expose sampling radio settings for tracing

[dmaoxiang]

gf v2.5.6 链路追踪 怎么设置采样比例， 全量上报数据量太大了

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gf v2.5.6 link tracking How to set the sampling ratio? The amount of data reported in full is too large

[houseme]

需要自己初始化的时候设置

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Set when you need to initialize it yourself

[weimx2023]

@dmaoxiang @houseme I see this function for setting the sampling ratio, which is currently written as standard sampling (100%) in the code.

	tracerProvider := sdktrace.NewTracerProvider(
		sdktrace.WithSampler(sdktrace.AlwaysSample()),//this config the sampling ratio
		sdktrace.WithResource(res),
		sdktrace.WithSpanProcessor(bsp),
	)

Could we open up some configuration parameters for users to set? Otherwise, we'll have to rewrite this function ourselves.

    samplingRatio := 0.1

    tracerProvider := sdktrace.NewTracerProvider(
        sdktrace.WithSampler(sdktrace.TraceIDRatioBased(samplingRatio)),//set the sampling ratio to 10%
        sdktrace.WithResource(res),
        sdktrace.WithSpanProcessor(bsp),
    )

[gqcn]

@dmaoxiang @houseme I see this function for setting the sampling ratio, which is currently written as standard sampling (100%) in the code.

	tracerProvider := sdktrace.NewTracerProvider(
		sdktrace.WithSampler(sdktrace.AlwaysSample()),//this config the sampling ratio
		sdktrace.WithResource(res),
		sdktrace.WithSpanProcessor(bsp),
	)

Could we open up some configuration parameters for users to set? Otherwise, we'll have to rewrite this function ourselves.

    samplingRatio := 0.1

    tracerProvider := sdktrace.NewTracerProvider(
        sdktrace.WithSampler(sdktrace.TraceIDRatioBased(samplingRatio)),//set the sampling ratio to 10%
        sdktrace.WithResource(res),
        sdktrace.WithSpanProcessor(bsp),
    )

@houseme 我看了下咱们提供的contrib/trace/otlphttp&otlpgrpc没有开放TraceProvider的参数配置，封装得比较死，是否可以考虑在初始化的时候公开一下参数设置？例如像metric那样增加Option的选项

gf/contrib/metric/otelmetric/otelmetric.go

Line 15 in d4fa2c8

func NewProvider(option ...Option) (gmetric.Provider, error) {

这个Option可以直接使用OpenTelemetry的Option不需要自己再转换一下With*方法。

[houseme]

@dmaoxiang @houseme I see this function for setting the sampling ratio, which is currently written as standard sampling (100%) in the code.我看到这个函数用于设置采样率，目前在代码中写为标准采样（100%）。

	tracerProvider := sdktrace.NewTracerProvider(
		sdktrace.WithSampler(sdktrace.AlwaysSample()),//this config the sampling ratio
		sdktrace.WithResource(res),
		sdktrace.WithSpanProcessor(bsp),
	)

Could we open up some configuration parameters for users to set? Otherwise, we'll have to rewrite this function ourselves.能否开放一些配置参数供用户设置？否则，我们就必须自己重写这个函数。

    samplingRatio := 0.1

    tracerProvider := sdktrace.NewTracerProvider(
        sdktrace.WithSampler(sdktrace.TraceIDRatioBased(samplingRatio)),//set the sampling ratio to 10%
        sdktrace.WithResource(res),
        sdktrace.WithSpanProcessor(bsp),
    )

@houseme 我看了下咱们提供的contrib/trace/otlphttp&otlpgrpc没有开放TraceProvider的参数配置，封装得比较死，是否可以考虑在初始化的时候公开一下参数设置？例如像metric那样增加Option的选项

gf/contrib/metric/otelmetric/otelmetric.go

Line 15 in d4fa2c8

func NewProvider(option ...Option) (gmetric.Provider, error) {

这个Option可以直接使用OpenTelemetry的Option不需要自己再转换一下With*方法。

咱们改造 使用option的形式