mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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5568a30723
* Add semconv/v1.12.0 * Update all semconv use to v1.12.0 Co-authored-by: Aaron Clawson <3766680+MadVikingGod@users.noreply.github.com>
133 lines
4.1 KiB
Go
133 lines
4.1 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Example using OTLP exporters + collector + third-party backends. For
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// information about using the exporter, see:
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// https://pkg.go.dev/go.opentelemetry.io/otel/exporters/otlp?tab=doc#example-package-Insecure
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package main
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import (
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"context"
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"fmt"
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"log"
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"os"
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"os/signal"
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"time"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
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"go.opentelemetry.io/otel/propagation"
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"go.opentelemetry.io/otel/sdk/resource"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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semconv "go.opentelemetry.io/otel/semconv/v1.12.0"
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"go.opentelemetry.io/otel/trace"
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)
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// Initializes an OTLP exporter, and configures the corresponding trace and
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// metric providers.
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func initProvider() (func(context.Context) error, error) {
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ctx := context.Background()
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res, err := resource.New(ctx,
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resource.WithAttributes(
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// the service name used to display traces in backends
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semconv.ServiceNameKey.String("test-service"),
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),
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)
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if err != nil {
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return nil, fmt.Errorf("failed to create resource: %w", err)
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}
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// If the OpenTelemetry Collector is running on a local cluster (minikube or
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// microk8s), it should be accessible through the NodePort service at the
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// `localhost:30080` endpoint. Otherwise, replace `localhost` with the
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// endpoint of your cluster. If you run the app inside k8s, then you can
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// probably connect directly to the service through dns
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ctx, cancel := context.WithTimeout(ctx, time.Second)
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defer cancel()
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conn, err := grpc.DialContext(ctx, "localhost:30080", grpc.WithTransportCredentials(insecure.NewCredentials()), grpc.WithBlock())
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if err != nil {
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return nil, fmt.Errorf("failed to create gRPC connection to collector: %w", err)
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}
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// Set up a trace exporter
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traceExporter, err := otlptracegrpc.New(ctx, otlptracegrpc.WithGRPCConn(conn))
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if err != nil {
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return nil, fmt.Errorf("failed to create trace exporter: %w", err)
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}
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// Register the trace exporter with a TracerProvider, using a batch
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// span processor to aggregate spans before export.
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bsp := sdktrace.NewBatchSpanProcessor(traceExporter)
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tracerProvider := sdktrace.NewTracerProvider(
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sdktrace.WithSampler(sdktrace.AlwaysSample()),
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sdktrace.WithResource(res),
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sdktrace.WithSpanProcessor(bsp),
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)
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otel.SetTracerProvider(tracerProvider)
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// set global propagator to tracecontext (the default is no-op).
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otel.SetTextMapPropagator(propagation.TraceContext{})
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// Shutdown will flush any remaining spans and shut down the exporter.
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return tracerProvider.Shutdown, nil
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}
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func main() {
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log.Printf("Waiting for connection...")
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ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
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defer cancel()
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shutdown, err := initProvider()
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if err != nil {
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log.Fatal(err)
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}
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defer func() {
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if err := shutdown(ctx); err != nil {
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log.Fatal("failed to shutdown TracerProvider: %w", err)
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}
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}()
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tracer := otel.Tracer("test-tracer")
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// Attributes represent additional key-value descriptors that can be bound
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// to a metric observer or recorder.
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commonAttrs := []attribute.KeyValue{
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attribute.String("attrA", "chocolate"),
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attribute.String("attrB", "raspberry"),
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attribute.String("attrC", "vanilla"),
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}
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// work begins
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ctx, span := tracer.Start(
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ctx,
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"CollectorExporter-Example",
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trace.WithAttributes(commonAttrs...))
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defer span.End()
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for i := 0; i < 10; i++ {
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_, iSpan := tracer.Start(ctx, fmt.Sprintf("Sample-%d", i))
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log.Printf("Doing really hard work (%d / 10)\n", i+1)
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<-time.After(time.Second)
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iSpan.End()
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}
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log.Printf("Done!")
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}
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