github.com/moby/docker@v26.1.3+incompatible/api/server/router/grpc/grpc.go (about)

     1  package grpc // import "github.com/docker/docker/api/server/router/grpc"
     2  
     3  import (
     4  	"context"
     5  	"strings"
     6  
     7  	"github.com/docker/docker/api/server/router"
     8  	grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
     9  	"github.com/moby/buildkit/util/grpcerrors"
    10  	"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
    11  	"golang.org/x/net/http2"
    12  	"google.golang.org/grpc"
    13  )
    14  
    15  type grpcRouter struct {
    16  	routes     []router.Route
    17  	grpcServer *grpc.Server
    18  	h2Server   *http2.Server
    19  }
    20  
    21  // NewRouter initializes a new grpc http router
    22  func NewRouter(backends ...Backend) router.Router {
    23  	unary := grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(unaryInterceptor(), grpcerrors.UnaryServerInterceptor))
    24  	stream := grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(otelgrpc.StreamServerInterceptor(), grpcerrors.StreamServerInterceptor)) //nolint:staticcheck // TODO(thaJeztah): ignore SA1019 for deprecated options: see https://github.com/moby/moby/issues/47437
    25  
    26  	r := &grpcRouter{
    27  		h2Server:   &http2.Server{},
    28  		grpcServer: grpc.NewServer(unary, stream),
    29  	}
    30  	for _, b := range backends {
    31  		b.RegisterGRPC(r.grpcServer)
    32  	}
    33  	r.initRoutes()
    34  	return r
    35  }
    36  
    37  // Routes returns the available routers to the session controller
    38  func (gr *grpcRouter) Routes() []router.Route {
    39  	return gr.routes
    40  }
    41  
    42  func (gr *grpcRouter) initRoutes() {
    43  	gr.routes = []router.Route{
    44  		router.NewPostRoute("/grpc", gr.serveGRPC),
    45  	}
    46  }
    47  
    48  func unaryInterceptor() grpc.UnaryServerInterceptor {
    49  	withTrace := otelgrpc.UnaryServerInterceptor() //nolint:staticcheck // TODO(thaJeztah): ignore SA1019 for deprecated options: see https://github.com/moby/moby/issues/47437
    50  
    51  	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
    52  		// This method is used by the clients to send their traces to buildkit so they can be included
    53  		// in the daemon trace and stored in the build history record. This method can not be traced because
    54  		// it would cause an infinite loop.
    55  		if strings.HasSuffix(info.FullMethod, "opentelemetry.proto.collector.trace.v1.TraceService/Export") {
    56  			return handler(ctx, req)
    57  		}
    58  		return withTrace(ctx, req, info, handler)
    59  	}
    60  }