add Token RPC endpoint to grab a machine token for adding it to a cluster

Makefile

@@ -1,11 +1,15 @@
 .PHONY: build
-uncloudd-dev1:
+uncloud-dev:
 	GOOS=linux GOARCH=amd64 go build -o uncloudd-linux-amd64 ./cmd/uncloudd && \
 		scp uncloudd-linux-amd64 spy@192.168.40.243:~/ && \
 		ssh spy@192.168.40.243 sudo install ./uncloudd-linux-amd64 /usr/local/bin/uncloudd
+		scp uncloudd-linux-amd64 spy@192.168.40.176:~/ && \
+		ssh spy@192.168.40.176 sudo install ./uncloudd-linux-amd64 /usr/local/bin/uncloudd
 	GOOS=linux GOARCH=amd64 go build -o uncloud-linux-amd64 ./cmd/uncloud && \
 		scp uncloud-linux-amd64 spy@192.168.40.243:~/ && \
 		ssh spy@192.168.40.243 sudo install ./uncloud-linux-amd64 /usr/local/bin/uncloud
+		scp uncloud-linux-amd64 spy@192.168.40.176:~/ && \
+		ssh spy@192.168.40.176 sudo install ./uncloud-linux-amd64 /usr/local/bin/uncloud
 
 .PHONY: proto
 proto:

internal/cli/cli.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"google.golang.org/protobuf/types/known/emptypb"
 	"net/netip"
 	"uncloud/internal/cli/client"
 	"uncloud/internal/cli/client/connector"
@@ -201,6 +202,7 @@ func (cli *CLI) AddMachine(ctx context.Context, remoteMachine RemoteMachine, clu
 		_ = c.Close()
 	}()
 
+	// Create a command executor and a machine API client over the SSH connection to the remote machine.
 	sshClient, err := sshexec.Connect(remoteMachine.User, remoteMachine.Host, remoteMachine.Port, remoteMachine.KeyPath)
 	if err != nil {
 		return fmt.Errorf(
@@ -210,12 +212,12 @@ func (cli *CLI) AddMachine(ctx context.Context, remoteMachine RemoteMachine, clu
 	}
 	machineExec := sshexec.NewRemote(sshClient)
 
+	conn := connector.NewSSHConnectorFromClient(sshClient)
+	machineClient, err := client.New(ctx, conn)
+	if err != nil {
+		return fmt.Errorf("connect to remote machine API: %w", err)
+	}
 	// TODO: Check if the machine is already provisioned using machineClient and ask the user to reset it first.
-	//conn := connector.NewSSHConnectorFromClient(sshClient)
-	//machineClient, err := client.New(ctx, conn)
-	//if err != nil {
-	//	return fmt.Errorf("connect to remote machine API: %w", err)
-	//}
 
 	// TODO: Download and install the latest uncloudd binary by running the install shell script from GitHub.
 	//  For now upload the binary using scp manually.
@@ -223,6 +225,14 @@ func (cli *CLI) AddMachine(ctx context.Context, remoteMachine RemoteMachine, clu
 		return fmt.Errorf("uncloudd binary not found on the remote machine: %w", err)
 	}
 
+	resp, err := machineClient.Token(ctx, &emptypb.Empty{})
+	if err != nil {
+		return fmt.Errorf("get remote machine token: %w", err)
+	}
+	token := resp.Token
+
+	fmt.Println("Token:", token)
+
 	//req := &pb.AddMachineRequest{
 	//	Name: machineName,
 	//	Network: &pb.NetworkConfig{

internal/cli/client/connector/ssh.go

@@ -28,17 +28,7 @@ type SSHConnector struct {
 }
 
 func NewSSHConnector(cfg *SSHConnectorConfig) *SSHConnector {
-	c := &SSHConnector{config: *cfg}
+	return &SSHConnector{config: *cfg}
-	if c.config.User == "" {
-		c.config.User = "root"
-	}
-	if c.config.Port == 0 {
-		c.config.Port = 22
-	}
-	if c.config.APISockPath == "" {
-		c.config.APISockPath = machine.DefaultAPISockPath
-	}
-	return c
 }
 
 func NewSSHConnectorFromClient(client *ssh.Client) *SSHConnector {
@@ -59,8 +49,12 @@ func (c *SSHConnector) Connect(ctx context.Context) (*grpc.ClientConn, error) {
 		}
 	}
 
+	apiSockPath := c.config.APISockPath
+	if apiSockPath == "" {
+		apiSockPath = machine.DefaultAPISockPath
+	}
 	conn, err := grpc.NewClient(
-		"unix://"+c.config.APISockPath,
+		"unix://"+apiSockPath,
 		grpc.WithTransportCredentials(insecure.NewCredentials()),
 		grpc.WithContextDialer(
 			func(ctx context.Context, addr string) (net.Conn, error) {
@@ -68,9 +62,10 @@ func (c *SSHConnector) Connect(ctx context.Context) (*grpc.ClientConn, error) {
 				conn, dErr := c.client.DialContext(ctx, "unix", addr)
 				if dErr != nil {
 					return nil, fmt.Errorf(
-						"connect to machine API socket %s through SSH tunnel (is the Uncloud daemon running "+
+						"connect to machine API socket '%s' through SSH tunnel (is the Uncloud daemon running "+
-							"on the remote machine and does the SSH user have permissions to access the socket?): %w",
+							"on the remote machine and does the SSH user '%s' have permissions to access the socket?):"+
-						addr, dErr,
+							" %w",
+						addr, c.client.User(), dErr,
 					)
 				}
 				return conn, nil

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

@@ -9,6 +9,7 @@ package pb
 import (
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	emptypb "google.golang.org/protobuf/types/known/emptypb"
 	reflect "reflect"
 	sync "sync"
 )
@@ -130,38 +131,93 @@ func (x *InitClusterResponse) GetMachine() *MachineInfo {
 	return nil
 }
 
+type TokenResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Token string `protobuf:"bytes,1,opt,name=token,proto3" json:"token,omitempty"`
+}
+
+func (x *TokenResponse) Reset() {
+	*x = TokenResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *TokenResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TokenResponse) ProtoMessage() {}
+
+func (x *TokenResponse) ProtoReflect() protoreflect.Message {
+	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 {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TokenResponse.ProtoReflect.Descriptor instead.
+func (*TokenResponse) Descriptor() ([]byte, []int) {
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *TokenResponse) GetToken() string {
+	if x != nil {
+		return x.Token
+	}
+	return ""
+}
+
 var File_internal_machine_api_pb_machine_proto protoreflect.FileDescriptor
 
 var file_internal_machine_api_pb_machine_proto_rawDesc = []byte{
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+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -176,22 +232,26 @@ 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, 2)
+var file_internal_machine_api_pb_machine_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
 var file_internal_machine_api_pb_machine_proto_goTypes = []any{
 	(*InitClusterRequest)(nil),  // 0: api.InitClusterRequest
 	(*InitClusterResponse)(nil), // 1: api.InitClusterResponse
-	(*IPPrefix)(nil),            // 2: api.IPPrefix
+	(*TokenResponse)(nil),       // 2: api.TokenResponse
-	(*User)(nil),                // 3: api.User
+	(*IPPrefix)(nil),            // 3: api.IPPrefix
-	(*MachineInfo)(nil),         // 4: api.MachineInfo
+	(*User)(nil),                // 4: api.User
+	(*MachineInfo)(nil),         // 5: api.MachineInfo
+	(*emptypb.Empty)(nil),       // 6: google.protobuf.Empty
 }
 var file_internal_machine_api_pb_machine_proto_depIdxs = []int32{
-	2, // 0: api.InitClusterRequest.network:type_name -> api.IPPrefix
+	3, // 0: api.InitClusterRequest.network:type_name -> api.IPPrefix
-	3, // 1: api.InitClusterRequest.user:type_name -> api.User
+	4, // 1: api.InitClusterRequest.user:type_name -> api.User
-	4, // 2: api.InitClusterResponse.machine:type_name -> api.MachineInfo
+	5, // 2: api.InitClusterResponse.machine:type_name -> api.MachineInfo
 	0, // 3: api.Machine.InitCluster:input_type -> api.InitClusterRequest
-	1, // 4: api.Machine.InitCluster:output_type -> api.InitClusterResponse
+	6, // 4: api.Machine.Token:input_type -> google.protobuf.Empty
-	4, // [4:5] is the sub-list for method output_type
+	1, // 5: api.Machine.InitCluster:output_type -> api.InitClusterResponse
-	3, // [3:4] is the sub-list for method input_type
+	2, // 6: api.Machine.Token:output_type -> api.TokenResponse
+	5, // [5:7] is the sub-list for method output_type
+	3, // [3:5] is the sub-list for method input_type
 	3, // [3:3] is the sub-list for extension type_name
 	3, // [3:3] is the sub-list for extension extendee
 	0, // [0:3] is the sub-list for field type_name
@@ -229,6 +289,18 @@ func file_internal_machine_api_pb_machine_proto_init() {
 				return nil
 			}
 		}
+		file_internal_machine_api_pb_machine_proto_msgTypes[2].Exporter = func(v any, i int) any {
+			switch v := v.(*TokenResponse); 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{
@@ -236,7 +308,7 @@ 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:   2,
+			NumMessages:   3,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

internal/machine/api/pb/machine.proto

@@ -4,11 +4,13 @@ package api;
 
 option go_package = "github.com/psviderski/uncloud/internal/machine/api/pb";
 
+import "google/protobuf/empty.proto";
 import "internal/machine/api/pb/common.proto";
 import "internal/machine/api/pb/cluster.proto";
 
 service Machine {
   rpc InitCluster(InitClusterRequest) returns (InitClusterResponse);
+  rpc Token(google.protobuf.Empty) returns (TokenResponse);
 }
 
 message InitClusterRequest {
@@ -20,3 +22,7 @@ message InitClusterRequest {
 message InitClusterResponse {
   MachineInfo machine = 1;
 }
+
+message TokenResponse {
+  string token = 1;
+}

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

@@ -11,6 +11,7 @@ import (
 	grpc "google.golang.org/grpc"
 	codes "google.golang.org/grpc/codes"
 	status "google.golang.org/grpc/status"
+	emptypb "google.golang.org/protobuf/types/known/emptypb"
 )
 
 // This is a compile-time assertion to ensure that this generated file
@@ -20,6 +21,7 @@ const _ = grpc.SupportPackageIsVersion9
 
 const (
 	Machine_InitCluster_FullMethodName = "/api.Machine/InitCluster"
+	Machine_Token_FullMethodName       = "/api.Machine/Token"
 )
 
 // MachineClient is the client API for Machine service.
@@ -27,6 +29,7 @@ const (
 // 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 {
 	InitCluster(ctx context.Context, in *InitClusterRequest, opts ...grpc.CallOption) (*InitClusterResponse, error)
+	Token(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*TokenResponse, error)
 }
 
 type machineClient struct {
@@ -47,11 +50,22 @@ func (c *machineClient) InitCluster(ctx context.Context, in *InitClusterRequest,
 	return out, nil
 }
 
+func (c *machineClient) Token(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*TokenResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(TokenResponse)
+	err := c.cc.Invoke(ctx, Machine_Token_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // MachineServer is the server API for Machine service.
 // All implementations must embed UnimplementedMachineServer
 // for forward compatibility.
 type MachineServer interface {
 	InitCluster(context.Context, *InitClusterRequest) (*InitClusterResponse, error)
+	Token(context.Context, *emptypb.Empty) (*TokenResponse, error)
 	mustEmbedUnimplementedMachineServer()
 }
 
@@ -65,6 +79,9 @@ type UnimplementedMachineServer struct{}
 func (UnimplementedMachineServer) InitCluster(context.Context, *InitClusterRequest) (*InitClusterResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method InitCluster not implemented")
 }
+func (UnimplementedMachineServer) Token(context.Context, *emptypb.Empty) (*TokenResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Token not implemented")
+}
 func (UnimplementedMachineServer) mustEmbedUnimplementedMachineServer() {}
 func (UnimplementedMachineServer) testEmbeddedByValue()                 {}
 
@@ -104,6 +121,24 @@ func _Machine_InitCluster_Handler(srv interface{}, ctx context.Context, dec func
 	return interceptor(ctx, in, info, handler)
 }
 
+func _Machine_Token_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).Token(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Machine_Token_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(MachineServer).Token(ctx, req.(*emptypb.Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // Machine_ServiceDesc is the grpc.ServiceDesc for Machine service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -115,6 +150,10 @@ var Machine_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "InitCluster",
 			Handler:    _Machine_InitCluster_Handler,
 		},
+		{
+			MethodName: "Token",
+			Handler:    _Machine_Token_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "internal/machine/api/pb/machine.proto",

internal/machine/machine.go

@@ -9,6 +9,7 @@ import (
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
+	"google.golang.org/protobuf/types/known/emptypb"
 	"log/slog"
 	"net"
 	"net/netip"
@@ -362,3 +363,32 @@ func (m *Machine) InitCluster(ctx context.Context, req *pb.InitClusterRequest) (
 	}
 	return resp, nil
 }
+
+// Token returns the local machine's token that can be used for adding the machine to a cluster.
+func (m *Machine) Token(_ context.Context, _ *emptypb.Empty) (*pb.TokenResponse, error) {
+	if len(m.state.Network.PublicKey) == 0 {
+		return nil, status.Error(codes.FailedPrecondition, "public key is not set in machine state")
+	}
+
+	ips, err := network.ListRoutableIPs()
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "list routable IPs: %v", err)
+	}
+	publicIP, err := network.GetPublicIP()
+	// Ignore the error if failed to get the public IP using API services.
+	if err == nil {
+		ips = append(ips, publicIP)
+	}
+	endpoints := make([]netip.AddrPort, len(ips))
+	for i, ip := range ips {
+		endpoints[i] = netip.AddrPortFrom(ip, network.WireGuardPort)
+	}
+
+	token := NewToken(m.state.Network.PublicKey, endpoints)
+	tokenStr, err := token.String()
+	if err != nil {
+		return nil, status.Error(codes.Internal, err.Error())
+	}
+
+	return &pb.TokenResponse{Token: tokenStr}, nil
+}