Data Collection and Reporting - docker/go-metrics

The “github.com/docker/go-metrics” module is used for collecting and reporting metrics in Go applications. It is based on the Prometheus Go client library and supports the OpenTelemetry Metrics API.

Here are some options for data collection and reporting using this module:

Prometheus Go client library: This is the primary method for collecting and reporting metrics using the “github.com/docker/go-metrics” module. It allows you to expose metrics via HTTP and configure Prometheus to scrape them. Here is an example of how to use the Prometheus Go client library with this module:

import (
"github.com/docker/go-metrics"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
)

func init() {
// Register the go-metrics metrics with the Prometheus registry
prometheus.MustRegister(metrics.DefaultMetrics...)
}

func main() {
http.Handle("/metrics", promhttp.Handler())
http.ListenAndServe(":8080", nil)
}

OpenTelemetry Metrics SDK: The “github.com/docker/go-metrics” module also supports the OpenTelemetry Metrics API, which allows you to use the OpenTelemetry Metrics SDK to collect and report metrics. Here is an example of how to use the OpenTelemetry Metrics SDK with this module:

import (
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/unit"
"github.com/docker/go-metrics"
)

func init() {
// Create a new OpenTelemetry metrics provider
provider := metric.NewMeterProvider()

// Register the go-metrics metrics with the OpenTelemetry provider
goMetrics, err := metrics.NewGoMetrics(provider, "my_service")
if err != nil {
// Handle error
}
goMetrics.Register()
}

func main() {
// Use the OpenTelemetry Metrics SDK to record and process metrics
}

Custom exporters: The “github.com/docker/go-metrics” module also allows you to write custom exporters for reporting metrics. This can be useful if you want to report metrics to a system other than Prometheus. Here is an example of how to write a custom exporter using this module:

import (
"github.com/docker/go-metrics"
)

type customExporter struct {
// fields for the custom exporter
}

func (e *customExporter) Export(metrics []*metrics.Metric) {
// Export the metrics to the custom system
}

func init() {
// Register the custom exporter with the go-metrics registry
metrics.Register("custom", &customExporter{})
}

func main() {
// Use the custom exporter to report metrics
}

Sources: