feat: add well known for user lookup

internal/logz/init.go

@@ -3,6 +3,7 @@ package logz
 import (
 	"context"
 	"log"
+	"os"
 
 	"go.uber.org/multierr"
 )
@@ -31,3 +32,11 @@ func Init(ctx context.Context, name string) (context.Context, func() error) {
 		return multierr.Combine(errs...)
 	}
 }
+
+func env(name, defaultValue string) string {
+	if v := os.Getenv(name); v != "" {
+		log.Println("# ", name, " = ", v)
+		return v
+	}
+	return defaultValue
+}

internal/logz/metric.go

@@ -8,14 +8,12 @@ import (
 	"runtime/debug"
 	"time"
 
-	// metricsExporter "github.com/logzio/go-metrics-sdk"
 	"go.opentelemetry.io/contrib/instrumentation/runtime"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/exporters/prometheus"
 	"go.opentelemetry.io/otel/metric"
 	"go.opentelemetry.io/otel/metric/global"
 	"go.opentelemetry.io/otel/sdk/metric/aggregator/histogram"
-	"go.opentelemetry.io/otel/sdk/metric/controller/basic"
 	controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
 	"go.opentelemetry.io/otel/sdk/metric/export/aggregation"
 	processor "go.opentelemetry.io/otel/sdk/metric/processor/basic"
@@ -61,7 +59,7 @@ func initMetrics(ctx context.Context, name string) (context.Context, func() erro
 			aggregation.CumulativeTemporalitySelector(),
 			processor.WithMemory(true),
 		),
-		basic.WithResource(
+		controller.WithResource(
 			resource.NewWithAttributes(
 				semconv.SchemaURL,
 				attribute.String("app", name),

internal/logz/tracer.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"log"
 	"net/http"
-	"os"
 	"runtime"
 	"strconv"
 	"time"
@@ -54,6 +53,13 @@ func Span(ctx context.Context, opts ...trace.SpanStartOption) (context.Context,
 	return ctx, span
 }
 
+type SampleRate string
+
+const (
+	SampleAlways SampleRate = "always"
+	SampleNever  SampleRate = "never"
+)
+
 func initTracing(ctx context.Context, name string) (context.Context, func() error) {
 	res, err := resource.New(ctx,
 		resource.WithAttributes(
@@ -76,15 +82,15 @@ func initTracing(ctx context.Context, name string) (context.Context, func() erro
 	bsp := sdktrace.NewBatchSpanProcessor(traceExporter)
 
 	var sample sdktrace.TracerProviderOption
-	sampleRate := env("LOGZIO_TRACE_SAMPLE", "always")
+	sampleRate := SampleRate(env("EV_TRACE_SAMPLE", string(SampleNever)))
 	switch sampleRate {
 	case "always":
 		sample = sdktrace.WithSampler(sdktrace.AlwaysSample())
 	case "never":
 		sample = sdktrace.WithSampler(sdktrace.NeverSample())
 	default:
-		if v, err := strconv.Atoi(sampleRate); err != nil {
-			sample = sdktrace.WithSampler(sdktrace.AlwaysSample())
+		if v, err := strconv.Atoi(string(sampleRate)); err != nil {
+			sample = sdktrace.WithSampler(sdktrace.NeverSample())
 		} else {
 			sample = sdktrace.WithSampler(sdktrace.TraceIDRatioBased(float64(v) * 0.01))
 		}
@@ -122,13 +128,6 @@ func reverse[T any](s []T) {
 		last--
 	}
 }
-func env(name, defaultValue string) string {
-	if v := os.Getenv(name); v != "" {
-		log.Println("# ", name, " = ", v)
-		return v
-	}
-	return defaultValue
-}
 
 func Htrace(h http.Handler, name string) http.Handler {
 	return otelhttp.NewHandler(h, name)