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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package config // import "go.opentelemetry.io/contrib/config"
import (
"context"
"errors"
"fmt"
"net/url"
"time"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
"go.opentelemetry.io/otel/trace"
"go.opentelemetry.io/otel/trace/noop"
)
func tracerProvider(cfg configOptions, res *resource.Resource) (trace.TracerProvider, shutdownFunc, error) {
if cfg.opentelemetryConfig.TracerProvider == nil {
return noop.NewTracerProvider(), noopShutdown, nil
}
opts := []sdktrace.TracerProviderOption{
sdktrace.WithResource(res),
}
var errs []error
for _, processor := range cfg.opentelemetryConfig.TracerProvider.Processors {
sp, err := spanProcessor(cfg.ctx, processor)
if err == nil {
opts = append(opts, sdktrace.WithSpanProcessor(sp))
} else {
errs = append(errs, err)
}
}
if len(errs) > 0 {
return noop.NewTracerProvider(), noopShutdown, errors.Join(errs...)
}
tp := sdktrace.NewTracerProvider(opts...)
return tp, tp.Shutdown, nil
}
func spanExporter(ctx context.Context, exporter SpanExporter) (sdktrace.SpanExporter, error) {
if exporter.Console != nil && exporter.OTLP != nil {
return nil, errors.New("must not specify multiple exporters")
}
if exporter.Console != nil {
return stdouttrace.New(
stdouttrace.WithPrettyPrint(),
)
}
if exporter.OTLP != nil && exporter.OTLP.Protocol != nil {
switch *exporter.OTLP.Protocol {
case protocolProtobufHTTP:
return otlpHTTPSpanExporter(ctx, exporter.OTLP)
case protocolProtobufGRPC:
return otlpGRPCSpanExporter(ctx, exporter.OTLP)
default:
return nil, fmt.Errorf("unsupported protocol %q", *exporter.OTLP.Protocol)
}
}
return nil, errors.New("no valid span exporter")
}
func spanProcessor(ctx context.Context, processor SpanProcessor) (sdktrace.SpanProcessor, error) {
if processor.Batch != nil && processor.Simple != nil {
return nil, errors.New("must not specify multiple span processor type")
}
if processor.Batch != nil {
exp, err := spanExporter(ctx, processor.Batch.Exporter)
if err != nil {
return nil, err
}
return batchSpanProcessor(processor.Batch, exp)
}
if processor.Simple != nil {
exp, err := spanExporter(ctx, processor.Simple.Exporter)
if err != nil {
return nil, err
}
return sdktrace.NewSimpleSpanProcessor(exp), nil
}
return nil, fmt.Errorf("unsupported span processor type, must be one of simple or batch")
}
func otlpGRPCSpanExporter(ctx context.Context, otlpConfig *OTLP) (sdktrace.SpanExporter, error) {
var opts []otlptracegrpc.Option
if otlpConfig.Endpoint != nil {
u, err := url.ParseRequestURI(*otlpConfig.Endpoint)
if err != nil {
return nil, err
}
// ParseRequestURI leaves the Host field empty when no
// scheme is specified (i.e. localhost:4317). This check is
// here to support the case where a user may not specify a
// scheme. The code does its best effort here by using
// otlpConfig.Endpoint as-is in that case.
if u.Host != "" {
opts = append(opts, otlptracegrpc.WithEndpoint(u.Host))
} else {
opts = append(opts, otlptracegrpc.WithEndpoint(*otlpConfig.Endpoint))
}
if u.Scheme == "http" {
opts = append(opts, otlptracegrpc.WithInsecure())
}
}
if otlpConfig.Compression != nil {
switch *otlpConfig.Compression {
case compressionGzip:
opts = append(opts, otlptracegrpc.WithCompressor(*otlpConfig.Compression))
case compressionNone:
// none requires no options
default:
return nil, fmt.Errorf("unsupported compression %q", *otlpConfig.Compression)
}
}
if otlpConfig.Timeout != nil && *otlpConfig.Timeout > 0 {
opts = append(opts, otlptracegrpc.WithTimeout(time.Millisecond*time.Duration(*otlpConfig.Timeout)))
}
if len(otlpConfig.Headers) > 0 {
opts = append(opts, otlptracegrpc.WithHeaders(toStringMap(otlpConfig.Headers)))
}
return otlptracegrpc.New(ctx, opts...)
}
func otlpHTTPSpanExporter(ctx context.Context, otlpConfig *OTLP) (sdktrace.SpanExporter, error) {
var opts []otlptracehttp.Option
if otlpConfig.Endpoint != nil {
u, err := url.ParseRequestURI(*otlpConfig.Endpoint)
if err != nil {
return nil, err
}
opts = append(opts, otlptracehttp.WithEndpoint(u.Host))
if u.Scheme == "http" {
opts = append(opts, otlptracehttp.WithInsecure())
}
if len(u.Path) > 0 {
opts = append(opts, otlptracehttp.WithURLPath(u.Path))
}
}
if otlpConfig.Compression != nil {
switch *otlpConfig.Compression {
case compressionGzip:
opts = append(opts, otlptracehttp.WithCompression(otlptracehttp.GzipCompression))
case compressionNone:
opts = append(opts, otlptracehttp.WithCompression(otlptracehttp.NoCompression))
default:
return nil, fmt.Errorf("unsupported compression %q", *otlpConfig.Compression)
}
}
if otlpConfig.Timeout != nil && *otlpConfig.Timeout > 0 {
opts = append(opts, otlptracehttp.WithTimeout(time.Millisecond*time.Duration(*otlpConfig.Timeout)))
}
if len(otlpConfig.Headers) > 0 {
opts = append(opts, otlptracehttp.WithHeaders(toStringMap(otlpConfig.Headers)))
}
return otlptracehttp.New(ctx, opts...)
}
func batchSpanProcessor(bsp *BatchSpanProcessor, exp sdktrace.SpanExporter) (sdktrace.SpanProcessor, error) {
var opts []sdktrace.BatchSpanProcessorOption
if bsp.ExportTimeout != nil {
if *bsp.ExportTimeout < 0 {
return nil, fmt.Errorf("invalid export timeout %d", *bsp.ExportTimeout)
}
opts = append(opts, sdktrace.WithExportTimeout(time.Millisecond*time.Duration(*bsp.ExportTimeout)))
}
if bsp.MaxExportBatchSize != nil {
if *bsp.MaxExportBatchSize < 0 {
return nil, fmt.Errorf("invalid batch size %d", *bsp.MaxExportBatchSize)
}
opts = append(opts, sdktrace.WithMaxExportBatchSize(*bsp.MaxExportBatchSize))
}
if bsp.MaxQueueSize != nil {
if *bsp.MaxQueueSize < 0 {
return nil, fmt.Errorf("invalid queue size %d", *bsp.MaxQueueSize)
}
opts = append(opts, sdktrace.WithMaxQueueSize(*bsp.MaxQueueSize))
}
if bsp.ScheduleDelay != nil {
if *bsp.ScheduleDelay < 0 {
return nil, fmt.Errorf("invalid schedule delay %d", *bsp.ScheduleDelay)
}
opts = append(opts, sdktrace.WithBatchTimeout(time.Millisecond*time.Duration(*bsp.ScheduleDelay)))
}
return sdktrace.NewBatchSpanProcessor(exp, opts...), nil
}
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