/
metrics.go
130 lines (111 loc) · 3.27 KB
/
metrics.go
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package internal
import (
"fmt"
"time"
"github.com/cactus/go-statsd-client/v5/statsd"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/collectors"
dto "github.com/prometheus/client_model/go"
"github.com/spf13/viper"
"github.com/wal-g/tracelog"
)
type metrics struct {
uploadedFilesTotal prometheus.Counter
uploadedFilesFailedTotal prometheus.Counter
}
var (
WalgMetricsPrefix = "walg_"
WalgMetrics = metrics{
uploadedFilesTotal: prometheus.NewCounter(
prometheus.CounterOpts{
Name: WalgMetricsPrefix + "uploader_uploaded_files_total",
Help: "Number of uploaded files.",
},
),
uploadedFilesFailedTotal: prometheus.NewCounter(
prometheus.CounterOpts{
Name: WalgMetricsPrefix + "uploader_uploaded_files_failed_total",
Help: "Number of file upload failures.",
},
),
}
)
func init() {
// unregister prometheus collectors
// https://github.com/prometheus/client_golang/blob/8dfa334295e85f9b1e48ce862fae5f337faa6d2f/prometheus/registry.go#L62-L63
prometheus.Unregister(collectors.NewProcessCollector(collectors.ProcessCollectorOpts{}))
prometheus.Unregister(collectors.NewGoCollector())
prometheus.MustRegister(WalgMetrics.uploadedFilesTotal)
prometheus.MustRegister(WalgMetrics.uploadedFilesFailedTotal)
}
func PushMetrics() {
address := viper.GetString(StatsdAddressSetting)
if address == "" {
return
}
err := pushMetrics(address)
if err != nil {
tracelog.WarningLogger.Printf("Pushing metrics failed: %v", err)
}
}
func pushMetrics(address string) error {
config := &statsd.ClientConfig{
Address: address,
UseBuffered: true,
FlushInterval: 10 * time.Second,
TagFormat: statsd.InfixComma,
}
client, err := statsd.NewClientWithConfig(config)
if err != nil {
return err
}
defer client.Close()
tracelog.DebugLogger.Printf("Sending metrics to statsd")
mfs, err := prometheus.DefaultGatherer.Gather()
if err != nil {
return err
}
for _, mf := range mfs {
if err := writeMetricFamilyToStatsd(client, mf); err != nil {
return err
}
}
return nil
}
func writeMetricFamilyToStatsd(client statsd.Statter, in *dto.MetricFamily) error {
name := in.GetName()
metricType := in.GetType()
for _, metric := range in.Metric {
var tags []statsd.Tag
for _, lp := range metric.Label {
tags = append(tags, statsd.Tag{lp.GetName(), lp.GetValue()})
}
switch metricType {
case dto.MetricType_COUNTER:
if metric.Counter == nil {
return fmt.Errorf("expected counter in metric %s %s", name, metric)
}
err := client.Inc(name, int64(metric.Counter.GetValue()), 1.0, tags...)
if err != nil {
return err
}
case dto.MetricType_GAUGE:
if metric.Gauge == nil {
return fmt.Errorf("expected gauge in metric %s %s", name, metric)
}
err := client.Gauge(name, int64(metric.Gauge.GetValue()), 1.0, tags...)
if err != nil {
return err
}
case dto.MetricType_UNTYPED:
return fmt.Errorf("expected untyped in metric %s %s", name, metric)
case dto.MetricType_SUMMARY:
return fmt.Errorf("expected summary in metric %s %s", name, metric)
case dto.MetricType_HISTOGRAM:
return fmt.Errorf("expected histogram in metric %s %s", name, metric)
default:
return fmt.Errorf("unexpected type in metric %s %s", name, metric)
}
}
return nil
}