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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
//go:build go1.18
// +build go1.18
package main
import (
"context"
"log"
"os"
"os/signal"
"time"
"go.opentelemetry.io/contrib/instrumentation/host"
"go.opentelemetry.io/otel/exporters/stdout/stdoutmetric"
"go.opentelemetry.io/otel/sdk/metric"
"go.opentelemetry.io/otel/sdk/resource"
semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
)
var res = resource.NewWithAttributes(
semconv.SchemaURL,
semconv.ServiceName("host-instrumentation-example"),
)
func main() {
exp, err := stdoutmetric.New()
if err != nil {
log.Fatal(err)
}
// Register the exporter with an SDK via a periodic reader.
read := metric.NewPeriodicReader(exp, metric.WithInterval(1*time.Second))
provider := metric.NewMeterProvider(metric.WithResource(res), metric.WithReader(read))
defer func() {
err := provider.Shutdown(context.Background())
if err != nil {
log.Fatal(err)
}
}()
ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
defer cancel()
log.Print("Starting host instrumentation:")
err = host.Start(host.WithMeterProvider(provider))
if err != nil {
log.Fatal(err)
}
<-ctx.Done()
}
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