d3015d63f2
- Create internal/common/otel.go with InitOTel() for tracing + metrics + logs - Add otelgin middleware for automatic Gin HTTP span creation - Add OTelEndpoint config (default: 192.168.1.154:4316) - Export all signals via OTLP gRPC to OTel Collector
105 lines
2.9 KiB
Go
105 lines
2.9 KiB
Go
package common
|
|
|
|
import (
|
|
"context"
|
|
"log"
|
|
"time"
|
|
|
|
"go.opentelemetry.io/otel"
|
|
"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
|
|
"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc"
|
|
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
|
|
"go.opentelemetry.io/otel/log/global"
|
|
"go.opentelemetry.io/otel/propagation"
|
|
sdklog "go.opentelemetry.io/otel/sdk/log"
|
|
sdkmetric "go.opentelemetry.io/otel/sdk/metric"
|
|
"go.opentelemetry.io/otel/sdk/resource"
|
|
sdktrace "go.opentelemetry.io/otel/sdk/trace"
|
|
semconv "go.opentelemetry.io/otel/semconv/v1.26.0"
|
|
)
|
|
|
|
// InitOTel initializes OpenTelemetry tracing, metrics, and logging providers.
|
|
// It returns a shutdown function that should be called on application exit.
|
|
func InitOTel(ctx context.Context, otelEndpoint string) (shutdown func(context.Context) error) {
|
|
res, err := resource.New(ctx,
|
|
resource.WithAttributes(
|
|
semconv.ServiceNameKey.String("file-system"),
|
|
semconv.ServiceVersionKey.String("1.0.0"),
|
|
),
|
|
)
|
|
if err != nil {
|
|
log.Printf("OTel resource creation failed: %v", err)
|
|
return func(ctx context.Context) error { return nil }
|
|
}
|
|
|
|
// Tracer provider
|
|
traceExp, err := otlptracegrpc.New(ctx,
|
|
otlptracegrpc.WithEndpoint(otelEndpoint),
|
|
otlptracegrpc.WithInsecure(),
|
|
)
|
|
if err != nil {
|
|
log.Printf("OTel trace exporter creation failed: %v", err)
|
|
} else {
|
|
tp := sdktrace.NewTracerProvider(
|
|
sdktrace.WithBatcher(traceExp),
|
|
sdktrace.WithResource(res),
|
|
)
|
|
otel.SetTracerProvider(tp)
|
|
}
|
|
|
|
// Meter provider
|
|
metricExp, err := otlpmetricgrpc.New(ctx,
|
|
otlpmetricgrpc.WithEndpoint(otelEndpoint),
|
|
otlpmetricgrpc.WithInsecure(),
|
|
)
|
|
if err != nil {
|
|
log.Printf("OTel metric exporter creation failed: %v", err)
|
|
} else {
|
|
mp := sdkmetric.NewMeterProvider(
|
|
sdkmetric.WithReader(sdkmetric.NewPeriodicReader(metricExp,
|
|
sdkmetric.WithInterval(30*time.Second))),
|
|
sdkmetric.WithResource(res),
|
|
)
|
|
otel.SetMeterProvider(mp)
|
|
}
|
|
|
|
// Logger provider
|
|
logExp, err := otlploggrpc.New(ctx,
|
|
otlploggrpc.WithEndpoint(otelEndpoint),
|
|
otlploggrpc.WithInsecure(),
|
|
)
|
|
if err != nil {
|
|
log.Printf("OTel log exporter creation failed: %v", err)
|
|
} else {
|
|
lp := sdklog.NewLoggerProvider(
|
|
sdklog.WithProcessor(sdklog.NewBatchProcessor(logExp)),
|
|
sdklog.WithResource(res),
|
|
)
|
|
global.SetLoggerProvider(lp)
|
|
}
|
|
|
|
otel.SetTextMapPropagator(propagation.NewCompositeTextMapPropagator(
|
|
propagation.TraceContext{},
|
|
propagation.Baggage{},
|
|
))
|
|
|
|
return func(ctx context.Context) error {
|
|
var errs []error
|
|
if tp, ok := otel.GetTracerProvider().(*sdktrace.TracerProvider); ok {
|
|
errs = append(errs, tp.Shutdown(ctx))
|
|
}
|
|
if mp, ok := otel.GetMeterProvider().(*sdkmetric.MeterProvider); ok {
|
|
errs = append(errs, mp.Shutdown(ctx))
|
|
}
|
|
if lp, ok := global.GetLoggerProvider().(*sdklog.LoggerProvider); ok {
|
|
errs = append(errs, lp.Shutdown(ctx))
|
|
}
|
|
for _, e := range errs {
|
|
if e != nil {
|
|
return e
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
}
|