tracer

type Config struct {
	// ServiceName customize service name
	ServiceName string `yaml:"serviceName"`
	// EndPoint the jaeger endpoint
	EndPoint string `yaml:"endpoint"`
	// InstanceID MUST be unique for each instance of the same
	InstanceID string `yaml:"instanceID"`
	//SamplingRatio customize sampling ratio
	//ratio >= 1 will always sample (default),< 0 are treated as zero will no sample
	// if you set this to .5, half of traces will be sampled
	SamplingRatio string `yaml:"samplingRatio"`
}

type Option func(ops *optionParams) error