OpenTelemetry Go Configuration
Ship traces from Go to OpenSearch with OpenTelemetry
Use OpenTelemetry to easily send Go traces to your Logit.io Stack.
Install Integration
Getting Started
This guide uses the OpenTelemetry Go collector example (opens in a new tab) application as its starting point with some modifications to allow the traces to be sent to your Logit.io Stack.
This code is added to main.go
and when run will send the example traces to your Logit.io Stack to be viewed in Jaeger.
package main
import (
"context"
"encoding/base64"
"fmt"
"log"
"os"
"os/signal"
"time"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptrace@protocol"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
"go.opentelemetry.io/otel/trace"
)
// Initializes an OTLP exporter, and configures the corresponding trace and
// metric providers.
func initProvider() (func(context.Context) error, error) {
ctx := context.Background()
res, err := resource.New(ctx,
resource.WithAttributes(
// the service name used to display traces in backends
semconv.ServiceName("test-service"),
),
)
if err != nil {
return nil, fmt.Errorf("failed to create resource: %w", err)
}
ctx, cancel := context.WithTimeout(ctx, time.Second)
defer cancel()
creds := &basicAuthCreds{
username: "@opentelemetry.username",
password: "@opentelemetry.password",
}
headers, err := creds.GetRequestMetadata(ctx)
if err != nil {
log.Fatalf("failed to get request metadata: %v", err)
}
// Set up a trace exporter
traceExporter, err := otlptrace"@protocol:strip_quotes"
.New(ctx, otlptrace"@protocol:strip_quotes"
.WithEndpoint("@opentelemetry.endpointAddress:@port"),
otlptrace{{opentelemetry.protocol}}.WithHeaders(headers))
if err != nil {
return nil, fmt.Errorf("failed to create trace exporter: %w", err)
}
// Register the trace exporter with a TracerProvider, using a batch
// span processor to aggregate spans before export.
bsp := sdktrace.NewBatchSpanProcessor(traceExporter)
tracerProvider := sdktrace.NewTracerProvider(
sdktrace.WithSampler(sdktrace.AlwaysSample()),
sdktrace.WithResource(res),
sdktrace.WithSpanProcessor(bsp),
)
otel.SetTracerProvider(tracerProvider)
// set global propagator to tracecontext (the default is no-op).
otel.SetTextMapPropagator(propagation.TraceContext{})
// Shutdown will flush any remaining spans and shut down the exporter.
return tracerProvider.Shutdown, nil
}
func main() {
log.Printf("Waiting for connection...")
ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
defer cancel()
shutdown, err := initProvider()
if err != nil {
log.Fatal(err)
}
defer func() {
if err := shutdown(ctx); err != nil {
log.Fatal("failed to shutdown TracerProvider: %w", err)
}
}()
tracer := otel.Tracer("test-tracer")
// Attributes represent additional key-value descriptors that can be bound
// to a metric observer or recorder.
commonAttrs := []attribute.KeyValue{
attribute.String("attrA", "chocolate"),
attribute.String("attrB", "raspberry"),
attribute.String("attrC", "vanilla"),
}
// work begins
ctx, span := tracer.Start(
ctx,
"CollectorExporter-Example",
trace.WithAttributes(commonAttrs...))
defer span.End()
for i := 0; i < 10; i++ {
_, iSpan := tracer.Start(ctx, fmt.Sprintf("Sample-%d", i))
log.Printf("Doing really hard work (%d / 10)\n", i+1)
<-time.After(time.Second)
iSpan.End()
}
log.Printf("Done!")
}
type basicAuthCreds struct {
username, password string
}
func (c *basicAuthCreds) GetRequestMetadata(context.Context, ...string) (map[string]string, error) {
return map[string]string{
"authorization": "Basic " + base64.StdEncoding.EncodeToString([]byte(c.username+":"+c.password)),
}, nil
}
Launch Logit.io to view your traces
Data should now have been sent to your Stack.
View My DataIf you don't see take a look at How to diagnose no data in Stack below for how to diagnose common issues.
How to diagnose no data in Stack
If you don't see data appearing in your Stack after following the steps, visit the Help Centre guide for steps to diagnose no data appearing in your Stack or Chat to support now.