trace

type Options struct {
	//  URL of zipkin collector (example: 'http://zipkin:9411/api/v1/spans').
	ZipkinURL string

	//  URL of jaeger HTTP collector (example: 'http://jaeger:14268/api/traces?format=jaeger.thrift').
	JaegerURL string

	//  Whether or not to emit trace spans as log records.
	LogTraceSpans bool

	//  SamplingRate controls the rate at which a process will decide to generate trace spans.
	SamplingRate float64
}