99 lines
3.2 KiB
Go
99 lines
3.2 KiB
Go
// Copyright 2016-2018, Pulumi Corporation.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package rpcutil
|
|
|
|
import (
|
|
"context"
|
|
"strings"
|
|
|
|
"github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc"
|
|
opentracing "github.com/opentracing/opentracing-go"
|
|
"github.com/pulumi/pulumi/sdk/go/common/util/contract"
|
|
"google.golang.org/grpc"
|
|
"google.golang.org/grpc/metadata"
|
|
)
|
|
|
|
// metadataReaderWriter satisfies both the opentracing.TextMapReader and
|
|
// opentracing.TextMapWriter interfaces.
|
|
type metadataReaderWriter struct {
|
|
metadata.MD
|
|
}
|
|
|
|
func (w metadataReaderWriter) Set(key, val string) {
|
|
// The GRPC HPACK implementation rejects any uppercase keys here.
|
|
//
|
|
// As such, since the HTTP_HEADERS format is case-insensitive anyway, we
|
|
// blindly lowercase the key (which is guaranteed to work in the
|
|
// Inject/Extract sense per the OpenTracing spec).
|
|
key = strings.ToLower(key)
|
|
w.MD[key] = append(w.MD[key], val)
|
|
}
|
|
|
|
func (w metadataReaderWriter) ForeachKey(handler func(key, val string) error) error {
|
|
for k, vals := range w.MD {
|
|
for _, v := range vals {
|
|
if err := handler(k, v); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// OpenTracingServerInterceptor provides a default gRPC server interceptor for emitting tracing to the global
|
|
// OpenTracing tracer.
|
|
func OpenTracingServerInterceptor(parentSpan opentracing.Span) grpc.UnaryServerInterceptor {
|
|
tracingInterceptor := otgrpc.OpenTracingServerInterceptor(
|
|
// Use the globally installed tracer
|
|
opentracing.GlobalTracer(),
|
|
// Log full payloads along with trace spans
|
|
otgrpc.LogPayloads(),
|
|
)
|
|
if parentSpan == nil {
|
|
return tracingInterceptor
|
|
}
|
|
spanContext := parentSpan.Context()
|
|
return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo,
|
|
handler grpc.UnaryHandler) (interface{}, error) {
|
|
|
|
md, ok := metadata.FromIncomingContext(ctx)
|
|
if !ok {
|
|
md = metadata.New(nil)
|
|
}
|
|
carrier := metadataReaderWriter{md}
|
|
_, err := opentracing.GlobalTracer().Extract(opentracing.HTTPHeaders, carrier)
|
|
if err == opentracing.ErrSpanContextNotFound {
|
|
contract.IgnoreError(opentracing.GlobalTracer().Inject(spanContext, opentracing.HTTPHeaders, carrier))
|
|
}
|
|
return tracingInterceptor(ctx, req, info, handler)
|
|
}
|
|
|
|
}
|
|
|
|
// OpenTracingClientInterceptor provides a default gRPC client interceptor for emitting tracing to the global
|
|
// OpenTracing tracer.
|
|
func OpenTracingClientInterceptor() grpc.UnaryClientInterceptor {
|
|
return otgrpc.OpenTracingClientInterceptor(
|
|
// Use the globally installed tracer
|
|
opentracing.GlobalTracer(),
|
|
// Log full payloads along with trace spans
|
|
otgrpc.LogPayloads(),
|
|
// Do not trace calls to the empty method
|
|
otgrpc.IncludingSpans(func(_ opentracing.SpanContext, method string, _, _ interface{}) bool {
|
|
return method != ""
|
|
}))
|
|
}
|