cfa08f8366
This enables picking up OTLP tracing context for the gRPC requests. Also sets up the in-memory recorder that BuildKit History API can use to store the traces associated with specific build in a database after build completes. This doesn't enable Jaeger tracing endpoints from env but this can be easily enabled by adding another import if maintainers want it. Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
81 lines
2.8 KiB
Go
81 lines
2.8 KiB
Go
package grpc // import "github.com/docker/docker/api/server/router/grpc"
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import (
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"context"
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"strings"
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"github.com/docker/docker/api/server/router"
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grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
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"github.com/moby/buildkit/util/grpcerrors"
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"github.com/moby/buildkit/util/tracing/detect"
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"github.com/sirupsen/logrus"
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"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
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"go.opentelemetry.io/otel/propagation"
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"go.opentelemetry.io/otel/trace"
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"golang.org/x/net/http2"
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"google.golang.org/grpc"
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)
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func init() {
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// enable in memory recording for grpc traces
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detect.Recorder = detect.NewTraceRecorder()
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}
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type grpcRouter struct {
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routes []router.Route
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grpcServer *grpc.Server
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h2Server *http2.Server
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}
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var propagators = propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{})
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// NewRouter initializes a new grpc http router
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func NewRouter(backends ...Backend) router.Router {
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tp, err := detect.TracerProvider()
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if err != nil {
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logrus.WithError(err).Error("failed to detect trace provider")
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}
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opts := []grpc.ServerOption{grpc.UnaryInterceptor(grpcerrors.UnaryServerInterceptor), grpc.StreamInterceptor(grpcerrors.StreamServerInterceptor)}
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if tp != nil {
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streamTracer := otelgrpc.StreamServerInterceptor(otelgrpc.WithTracerProvider(tp), otelgrpc.WithPropagators(propagators))
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unary := grpc_middleware.ChainUnaryServer(unaryInterceptor(tp), grpcerrors.UnaryServerInterceptor)
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stream := grpc_middleware.ChainStreamServer(streamTracer, grpcerrors.StreamServerInterceptor)
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opts = []grpc.ServerOption{grpc.UnaryInterceptor(unary), grpc.StreamInterceptor(stream)}
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}
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r := &grpcRouter{
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h2Server: &http2.Server{},
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grpcServer: grpc.NewServer(opts...),
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}
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for _, b := range backends {
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b.RegisterGRPC(r.grpcServer)
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}
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r.initRoutes()
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return r
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}
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// Routes returns the available routers to the session controller
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func (gr *grpcRouter) Routes() []router.Route {
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return gr.routes
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}
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func (gr *grpcRouter) initRoutes() {
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gr.routes = []router.Route{
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router.NewPostRoute("/grpc", gr.serveGRPC),
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}
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}
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func unaryInterceptor(tp trace.TracerProvider) grpc.UnaryServerInterceptor {
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withTrace := otelgrpc.UnaryServerInterceptor(otelgrpc.WithTracerProvider(tp), otelgrpc.WithPropagators(propagators))
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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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// This method is used by the clients to send their traces to buildkit so they can be included
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// in the daemon trace and stored in the build history record. This method can not be traced because
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// it would cause an infinite loop.
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if strings.HasSuffix(info.FullMethod, "opentelemetry.proto.collector.trace.v1.TraceService/Export") {
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return handler(ctx, req)
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}
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return withTrace(ctx, req, info, handler)
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}
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}
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