diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..0caf248 --- /dev/null +++ b/Makefile @@ -0,0 +1,14 @@ +#!/usr/bin/make -f +SHELL = bash + +# Run Unit Test with go test +test: + @go test ./... -count=1 + +# Run linters +lint: + @golangci-lint --timeout=5m run + +# Run staticcheck +staticcheck: + @staticcheck ./... \ No newline at end of file diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..08ed344 --- /dev/null +++ b/go.mod @@ -0,0 +1,33 @@ +module git.frostfs.info/TrueCloudLab/frostfs-observability + +go 1.19 + +require ( + github.com/stretchr/testify v1.8.3 + go.opentelemetry.io/otel v1.16.0 + go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.16.0 + go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.16.0 + go.opentelemetry.io/otel/sdk v1.16.0 + go.opentelemetry.io/otel/trace v1.16.0 + google.golang.org/grpc v1.55.0 + google.golang.org/protobuf v1.30.0 +) + +require ( + github.com/cenkalti/backoff/v4 v4.2.1 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/go-logr/logr v1.2.4 // indirect + github.com/go-logr/stdr v1.2.2 // indirect + github.com/golang/protobuf v1.5.3 // indirect + github.com/grpc-ecosystem/grpc-gateway/v2 v2.7.0 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.16.0 // indirect + go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.16.0 // indirect + go.opentelemetry.io/otel/metric v1.16.0 // indirect + go.opentelemetry.io/proto/otlp v0.19.0 // indirect + golang.org/x/net v0.8.0 // indirect + golang.org/x/sys v0.8.0 // indirect + golang.org/x/text v0.8.0 // indirect + google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..96070d7 --- /dev/null +++ b/go.sum @@ -0,0 +1,453 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 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h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k= +honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k= +rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8= +rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0= +rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA= diff --git a/tracing/config.go b/tracing/config.go new file mode 100644 index 0000000..8bb5db5 --- /dev/null +++ b/tracing/config.go @@ -0,0 +1,76 @@ +package tracing + +import "fmt" + +// Exporter is type of tracing target. +type Exporter string + +const ( + StdoutExporter Exporter = "stdout" + OTLPgRPCExporter Exporter = "otlp_grpc" + NoOpExporter Exporter = "noop" +) + +type Config struct { + // Enabled is true, if tracing enabled. + Enabled bool + // Exporter is collector type. + Exporter Exporter + // Endpoint is collector endpoint for OTLP exporters. + Endpoint string + + // Service is service name that will be used in tracing. + // Mandatory. + Service string + // InstanceID is identity of service instance. + // Optional. + InstanceID string + // Version is version of service instance. + // Optional. + Version string +} + +func (c *Config) validate() error { + if !c.Enabled { + return nil + } + + if c.Exporter != StdoutExporter && c.Exporter != OTLPgRPCExporter && c.Exporter != NoOpExporter { + return fmt.Errorf("tracing config error: unknown exporter '%s', valid values are %v", + c.Exporter, []string{string(StdoutExporter), string(OTLPgRPCExporter), string(NoOpExporter)}) + } + + if len(c.Service) == 0 { + return fmt.Errorf("tracing config error: service name must be specified") + } + + if c.Exporter == OTLPgRPCExporter && len(c.Endpoint) == 0 { + return fmt.Errorf("tracing config error: exporter '%s' requires endpoint", c.Exporter) + } + + return nil +} + +func (c *Config) hasChange(other *Config) bool { + if !c.Enabled && !other.Enabled { + return false + } + if c.Enabled != other.Enabled { + return true + } + + if (c.Exporter == StdoutExporter && other.Exporter == StdoutExporter) || + (c.Exporter == NoOpExporter && other.Exporter == NoOpExporter) { + return !c.serviceInfoEqual(other) + } + + return c.Exporter != other.Exporter || + c.Endpoint != other.Endpoint || + !c.serviceInfoEqual(other) +} + +func (c *Config) serviceInfoEqual(other *Config) bool { + return c.Service == other.Service && + c.InstanceID == other.InstanceID && + c.Version == other.Version +} diff --git a/tracing/config_test.go b/tracing/config_test.go new file mode 100644 index 0000000..2cbd8e0 --- /dev/null +++ b/tracing/config_test.go @@ -0,0 +1,243 @@ +package tracing + +import ( + "testing" +) + +func TestConfig_validate(t *testing.T) { + tests := []struct { + name string + config Config + wantErr bool + }{ + { + name: "disabled", + wantErr: false, + config: Config{ + Enabled: false, + }, + }, + { + name: "stdout", + wantErr: false, + config: Config{ + Enabled: true, + Exporter: StdoutExporter, + Service: "test", + InstanceID: "s01", + Version: "v0.0.1", + }, + }, + { + name: "noop", + wantErr: false, + config: Config{ + Enabled: true, + Exporter: StdoutExporter, + Service: "test", + InstanceID: "s01", + Version: "v0.0.1", + }, + }, + { + name: "OTLP gRPC", + wantErr: false, + config: Config{ + Enabled: true, + Exporter: OTLPgRPCExporter, + Service: "test", + Endpoint: "localhost:4717", + InstanceID: "s01", + Version: "v0.0.1", + }, + }, + { + name: "unknown exporter", + wantErr: true, + config: Config{ + Enabled: true, + Exporter: "unknown", + Service: "test", + Endpoint: "localhost:4717", + InstanceID: "s01", + Version: "v0.0.1", + }, + }, + { + name: "no exporter", + wantErr: true, + config: Config{ + Enabled: true, + Service: "test", + Endpoint: "localhost:4717", + InstanceID: "s01", + Version: "v0.0.1", + }, + }, + { + name: "no service", + wantErr: true, + config: Config{ + Enabled: true, + Exporter: OTLPgRPCExporter, + Endpoint: "localhost:4717", + InstanceID: "s01", + Version: "v0.0.1", + }, + }, + { + name: "no endpoint for grpc", + wantErr: true, + config: Config{ + Enabled: true, + Exporter: OTLPgRPCExporter, + Service: "test", + InstanceID: "s01", + Version: "v0.0.1", + }, + }, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + if err := tt.config.validate(); (err != nil) != tt.wantErr { + t.Errorf("Config.validate() error = %v, wantErr %v", err, tt.wantErr) + } + }) + } +} + +func TestConfig_hasChange(t *testing.T) { + tests := []struct { + name string + config Config + other Config + want bool + }{ + { + name: "disabled configs always equal", + want: false, + config: Config{ + Enabled: false, + Exporter: StdoutExporter, + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + other: Config{ + Enabled: false, + Exporter: OTLPgRPCExporter, + Endpoint: "localhost:4717", + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + }, + { + name: "enabled", + want: true, + config: Config{ + Enabled: false, + Exporter: OTLPgRPCExporter, + Endpoint: "localhost:4717", + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + other: Config{ + Enabled: true, + Exporter: OTLPgRPCExporter, + Endpoint: "localhost:4717", + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + }, + { + name: "disabled", + want: true, + config: Config{ + Enabled: true, + Exporter: OTLPgRPCExporter, + Endpoint: "localhost:4717", + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + other: Config{ + Enabled: false, + Exporter: OTLPgRPCExporter, + Endpoint: "localhost:4717", + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + }, + { + name: "do not use endpoint for stdout", + want: false, + config: Config{ + Enabled: true, + Exporter: StdoutExporter, + Endpoint: "localhost:4717", + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + other: Config{ + Enabled: true, + Exporter: StdoutExporter, + Endpoint: "otherhost:4717", + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + }, + { + name: "do not use endpoint for noop", + want: false, + config: Config{ + Enabled: true, + Exporter: NoOpExporter, + Endpoint: "localhost:4717", + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + other: Config{ + Enabled: true, + Exporter: NoOpExporter, + Endpoint: "otherhost:4717", + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + }, + { + name: "use endpoint for grpc", + want: true, + config: Config{ + Enabled: true, + Exporter: OTLPgRPCExporter, + Endpoint: "localhost:4717", + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + other: Config{ + Enabled: true, + Exporter: OTLPgRPCExporter, + Endpoint: "otherhost:4717", + Service: "test", + InstanceID: "s01", + Version: "v1.0.0", + }, + }, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + if got := tt.config.hasChange(&tt.other); got != tt.want { + t.Errorf("Config.equal() = %v, want %v", got, tt.want) + } + }) + } +} diff --git a/tracing/examples/grpc/main.go b/tracing/examples/grpc/main.go new file mode 100644 index 0000000..37aff9d --- /dev/null +++ b/tracing/examples/grpc/main.go @@ -0,0 +1,109 @@ +package main + +import ( + "context" + "fmt" + "log" + "net" + "sync" + "time" + + "git.frostfs.info/TrueCloudLab/frostfs-observability/tracing" + srv "git.frostfs.info/TrueCloudLab/frostfs-observability/tracing/examples/grpc/server" + tracing_grpc "git.frostfs.info/TrueCloudLab/frostfs-observability/tracing/grpc" + "go.opentelemetry.io/otel/trace" + "google.golang.org/grpc" + "google.golang.org/grpc/credentials/insecure" +) + +type server struct { + srv.UnimplementedServerServer +} + +func (s *server) Echo(ctx context.Context, req *srv.Request) (*srv.Response, error) { + sc := trace.SpanFromContext(ctx).SpanContext() + if !sc.TraceID().IsValid() || !sc.SpanID().IsValid() { + return nil, fmt.Errorf("no trace id or span id on server side") + } + log.Printf("server trace id: %v", sc.TraceID()) + log.Printf("server span id: %v", sc.SpanID()) + return &srv.Response{ + Value: req.GetValue(), + }, nil +} + +func verifyClientTraceID(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error { + sc := trace.SpanFromContext(ctx).SpanContext() + if !sc.TraceID().IsValid() || !sc.SpanID().IsValid() { + return fmt.Errorf("no trace id or span id on client side") + } + log.Printf("client trace id: %v", sc.TraceID()) + log.Printf("client span id: %v", sc.SpanID()) + return invoker(ctx, method, req, reply, cc, opts...) +} + +func main() { + ctx := context.Background() + + tracingCfg := tracing.Config{ + Enabled: true, + Exporter: tracing.NoOpExporter, + Service: "example-grpc", + } + enabled, err := tracing.Setup(ctx, tracingCfg) + if err != nil { + log.Fatalf("failed to setup tracing: %v", err) + } + if !enabled { + log.Fatalf("failed to enable tracing") + } + + lis, err := net.Listen("tcp", ":7000") + if err != nil { + log.Fatalf("failed to listen: %v", err) + } + s := grpc.NewServer( + grpc.ChainStreamInterceptor(tracing_grpc.NewStreamServerInterceptor()), + grpc.ChainUnaryInterceptor(tracing_grpc.NewUnaryServerInterceptor()), + ) + srv.RegisterServerServer(s, &server{}) + + wg := &sync.WaitGroup{} + wg.Add(1) + go func() { + defer wg.Done() + if err := s.Serve(lis); err != nil { + log.Fatalf("failed to serve: %v", err) + } + }() + + time.Sleep(1 * time.Second) + + cc, err := grpc.DialContext(ctx, + ":7000", + grpc.WithTransportCredentials(insecure.NewCredentials()), + grpc.WithChainUnaryInterceptor( + tracing_grpc.NewUnaryClientInteceptor(), + verifyClientTraceID, + ), + grpc.WithChainStreamInterceptor( + tracing_grpc.NewStreamClientInterceptor(), + ), + ) + if err != nil { + log.Fatalf("failed to dial: %v", err) + } + client := srv.NewServerClient(cc) + resp, err := client.Echo(ctx, &srv.Request{ + Value: "Hello!", + }) + + if err != nil { + log.Fatalf("failed to get response: %v", err) + } + log.Printf("response received: %s", resp.GetValue()) + + s.GracefulStop() + + wg.Wait() +} diff --git a/tracing/examples/grpc/server/server.pb.go b/tracing/examples/grpc/server/server.pb.go new file mode 100644 index 0000000..9ea6ed7 Binary files /dev/null and b/tracing/examples/grpc/server/server.pb.go differ diff --git a/tracing/examples/grpc/server/server.proto b/tracing/examples/grpc/server/server.proto new file mode 100644 index 0000000..3a4e419 --- /dev/null +++ b/tracing/examples/grpc/server/server.proto @@ -0,0 +1,17 @@ +syntax = "proto3"; + +package server; + +option go_package = "git.frostfs.info/TrueCloudLab/frostfs-observability/tracing/example_grpc/server"; + +service Server { + rpc Echo(Request) returns (Response); +} + +message Request { + string value = 1; +} + +message Response { + string value = 1; +} \ No newline at end of file diff --git a/tracing/grpc/carrier.go b/tracing/grpc/carrier.go new file mode 100644 index 0000000..6ee5575 --- /dev/null +++ b/tracing/grpc/carrier.go @@ -0,0 +1,29 @@ +package grpc + +import ( + "google.golang.org/grpc/metadata" +) + +type grpcMetadataCarrier struct { + md *metadata.MD +} + +func (c *grpcMetadataCarrier) Get(key string) string { + values := c.md.Get(key) + if len(values) > 0 { + return values[0] + } + return "" +} + +func (c *grpcMetadataCarrier) Set(key string, value string) { + c.md.Set(key, value) +} + +func (c *grpcMetadataCarrier) Keys() []string { + result := make([]string, 0, c.md.Len()) + for key := range *c.md { + result = append(result, key) + } + return result +} diff --git a/tracing/grpc/client.go b/tracing/grpc/client.go new file mode 100644 index 0000000..ce750be --- /dev/null +++ b/tracing/grpc/client.go @@ -0,0 +1,76 @@ +package grpc + +import ( + "context" + + "google.golang.org/grpc" + "google.golang.org/grpc/metadata" +) + +type clientStream struct { + originalStream grpc.ClientStream + desc *grpc.StreamDesc + finished chan<- error + done <-chan struct{} +} + +func newgRPCClientStream(originalStream grpc.ClientStream, desc *grpc.StreamDesc, finished chan<- error, done <-chan struct{}) grpc.ClientStream { + return &clientStream{ + originalStream: originalStream, + desc: desc, + finished: finished, + done: done, + } +} + +func (cs *clientStream) Header() (metadata.MD, error) { + md, err := cs.originalStream.Header() + if err != nil { + select { + case <-cs.done: + case cs.finished <- err: + } + } + return md, err +} + +func (cs *clientStream) Trailer() metadata.MD { + return cs.originalStream.Trailer() +} + +func (cs *clientStream) CloseSend() error { + err := cs.originalStream.CloseSend() + if err != nil { + select { + case <-cs.done: + case cs.finished <- err: + } + } + return err +} + +func (cs *clientStream) Context() context.Context { + return cs.originalStream.Context() +} + +func (cs *clientStream) SendMsg(m any) error { + err := cs.originalStream.SendMsg(m) + if err != nil { + select { + case <-cs.done: + case cs.finished <- err: + } + } + return err +} + +func (cs *clientStream) RecvMsg(m any) error { + err := cs.originalStream.RecvMsg(m) + if err != nil || !cs.desc.ServerStreams { + select { + case <-cs.done: + case cs.finished <- err: + } + } + return err +} diff --git a/tracing/grpc/interceptors.go b/tracing/grpc/interceptors.go new file mode 100644 index 0000000..a9bef07 --- /dev/null +++ b/tracing/grpc/interceptors.go @@ -0,0 +1,160 @@ +package grpc + +import ( + "context" + "io" + + "git.frostfs.info/TrueCloudLab/frostfs-observability/tracing" + "go.opentelemetry.io/otel/attribute" + "go.opentelemetry.io/otel/codes" + semconv "go.opentelemetry.io/otel/semconv/v1.17.0" + "go.opentelemetry.io/otel/trace" + "google.golang.org/grpc" + grpc_codes "google.golang.org/grpc/codes" + "google.golang.org/grpc/metadata" + "google.golang.org/grpc/status" +) + +// NewUnaryClientInteceptor creates new gRPC unary interceptor to save gRPC client traces. +func NewUnaryClientInteceptor() grpc.UnaryClientInterceptor { + return func(ctx context.Context, method string, req, reply any, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error { + ctx, span := startClientSpan(ctx, cc, method) + defer span.End() + + err := invoker(ctx, method, req, reply, cc, opts...) + if err != nil { + grpcStatus, _ := status.FromError(err) + span.SetStatus(codes.Error, grpcStatus.Message()) + span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpcStatus.Code()))) + } else { + span.SetStatus(codes.Ok, "") + span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpc_codes.OK))) + } + + return err + } +} + +// NewStreamClientInterceptor creates new gRPC stream interceptor to save gRPC client traces. +func NewStreamClientInterceptor() grpc.StreamClientInterceptor { + return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) { + ctx, span := startClientSpan(ctx, cc, method) + str, err := streamer(ctx, desc, cc, method, opts...) + if err != nil { + grpcStatus, _ := status.FromError(err) + span.SetStatus(codes.Error, grpcStatus.Message()) + span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpcStatus.Code()))) + span.End() + return str, err + } + + finished := make(chan error) + done := make(chan struct{}) + strWrp := newgRPCClientStream(str, desc, finished, done) + + go func() { + defer close(done) + defer span.End() + + select { + case err := <-finished: + if err == nil || err == io.EOF { + setGRPCSpanStatus(span, nil) + } else { + setGRPCSpanStatus(span, err) + } + return + case <-ctx.Done(): + setGRPCSpanStatus(span, ctx.Err()) + return + } + }() + + return strWrp, nil + } +} + +// NewUnaryServerInterceptor creates new gRPC unary interceptor to save gRPC server traces. +func NewUnaryServerInterceptor() grpc.UnaryServerInterceptor { + return func(ctx context.Context, req any, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) { + ctx = extractGRPCTraceInfo(ctx) + var span trace.Span + ctx, span = tracing.StartSpanFromContext(ctx, info.FullMethod, + trace.WithAttributes( + semconv.RPCSystemGRPC, + semconv.RPCMethod(info.FullMethod), + ), + trace.WithSpanKind(trace.SpanKindServer)) + defer span.End() + + resp, err = handler(ctx, req) + + setGRPCSpanStatus(span, err) + return + } +} + +// NewStreamServerInterceptor creates new gRPC stream interceptor to save gRPC server traces. +func NewStreamServerInterceptor() grpc.StreamServerInterceptor { + return func(srv any, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error { + ctx := extractGRPCTraceInfo(ss.Context()) + var span trace.Span + ctx, span = tracing.StartSpanFromContext(ctx, info.FullMethod, + trace.WithAttributes( + semconv.RPCSystemGRPC, + semconv.RPCMethod(info.FullMethod), + ), + trace.WithSpanKind(trace.SpanKindServer)) + defer span.End() + + err := handler(srv, newgRPCServerStream(ctx, ss)) + + setGRPCSpanStatus(span, err) + return err + } +} + +func startClientSpan(ctx context.Context, cc *grpc.ClientConn, method string) (context.Context, trace.Span) { + ctx, span := tracing.StartSpanFromContext(ctx, method, trace.WithAttributes( + semconv.RPCSystemGRPC, + semconv.RPCMethod(method), + attribute.String("rpc.grpc.target", cc.Target())), + trace.WithSpanKind(trace.SpanKindClient), + ) + ctx = setGRPCTraceInfo(ctx) + return ctx, span +} + +func setGRPCSpanStatus(span trace.Span, err error) { + if err != nil { + grpcStatus, _ := status.FromError(err) + span.SetStatus(codes.Error, grpcStatus.Message()) + span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpcStatus.Code()))) + } else { + span.SetStatus(codes.Ok, "") + span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpc_codes.OK))) + } +} + +func extractGRPCTraceInfo(ctx context.Context) context.Context { + md, ok := metadata.FromIncomingContext(ctx) + if !ok { + return ctx + } + carrier := &grpcMetadataCarrier{ + md: &md, + } + return tracing.Propagator.Extract(ctx, carrier) +} + +func setGRPCTraceInfo(ctx context.Context) context.Context { + md, ok := metadata.FromOutgoingContext(ctx) + if !ok { + md = metadata.MD{} + } + carrier := &grpcMetadataCarrier{ + md: &md, + } + tracing.Propagator.Inject(ctx, carrier) + return metadata.NewOutgoingContext(ctx, md) +} diff --git a/tracing/grpc/server.go b/tracing/grpc/server.go new file mode 100644 index 0000000..766fdd8 --- /dev/null +++ b/tracing/grpc/server.go @@ -0,0 +1,44 @@ +package grpc + +import ( + "context" + + "google.golang.org/grpc" + "google.golang.org/grpc/metadata" +) + +type serverStream struct { + originalStream grpc.ServerStream + ctx context.Context // nolint:containedctx +} + +func newgRPCServerStream(ctx context.Context, originalStream grpc.ServerStream) grpc.ServerStream { + return &serverStream{ + originalStream: originalStream, + ctx: ctx, + } +} + +func (ss *serverStream) SetHeader(md metadata.MD) error { + return ss.originalStream.SendHeader(md) +} + +func (ss *serverStream) SendHeader(md metadata.MD) error { + return ss.originalStream.SendHeader(md) +} + +func (ss *serverStream) SetTrailer(md metadata.MD) { + ss.originalStream.SetTrailer(md) +} + +func (ss *serverStream) Context() context.Context { + return ss.ctx +} + +func (ss *serverStream) SendMsg(m any) error { + return ss.originalStream.SendMsg(m) +} + +func (ss *serverStream) RecvMsg(m any) error { + return ss.originalStream.RecvMsg(m) +} diff --git a/tracing/propagator.go b/tracing/propagator.go new file mode 100644 index 0000000..4b7c70a --- /dev/null +++ b/tracing/propagator.go @@ -0,0 +1,94 @@ +package tracing + +import ( + "context" + "fmt" + "strconv" + + "go.opentelemetry.io/otel/propagation" + "go.opentelemetry.io/otel/trace" +) + +const ( + traceIDHeader = "x-frostfs-trace-id" + spanIDHeader = "x-frostfs-span-id" + flagsHeader = "x-frostfs-trace-flags" +) + +const ( + flagsSampled = 1 << iota +) + +// propagator serializes SpanContext to/from headers. +// x-frostfs-trace-id - TraceID, 16 bytes, hex-string (32 bytes). +// x-frostfs-span-id - SpanID, 8 bytes, hexstring (16 bytes). +// x-frostfs-trace-flags - trace flags (now sampled only). +type propagator struct{} + +// Propagator is propagation.TextMapPropagator instance, used to extract/inject trace info from/to remote context. +var Propagator propagation.TextMapPropagator = &propagator{} + +// Inject injects tracing info to carrier. +func (p *propagator) Inject(ctx context.Context, carrier propagation.TextMapCarrier) { + sc := trace.SpanFromContext(ctx).SpanContext() + if !sc.TraceID().IsValid() || !sc.SpanID().IsValid() { + return + } + + var flags int + if sc.IsSampled() { + flags |= flagsSampled + } + + carrier.Set(traceIDHeader, sc.TraceID().String()) + carrier.Set(spanIDHeader, sc.SpanID().String()) + carrier.Set(flagsHeader, fmt.Sprintf("%x", flags)) +} + +// Extract extracts tracing info from carrier and returns context with tracing info. +// In case of error returns ctx. +func (p *propagator) Extract(ctx context.Context, carrier propagation.TextMapCarrier) context.Context { + spanConfig := trace.SpanContextConfig{} + var err error + + traceIDStr := carrier.Get(traceIDHeader) + traceIDDefined := traceIDStr != "" + if traceIDDefined { + spanConfig.TraceID, err = trace.TraceIDFromHex(traceIDStr) + if err != nil { + return ctx + } + } + + spanIDstr := carrier.Get(spanIDHeader) + spanIDDefined := spanIDstr != "" + if spanIDDefined { + spanConfig.SpanID, err = trace.SpanIDFromHex(spanIDstr) + if err != nil { + return ctx + } + } + + if traceIDDefined != spanIDDefined { + return ctx //traceID + spanID must be defined OR no traceID and no spanID + } + + flagsStr := carrier.Get(flagsHeader) + if flagsStr != "" { + var v int64 + v, err = strconv.ParseInt(flagsStr, 16, 32) + if err != nil { + return ctx + } + if v&flagsSampled == flagsSampled { + spanConfig.TraceFlags = trace.FlagsSampled + } + } + + return trace.ContextWithRemoteSpanContext(ctx, trace.NewSpanContext(spanConfig)) +} + +// Fields returns the keys whose values are set with Inject. +func (p *propagator) Fields() []string { + return []string{traceIDHeader, spanIDHeader, flagsHeader} +} diff --git a/tracing/propagator_test.go b/tracing/propagator_test.go new file mode 100644 index 0000000..fc81e48 --- /dev/null +++ b/tracing/propagator_test.go @@ -0,0 +1,257 @@ +package tracing + +import ( + "context" + "encoding/hex" + "math/rand" + "testing" + + "github.com/stretchr/testify/require" + "go.opentelemetry.io/otel/trace" +) + +type testCarrier struct { + Values map[string]string +} + +func (c *testCarrier) Get(key string) string { + return c.Values[key] +} + +func (c *testCarrier) Set(key string, value string) { + c.Values[key] = value +} + +func (c *testCarrier) Keys() []string { + res := make([]string, 0, len(c.Values)) + for k := range c.Values { + res = append(res, k) + } + return res +} + +var p = &propagator{} + +func TestPropagator_Inject(t *testing.T) { + t.Run("injects trace_id and span_id if valid", func(t *testing.T) { + traceIDBytes := make([]byte, 16) + rand.Read(traceIDBytes) + traceIDHex := hex.EncodeToString(traceIDBytes) + + spanIDBytes := make([]byte, 8) + rand.Read(spanIDBytes) + spanIDHex := hex.EncodeToString(spanIDBytes) + + spanConfig := trace.SpanContextConfig{} + spanConfig.TraceID, _ = trace.TraceIDFromHex(traceIDHex) + spanConfig.SpanID, _ = trace.SpanIDFromHex(spanIDHex) + spanConfig.TraceFlags = trace.FlagsSampled + + ctx := trace.ContextWithRemoteSpanContext(context.Background(), trace.NewSpanContext(spanConfig)) + c := &testCarrier{ + Values: make(map[string]string), + } + p.Inject(ctx, c) + + require.Equal(t, 3, len(c.Values), "not all headers were saved") + require.Equal(t, traceIDHex, c.Values[traceIDHeader], "unexpected trace id") + require.Equal(t, spanIDHex, c.Values[spanIDHeader], "unexpected span id") + require.Equal(t, "1", c.Values[flagsHeader], "unexpected flags") + }) + t.Run("doesn't injects if trace_id is invalid", func(t *testing.T) { + traceIDBytes := make([]byte, 16) + traceIDHex := hex.EncodeToString(traceIDBytes) + + spanIDBytes := make([]byte, 8) + rand.Read(spanIDBytes) + spanIDHex := hex.EncodeToString(spanIDBytes) + + spanConfig := trace.SpanContextConfig{} + spanConfig.TraceID, _ = trace.TraceIDFromHex(traceIDHex) + spanConfig.SpanID, _ = trace.SpanIDFromHex(spanIDHex) + spanConfig.TraceFlags = trace.FlagsSampled + + ctx := trace.ContextWithRemoteSpanContext(context.Background(), trace.NewSpanContext(spanConfig)) + c := &testCarrier{ + Values: make(map[string]string), + } + p.Inject(ctx, c) + + require.Equal(t, 0, len(c.Values), "some headers were saved") + }) + t.Run("doesn't injects if span_id is invalid", func(t *testing.T) { + traceIDBytes := make([]byte, 16) + rand.Read(traceIDBytes) + traceIDHex := hex.EncodeToString(traceIDBytes) + + spanIDBytes := make([]byte, 8) + spanIDHex := hex.EncodeToString(spanIDBytes) + + spanConfig := trace.SpanContextConfig{} + spanConfig.TraceID, _ = trace.TraceIDFromHex(traceIDHex) + spanConfig.SpanID, _ = trace.SpanIDFromHex(spanIDHex) + spanConfig.TraceFlags = trace.FlagsSampled + + ctx := trace.ContextWithRemoteSpanContext(context.Background(), trace.NewSpanContext(spanConfig)) + c := &testCarrier{ + Values: make(map[string]string), + } + p.Inject(ctx, c) + + require.Equal(t, 0, len(c.Values), "some headers were saved") + }) + t.Run("injects flags if no flags specified", func(t *testing.T) { + traceIDBytes := make([]byte, 16) + rand.Read(traceIDBytes) + traceIDHex := hex.EncodeToString(traceIDBytes) + + spanIDBytes := make([]byte, 8) + rand.Read(spanIDBytes) + spanIDHex := hex.EncodeToString(spanIDBytes) + + spanConfig := trace.SpanContextConfig{} + spanConfig.TraceID, _ = trace.TraceIDFromHex(traceIDHex) + spanConfig.SpanID, _ = trace.SpanIDFromHex(spanIDHex) + + ctx := trace.ContextWithRemoteSpanContext(context.Background(), trace.NewSpanContext(spanConfig)) + c := &testCarrier{ + Values: make(map[string]string), + } + p.Inject(ctx, c) + + require.Equal(t, 3, len(c.Values), "not all headers were saved") + require.Equal(t, traceIDHex, c.Values[traceIDHeader], "unexpected trace id") + require.Equal(t, spanIDHex, c.Values[spanIDHeader], "unexpected span id") + require.Equal(t, "0", c.Values[flagsHeader], "unexpected flags") + }) + +} + +func TestPropagator_Extract(t *testing.T) { + t.Run("extracts if set", func(t *testing.T) { + c := &testCarrier{ + Values: make(map[string]string), + } + + traceIDBytes := make([]byte, 16) + rand.Read(traceIDBytes) + traceIDHex := hex.EncodeToString(traceIDBytes) + c.Values[traceIDHeader] = traceIDHex + + spanIDBytes := make([]byte, 8) + rand.Read(spanIDBytes) + spanIDHex := hex.EncodeToString(spanIDBytes) + c.Values[spanIDHeader] = spanIDHex + + c.Values[flagsHeader] = "1" + + ctx := p.Extract(context.Background(), c) + + sc := trace.SpanFromContext(ctx).SpanContext() + require.True(t, sc.HasTraceID(), "trace_id was not set") + require.Equal(t, traceIDHex, sc.TraceID().String(), "trace_id doesn't match") + require.True(t, sc.HasSpanID(), "span_id was not set") + require.Equal(t, spanIDHex, sc.SpanID().String(), "span_id doesn't match") + require.True(t, sc.IsSampled(), "sampled was not set") + }) + t.Run("not extracts if only trace_id defined", func(t *testing.T) { + c := &testCarrier{ + Values: make(map[string]string), + } + + traceIDBytes := make([]byte, 16) + rand.Read(traceIDBytes) + traceIDHex := hex.EncodeToString(traceIDBytes) + c.Values[traceIDHeader] = traceIDHex + c.Values[flagsHeader] = "1" + + ctx := p.Extract(context.Background(), c) + + sc := trace.SpanFromContext(ctx).SpanContext() + require.False(t, sc.HasTraceID(), "trace_id was set") + require.False(t, sc.HasSpanID(), "span_id was set") + require.False(t, sc.IsSampled(), "sampled was set") + }) + t.Run("not extracts if only span_id defined", func(t *testing.T) { + c := &testCarrier{ + Values: make(map[string]string), + } + + spanIDBytes := make([]byte, 8) + rand.Read(spanIDBytes) + spanIDHex := hex.EncodeToString(spanIDBytes) + c.Values[spanIDHeader] = spanIDHex + c.Values[flagsHeader] = "1" + + ctx := p.Extract(context.Background(), c) + + sc := trace.SpanFromContext(ctx).SpanContext() + require.False(t, sc.HasTraceID(), "trace_id was set") + require.False(t, sc.HasSpanID(), "span_id was set") + require.False(t, sc.IsSampled(), "sampled was set") + }) + t.Run("not extracts if trace_id is in invalid", func(t *testing.T) { + c := &testCarrier{ + Values: make(map[string]string), + } + + c.Values[traceIDHeader] = "loren ipsum" + + spanIDBytes := make([]byte, 8) + rand.Read(spanIDBytes) + spanIDHex := hex.EncodeToString(spanIDBytes) + c.Values[spanIDHeader] = spanIDHex + c.Values[flagsHeader] = "1" + + ctx := p.Extract(context.Background(), c) + + sc := trace.SpanFromContext(ctx).SpanContext() + require.False(t, sc.HasTraceID(), "trace_id was set") + require.False(t, sc.HasSpanID(), "span_id was set") + require.False(t, sc.IsSampled(), "sampled was set") + }) + t.Run("not extracts if span_id is invalid", func(t *testing.T) { + c := &testCarrier{ + Values: make(map[string]string), + } + + c.Values[spanIDHeader] = "loren ipsum" + + traceIDBytes := make([]byte, 16) + rand.Read(traceIDBytes) + traceIDHex := hex.EncodeToString(traceIDBytes) + c.Values[traceIDHeader] = traceIDHex + c.Values[flagsHeader] = "1" + + ctx := p.Extract(context.Background(), c) + + sc := trace.SpanFromContext(ctx).SpanContext() + require.False(t, sc.HasTraceID(), "trace_id was set") + require.False(t, sc.HasSpanID(), "span_id was set") + require.False(t, sc.IsSampled(), "sampled was set") + }) + t.Run("not extracts if flags is invalid", func(t *testing.T) { + c := &testCarrier{ + Values: make(map[string]string), + } + + traceIDBytes := make([]byte, 16) + rand.Read(traceIDBytes) + traceIDHex := hex.EncodeToString(traceIDBytes) + c.Values[traceIDHeader] = traceIDHex + + spanIDBytes := make([]byte, 8) + rand.Read(spanIDBytes) + spanIDHex := hex.EncodeToString(spanIDBytes) + c.Values[spanIDHeader] = spanIDHex + + c.Values[flagsHeader] = "loren ipsum" + + ctx := p.Extract(context.Background(), c) + + sc := trace.SpanFromContext(ctx).SpanContext() + require.False(t, sc.HasTraceID(), "trace_id was set") + require.False(t, sc.HasSpanID(), "span_id was set") + require.False(t, sc.IsSampled(), "sampled was set") + }) +} diff --git a/tracing/setup.go b/tracing/setup.go new file mode 100644 index 0000000..2ff2ba3 --- /dev/null +++ b/tracing/setup.go @@ -0,0 +1,159 @@ +package tracing + +import ( + "context" + "fmt" + "io" + "sync" + "sync/atomic" + + "go.opentelemetry.io/otel/attribute" + "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc" + "go.opentelemetry.io/otel/exporters/stdout/stdouttrace" + "go.opentelemetry.io/otel/sdk/resource" + sdktrace "go.opentelemetry.io/otel/sdk/trace" + semconv "go.opentelemetry.io/otel/semconv/v1.17.0" + "go.opentelemetry.io/otel/trace" +) + +var ( + // tracingLock protects provider, done, config and tracer from concurrent update. + // These fields change when the config is updated or the application is shutdown. + tracingLock = &sync.Mutex{} + + provider *sdktrace.TracerProvider + done bool + + config = Config{} + tracer = getDefaultTracer() +) + +// Setup initializes global tracer. +// Returns true if global tracer was updated. +// Shutdown method must be called for graceful shutdown. +func Setup(ctx context.Context, cfg Config) (bool, error) { + if err := cfg.validate(); err != nil { + return false, err + } + + tracingLock.Lock() + defer tracingLock.Unlock() + + if done { + return false, fmt.Errorf("failed to setup tracing: already shutdown") + } + + if !config.hasChange(&cfg) { + return false, nil + } + + if !cfg.Enabled { + config = cfg + tracer.Store(&tracerHolder{Tracer: trace.NewNoopTracerProvider().Tracer("")}) + return true, flushAndShutdown(ctx) + } + + exp, err := getExporter(ctx, &cfg) + if err != nil { + return false, err + } + + prevProvider := provider + + provider = sdktrace.NewTracerProvider( + sdktrace.WithBatcher(exp), + sdktrace.WithResource(newResource(&cfg)), + ) + + config = cfg + tracer.Store(&tracerHolder{Tracer: provider.Tracer(cfg.Service)}) + + var retErr error + if prevProvider != nil { + retErr = prevProvider.ForceFlush(ctx) + if err := prevProvider.Shutdown(ctx); err != nil { + if retErr == nil { + retErr = err + } else { + retErr = fmt.Errorf("%v ; %v", retErr, err) + } + } + } + + return true, retErr +} + +// Shutdown shutdowns tracing. +func Shutdown(ctx context.Context) error { + tracingLock.Lock() + defer tracingLock.Unlock() + + if done { + return nil + } + + done = true + + config = Config{} + tracer.Store(&tracerHolder{Tracer: trace.NewNoopTracerProvider().Tracer("")}) + + return flushAndShutdown(ctx) +} + +func getDefaultTracer() *atomic.Pointer[tracerHolder] { + v := new(atomic.Pointer[tracerHolder]) + v.Store(&tracerHolder{Tracer: trace.NewNoopTracerProvider().Tracer("")}) + return v +} + +func flushAndShutdown(ctx context.Context) error { + if provider == nil { + return nil + } + + tmp := provider + provider = nil + var retErr error + retErr = tmp.ForceFlush(ctx) + if err := tmp.Shutdown(ctx); err != nil { + if retErr == nil { + retErr = err + } else { + retErr = fmt.Errorf("%v ; %v", retErr, err) + } + } + return retErr +} + +func getExporter(ctx context.Context, cfg *Config) (sdktrace.SpanExporter, error) { + switch cfg.Exporter { + default: + return nil, fmt.Errorf("failed to setup tracing: unknown tracing exporter (%s)", cfg.Exporter) + case StdoutExporter: + return stdouttrace.New() + case NoOpExporter: + return stdouttrace.New(stdouttrace.WithWriter(io.Discard)) + case OTLPgRPCExporter: + return otlptracegrpc.New(ctx, otlptracegrpc.WithEndpoint(cfg.Endpoint), otlptracegrpc.WithInsecure()) + } +} + +func newResource(cfg *Config) *resource.Resource { + attrs := []attribute.KeyValue{ + semconv.ServiceName(cfg.Service), + } + if len(cfg.Version) > 0 { + attrs = append(attrs, semconv.ServiceVersion(cfg.Version)) + } + if len(cfg.InstanceID) > 0 { + attrs = append(attrs, semconv.ServiceInstanceID(cfg.InstanceID)) + } + return resource.NewWithAttributes( + semconv.SchemaURL, + attrs..., + ) +} + +type tracerHolder struct { + Tracer trace.Tracer +} diff --git a/tracing/span.go b/tracing/span.go new file mode 100644 index 0000000..1071f47 --- /dev/null +++ b/tracing/span.go @@ -0,0 +1,12 @@ +package tracing + +import ( + "context" + + "go.opentelemetry.io/otel/trace" +) + +// StartSpanFromContext creates a span and a context.Context containing the newly-created span. +func StartSpanFromContext(ctx context.Context, operationName string, opts ...trace.SpanStartOption) (context.Context, trace.Span) { + return tracer.Load().Tracer.Start(ctx, operationName, opts...) +}