kubernetes/vendor/go.etcd.io/etcd/server/v3/embed/config_tracing.go

const maxSamplingRatePerMillion …

func validateTracingConfig(samplingRate int) error { … }

type tracingExporter …

func newTracingExporter(ctx context.Context, cfg *Config) (*tracingExporter, error) { … }

func (te *tracingExporter) Close(ctx context.Context) { … }

func determineSampler(samplingRate int) tracesdk.Sampler { … }

// As Tracing service Instance ID must be unique, it should
// never use the empty default string value, it's set if
// if it's a non empty string.
func determineResourceWithIDKey(serviceInstanceID string) *resource.Resource { … }