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69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
package opentelemetry
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import (
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"sync"
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"github.com/tal-tech/go-zero/core/logx"
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"github.com/tal-tech/go-zero/core/syncx"
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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/exporters/jaeger"
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"go.opentelemetry.io/otel/propagation"
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"go.opentelemetry.io/otel/sdk/resource"
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sdktrace "go.opentelemetry.io/otel/sdk/trace"
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semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
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)
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var (
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once sync.Once
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enabled syncx.AtomicBool
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)
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// Enabled returns if opentelemetry is enabled.
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func Enabled() bool {
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return enabled.True()
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}
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// StartAgent starts a opentelemetry agent.
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func StartAgent(c Config) {
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once.Do(func() {
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if len(c.Endpoint) == 0 {
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return
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}
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// Just support jaeger now
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if c.Batcher != "jaeger" {
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return
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}
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exp, err := jaeger.New(jaeger.WithCollectorEndpoint(jaeger.WithEndpoint(c.Endpoint)))
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if err != nil {
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logx.Error(err)
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return
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}
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tp := sdktrace.NewTracerProvider(
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// Set the sampling rate based on the parent span to 100%
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sdktrace.WithSampler(sdktrace.ParentBased(sdktrace.TraceIDRatioBased(c.Sampler))),
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// Always be sure to batch in production.
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sdktrace.WithBatcher(exp),
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// Record information about this application in an Resource.
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sdktrace.WithResource(resource.NewSchemaless(semconv.ServiceNameKey.String(c.Name))),
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)
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otel.SetTracerProvider(tp)
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otel.SetTextMapPropagator(propagation.NewCompositeTextMapPropagator(propagation.TraceContext{}, propagation.Baggage{}))
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otel.SetErrorHandler(otelErrHandler{})
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enabled.Set(true)
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})
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}
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// errHandler handing otel errors.
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type otelErrHandler struct{}
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var _ otel.ErrorHandler = otelErrHandler{}
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func (o otelErrHandler) Handle(err error) {
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logx.Errorf("[otel] error: %v", err)
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}
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