137 lines
4.2 KiB
Go
137 lines
4.2 KiB
Go
package tracing
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import (
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"context"
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"io"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/codes"
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semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
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"go.opentelemetry.io/otel/trace"
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"google.golang.org/grpc"
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grpc_codes "google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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)
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// NewGRPCUnaryClientInteceptor creates new gRPC unary interceptor to save gRPC client traces.
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func NewGRPCUnaryClientInteceptor() grpc.UnaryClientInterceptor {
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return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
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ctx, span := startClientSpan(ctx, cc, method)
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defer span.End()
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err := invoker(ctx, method, req, reply, cc, opts...)
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if err != nil {
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grpcStatus, _ := status.FromError(err)
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span.SetStatus(codes.Error, grpcStatus.Message())
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span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpcStatus.Code())))
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} else {
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span.SetStatus(codes.Ok, "")
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span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpc_codes.OK)))
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}
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return err
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}
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}
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// NewGRPCStreamClientInterceptor creates new gRPC stream interceptor to save gRPC client traces.
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func NewGRPCStreamClientInterceptor() grpc.StreamClientInterceptor {
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return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
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ctx, span := startClientSpan(ctx, cc, method)
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str, err := streamer(ctx, desc, cc, method, opts...)
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if err != nil {
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grpcStatus, _ := status.FromError(err)
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span.SetStatus(codes.Error, grpcStatus.Message())
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span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpcStatus.Code())))
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span.End()
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return str, err
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}
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finished := make(chan error)
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done := make(chan struct{})
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strWrp := newgRPCClientStream(str, desc, finished, done)
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go func() {
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defer close(finished)
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defer close(done)
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defer span.End()
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select {
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case err := <-finished:
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if err == nil || err == io.EOF {
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setGRPCSpanStatus(span, nil)
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} else {
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setGRPCSpanStatus(span, err)
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}
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return
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case <-ctx.Done():
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setGRPCSpanStatus(span, ctx.Err())
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return
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}
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}()
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return strWrp, nil
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}
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}
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// NewGRPCUnaryServerInterceptor creates new gRPC unary interceptor to save gRPC server traces.
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func NewGRPCUnaryServerInterceptor() grpc.UnaryServerInterceptor {
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return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
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ctx = extractGRPCTraceInfo(ctx)
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var span trace.Span
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ctx, span = StartSpanFromContext(ctx, info.FullMethod,
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trace.WithAttributes(
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semconv.RPCSystemGRPC,
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semconv.RPCMethod(info.FullMethod),
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),
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trace.WithSpanKind(trace.SpanKindServer))
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defer span.End()
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resp, err = handler(ctx, req)
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setGRPCSpanStatus(span, err)
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return
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}
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}
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// NewGRPCStreamServerInterceptor creates new gRPC stream interceptor to save gRPC server traces.
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func NewGRPCStreamServerInterceptor() grpc.StreamServerInterceptor {
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return func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
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ctx := extractGRPCTraceInfo(ss.Context())
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var span trace.Span
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ctx, span = StartSpanFromContext(ctx, info.FullMethod,
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trace.WithAttributes(
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semconv.RPCSystemGRPC,
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semconv.RPCMethod(info.FullMethod),
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),
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trace.WithSpanKind(trace.SpanKindServer))
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defer span.End()
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err := handler(srv, newgRPCServerStream(ctx, ss))
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setGRPCSpanStatus(span, err)
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return err
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}
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}
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func startClientSpan(ctx context.Context, cc *grpc.ClientConn, method string) (context.Context, trace.Span) {
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ctx, span := StartSpanFromContext(ctx, method, trace.WithAttributes(
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semconv.RPCSystemGRPC,
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semconv.RPCMethod(method),
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attribute.String("rpc.grpc.target", cc.Target())),
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trace.WithSpanKind(trace.SpanKindClient),
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)
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ctx = setGRPCTraceInfo(ctx)
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return ctx, span
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}
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func setGRPCSpanStatus(span trace.Span, err error) {
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if err != nil {
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grpcStatus, _ := status.FromError(err)
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span.SetStatus(codes.Error, grpcStatus.Message())
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span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpcStatus.Code())))
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} else {
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span.SetStatus(codes.Ok, "")
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span.SetAttributes(semconv.RPCGRPCStatusCodeKey.Int64(int64(grpc_codes.OK)))
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}
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}
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