forked from open-telemetry/opentelemetry-go-contrib
/
xrayconfig.go
89 lines (76 loc) · 3.21 KB
/
xrayconfig.go
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// Copyright The OpenTelemetry Authors
//
// 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 xrayconfig
import (
"context"
"log"
"os"
lambdadetector "go.opentelemetry.io/contrib/detectors/aws/lambda"
"go.opentelemetry.io/contrib/instrumentation/github.com/aws/aws-lambda-go/otellambda"
"go.opentelemetry.io/contrib/propagators/aws/xray"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
"go.opentelemetry.io/otel/propagation"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
)
var errorLogger = log.New(log.Writer(), "OTel Lambda XRay Configuration Error: ", 0)
func xrayEventToCarrier([]byte) propagation.TextMapCarrier {
xrayTraceID := os.Getenv("_X_AMZN_TRACE_ID")
return propagation.HeaderCarrier{"X-Amzn-Trace-Id": []string{xrayTraceID}}
}
// NewTracerProvider returns a TracerProvider configured with exporter,
// id generator and lambda resource detector to send trace data to AWS X-Ray via Collector
func NewTracerProvider(ctx context.Context) (*sdktrace.TracerProvider, error) {
exp, err := otlptracegrpc.New(ctx, otlptracegrpc.WithInsecure())
if err != nil {
errorLogger.Println("failed to create exporter: ", err)
return nil, err
}
detector := lambdadetector.NewResourceDetector()
resource, err := detector.Detect(ctx)
if err != nil {
errorLogger.Println("failed to detect lambda resources: ", err)
return nil, err
}
return sdktrace.NewTracerProvider(
sdktrace.WithBatcher(exp),
sdktrace.WithIDGenerator(xray.NewIDGenerator()),
sdktrace.WithResource(resource),
), nil
}
// TracerProvider returns an otellambda.Option(s) to
// enable using a TracerProvider configured for AWS XRay via a collector
func TracerProvider(tp *sdktrace.TracerProvider) otellambda.Option {
return otellambda.WithTracerProvider(tp)
}
// Flusher returns an otellambda.Option(s) to
// enable flushing any unexported spans during lambda invocation
func Flusher(tp *sdktrace.TracerProvider) otellambda.Option {
return otellambda.WithFlusher(tp)
}
// EventToCarrier returns an otellambda.Option to enable
// an otellambda.EventToCarrier function which reads the XRay trace
// information from the environment and returns this information in
// a propagation.HeaderCarrier
func EventToCarrier() otellambda.Option {
return otellambda.WithEventToCarrier(xrayEventToCarrier)
}
// Propagator returns an otellambda.Option to enable the xray.Propagator
func Propagator() otellambda.Option {
return otellambda.WithPropagator(xray.Propagator{})
}
// RecommendedOptions returns a list of all otellambda.Option(s)
// recommended for the otellambda package when using AWS XRay
func RecommendedOptions(tp *sdktrace.TracerProvider) []otellambda.Option {
return []otellambda.Option{EventToCarrier(), Propagator(), TracerProvider(tp), Flusher(tp)}
}