPort {
+	if x != nil {
+		return x.Endpoints
+	}
+	return nil
+}
+
+func (x *MachineInfo) GetPublicKey() []byte {
+	if x != nil {
+		return x.PublicKey
+	}
+	return nil
+}
+
+type AddMachineRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Machine *MachineInfo `protobuf:"bytes,1,opt,name=machine,proto3" json:"machine,omitempty"`
+}
+
+func (x *AddMachineRequest) Reset() {
+	*x = AddMachineRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_internal_machine_cluster_pb_cluster_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *AddMachineRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AddMachineRequest) ProtoMessage() {}
+
+func (x *AddMachineRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_internal_machine_cluster_pb_cluster_proto_msgTypes[1]
+	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 AddMachineRequest.ProtoReflect.Descriptor instead.
+func (*AddMachineRequest) Descriptor() ([]byte, []int) {
+	return file_internal_machine_cluster_pb_cluster_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *AddMachineRequest) GetMachine() *MachineInfo {
+	if x != nil {
+		return x.Machine
+	}
+	return nil
+}
+
+type AddMachineResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Machine *MachineInfo `protobuf:"bytes,1,opt,name=machine,proto3" json:"machine,omitempty"`
+}
+
+func (x *AddMachineResponse) Reset() {
+	*x = AddMachineResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_internal_machine_cluster_pb_cluster_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *AddMachineResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AddMachineResponse) ProtoMessage() {}
+
+func (x *AddMachineResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_internal_machine_cluster_pb_cluster_proto_msgTypes[2]
+	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 AddMachineResponse.ProtoReflect.Descriptor instead.
+func (*AddMachineResponse) Descriptor() ([]byte, []int) {
+	return file_internal_machine_cluster_pb_cluster_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *AddMachineResponse) GetMachine() *MachineInfo {
+	if x != nil {
+		return x.Machine
+	}
+	return nil
+}
+
+type IPPort struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Ip   []byte `protobuf:"bytes,1,opt,name=ip,proto3" json:"ip,omitempty"`
+	Port int32  `protobuf:"varint,2,opt,name=port,proto3" json:"port,omitempty"`
+}
+
+func (x *IPPort) Reset() {
+	*x = IPPort{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_internal_machine_cluster_pb_cluster_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *IPPort) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*IPPort) ProtoMessage() {}
+
+func (x *IPPort) ProtoReflect() protoreflect.Message {
+	mi := &file_internal_machine_cluster_pb_cluster_proto_msgTypes[3]
+	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 IPPort.ProtoReflect.Descriptor instead.
+func (*IPPort) Descriptor() ([]byte, []int) {
+	return file_internal_machine_cluster_pb_cluster_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *IPPort) GetIp() []byte {
+	if x != nil {
+		return x.Ip
+	}
+	return nil
+}
+
+func (x *IPPort) GetPort() int32 {
+	if x != nil {
+		return x.Port
+	}
+	return 0
+}
+
+type IPPrefix struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Ip   []byte `protobuf:"bytes,1,opt,name=ip,proto3" json:"ip,omitempty"`
+	Bits int32  `protobuf:"varint,2,opt,name=bits,proto3" json:"bits,omitempty"`
+}
+
+func (x *IPPrefix) Reset() {
+	*x = IPPrefix{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_internal_machine_cluster_pb_cluster_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *IPPrefix) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*IPPrefix) ProtoMessage() {}
+
+func (x *IPPrefix) ProtoReflect() protoreflect.Message {
+	mi := &file_internal_machine_cluster_pb_cluster_proto_msgTypes[4]
+	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 IPPrefix.ProtoReflect.Descriptor instead.
+func (*IPPrefix) Descriptor() ([]byte, []int) {
+	return file_internal_machine_cluster_pb_cluster_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *IPPrefix) GetIp() []byte {
+	if x != nil {
+		return x.Ip
+	}
+	return nil
+}
+
+func (x *IPPrefix) GetBits() int32 {
+	if x != nil {
+		return x.Bits
+	}
+	return 0
+}
+
+var File_internal_machine_cluster_pb_cluster_proto protoreflect.FileDescriptor
+
+var file_internal_machine_cluster_pb_cluster_proto_rawDesc = []byte{
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+}
+
+var (
+	file_internal_machine_cluster_pb_cluster_proto_rawDescOnce sync.Once
+	file_internal_machine_cluster_pb_cluster_proto_rawDescData = file_internal_machine_cluster_pb_cluster_proto_rawDesc
+)
+
+func file_internal_machine_cluster_pb_cluster_proto_rawDescGZIP() []byte {
+	file_internal_machine_cluster_pb_cluster_proto_rawDescOnce.Do(func() {
+		file_internal_machine_cluster_pb_cluster_proto_rawDescData = protoimpl.X.CompressGZIP(file_internal_machine_cluster_pb_cluster_proto_rawDescData)
+	})
+	return file_internal_machine_cluster_pb_cluster_proto_rawDescData
+}
+
+var file_internal_machine_cluster_pb_cluster_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
+var file_internal_machine_cluster_pb_cluster_proto_goTypes = []any{
+	(*MachineInfo)(nil),        // 0: cluster.MachineInfo
+	(*AddMachineRequest)(nil),  // 1: cluster.AddMachineRequest
+	(*AddMachineResponse)(nil), // 2: cluster.AddMachineResponse
+	(*IPPort)(nil),             // 3: cluster.IPPort
+	(*IPPrefix)(nil),           // 4: cluster.IPPrefix
+}
+var file_internal_machine_cluster_pb_cluster_proto_depIdxs = []int32{
+	4, // 0: cluster.MachineInfo.subnet:type_name -> cluster.IPPrefix
+	3, // 1: cluster.MachineInfo.endpoints:type_name -> cluster.IPPort
+	0, // 2: cluster.AddMachineRequest.machine:type_name -> cluster.MachineInfo
+	0, // 3: cluster.AddMachineResponse.machine:type_name -> cluster.MachineInfo
+	1, // 4: cluster.Cluster.AddMachine:input_type -> cluster.AddMachineRequest
+	2, // 5: cluster.Cluster.AddMachine:output_type -> cluster.AddMachineResponse
+	5, // [5:6] is the sub-list for method output_type
+	4, // [4:5] is the sub-list for method input_type
+	4, // [4:4] is the sub-list for extension type_name
+	4, // [4:4] is the sub-list for extension extendee
+	0, // [0:4] is the sub-list for field type_name
+}
+
+func init() { file_internal_machine_cluster_pb_cluster_proto_init() }
+func file_internal_machine_cluster_pb_cluster_proto_init() {
+	if File_internal_machine_cluster_pb_cluster_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_internal_machine_cluster_pb_cluster_proto_msgTypes[0].Exporter = func(v any, i int) any {
+			switch v := v.(*MachineInfo); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_internal_machine_cluster_pb_cluster_proto_msgTypes[1].Exporter = func(v any, i int) any {
+			switch v := v.(*AddMachineRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_internal_machine_cluster_pb_cluster_proto_msgTypes[2].Exporter = func(v any, i int) any {
+			switch v := v.(*AddMachineResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_internal_machine_cluster_pb_cluster_proto_msgTypes[3].Exporter = func(v any, i int) any {
+			switch v := v.(*IPPort); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_internal_machine_cluster_pb_cluster_proto_msgTypes[4].Exporter = func(v any, i int) any {
+			switch v := v.(*IPPrefix); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_internal_machine_cluster_pb_cluster_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   5,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_internal_machine_cluster_pb_cluster_proto_goTypes,
+		DependencyIndexes: file_internal_machine_cluster_pb_cluster_proto_depIdxs,
+		MessageInfos:      file_internal_machine_cluster_pb_cluster_proto_msgTypes,
+	}.Build()
+	File_internal_machine_cluster_pb_cluster_proto = out.File
+	file_internal_machine_cluster_pb_cluster_proto_rawDesc = nil
+	file_internal_machine_cluster_pb_cluster_proto_goTypes = nil
+	file_internal_machine_cluster_pb_cluster_proto_depIdxs = nil
+}

internal/machine/api/pb/cluster.proto

@@ -0,0 +1,35 @@
+syntax = "proto3";
+
+package cluster;
+
+option go_package = "github.com/psviderski/uncloud/internal/machine/cluster/pb";
+
+service Cluster {
+  rpc AddMachine(AddMachineRequest) returns (AddMachineResponse);
+}
+
+message MachineInfo {
+  bytes id = 1;
+  string name = 2;
+  IPPrefix subnet = 3;
+  repeated IPPort endpoints = 4;
+  bytes publicKey = 5;
+}
+
+message AddMachineRequest {
+  MachineInfo machine = 1;
+}
+
+message AddMachineResponse {
+  MachineInfo machine = 1;
+}
+
+message IPPort {
+  bytes ip = 1;
+  int32 port = 2;
+}
+
+message IPPrefix {
+  bytes ip = 1;
+  int32 bits = 2;
+}

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

@@ -0,0 +1,121 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.5.1
+// - protoc             v5.27.3
+// source: internal/machine/cluster/pb/cluster.proto
+
+package pb
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.64.0 or later.
+const _ = grpc.SupportPackageIsVersion9
+
+const (
+	Cluster_AddMachine_FullMethodName = "/cluster.Cluster/AddMachine"
+)
+
+// ClusterClient is the client API for Cluster 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 ClusterClient interface {
+	AddMachine(ctx context.Context, in *AddMachineRequest, opts ...grpc.CallOption) (*AddMachineResponse, error)
+}
+
+type clusterClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewClusterClient(cc grpc.ClientConnInterface) ClusterClient {
+	return &clusterClient{cc}
+}
+
+func (c *clusterClient) AddMachine(ctx context.Context, in *AddMachineRequest, opts ...grpc.CallOption) (*AddMachineResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(AddMachineResponse)
+	err := c.cc.Invoke(ctx, Cluster_AddMachine_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// ClusterServer is the server API for Cluster service.
+// All implementations must embed UnimplementedClusterServer
+// for forward compatibility.
+type ClusterServer interface {
+	AddMachine(context.Context, *AddMachineRequest) (*AddMachineResponse, error)
+	mustEmbedUnimplementedClusterServer()
+}
+
+// UnimplementedClusterServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedClusterServer struct{}
+
+func (UnimplementedClusterServer) AddMachine(context.Context, *AddMachineRequest) (*AddMachineResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method AddMachine not implemented")
+}
+func (UnimplementedClusterServer) mustEmbedUnimplementedClusterServer() {}
+func (UnimplementedClusterServer) testEmbeddedByValue()                 {}
+
+// UnsafeClusterServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to ClusterServer will
+// result in compilation errors.
+type UnsafeClusterServer interface {
+	mustEmbedUnimplementedClusterServer()
+}
+
+func RegisterClusterServer(s grpc.ServiceRegistrar, srv ClusterServer) {
+	// If the following call pancis, it indicates UnimplementedClusterServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&Cluster_ServiceDesc, srv)
+}
+
+func _Cluster_AddMachine_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(AddMachineRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ClusterServer).AddMachine(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Cluster_AddMachine_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ClusterServer).AddMachine(ctx, req.(*AddMachineRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// Cluster_ServiceDesc is the grpc.ServiceDesc for Cluster service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Cluster_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "cluster.Cluster",
+	HandlerType: (*ClusterServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "AddMachine",
+			Handler:    _Cluster_AddMachine_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "internal/machine/cluster/pb/cluster.proto",
+}

internal/machine/api/server.go

@@ -0,0 +1,20 @@
+package api
+
+import (
+	"context"
+	pb2 "uncloud/internal/machine/api/pb"
+)
+
+// Server is the gRPC server for the Cluster service.
+type Server struct {
+	pb2.UnimplementedClusterServer
+}
+
+func NewServer() *Server {
+	return &Server{}
+}
+
+// AddMachine adds a machine to the cluster.
+func (s *Server) AddMachine(ctx context.Context, req *pb2.AddMachineRequest) (*pb2.AddMachineResponse, error) {
+	return &pb2.AddMachineResponse{}, nil
+}

internal/machine/daemon/daemon.go

@@ -3,10 +3,20 @@ package daemon
 import (
 	"context"
 	"fmt"
+	"golang.org/x/sync/errgroup"
+	"google.golang.org/grpc"
+	"log/slog"
+	"net"
 	"uncloud/internal/machine"
+	"uncloud/internal/machine/api"
+	"uncloud/internal/machine/api/pb"
 	"uncloud/internal/machine/network"
 )
 
+const (
+	MachineAPIPort = 51000
+)
+
 func Run(ctx context.Context, dataDir string) error {
 	cfg, err := machine.ParseConfig(machine.ConfigPath(dataDir))
 	if err != nil {
@@ -30,5 +40,38 @@ func Run(ctx context.Context, dataDir string) error {
 	//}
 	//fmt.Println("Addresses:", addrs)
 
-	return wgnet.Run(ctx)
+	addr := fmt.Sprintf("127.0.0.1:%d", MachineAPIPort)
+	listener, err := net.Listen("tcp", addr)
+	if err != nil {
+		return fmt.Errorf("listen API port: %w", err)
+	}
+	grpcServer := grpc.NewServer()
+	pb.RegisterClusterServer(grpcServer, api.NewServer())
+
+	// Use an errgroup to coordinate error handling and graceful shutdown of multiple daemon components.
+	errGroup, ctx := errgroup.WithContext(ctx)
+	errGroup.Go(func() error {
+		slog.Info("Starting API server.", "addr", addr)
+		if sErr := grpcServer.Serve(listener); sErr != nil {
+			return fmt.Errorf("API server failed: %w", sErr)
+		}
+		return nil
+	})
+	errGroup.Go(func() error {
+		if err = wgnet.Run(ctx); err != nil {
+			return fmt.Errorf("WireGuard network failed: %w", err)
+		}
+		return nil
+	})
+	// Shutdown goroutine.
+	errGroup.Go(func() error {
+		<-ctx.Done()
+		slog.Info("Stopping API server.")
+		// TODO: implement timeout for graceful shutdown.
+		grpcServer.GracefulStop()
+		slog.Info("API server stopped.")
+		return nil
+	})
+
+	return errGroup.Wait()
 }