From 8197d933f87e0760f45c396676f15d786dfe2782 Mon Sep 17 00:00:00 2001 From: Adphi Date: Wed, 22 Jan 2020 14:02:06 +0100 Subject: [PATCH] [wip] base options, command, service --- .gitignore | 1 + README.md | 0 example/example.go | 54 +++++++ example/example.pb.go | 319 +++++++++++++++++++++++++++++++++++++++ example/example.proto | 23 +++ go.mod | 14 ++ go.sum | 214 +++++++++++++++++++++++++++ service/command.go | 41 +++++ service/options.go | 337 ++++++++++++++++++++++++++++++++++++++++++ service/service.go | 148 +++++++++++++++++++ 10 files changed, 1151 insertions(+) create mode 100644 .gitignore create mode 100644 README.md create mode 100644 example/example.go create mode 100644 example/example.pb.go create mode 100644 example/example.proto create mode 100644 go.mod create mode 100644 go.sum create mode 100644 service/command.go create mode 100644 service/options.go create mode 100644 service/service.go diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..485dee6 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +.idea diff --git a/README.md b/README.md new file mode 100644 index 0000000..e69de29 diff --git a/example/example.go b/example/example.go new file mode 100644 index 0000000..6411e4a --- /dev/null +++ b/example/example.go @@ -0,0 +1,54 @@ +package main + +import ( + "context" + "fmt" + "time" + + service2 "gitlab.bertha.cloud/partitio/grpc-service/service" +) + +type GreeterHandler struct{} + +func hello(name string) string { + return fmt.Sprintf("Hello %s !", name) +} + +func (g *GreeterHandler) SayHello(ctx context.Context, req *HelloRequest) (*HelloReply, error) { + return &HelloReply{Message: hello(req.Name)}, nil +} + +func (g *GreeterHandler) SayHelloStream(req *HelloStreamRequest, s Greeter_SayHelloStreamServer) error { + for i := int64(0); i < req.Count; i++ { + if err := s.Send(&HelloReply{Message: hello(req.Name)}); err != nil { + return err + } + } + return nil +} + +func main() { + ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) + defer cancel() + var svc service2.Service + var err error + svc, err = service2.New( + service2.WithContext(ctx), + service2.WithName("Greeting"), + service2.WithAfterStart(func() error { + fmt.Println("Server listening on", svc.Options().Address()) + return nil + }), + service2.WithAfterStop(func() error { + fmt.Println("Stopping server") + return nil + }), + ) + if err != nil { + panic(err) + } + RegisterGreeterServer(svc.Server(), &GreeterHandler{}) + if err := svc.Start(); err != nil { + panic(err) + } +} diff --git a/example/example.pb.go b/example/example.pb.go new file mode 100644 index 0000000..c981b6e --- /dev/null +++ b/example/example.pb.go @@ -0,0 +1,319 @@ +// Code generated by protoc-gen-go. DO NOT EDIT. +// source: example.proto + +package main + +import ( + context "context" + fmt "fmt" + proto "github.com/golang/protobuf/proto" + grpc "google.golang.org/grpc" + codes "google.golang.org/grpc/codes" + status "google.golang.org/grpc/status" + math "math" +) + +// Reference imports to suppress errors if they are not otherwise used. +var _ = proto.Marshal +var _ = fmt.Errorf +var _ = math.Inf + +// This is a compile-time assertion to ensure that this generated file +// is compatible with the proto package it is being compiled against. +// A compilation error at this line likely means your copy of the +// proto package needs to be updated. +const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package + +type HelloRequest struct { + Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *HelloRequest) Reset() { *m = HelloRequest{} } +func (m *HelloRequest) String() string { return proto.CompactTextString(m) } +func (*HelloRequest) ProtoMessage() {} +func (*HelloRequest) Descriptor() ([]byte, []int) { + return fileDescriptor_15a1dc8d40dadaa6, []int{0} +} + +func (m *HelloRequest) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_HelloRequest.Unmarshal(m, b) +} +func (m *HelloRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_HelloRequest.Marshal(b, m, deterministic) +} +func (m *HelloRequest) XXX_Merge(src proto.Message) { + xxx_messageInfo_HelloRequest.Merge(m, src) +} +func (m *HelloRequest) XXX_Size() int { + return xxx_messageInfo_HelloRequest.Size(m) +} +func (m *HelloRequest) XXX_DiscardUnknown() { + xxx_messageInfo_HelloRequest.DiscardUnknown(m) +} + +var xxx_messageInfo_HelloRequest proto.InternalMessageInfo + +func (m *HelloRequest) GetName() string { + if m != nil { + return m.Name + } + return "" +} + +type HelloReply struct { + Message string `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *HelloReply) Reset() { *m = HelloReply{} } +func (m *HelloReply) String() string { return proto.CompactTextString(m) } +func (*HelloReply) ProtoMessage() {} +func (*HelloReply) Descriptor() ([]byte, []int) { + return fileDescriptor_15a1dc8d40dadaa6, []int{1} +} + +func (m *HelloReply) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_HelloReply.Unmarshal(m, b) +} +func (m *HelloReply) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_HelloReply.Marshal(b, m, deterministic) +} +func (m *HelloReply) XXX_Merge(src proto.Message) { + xxx_messageInfo_HelloReply.Merge(m, src) +} +func (m *HelloReply) XXX_Size() int { + return xxx_messageInfo_HelloReply.Size(m) +} +func (m *HelloReply) XXX_DiscardUnknown() { + xxx_messageInfo_HelloReply.DiscardUnknown(m) +} + +var xxx_messageInfo_HelloReply proto.InternalMessageInfo + +func (m *HelloReply) GetMessage() string { + if m != nil { + return m.Message + } + return "" +} + +type HelloStreamRequest struct { + Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"` + Count int64 `protobuf:"varint,2,opt,name=count,proto3" json:"count,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *HelloStreamRequest) Reset() { *m = HelloStreamRequest{} } +func (m *HelloStreamRequest) String() string { return proto.CompactTextString(m) } +func (*HelloStreamRequest) ProtoMessage() {} +func (*HelloStreamRequest) Descriptor() ([]byte, []int) { + return fileDescriptor_15a1dc8d40dadaa6, []int{2} +} + +func (m *HelloStreamRequest) XXX_Unmarshal(b []byte) error { + return xxx_messageInfo_HelloStreamRequest.Unmarshal(m, b) +} +func (m *HelloStreamRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + return xxx_messageInfo_HelloStreamRequest.Marshal(b, m, deterministic) +} +func (m *HelloStreamRequest) XXX_Merge(src proto.Message) { + xxx_messageInfo_HelloStreamRequest.Merge(m, src) +} +func (m *HelloStreamRequest) XXX_Size() int { + return xxx_messageInfo_HelloStreamRequest.Size(m) +} +func (m *HelloStreamRequest) XXX_DiscardUnknown() { + xxx_messageInfo_HelloStreamRequest.DiscardUnknown(m) +} + +var xxx_messageInfo_HelloStreamRequest proto.InternalMessageInfo + +func (m *HelloStreamRequest) GetName() string { + if m != nil { + return m.Name + } + return "" +} + +func (m *HelloStreamRequest) GetCount() int64 { + if m != nil { + return m.Count + } + return 0 +} + +func init() { + proto.RegisterType((*HelloRequest)(nil), "helloworld.HelloRequest") + proto.RegisterType((*HelloReply)(nil), "helloworld.HelloReply") + proto.RegisterType((*HelloStreamRequest)(nil), "helloworld.HelloStreamRequest") +} + +func init() { proto.RegisterFile("example.proto", fileDescriptor_15a1dc8d40dadaa6) } + +var fileDescriptor_15a1dc8d40dadaa6 = []byte{ + // 208 bytes of a gzipped FileDescriptorProto + 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0x4d, 0xad, 0x48, 0xcc, + 0x2d, 0xc8, 0x49, 0xd5, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0xca, 0x48, 0xcd, 0xc9, 0xc9, + 0x2f, 0xcf, 0x2f, 0xca, 0x49, 0x51, 0x52, 0xe2, 0xe2, 0xf1, 0x00, 0xf1, 0x82, 0x52, 0x0b, 0x4b, + 0x53, 0x8b, 0x4b, 0x84, 0x84, 0xb8, 0x58, 0xf2, 0x12, 0x73, 0x53, 0x25, 0x18, 0x15, 0x18, 0x35, + 0x38, 0x83, 0xc0, 0x6c, 0x25, 0x35, 0x2e, 0x2e, 0xa8, 0x9a, 0x82, 0x9c, 0x4a, 0x21, 0x09, 0x2e, + 0xf6, 0xdc, 0xd4, 0xe2, 0xe2, 0xc4, 0x74, 0x98, 0x22, 0x18, 0x57, 0xc9, 0x8e, 0x4b, 0x08, 0xac, + 0x2e, 0xb8, 0xa4, 0x28, 0x35, 0x31, 0x17, 0x8f, 0x89, 0x42, 0x22, 0x5c, 0xac, 0xc9, 0xf9, 0xa5, + 0x79, 0x25, 0x12, 0x4c, 0x0a, 0x8c, 0x1a, 0xcc, 0x41, 0x10, 0x8e, 0xd1, 0x74, 0x46, 0x2e, 0x76, + 0xf7, 0xa2, 0xd4, 0xd4, 0x92, 0xd4, 0x22, 0x21, 0x3b, 0x2e, 0x8e, 0xe0, 0xc4, 0x4a, 0xb0, 0x71, + 0x42, 0x12, 0x7a, 0x08, 0x07, 0xeb, 0x21, 0xbb, 0x56, 0x4a, 0x0c, 0x8b, 0x4c, 0x41, 0x4e, 0xa5, + 0x12, 0x83, 0x90, 0x0f, 0x17, 0x1f, 0x4c, 0x3f, 0xc4, 0x39, 0x42, 0x72, 0x18, 0x6a, 0x51, 0xdc, + 0x89, 0xdb, 0x2c, 0x03, 0x46, 0x27, 0xb6, 0x28, 0x96, 0xdc, 0xc4, 0xcc, 0xbc, 0x24, 0x36, 0x70, + 0x00, 0x1a, 0x03, 0x02, 0x00, 0x00, 0xff, 0xff, 0xd0, 0x30, 0x8a, 0x2d, 0x51, 0x01, 0x00, 0x00, +} + +// Reference imports to suppress errors if they are not otherwise used. +var _ context.Context +var _ grpc.ClientConn + +// This is a compile-time assertion to ensure that this generated file +// is compatible with the grpc package it is being compiled against. +const _ = grpc.SupportPackageIsVersion4 + +// GreeterClient is the client API for Greeter service. +// +// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream. +type GreeterClient interface { + SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error) + SayHelloStream(ctx context.Context, in *HelloStreamRequest, opts ...grpc.CallOption) (Greeter_SayHelloStreamClient, error) +} + +type greeterClient struct { + cc *grpc.ClientConn +} + +func NewGreeterClient(cc *grpc.ClientConn) GreeterClient { + return &greeterClient{cc} +} + +func (c *greeterClient) SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error) { + out := new(HelloReply) + err := c.cc.Invoke(ctx, "/helloworld.Greeter/SayHello", in, out, opts...) + if err != nil { + return nil, err + } + return out, nil +} + +func (c *greeterClient) SayHelloStream(ctx context.Context, in *HelloStreamRequest, opts ...grpc.CallOption) (Greeter_SayHelloStreamClient, error) { + stream, err := c.cc.NewStream(ctx, &_Greeter_serviceDesc.Streams[0], "/helloworld.Greeter/SayHelloStream", opts...) + if err != nil { + return nil, err + } + x := &greeterSayHelloStreamClient{stream} + if err := x.ClientStream.SendMsg(in); err != nil { + return nil, err + } + if err := x.ClientStream.CloseSend(); err != nil { + return nil, err + } + return x, nil +} + +type Greeter_SayHelloStreamClient interface { + Recv() (*HelloReply, error) + grpc.ClientStream +} + +type greeterSayHelloStreamClient struct { + grpc.ClientStream +} + +func (x *greeterSayHelloStreamClient) Recv() (*HelloReply, error) { + m := new(HelloReply) + if err := x.ClientStream.RecvMsg(m); err != nil { + return nil, err + } + return m, nil +} + +// GreeterServer is the server API for Greeter service. +type GreeterServer interface { + SayHello(context.Context, *HelloRequest) (*HelloReply, error) + SayHelloStream(*HelloStreamRequest, Greeter_SayHelloStreamServer) error +} + +// UnimplementedGreeterServer can be embedded to have forward compatible implementations. +type UnimplementedGreeterServer struct { +} + +func (*UnimplementedGreeterServer) SayHello(ctx context.Context, req *HelloRequest) (*HelloReply, error) { + return nil, status.Errorf(codes.Unimplemented, "method SayHello not implemented") +} +func (*UnimplementedGreeterServer) SayHelloStream(req *HelloStreamRequest, srv Greeter_SayHelloStreamServer) error { + return status.Errorf(codes.Unimplemented, "method SayHelloStream not implemented") +} + +func RegisterGreeterServer(s *grpc.Server, srv GreeterServer) { + s.RegisterService(&_Greeter_serviceDesc, srv) +} + +func _Greeter_SayHello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) { + in := new(HelloRequest) + if err := dec(in); err != nil { + return nil, err + } + if interceptor == nil { + return srv.(GreeterServer).SayHello(ctx, in) + } + info := &grpc.UnaryServerInfo{ + Server: srv, + FullMethod: "/helloworld.Greeter/SayHello", + } + handler := func(ctx context.Context, req interface{}) (interface{}, error) { + return srv.(GreeterServer).SayHello(ctx, req.(*HelloRequest)) + } + return interceptor(ctx, in, info, handler) +} + +func _Greeter_SayHelloStream_Handler(srv interface{}, stream grpc.ServerStream) error { + m := new(HelloStreamRequest) + if err := stream.RecvMsg(m); err != nil { + return err + } + return srv.(GreeterServer).SayHelloStream(m, &greeterSayHelloStreamServer{stream}) +} + +type Greeter_SayHelloStreamServer interface { + Send(*HelloReply) error + grpc.ServerStream +} + +type greeterSayHelloStreamServer struct { + grpc.ServerStream +} + +func (x *greeterSayHelloStreamServer) Send(m *HelloReply) error { + return x.ServerStream.SendMsg(m) +} + +var _Greeter_serviceDesc = grpc.ServiceDesc{ + ServiceName: "helloworld.Greeter", + HandlerType: (*GreeterServer)(nil), + Methods: []grpc.MethodDesc{ + { + MethodName: "SayHello", + Handler: _Greeter_SayHello_Handler, + }, + }, + Streams: []grpc.StreamDesc{ + { + StreamName: "SayHelloStream", + Handler: _Greeter_SayHelloStream_Handler, + ServerStreams: true, + }, + }, + Metadata: "example.proto", +} diff --git a/example/example.proto b/example/example.proto new file mode 100644 index 0000000..6af07c2 --- /dev/null +++ b/example/example.proto @@ -0,0 +1,23 @@ +syntax = "proto3"; + +package helloworld; + +option go_package = "main"; + +service Greeter { + rpc SayHello (HelloRequest) returns (HelloReply) {} + rpc SayHelloStream (HelloStreamRequest) returns (stream HelloReply) {} +} + +message HelloRequest { + string name = 1; +} + +message HelloReply { + string message = 1; +} + +message HelloStreamRequest { + string name = 1; + int64 count = 2; +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..fcd8d89 --- /dev/null +++ b/go.mod @@ -0,0 +1,14 @@ +module gitlab.bertha.cloud/partitio/grpc-service + +go 1.13 + +require ( + github.com/golang/protobuf v1.3.2 + github.com/grpc-ecosystem/go-grpc-middleware v1.1.0 + github.com/jinzhu/gorm v1.9.12 + github.com/nats-io/stan.go v0.6.0 // indirect + github.com/spf13/cobra v0.0.5 + github.com/spf13/pflag v1.0.3 + github.com/spf13/viper v1.6.2 + google.golang.org/grpc v1.26.0 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..295b524 --- /dev/null +++ b/go.sum @@ -0,0 +1,214 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU= +github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= +github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8= +github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q= +github.com/beorn7/perks v1.0.0/go.mod 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v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74= +gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I= +gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= diff --git a/service/command.go b/service/command.go new file mode 100644 index 0000000..e2e7965 --- /dev/null +++ b/service/command.go @@ -0,0 +1,41 @@ +package service + +import ( + "github.com/spf13/cobra" + "github.com/spf13/viper" +) + +var cmd = &cobra.Command{ + Short: "A gRPC micro service", +} + +const ( + caCert = "ca_cert" + serverAddress = "server_address" + serverCert = "server_cert" + serverKey = "server_key" +) + +func init() { + viper.AutomaticEnv() + // server_address + cmd.Flags().String(serverAddress, "0.0.0.0:0", "Bind address for the server. 127.0.0.1:9090 [$SERVER_ADDRESS]") + viper.BindPFlag(serverAddress, cmd.Flags().Lookup(serverAddress)) + // ca_cert + cmd.Flags().String(caCert, "", "Path to Root CA certificate [$CA_CERT]") + viper.BindPFlag(caCert, cmd.Flags().Lookup(caCert)) + // server_cert + cmd.Flags().String(serverCert, "", "Path to Server certificate [$SERVER_CERT]") + viper.BindPFlag(serverCert, cmd.Flags().Lookup(serverCert)) + // server_key + cmd.Flags().String(serverKey, "", "Path to Server key [$SERVER_KEY]") + viper.BindPFlag(serverKey, cmd.Flags().Lookup(serverKey)) +} + +func parseFlags(o *options) *options { + o.address = viper.GetString(serverAddress) + o.caCert = viper.GetString(caCert) + o.cert = viper.GetString(serverCert) + o.key = viper.GetString(serverKey) + return o +} diff --git a/service/options.go b/service/options.go new file mode 100644 index 0000000..50335ae --- /dev/null +++ b/service/options.go @@ -0,0 +1,337 @@ +package service + +import ( + "context" + "crypto/tls" + "crypto/x509" + "fmt" + "io/ioutil" + "reflect" + + "github.com/jinzhu/gorm" + "google.golang.org/grpc" +) + +/* +GLOBAL OPTIONS: + --client value Client for go-micro; rpc [$MICRO_CLIENT] + --client_request_timeout value Sets the client request timeout. e.g 500ms, 5s, 1m. Default: 5s [$MICRO_CLIENT_REQUEST_TIMEOUT] + --client_retries value Sets the client retries. Default: 1 (default: 1) [$MICRO_CLIENT_RETRIES] + --client_pool_size value Sets the client connection pool size. Default: 1 (default: 0) [$MICRO_CLIENT_POOL_SIZE] + --client_pool_ttl value Sets the client connection pool ttl. e.g 500ms, 5s, 1m. Default: 1m [$MICRO_CLIENT_POOL_TTL] + --register_ttl value Register TTL in seconds (default: 0) [$MICRO_REGISTER_TTL] + --register_interval value Register interval in seconds (default: 0) [$MICRO_REGISTER_INTERVAL] + --server value Server for go-micro; rpc [$MICRO_SERVER] + --server_name value Name of the server. go.micro.srv.example [$MICRO_SERVER_NAME] + --server_version value Version of the server. 1.1.0 [$MICRO_SERVER_VERSION] + --server_id value Id of the server. Auto-generated if not specified [$MICRO_SERVER_ID] + --server_address value Bind address for the server. 127.0.0.1:8080 [$MICRO_SERVER_ADDRESS] + --server_advertise value Used instead of the server_address when registering with discovery. 127.0.0.1:8080 [$MICRO_SERVER_ADVERTISE] + --server_metadata value A list of key-value pairs defining metadata. version=1.0.0 [$MICRO_SERVER_METADATA] + --broker value Broker for pub/sub. http, nats, rabbitmq [$MICRO_BROKER] + --broker_address value Comma-separated list of broker addresses [$MICRO_BROKER_ADDRESS] + --registry value Registry for discovery. consul, mdns [$MICRO_REGISTRY] + --registry_address value Comma-separated list of registry addresses [$MICRO_REGISTRY_ADDRESS] + --selector value Selector used to pick nodes for querying [$MICRO_SELECTOR] + --transport value Transport mechanism used; http [$MICRO_TRANSPORT] + --transport_address value Comma-separated list of transport addresses [$MICRO_TRANSPORT_ADDRESS] + --db_path value Path to sqlite db (e.g. /data/agents.db) (default: "agents.db") [$DB_PATH] + --help, -h show help + + --register_ttl REGISTER_TTL + --register_interval REGISTER_INTERVAL + --server_name SERVER_NAME + --server_version SERVER_VERSION + --server_id SERVER_ID + --server_advertise SERVER_ADVERTISE + --broker BROKER + --broker_address BROKER_ADDRESS + --registry REGISTRY + --registry_address REGISTRY_ADDRESS + --selector SELECTOR + --transport TRANSPORT + --transport_address TRANSPORT_ADDRESS + --db_path DB_PATH + + --server_address SERVER_ADDRESS + --ca_cert CA_CERT + --server_cert SERVER_CERT + --server_key SERVER_KEY +*/ + +type Options interface { + Context() context.Context + Name() string + Address() string + CACert() string + Cert() string + Key() string + TLSConfig() tls.Config + DB() *gorm.DB + BeforeStart() []func() error + AfterStart() []func() error + BeforeStop() []func() error + AfterStop() []func() error + ServerOpts() []grpc.ServerOption + ServerInterceptors() []grpc.UnaryServerInterceptor + StreamServerInterceptors() []grpc.StreamServerInterceptor + ClientInterceptors() []grpc.UnaryClientInterceptor + StreamClientInterceptors() []grpc.StreamClientInterceptor + Defaults() +} + +func NewOptions() *options { + return &options{ + ctx: context.Background(), + address: ":0", + } +} + +func (o *options) Defaults() { + if o.ctx == nil { + o.ctx = context.Background() + } + if o.address == "" { + o.address = "0.0.0.0:0" + } +} + +type Option func(*options) + +func WithName(name string) Option { + return func(o *options) { + o.name = name + } +} + +// Context specifies a context for the service. +// Can be used to signal shutdown of the service. +// Can be used for extra option values. +func WithContext(ctx context.Context) Option { + return func(o *options) { + o.ctx = ctx + } +} + +// Address sets the address of the server +func WithAddress(addr string) Option { + return func(o *options) { + o.address = addr + } +} + +func WithGRPCServerOpts(opts ...grpc.ServerOption) Option { + return func(o *options) { + o.serverOpts = append(o.serverOpts, opts...) + } +} + +func WithCACert(path string) Option { + return func(o *options) { + o.caCert = path + } +} + +func WithCert(path string) Option { + return func(o *options) { + o.cert = path + } +} + +func WithKey(path string) Option { + return func(o *options) { + o.key = path + } +} + +func WithDB(db *gorm.DB) Option { + return func(o *options) { + o.db = db + } +} + +func WithTLSConfig(conf *tls.Config) Option { + return func(o *options) { + if conf != nil { + o.tlsConfig = *conf + } + } +} + +func WithBeforeStart(fn ...func() error) Option { + return func(o *options) { + o.beforeStart = append(o.beforeStart, fn...) + } +} + +func WithBeforeStop(fn ...func() error) Option { + return func(o *options) { + o.beforeStop = append(o.beforeStop, fn...) + } +} + +func WithAfterStart(fn ...func() error) Option { + return func(o *options) { + o.afterStart = append(o.afterStart, fn...) + } +} + +func WithAfterStop(fn ...func() error) Option { + return func(o *options) { + o.afterStop = append(o.afterStop, fn...) + } +} + +func WithUnaryClientInterceptor(i ...grpc.UnaryClientInterceptor) Option { + return func(o *options) { + o.clientInterceptors = append(o.clientInterceptors, i...) + } +} + +// WrapHandler adds a handler Wrapper to a list of options passed into the server +func WithUnaryServerInterceptor(i ...grpc.UnaryServerInterceptor) Option { + return func(o *options) { + o.serverInterceptors = append(o.serverInterceptors, i...) + } +} + +func WithStreamServerInterceptor(i ...grpc.StreamServerInterceptor) Option { + return func(o *options) { + o.streamServerInterceptors = append(o.streamServerInterceptors, i...) + } +} + +func WithStreamClientInterceptor(i ...grpc.StreamClientInterceptor) Option { + return func(o *options) { + o.streamClientInterceptors = append(o.streamClientInterceptors, i...) + } +} + +// WrapSubscriber adds a subscriber Wrapper to a list of options passed into the server +func WithSubscriberInterceptor(w ...interface{}) Option { + return func(o *options) { + + } +} + +type options struct { + ctx context.Context + name string + address string + caCert string + cert string + key string + tlsConfig tls.Config + db *gorm.DB + + beforeStart []func() error + afterStart []func() error + beforeStop []func() error + afterStop []func() error + + serverOpts []grpc.ServerOption + + serverInterceptors []grpc.UnaryServerInterceptor + streamServerInterceptors []grpc.StreamServerInterceptor + + clientInterceptors []grpc.UnaryClientInterceptor + streamClientInterceptors []grpc.StreamClientInterceptor +} + +func (o *options) Name() string { + return o.name +} + +func (o *options) Context() context.Context { + return o.ctx +} + +func (o *options) Address() string { + return o.address +} + +func (o *options) CACert() string { + return o.caCert +} + +func (o *options) Cert() string { + return o.cert +} + +func (o *options) Key() string { + return o.key +} + +func (o *options) TLSConfig() tls.Config { + return o.tlsConfig +} + +func (o *options) DB() *gorm.DB { + return o.db +} + +func (o *options) BeforeStart() []func() error { + return o.beforeStart +} + +func (o *options) AfterStart() []func() error { + return o.afterStart +} + +func (o *options) BeforeStop() []func() error { + return o.beforeStop +} + +func (o *options) AfterStop() []func() error { + return o.afterStop +} + +func (o *options) ServerOpts() []grpc.ServerOption { + return o.serverOpts +} + +func (o *options) ServerInterceptors() []grpc.UnaryServerInterceptor { + return o.serverInterceptors +} + +func (o *options) StreamServerInterceptors() []grpc.StreamServerInterceptor { + return o.streamServerInterceptors +} + +func (o *options) ClientInterceptors() []grpc.UnaryClientInterceptor { + return o.clientInterceptors +} + +func (o *options) StreamClientInterceptors() []grpc.StreamClientInterceptor { + return o.streamClientInterceptors +} + +func (o *options) parseTLSConfig() error { + if o.hasTLSConfig() { + return nil + } + caCert, err := ioutil.ReadFile(o.caCert) + if err != nil { + return err + } + caCertPool := x509.NewCertPool() + ok := caCertPool.AppendCertsFromPEM(caCert) + if !ok { + return fmt.Errorf("failed to load CA Cert from %s", o.caCert) + } + cert, err := tls.LoadX509KeyPair(o.cert, o.key) + if err != nil { + return err + } + o.tlsConfig = tls.Config{ + ClientAuth: tls.RequireAndVerifyClientCert, + ClientCAs: caCertPool, + RootCAs: caCertPool, + Certificates: []tls.Certificate{cert}, + } + return nil +} + +func (o *options) hasTLSConfig() bool { + return reflect.DeepEqual(o.tlsConfig, tls.Config{}) +} diff --git a/service/service.go b/service/service.go new file mode 100644 index 0000000..690121a --- /dev/null +++ b/service/service.go @@ -0,0 +1,148 @@ +package service + +import ( + "net" + "os" + "sync" + + grpcmiddleware "github.com/grpc-ecosystem/go-grpc-middleware" + "github.com/jinzhu/gorm" + "github.com/spf13/cobra" + "google.golang.org/grpc" +) + +type Service interface { + Options() Options + Server() *grpc.Server + DB() *gorm.DB + Start() error + Stop() error + Close() error + Cmd() *cobra.Command +} + +func New(opts ...Option) (Service, error) { + return newService(opts...) +} + +type service struct { + cmd *cobra.Command + opts *options + server *grpc.Server + list net.Listener + mu sync.Mutex + running bool +} + +func newService(opts ...Option) (*service, error) { + cmd.ParseFlags(os.Args) + s := &service{ + opts: parseFlags(NewOptions()), + cmd: cmd, + } + s.mu.Lock() + defer s.mu.Unlock() + for _, f := range opts { + f(s.opts) + } + go func() { + for { + select { + case <-s.opts.ctx.Done(): + s.Stop() + } + } + }() + if err := s.opts.parseTLSConfig(); err != nil { + return nil, err + } + cmd.Use = s.opts.name + cmd.RunE = func(cmd *cobra.Command, args []string) error { + if cmd.Use == "" { + cmd.Use = os.Args[0] + } + return s.run() + } + gopts := []grpc.ServerOption{grpc.UnaryInterceptor(grpcmiddleware.ChainUnaryServer(s.opts.serverInterceptors...))} + // TODO : check tls config and tls auth + // grpc.Creds(credentials.NewTLS(&s.opts.tlsConfig)) + s.server = grpc.NewServer(append(gopts, s.opts.serverOpts...)...) + return s, nil +} + +func (s *service) Options() Options { + return s.opts +} + +func (s *service) DB() *gorm.DB { + return s.opts.db +} + +func (s *service) Server() *grpc.Server { + return s.server +} + +func (s *service) Cmd() *cobra.Command { + return s.cmd +} + +func (s *service) run() error { + s.mu.Lock() + for i := range s.opts.beforeStart { + if err := s.opts.beforeStart[i](); err != nil { + return err + } + } + var err error + s.running = true + s.list, err = net.Listen("tcp", s.opts.address) + if err != nil { + s.mu.Unlock() + return err + } + s.opts.address = s.list.Addr().String() + errs := make(chan error) + go func() { + errs <- s.server.Serve(s.list) + }() + for i := range s.opts.afterStart { + if err := s.opts.afterStart[i](); err != nil { + s.mu.Unlock() + s.Stop() + return err + } + } + s.mu.Unlock() + return <- errs +} + +func (s *service) Start() error { + return s.cmd.Execute() +} + +func (s *service) Stop() error { + s.mu.Lock() + defer s.mu.Unlock() + if ! s.running { + return nil + } + for i := range s.opts.beforeStop { + if err := s.opts.beforeStop[i](); err != nil { + return err + } + } + s.server.GracefulStop() + s.running = false + for i := range s.opts.afterStop { + if err := s.opts.afterStop[i](); err != nil { + + } + } + return nil +} + +func (s *service) Close() error { + s.mu.Lock() + defer s.mu.Unlock() + return s.Stop() +}