trace

func ContextWithSpan ¶

func ContextWithSpan(c *gin.Context) (ctx context.Context, ok bool)

ContextWithSpan 返回context

func ExtraTraceID ¶

func ExtraTraceID(ctx context.Context, key string) string

func Init ¶

func Init(sf int, svcName, addr string)

func NewTracer ¶

func NewTracer(servicename string, addr string) (opentracing.Tracer, io.Closer, error)

NewTracer 创建一个jaeger Tracer

func SetSamplingFrequency ¶

func SetSamplingFrequency(n int)

采样频率

func TracerWrapper ¶

func TracerWrapper(c *gin.Context)

包装context，添加 trace_id