feat: Add uc wg show command to inspect a machine's uncloud wireguard network (#161)

* feat: Add `uc wg show` command to inspect a machine's uncloud wireguard network (draft / work in progress)

* Compile proto files with `make proto-mise`

* Fix lint errors

* Output peers in tabwriter table

* Lookup machine name for wireguard peer public key

* Add --machine flag to `uc wg show` to proxy call to specific machine

* Small refactor to move wg show logic out into a separate function

cmd/uncloud/main.go

@@ -14,6 +14,7 @@ import (
 	"github.com/psviderski/uncloud/cmd/uncloud/machine"
 	"github.com/psviderski/uncloud/cmd/uncloud/service"
 	"github.com/psviderski/uncloud/cmd/uncloud/volume"
+	"github.com/psviderski/uncloud/cmd/uncloud/wg"
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/internal/cli/config"
 	"github.com/psviderski/uncloud/internal/fs"
@@ -134,6 +135,7 @@ func main() {
 		service.NewStartCommand("service"),
 		service.NewStopCommand("service"),
 		volume.NewRootCommand(),
+		wg.NewRootCommand(),
 	)
 	cobra.CheckErr(cmd.Execute())
 }

cmd/uncloud/wg/wg.go

@@ -0,0 +1,122 @@
+package wg
+
+import (
+	"context"
+	"encoding/base64"
+	"fmt"
+	"os"
+	"strings"
+	"text/tabwriter"
+	"time"
+
+	"github.com/docker/go-units"
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/machine/api/pb"
+	"github.com/spf13/cobra"
+)
+
+func NewRootCommand() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "wg",
+		Short: "Inspect WireGuard network",
+	}
+	cmd.AddCommand(newShowCommand())
+	return cmd
+}
+
+type showOptions struct {
+	machine string
+}
+
+func newShowCommand() *cobra.Command {
+	opts := showOptions{}
+	cmd := &cobra.Command{
+		Use:   "show",
+		Short: "Show WireGuard configuration for the current machine",
+		Long:  "Shows the WireGuard configuration for the machine currently connected to (or specified by the global --connect flag).",
+		Args:  cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return runShow(cmd.Context(), uncli, opts)
+		},
+	}
+	cmd.Flags().StringVarP(&opts.machine, "machine", "m", "", "Name or ID of the machine to show configuration for")
+	return cmd
+}
+
+func runShow(ctx context.Context, uncli *cli.CLI, opts showOptions) error {
+	client, err := uncli.ConnectCluster(ctx)
+	if err != nil {
+		return fmt.Errorf("connection failed: %w", err)
+	}
+	defer client.Close()
+
+	if opts.machine != "" {
+		// Proxy requests to the specified machine.
+		ctx, _, err = client.ProxyMachinesContext(ctx, []string{opts.machine})
+		if err != nil {
+			return err
+		}
+	}
+
+	// Explicitly using the interface method to avoid ambiguity if any
+	var _ pb.MachineClient = client.MachineClient
+	resp, err := client.MachineClient.GetWireGuardDevice(ctx, nil)
+	if err != nil {
+		return err
+	}
+
+	machines, err := client.ListMachines(ctx, nil)
+	if err != nil {
+		return fmt.Errorf("list machines: %w", err)
+	}
+	machinesNamesByPublicKey := make(map[string]string)
+	for _, m := range machines {
+		publicKey := base64.StdEncoding.EncodeToString(m.Machine.Network.PublicKey)
+		machinesNamesByPublicKey[publicKey] = m.Machine.Name
+	}
+
+	// Fetch the machine's name for more descriptive output
+	inspectResp, err := client.Inspect(ctx, nil)
+	if err == nil {
+		fmt.Printf("Machine Name:         %s\n", inspectResp.Name)
+	}
+
+	fmt.Printf("WireGuard interface:  %s\n", resp.Name)
+	fmt.Printf("WireGuard public key: %s\n", resp.PublicKey)
+	fmt.Printf("WireGuard port:       %d\n", resp.ListenPort)
+	fmt.Println()
+
+	tw := tabwriter.NewWriter(os.Stdout, 0, 0, 3, ' ', 0)
+	if _, err = fmt.Fprintln(tw, "MACHINE\tPUBLIC KEY\tENDPOINT\tHANDSHAKE\tRECEIVED\tSENT\tALLOWED IPS"); err != nil {
+		return fmt.Errorf("write header: %w", err)
+	}
+
+	for _, peer := range resp.Peers {
+		machineName, ok := machinesNamesByPublicKey[peer.PublicKey]
+		if !ok {
+			machineName = "(unknown)"
+		}
+
+		lastHandshake := ""
+		if peer.LastHandshakeTime != nil {
+			lastHandshake = time.Since(peer.LastHandshakeTime.AsTime()).Round(time.Second).String() + " ago"
+		}
+
+		_, err = fmt.Fprintf(
+			tw,
+			"%s\t%s\t%s\t%s\t%s\t%s\t%s\n",
+			machineName,
+			peer.PublicKey,
+			peer.Endpoint,
+			lastHandshake,
+			units.HumanSize(float64(peer.ReceiveBytes)),
+			units.HumanSize(float64(peer.TransmitBytes)),
+			strings.Join(peer.AllowedIps, ", "),
+		)
+		if err != nil {
+			return fmt.Errorf("write row: %w", err)
+		}
+	}
+	return tw.Flush()
+}

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

@@ -10,6 +10,7 @@ import (
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	emptypb "google.golang.org/protobuf/types/known/emptypb"
+	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
 	reflect "reflect"
 	sync "sync"
 )
@@ -790,6 +791,164 @@ func (x *InspectServiceResponse) GetService() *Service {
 	return nil
 }
 
+type GetWireGuardDeviceResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name       string           `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	PublicKey  string           `protobuf:"bytes,2,opt,name=public_key,json=publicKey,proto3" json:"public_key,omitempty"`
+	ListenPort int32            `protobuf:"varint,3,opt,name=listen_port,json=listenPort,proto3" json:"listen_port,omitempty"`
+	Peers      []*WireGuardPeer `protobuf:"bytes,4,rep,name=peers,proto3" json:"peers,omitempty"`
+}
+
+func (x *GetWireGuardDeviceResponse) Reset() {
+	*x = GetWireGuardDeviceResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[13]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *GetWireGuardDeviceResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*GetWireGuardDeviceResponse) ProtoMessage() {}
+
+func (x *GetWireGuardDeviceResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[13]
+	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 GetWireGuardDeviceResponse.ProtoReflect.Descriptor instead.
+func (*GetWireGuardDeviceResponse) Descriptor() ([]byte, []int) {
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{13}
+}
+
+func (x *GetWireGuardDeviceResponse) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *GetWireGuardDeviceResponse) GetPublicKey() string {
+	if x != nil {
+		return x.PublicKey
+	}
+	return ""
+}
+
+func (x *GetWireGuardDeviceResponse) GetListenPort() int32 {
+	if x != nil {
+		return x.ListenPort
+	}
+	return 0
+}
+
+func (x *GetWireGuardDeviceResponse) GetPeers() []*WireGuardPeer {
+	if x != nil {
+		return x.Peers
+	}
+	return nil
+}
+
+type WireGuardPeer struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	PublicKey         string                 `protobuf:"bytes,1,opt,name=public_key,json=publicKey,proto3" json:"public_key,omitempty"`
+	Endpoint          string                 `protobuf:"bytes,2,opt,name=endpoint,proto3" json:"endpoint,omitempty"`
+	LastHandshakeTime *timestamppb.Timestamp `protobuf:"bytes,3,opt,name=last_handshake_time,json=lastHandshakeTime,proto3" json:"last_handshake_time,omitempty"`
+	ReceiveBytes      int64                  `protobuf:"varint,4,opt,name=receive_bytes,json=receiveBytes,proto3" json:"receive_bytes,omitempty"`
+	TransmitBytes     int64                  `protobuf:"varint,5,opt,name=transmit_bytes,json=transmitBytes,proto3" json:"transmit_bytes,omitempty"`
+	AllowedIps        []string               `protobuf:"bytes,6,rep,name=allowed_ips,json=allowedIps,proto3" json:"allowed_ips,omitempty"`
+}
+
+func (x *WireGuardPeer) Reset() {
+	*x = WireGuardPeer{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[14]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *WireGuardPeer) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*WireGuardPeer) ProtoMessage() {}
+
+func (x *WireGuardPeer) ProtoReflect() protoreflect.Message {
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[14]
+	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 WireGuardPeer.ProtoReflect.Descriptor instead.
+func (*WireGuardPeer) Descriptor() ([]byte, []int) {
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{14}
+}
+
+func (x *WireGuardPeer) GetPublicKey() string {
+	if x != nil {
+		return x.PublicKey
+	}
+	return ""
+}
+
+func (x *WireGuardPeer) GetEndpoint() string {
+	if x != nil {
+		return x.Endpoint
+	}
+	return ""
+}
+
+func (x *WireGuardPeer) GetLastHandshakeTime() *timestamppb.Timestamp {
+	if x != nil {
+		return x.LastHandshakeTime
+	}
+	return nil
+}
+
+func (x *WireGuardPeer) GetReceiveBytes() int64 {
+	if x != nil {
+		return x.ReceiveBytes
+	}
+	return 0
+}
+
+func (x *WireGuardPeer) GetTransmitBytes() int64 {
+	if x != nil {
+		return x.TransmitBytes
+	}
+	return 0
+}
+
+func (x *WireGuardPeer) GetAllowedIps() []string {
+	if x != nil {
+		return x.AllowedIps
+	}
+	return nil
+}
+
 type Service_Container struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -803,7 +962,7 @@ type Service_Container struct {
 func (x *Service_Container) Reset() {
 	*x = Service_Container{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[13]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[15]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -816,7 +975,7 @@ 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[13]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[15]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -853,135 +1012,168 @@ var file_internal_machine_api_pb_machine_proto_rawDesc = []byte{
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-	0x73, 0x70, 0x65, 0x63, 0x74, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x52, 0x65, 0x73, 0x70,
-	0x6f, 0x6e, 0x73, 0x65, 0x42, 0x37, 0x5a, 0x35, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63,
-	0x6f, 0x6d, 0x2f, 0x70, 0x73, 0x76, 0x69, 0x64, 0x65, 0x72, 0x73, 0x6b, 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,
+	0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x4d, 0x0a, 0x12, 0x47, 0x65, 0x74, 0x57,
+	0x69, 0x72, 0x65, 0x47, 0x75, 0x61, 0x72, 0x64, 0x44, 0x65, 0x76, 0x69, 0x63, 0x65, 0x12, 0x16,
+	0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66,
+	0x2e, 0x45, 0x6d, 0x70, 0x74, 0x79, 0x1a, 0x1f, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x47, 0x65, 0x74,
+	0x57, 0x69, 0x72, 0x65, 0x47, 0x75, 0x61, 0x72, 0x64, 0x44, 0x65, 0x76, 0x69, 0x63, 0x65, 0x52,
+	0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x37, 0x5a, 0x35, 0x67, 0x69, 0x74, 0x68, 0x75,
+	0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x70, 0x73, 0x76, 0x69, 0x64, 0x65, 0x72, 0x73, 0x6b, 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 (
@@ -996,7 +1188,7 @@ 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, 14)
+var file_internal_machine_api_pb_machine_proto_msgTypes = make([]protoimpl.MessageInfo, 16)
 var file_internal_machine_api_pb_machine_proto_goTypes = []any{
 	(*MachineInfo)(nil),                // 0: api.MachineInfo
 	(*NetworkConfig)(nil),              // 1: api.NetworkConfig
@@ -1011,50 +1203,57 @@ var file_internal_machine_api_pb_machine_proto_goTypes = []any{
 	(*Service)(nil),                    // 10: api.Service
 	(*InspectServiceRequest)(nil),      // 11: api.InspectServiceRequest
 	(*InspectServiceResponse)(nil),     // 12: api.InspectServiceResponse
-	(*Service_Container)(nil),          // 13: api.Service.Container
-	(*IP)(nil),                         // 14: api.IP
-	(*IPPrefix)(nil),                   // 15: api.IPPrefix
-	(*IPPort)(nil),                     // 16: api.IPPort
-	(*Metadata)(nil),                   // 17: api.Metadata
-	(*emptypb.Empty)(nil),              // 18: google.protobuf.Empty
+	(*GetWireGuardDeviceResponse)(nil), // 13: api.GetWireGuardDeviceResponse
+	(*WireGuardPeer)(nil),              // 14: api.WireGuardPeer
+	(*Service_Container)(nil),          // 15: api.Service.Container
+	(*IP)(nil),                         // 16: api.IP
+	(*IPPrefix)(nil),                   // 17: api.IPPrefix
+	(*IPPort)(nil),                     // 18: api.IPPort
+	(*Metadata)(nil),                   // 19: api.Metadata
+	(*timestamppb.Timestamp)(nil),      // 20: google.protobuf.Timestamp
+	(*emptypb.Empty)(nil),              // 21: google.protobuf.Empty
 }
 var file_internal_machine_api_pb_machine_proto_depIdxs = []int32{
 	1,  // 0: api.MachineInfo.network:type_name -> api.NetworkConfig
-	14, // 1: api.MachineInfo.public_ip:type_name -> api.IP
-	15, // 2: api.NetworkConfig.subnet:type_name -> api.IPPrefix
-	14, // 3: api.NetworkConfig.management_ip:type_name -> api.IP
-	16, // 4: api.NetworkConfig.endpoints:type_name -> api.IPPort
-	15, // 5: api.InitClusterRequest.network:type_name -> api.IPPrefix
-	14, // 6: api.InitClusterRequest.public_ip:type_name -> api.IP
+	16, // 1: api.MachineInfo.public_ip:type_name -> api.IP
+	17, // 2: api.NetworkConfig.subnet:type_name -> api.IPPrefix
+	16, // 3: api.NetworkConfig.management_ip:type_name -> api.IP
+	18, // 4: api.NetworkConfig.endpoints:type_name -> api.IPPort
+	17, // 5: api.InitClusterRequest.network:type_name -> api.IPPrefix
+	16, // 6: api.InitClusterRequest.public_ip:type_name -> api.IP
 	0,  // 7: api.InitClusterResponse.machine:type_name -> api.MachineInfo
 	0,  // 8: api.JoinClusterRequest.machine:type_name -> api.MachineInfo
 	0,  // 9: api.JoinClusterRequest.other_machines:type_name -> api.MachineInfo
 	7,  // 10: api.InspectMachineResponse.machines:type_name -> api.MachineDetails
-	17, // 11: api.MachineDetails.metadata:type_name -> api.Metadata
+	19, // 11: api.MachineDetails.metadata:type_name -> api.Metadata
 	0,  // 12: api.MachineDetails.machine:type_name -> api.MachineInfo
-	13, // 13: api.Service.containers:type_name -> api.Service.Container
+	15, // 13: api.Service.containers:type_name -> api.Service.Container
 	10, // 14: api.InspectServiceResponse.service:type_name -> api.Service
-	18, // 15: api.Machine.CheckPrerequisites:input_type -> google.protobuf.Empty
-	3,  // 16: api.Machine.InitCluster:input_type -> api.InitClusterRequest
-	5,  // 17: api.Machine.JoinCluster:input_type -> api.JoinClusterRequest
-	18, // 18: api.Machine.Token:input_type -> google.protobuf.Empty
-	18, // 19: api.Machine.Inspect:input_type -> google.protobuf.Empty
-	18, // 20: api.Machine.InspectMachine:input_type -> google.protobuf.Empty
-	9,  // 21: api.Machine.Reset:input_type -> api.ResetRequest
-	11, // 22: api.Machine.InspectService:input_type -> api.InspectServiceRequest
-	2,  // 23: api.Machine.CheckPrerequisites:output_type -> api.CheckPrerequisitesResponse
-	4,  // 24: api.Machine.InitCluster:output_type -> api.InitClusterResponse
-	18, // 25: api.Machine.JoinCluster:output_type -> google.protobuf.Empty
-	8,  // 26: api.Machine.Token:output_type -> api.TokenResponse
-	0,  // 27: api.Machine.Inspect:output_type -> api.MachineInfo
-	6,  // 28: api.Machine.InspectMachine:output_type -> api.InspectMachineResponse
-	18, // 29: api.Machine.Reset:output_type -> google.protobuf.Empty
-	12, // 30: api.Machine.InspectService:output_type -> api.InspectServiceResponse
-	23, // [23:31] is the sub-list for method output_type
-	15, // [15:23] is the sub-list for method input_type
-	15, // [15:15] is the sub-list for extension type_name
-	15, // [15:15] is the sub-list for extension extendee
-	0,  // [0:15] is the sub-list for field type_name
+	14, // 15: api.GetWireGuardDeviceResponse.peers:type_name -> api.WireGuardPeer
+	20, // 16: api.WireGuardPeer.last_handshake_time:type_name -> google.protobuf.Timestamp
+	21, // 17: api.Machine.CheckPrerequisites:input_type -> google.protobuf.Empty
+	3,  // 18: api.Machine.InitCluster:input_type -> api.InitClusterRequest
+	5,  // 19: api.Machine.JoinCluster:input_type -> api.JoinClusterRequest
+	21, // 20: api.Machine.Token:input_type -> google.protobuf.Empty
+	21, // 21: api.Machine.Inspect:input_type -> google.protobuf.Empty
+	21, // 22: api.Machine.InspectMachine:input_type -> google.protobuf.Empty
+	9,  // 23: api.Machine.Reset:input_type -> api.ResetRequest
+	11, // 24: api.Machine.InspectService:input_type -> api.InspectServiceRequest
+	21, // 25: api.Machine.GetWireGuardDevice:input_type -> google.protobuf.Empty
+	2,  // 26: api.Machine.CheckPrerequisites:output_type -> api.CheckPrerequisitesResponse
+	4,  // 27: api.Machine.InitCluster:output_type -> api.InitClusterResponse
+	21, // 28: api.Machine.JoinCluster:output_type -> google.protobuf.Empty
+	8,  // 29: api.Machine.Token:output_type -> api.TokenResponse
+	0,  // 30: api.Machine.Inspect:output_type -> api.MachineInfo
+	6,  // 31: api.Machine.InspectMachine:output_type -> api.InspectMachineResponse
+	21, // 32: api.Machine.Reset:output_type -> google.protobuf.Empty
+	12, // 33: api.Machine.InspectService:output_type -> api.InspectServiceResponse
+	13, // 34: api.Machine.GetWireGuardDevice:output_type -> api.GetWireGuardDeviceResponse
+	26, // [26:35] is the sub-list for method output_type
+	17, // [17:26] is the sub-list for method input_type
+	17, // [17:17] is the sub-list for extension type_name
+	17, // [17:17] is the sub-list for extension extendee
+	0,  // [0:17] is the sub-list for field type_name
 }
 
 func init() { file_internal_machine_api_pb_machine_proto_init() }
@@ -1221,6 +1420,30 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[13].Exporter = func(v any, i int) any {
+			switch v := v.(*GetWireGuardDeviceResponse); 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[14].Exporter = func(v any, i int) any {
+			switch v := v.(*WireGuardPeer); 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[15].Exporter = func(v any, i int) any {
 			switch v := v.(*Service_Container); i {
 			case 0:
 				return &v.state
@@ -1243,7 +1466,7 @@ 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:   14,
+			NumMessages:   16,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

internal/machine/api/pb/machine.proto

@@ -5,6 +5,7 @@ package api;
 option go_package = "github.com/psviderski/uncloud/internal/machine/api/pb";
 
 import "google/protobuf/empty.proto";
+import "google/protobuf/timestamp.proto";
 import "internal/machine/api/pb/common.proto";
 
 service Machine {
@@ -21,6 +22,8 @@ service Machine {
   rpc Reset(ResetRequest) returns (google.protobuf.Empty);
 
   rpc InspectService(InspectServiceRequest) returns (InspectServiceResponse);
+
+  rpc GetWireGuardDevice(google.protobuf.Empty) returns (GetWireGuardDeviceResponse);
 }
 
 message MachineInfo {
@@ -105,3 +108,19 @@ message InspectServiceRequest {
 message InspectServiceResponse {
   Service service = 1;
 }
+
+message GetWireGuardDeviceResponse {
+  string name = 1;
+  string public_key = 2;
+  int32 listen_port = 3;
+  repeated WireGuardPeer peers = 4;
+}
+
+message WireGuardPeer {
+  string public_key = 1;
+  string endpoint = 2;
+  google.protobuf.Timestamp last_handshake_time = 3;
+  int64 receive_bytes = 4;
+  int64 transmit_bytes = 5;
+  repeated string allowed_ips = 6;
+}

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

@@ -28,6 +28,7 @@ const (
 	Machine_InspectMachine_FullMethodName     = "/api.Machine/InspectMachine"
 	Machine_Reset_FullMethodName              = "/api.Machine/Reset"
 	Machine_InspectService_FullMethodName     = "/api.Machine/InspectService"
+	Machine_GetWireGuardDevice_FullMethodName = "/api.Machine/GetWireGuardDevice"
 )
 
 // MachineClient is the client API for Machine service.
@@ -46,6 +47,7 @@ type MachineClient interface {
 	// Reset restores the machine to a clean state, removing all cluster-related configuration and data.
 	Reset(ctx context.Context, in *ResetRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
 	InspectService(ctx context.Context, in *InspectServiceRequest, opts ...grpc.CallOption) (*InspectServiceResponse, error)
+	GetWireGuardDevice(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*GetWireGuardDeviceResponse, error)
 }
 
 type machineClient struct {
@@ -136,6 +138,16 @@ func (c *machineClient) InspectService(ctx context.Context, in *InspectServiceRe
 	return out, nil
 }
 
+func (c *machineClient) GetWireGuardDevice(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*GetWireGuardDeviceResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(GetWireGuardDeviceResponse)
+	err := c.cc.Invoke(ctx, Machine_GetWireGuardDevice_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.
@@ -152,6 +164,7 @@ type MachineServer interface {
 	// Reset restores the machine to a clean state, removing all cluster-related configuration and data.
 	Reset(context.Context, *ResetRequest) (*emptypb.Empty, error)
 	InspectService(context.Context, *InspectServiceRequest) (*InspectServiceResponse, error)
+	GetWireGuardDevice(context.Context, *emptypb.Empty) (*GetWireGuardDeviceResponse, error)
 	mustEmbedUnimplementedMachineServer()
 }
 
@@ -186,6 +199,9 @@ func (UnimplementedMachineServer) Reset(context.Context, *ResetRequest) (*emptyp
 func (UnimplementedMachineServer) InspectService(context.Context, *InspectServiceRequest) (*InspectServiceResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method InspectService not implemented")
 }
+func (UnimplementedMachineServer) GetWireGuardDevice(context.Context, *emptypb.Empty) (*GetWireGuardDeviceResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetWireGuardDevice not implemented")
+}
 func (UnimplementedMachineServer) mustEmbedUnimplementedMachineServer() {}
 func (UnimplementedMachineServer) testEmbeddedByValue()                 {}
 
@@ -351,6 +367,24 @@ func _Machine_InspectService_Handler(srv interface{}, ctx context.Context, dec f
 	return interceptor(ctx, in, info, handler)
 }
 
+func _Machine_GetWireGuardDevice_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).GetWireGuardDevice(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Machine_GetWireGuardDevice_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(MachineServer).GetWireGuardDevice(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)
@@ -390,6 +424,10 @@ var Machine_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "InspectService",
 			Handler:    _Machine_InspectService_Handler,
 		},
+		{
+			MethodName: "GetWireGuardDevice",
+			Handler:    _Machine_GetWireGuardDevice_Handler,
+		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "internal/machine/api/pb/machine.proto",

internal/machine/machine.go

@@ -33,10 +33,12 @@ import (
 	"github.com/psviderski/unregistry"
 	"github.com/siderolabs/grpc-proxy/proxy"
 	"golang.org/x/sync/errgroup"
+	"golang.zx2c4.com/wireguard/wgctrl"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/types/known/emptypb"
+	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
 const (
@@ -48,6 +50,55 @@ const (
 	DefaultCaddyAdminSockPath = "/run/uncloud/caddy/admin.sock"
 )
 
+func (m *Machine) GetWireGuardDevice(ctx context.Context, req *emptypb.Empty) (*pb.GetWireGuardDeviceResponse, error) {
+	deviceName := network.WireGuardInterfaceName
+
+	wg, err := wgctrl.New()
+	if err != nil {
+		return nil, fmt.Errorf("failed to create wireguard client: %w", err)
+	}
+	defer wg.Close()
+
+	dev, err := wg.Device(deviceName)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get wireguard device %q: %w", deviceName, err)
+	}
+
+	peers := make([]*pb.WireGuardPeer, len(dev.Peers))
+	for i, p := range dev.Peers {
+		var lastHandshake *timestamppb.Timestamp
+		if !p.LastHandshakeTime.IsZero() {
+			lastHandshake = timestamppb.New(p.LastHandshakeTime)
+		}
+
+		allowedIPs := make([]string, len(p.AllowedIPs))
+		for j, ip := range p.AllowedIPs {
+			allowedIPs[j] = ip.String()
+		}
+
+		var endpoint string
+		if p.Endpoint != nil {
+			endpoint = p.Endpoint.String()
+		}
+
+		peers[i] = &pb.WireGuardPeer{
+			PublicKey:         p.PublicKey.String(),
+			Endpoint:          endpoint,
+			LastHandshakeTime: lastHandshake,
+			ReceiveBytes:      p.ReceiveBytes,
+			TransmitBytes:     p.TransmitBytes,
+			AllowedIps:        allowedIPs,
+		}
+	}
+
+	return &pb.GetWireGuardDeviceResponse{
+		Name:       dev.Name,
+		PublicKey:  dev.PublicKey.String(),
+		ListenPort: int32(dev.ListenPort),
+		Peers:      peers,
+	}, nil
+}
+
 type Config struct {
 	// DataDir is the directory where the machine stores its persistent state. Default is /var/lib/uncloud.
 	DataDir         string