otel

type BatchSpanProcessor struct {
	ScheduleDelay      time.Duration `yaml:"scheduleDelay"`
	ExportTimeout      time.Duration `yaml:"exportTimeout"`
	MaxQueueSize       int           `yaml:"maxQueueSize"`
	MaxExportBatchSize int           `yaml:"maxExportBatchSize"`
}

type ExporterOtlp struct {
	Protocol string            `yaml:"protocol"`
	Endpoint string            `yaml:"endpoint"`
	Headers  map[string]string `yaml:"headers"`
}

type Options struct {
	// Initialized indicates whether the OpenTelemetry pipeline has been initialized externally.
	// If true [Init] returns immediately without doing anything.
	Initialized bool `yaml:"-"`

	TracesExporter     string             `yaml:"tracesExporter"`
	ExporterOtlp       ExporterOtlp       `yaml:"exporterOtlp"`
	ResourceAttributes map[string]string  `yaml:"resourceAttributes"`
	Propagators        []string           `yaml:"propagators"`
	BatchSpanProcessor BatchSpanProcessor `yaml:"batchSpanProcessor"`

	// Sampler configures the Sampler used by the TracerProvider to decide
	// whether a span is recorded and marked as sampled.
	//
	// Supported values, matching the OTEL_TRACES_SAMPLER environment variable:
	//
	//   - always_on
	//   - always_off
	//   - traceidratio
	//   - parentbased_always_on (default)
	//   - parentbased_always_off
	//   - parentbased_traceidratio
	//
	// If empty, the sampler is taken from the OTEL_TRACES_SAMPLER (and
	// OTEL_TRACES_SAMPLER_ARG) environment variables, falling back to the SDK
	// default of parentbased_always_on if those are not set either.
	//
	// Note that "parentbased_*" samplers respect the sampled flag of an
	// incoming traceparent header and will stop sampling (and therefore stop
	// propagating sampled=1) for the rest of the trace once an upstream hop
	// marks it as not sampled. Use "always_on" to make skipper always record
	// and always propagate sampled=1 regardless of the incoming trace context.
	Sampler string `yaml:"sampler"`

	// SamplerArg configures the argument for the Sampler, if applicable.
	// Only used by the "traceidratio" and "parentbased_traceidratio" samplers,
	// where it is the sampling ratio in the range [0.0, 1.0].
	//
	// If empty, the argument is taken from the OTEL_TRACES_SAMPLER_ARG
	// environment variable.
	SamplerArg string `yaml:"samplerArg"`
}