metrics

README

go-metrics to OpenTelemetry adapter

Sarama (any most probably other projects) rely on the http://github.com/rcrowley/go-metrics package, numerous connectors exist for the package, however there seem to be no opentelemetry one.

Given the package only supports periodic scraping, it's better to wrap the metric types of go-metrics so that we can send the raw events to OpenTelemetry. The existing event interface of go-metrics is quite limited compared to OpenTelemetry esp considering the usage in Sarama lib, so right now:

• Context is context.Background() for OpenTelemetry calls
• Errors for metric registration is only logged

Documentation

Index

• func NewRegistry(opts NewRegistryOptions) (metrics.Registry, error)
• type ErrorHandler
  • func LoggingErrorHandler(dest *slog.Logger) ErrorHandler
• type NewRegistryOptions
• type TransformMetricsNameToOtel
  • func MetricAddNamePrefix(prefix string) TransformMetricsNameToOtel

Functions

func NewRegistry

func NewRegistry(opts NewRegistryOptions) (metrics.Registry, error)

Types

type ErrorHandler

type ErrorHandler func(error)

func LoggingErrorHandler

func LoggingErrorHandler(dest *slog.Logger) ErrorHandler

type NewRegistryOptions

type NewRegistryOptions struct {
	MetricMeter     otelmetric.Meter
	NameTransformFn TransformMetricsNameToOtel
	ErrorHandler    ErrorHandler
}

type TransformMetricsNameToOtel

type TransformMetricsNameToOtel func(string) string

func MetricAddNamePrefix

func MetricAddNamePrefix(prefix string) TransformMetricsNameToOtel