grpc infrastructure (#463)

agent/grpc.go

@@ -0,0 +1,14 @@
+package agent
+
+import (
+	"context"
+	"github.com/openziti/zrok/agent/grpc"
+	"github.com/prometheus/common/version"
+)
+
+type grpcServer struct {
+}
+
+func (s *grpcServer) Version(ctx context.Context, req *grpc.VersionRequest) (*grpc.VersionReply, error) {
+	return &grpc.VersionReply{V: &version.Version}, nil
+}

agent/grpc/agent.pb.go

@@ -0,0 +1,199 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.34.2
+// 	protoc        v5.27.3
+// source: agent.proto
+
+package grpc
+
+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 VersionRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *VersionRequest) Reset() {
+	*x = VersionRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_agent_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VersionRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VersionRequest) ProtoMessage() {}
+
+func (x *VersionRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_agent_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 VersionRequest.ProtoReflect.Descriptor instead.
+func (*VersionRequest) Descriptor() ([]byte, []int) {
+	return file_agent_proto_rawDescGZIP(), []int{0}
+}
+
+type VersionReply struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	V *string `protobuf:"bytes,1,req,name=v" json:"v,omitempty"`
+}
+
+func (x *VersionReply) Reset() {
+	*x = VersionReply{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_agent_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VersionReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VersionReply) ProtoMessage() {}
+
+func (x *VersionReply) ProtoReflect() protoreflect.Message {
+	mi := &file_agent_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 VersionReply.ProtoReflect.Descriptor instead.
+func (*VersionReply) Descriptor() ([]byte, []int) {
+	return file_agent_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *VersionReply) GetV() string {
+	if x != nil && x.V != nil {
+		return *x.V
+	}
+	return ""
+}
+
+var File_agent_proto protoreflect.FileDescriptor
+
+var file_agent_proto_rawDesc = []byte{
+	0x0a, 0x0b, 0x61, 0x67, 0x65, 0x6e, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x10, 0x0a,
+	0x0e, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x22,
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+	0x0c, 0x0a, 0x01, 0x76, 0x18, 0x01, 0x20, 0x02, 0x28, 0x09, 0x52, 0x01, 0x76, 0x32, 0x34, 0x0a,
+	0x05, 0x41, 0x67, 0x65, 0x6e, 0x74, 0x12, 0x2b, 0x0a, 0x07, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f,
+	0x6e, 0x12, 0x0f, 0x2e, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x71, 0x75, 0x65,
+	0x73, 0x74, 0x1a, 0x0d, 0x2e, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x70, 0x6c,
+	0x79, 0x22, 0x00, 0x42, 0x25, 0x5a, 0x23, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f,
+	0x6d, 0x2f, 0x6f, 0x70, 0x65, 0x6e, 0x7a, 0x69, 0x74, 0x69, 0x2f, 0x7a, 0x72, 0x6f, 0x6b, 0x2f,
+	0x61, 0x67, 0x65, 0x6e, 0x74, 0x2f, 0x67, 0x72, 0x70, 0x63,
+}
+
+var (
+	file_agent_proto_rawDescOnce sync.Once
+	file_agent_proto_rawDescData = file_agent_proto_rawDesc
+)
+
+func file_agent_proto_rawDescGZIP() []byte {
+	file_agent_proto_rawDescOnce.Do(func() {
+		file_agent_proto_rawDescData = protoimpl.X.CompressGZIP(file_agent_proto_rawDescData)
+	})
+	return file_agent_proto_rawDescData
+}
+
+var file_agent_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_agent_proto_goTypes = []any{
+	(*VersionRequest)(nil), // 0: VersionRequest
+	(*VersionReply)(nil),   // 1: VersionReply
+}
+var file_agent_proto_depIdxs = []int32{
+	0, // 0: Agent.Version:input_type -> VersionRequest
+	1, // 1: Agent.Version:output_type -> VersionReply
+	1, // [1:2] is the sub-list for method output_type
+	0, // [0:1] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_agent_proto_init() }
+func file_agent_proto_init() {
+	if File_agent_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_agent_proto_msgTypes[0].Exporter = func(v any, i int) any {
+			switch v := v.(*VersionRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_agent_proto_msgTypes[1].Exporter = func(v any, i int) any {
+			switch v := v.(*VersionReply); 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_agent_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_agent_proto_goTypes,
+		DependencyIndexes: file_agent_proto_depIdxs,
+		MessageInfos:      file_agent_proto_msgTypes,
+	}.Build()
+	File_agent_proto = out.File
+	file_agent_proto_rawDesc = nil
+	file_agent_proto_goTypes = nil
+	file_agent_proto_depIdxs = nil
+}

agent/grpc/agent.proto

@@ -0,0 +1,12 @@
+option go_package = "github.com/openziti/zrok/agent/grpc";
+
+service Agent {
+	rpc Version(VersionRequest) returns (VersionReply) {}
+}
+
+message VersionRequest {
+}
+
+message VersionReply {
+	required string v = 1;
+}

agent/grpc/agent/grpc/agent.pb.go

@@ -0,0 +1,200 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.34.2
+// 	protoc        v5.27.3
+// source: agent/grpc/agent.proto
+
+package grpc
+
+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 VersionRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *VersionRequest) Reset() {
+	*x = VersionRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_agent_grpc_agent_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VersionRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VersionRequest) ProtoMessage() {}
+
+func (x *VersionRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_agent_grpc_agent_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 VersionRequest.ProtoReflect.Descriptor instead.
+func (*VersionRequest) Descriptor() ([]byte, []int) {
+	return file_agent_grpc_agent_proto_rawDescGZIP(), []int{0}
+}
+
+type VersionReply struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	V *string `protobuf:"bytes,1,req,name=v" json:"v,omitempty"`
+}
+
+func (x *VersionReply) Reset() {
+	*x = VersionReply{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_agent_grpc_agent_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VersionReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VersionReply) ProtoMessage() {}
+
+func (x *VersionReply) ProtoReflect() protoreflect.Message {
+	mi := &file_agent_grpc_agent_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 VersionReply.ProtoReflect.Descriptor instead.
+func (*VersionReply) Descriptor() ([]byte, []int) {
+	return file_agent_grpc_agent_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *VersionReply) GetV() string {
+	if x != nil && x.V != nil {
+		return *x.V
+	}
+	return ""
+}
+
+var File_agent_grpc_agent_proto protoreflect.FileDescriptor
+
+var file_agent_grpc_agent_proto_rawDesc = []byte{
+	0x0a, 0x16, 0x61, 0x67, 0x65, 0x6e, 0x74, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x2f, 0x61, 0x67, 0x65,
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+	0x72, 0x73, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x70, 0x6c, 0x79, 0x12, 0x0c, 0x0a, 0x01, 0x76, 0x18,
+	0x01, 0x20, 0x02, 0x28, 0x09, 0x52, 0x01, 0x76, 0x32, 0x34, 0x0a, 0x05, 0x41, 0x67, 0x65, 0x6e,
+	0x74, 0x12, 0x2b, 0x0a, 0x07, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x12, 0x0f, 0x2e, 0x56,
+	0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x0d, 0x2e,
+	0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x52, 0x65, 0x70, 0x6c, 0x79, 0x22, 0x00, 0x42, 0x25,
+	0x5a, 0x23, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x6f, 0x70, 0x65,
+	0x6e, 0x7a, 0x69, 0x74, 0x69, 0x2f, 0x7a, 0x72, 0x6f, 0x6b, 0x2f, 0x61, 0x67, 0x65, 0x6e, 0x74,
+	0x2f, 0x67, 0x72, 0x70, 0x63,
+}
+
+var (
+	file_agent_grpc_agent_proto_rawDescOnce sync.Once
+	file_agent_grpc_agent_proto_rawDescData = file_agent_grpc_agent_proto_rawDesc
+)
+
+func file_agent_grpc_agent_proto_rawDescGZIP() []byte {
+	file_agent_grpc_agent_proto_rawDescOnce.Do(func() {
+		file_agent_grpc_agent_proto_rawDescData = protoimpl.X.CompressGZIP(file_agent_grpc_agent_proto_rawDescData)
+	})
+	return file_agent_grpc_agent_proto_rawDescData
+}
+
+var file_agent_grpc_agent_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_agent_grpc_agent_proto_goTypes = []any{
+	(*VersionRequest)(nil), // 0: VersionRequest
+	(*VersionReply)(nil),   // 1: VersionReply
+}
+var file_agent_grpc_agent_proto_depIdxs = []int32{
+	0, // 0: Agent.Version:input_type -> VersionRequest
+	1, // 1: Agent.Version:output_type -> VersionReply
+	1, // [1:2] is the sub-list for method output_type
+	0, // [0:1] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_agent_grpc_agent_proto_init() }
+func file_agent_grpc_agent_proto_init() {
+	if File_agent_grpc_agent_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_agent_grpc_agent_proto_msgTypes[0].Exporter = func(v any, i int) any {
+			switch v := v.(*VersionRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_agent_grpc_agent_proto_msgTypes[1].Exporter = func(v any, i int) any {
+			switch v := v.(*VersionReply); 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_agent_grpc_agent_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_agent_grpc_agent_proto_goTypes,
+		DependencyIndexes: file_agent_grpc_agent_proto_depIdxs,
+		MessageInfos:      file_agent_grpc_agent_proto_msgTypes,
+	}.Build()
+	File_agent_grpc_agent_proto = out.File
+	file_agent_grpc_agent_proto_rawDesc = nil
+	file_agent_grpc_agent_proto_goTypes = nil
+	file_agent_grpc_agent_proto_depIdxs = nil
+}

agent/grpc/agent/grpc/agent_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: agent/grpc/agent.proto
+
+package grpc
+
+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 (
+	Agent_Version_FullMethodName = "/Agent/Version"
+)
+
+// AgentClient is the client API for Agent 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 AgentClient interface {
+	Version(ctx context.Context, in *VersionRequest, opts ...grpc.CallOption) (*VersionReply, error)
+}
+
+type agentClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewAgentClient(cc grpc.ClientConnInterface) AgentClient {
+	return &agentClient{cc}
+}
+
+func (c *agentClient) Version(ctx context.Context, in *VersionRequest, opts ...grpc.CallOption) (*VersionReply, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(VersionReply)
+	err := c.cc.Invoke(ctx, Agent_Version_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// AgentServer is the server API for Agent service.
+// All implementations must embed UnimplementedAgentServer
+// for forward compatibility.
+type AgentServer interface {
+	Version(context.Context, *VersionRequest) (*VersionReply, error)
+	mustEmbedUnimplementedAgentServer()
+}
+
+// UnimplementedAgentServer 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 UnimplementedAgentServer struct{}
+
+func (UnimplementedAgentServer) Version(context.Context, *VersionRequest) (*VersionReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Version not implemented")
+}
+func (UnimplementedAgentServer) mustEmbedUnimplementedAgentServer() {}
+func (UnimplementedAgentServer) testEmbeddedByValue()               {}
+
+// UnsafeAgentServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to AgentServer will
+// result in compilation errors.
+type UnsafeAgentServer interface {
+	mustEmbedUnimplementedAgentServer()
+}
+
+func RegisterAgentServer(s grpc.ServiceRegistrar, srv AgentServer) {
+	// If the following call pancis, it indicates UnimplementedAgentServer 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(&Agent_ServiceDesc, srv)
+}
+
+func _Agent_Version_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(VersionRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(AgentServer).Version(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Agent_Version_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(AgentServer).Version(ctx, req.(*VersionRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// Agent_ServiceDesc is the grpc.ServiceDesc for Agent service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Agent_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "Agent",
+	HandlerType: (*AgentServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Version",
+			Handler:    _Agent_Version_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "agent/grpc/agent.proto",
+}

agent/grpc/agent_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: agent.proto
+
+package grpc
+
+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 (
+	Agent_Version_FullMethodName = "/Agent/Version"
+)
+
+// AgentClient is the client API for Agent 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 AgentClient interface {
+	Version(ctx context.Context, in *VersionRequest, opts ...grpc.CallOption) (*VersionReply, error)
+}
+
+type agentClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewAgentClient(cc grpc.ClientConnInterface) AgentClient {
+	return &agentClient{cc}
+}
+
+func (c *agentClient) Version(ctx context.Context, in *VersionRequest, opts ...grpc.CallOption) (*VersionReply, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(VersionReply)
+	err := c.cc.Invoke(ctx, Agent_Version_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// AgentServer is the server API for Agent service.
+// All implementations must embed UnimplementedAgentServer
+// for forward compatibility.
+type AgentServer interface {
+	Version(context.Context, *VersionRequest) (*VersionReply, error)
+	mustEmbedUnimplementedAgentServer()
+}
+
+// UnimplementedAgentServer 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 UnimplementedAgentServer struct{}
+
+func (UnimplementedAgentServer) Version(context.Context, *VersionRequest) (*VersionReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Version not implemented")
+}
+func (UnimplementedAgentServer) mustEmbedUnimplementedAgentServer() {}
+func (UnimplementedAgentServer) testEmbeddedByValue()               {}
+
+// UnsafeAgentServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to AgentServer will
+// result in compilation errors.
+type UnsafeAgentServer interface {
+	mustEmbedUnimplementedAgentServer()
+}
+
+func RegisterAgentServer(s grpc.ServiceRegistrar, srv AgentServer) {
+	// If the following call pancis, it indicates UnimplementedAgentServer 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(&Agent_ServiceDesc, srv)
+}
+
+func _Agent_Version_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(VersionRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(AgentServer).Version(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Agent_Version_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(AgentServer).Version(ctx, req.(*VersionRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// Agent_ServiceDesc is the grpc.ServiceDesc for Agent service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Agent_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "Agent",
+	HandlerType: (*AgentServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Version",
+			Handler:    _Agent_Version_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "agent.proto",
+}

bin/generate_pb.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+protoc --go_out=agent/grpc \
+	--go_opt=paths=source_relative \
+	--go-grpc_out=agent/grpc \
+	--go-grpc_opt=paths=source_relative \
+	agent/grpc/agent.proto