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jaeger.go
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/
jaeger.go
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package jaeger
import (
"io"
"github.com/crazybber/micro/v3/service/logger"
"github.com/crazybber/micro/v3/util/opentelemetry"
"github.com/opentracing/opentracing-go"
"github.com/uber/jaeger-client-go/config"
)
const (
DefaultReporterAddress = "localhost:6831"
)
// New returns a configured Jaeger tracer:
func New(opts ...opentelemetry.Option) (opentracing.Tracer, io.Closer, error) {
options := opentelemetry.DefaultOptions()
for _, o := range opts {
o(&options)
}
logger.Debug("Creating a new Jaeger tracer")
// Prepare a Jaeger config using our options:
jaegerConfig := config.Configuration{
ServiceName: options.ServiceName,
Sampler: &config.SamplerConfig{
Type: "const", // No adaptive sampling or external lookups
Param: options.SamplingRate,
},
Reporter: &config.ReporterConfig{
LocalAgentHostPort: options.TraceReporterAddress,
},
}
// Prepare a new Jaeger tracer from this config:
tracer, closer, err := jaegerConfig.NewTracer()
if err != nil {
return nil, nil, err
}
return tracer, closer, nil
}