Go

Instrument your Go app using openTelemetry and export traces to Aspecto's collector.
​
Install OpenTelemetry SDK
go get go.opentelemetry.io/[email protected] \
go.opentelemetry.io/otel/[email protected] \
go.opentelemetry.io/otel/[email protected] \
go.opentelemetry.io/otel/sdk/resource \
go.opentelemetry.io/otel/propagation \
go.opentelemetry.io/otel/semconv/v1.4.0 \
go.opentelemetry.io/otel/exporters/otlp/otlptrace/[email protected]
Initialize OpenTelemetry
add to your main.go file the following imports
import (
	"go.opentelemetry.io/otel"
	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
	"go.opentelemetry.io/otel/propagation"
	"go.opentelemetry.io/otel/sdk/resource"
	sdktrace "go.opentelemetry.io/otel/sdk/trace"
	semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
)
and then in your main function add the following code
	ctx := context.Background()
	traceExporter, err := otlptracehttp.New(ctx,
		otlptracehttp.WithEndpoint("otelcol.aspecto.io"),
		otlptracehttp.WithHeaders(map[string]string{"Authorization": "<YOUR ASPECTO TOKEN HERE>"}))
​
	if err != nil {
		log.Fatal(err)
	}
​
	res, err := resource.New(ctx,
		resource.WithAttributes(
			semconv.ServiceNameKey.String("<YOUR SERVICE NAME>"),
		),
	)
​
	if err != nil {
		log.Fatal(err)
	}
​
	tp := sdktrace.NewTracerProvider(
		sdktrace.WithSampler(sdktrace.AlwaysSample()),
		sdktrace.WithResource(res),
		sdktrace.WithBatcher(traceExporter))
	otel.SetTracerProvider(tp)
	otel.SetTextMapPropagator(propagation.TraceContext{})
Auto Instrumentation
Go has support for a few popular libraries including net/http go-redis and mongo-driver
net/http
go get go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp
you will need to wrap each http handler with otelHandler see an example below
handler := func(w http.ResponseWriter, req *http.Request) {
	//your handler code
}
​
http.Handle("/hello", otelhttp.NewHandler(http.HandlerFunc(handler), "Handler"))
go-redis
go get github.com/go-redis/redis/extra/redisotel/v8
then add the following code to your redis client initialization code 
import (
    "github.com/go-redis/redis/v8"
    "github.com/go-redis/redis/extra/redisotel"
)
​
rdb := rdb.NewClient(&rdb.Options{...})
​
rdb.AddHook(redisotel.NewTracingHook())
mongo-driver
 go get go.opentelemetry.io/contrib/instrumentation/go.mongodb.org/mongo-driver/mongo/otelmongo
then add the following code to your mongo client initialization code 
	opts := options.Client()
	opts.Monitor = otelmongo.NewMonitor()
You can find the full list of instrumentations here​
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Last modified 1yr ago