Revert "New metric for total lines relayed"

Signed-off-by: Matthias Rampke <matthias@prometheus.io>

go.mod

@@ -6,7 +6,6 @@ require (
 	github.com/prometheus/client_golang v1.11.0
 	github.com/prometheus/client_model v0.2.0
 	github.com/prometheus/common v0.30.0
-	github.com/stvp/go-udp-testing v0.0.0-20201019212854-469649b16807
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
 	gopkg.in/yaml.v2 v2.4.0
 )

go.sum

@@ -190,8 +190,6 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stvp/go-udp-testing v0.0.0-20201019212854-469649b16807 h1:LUsDduamlucuNnWcaTbXQ6aLILFcLXADpOzeEH3U+OI=
-github.com/stvp/go-udp-testing v0.0.0-20201019212854-469649b16807/go.mod h1:7jxmlfBCDBXRzr0eAQJ48XC1hBu1np4CS5+cHEYfwpc=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=

pkg/relay/relay.go

@@ -20,8 +20,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/prometheus/statsd_exporter/pkg/clock"
-
 	"github.com/go-kit/log"
 
 	"github.com/prometheus/client_golang/prometheus"
@@ -36,9 +34,8 @@ type Relay struct {
 	logger        log.Logger
 	packetLength  uint
 
-	packetsTotal      prometheus.Counter
+	packetsTotal   prometheus.Counter
-	longLinesTotal    prometheus.Counter
+	longLinesTotal prometheus.Counter
-	relayedLinesTotal prometheus.Counter
 }
 
 var (
@@ -56,13 +53,6 @@ var (
 		},
 		[]string{"target"},
 	)
-	relayLinesRelayedTotal = promauto.NewCounterVec(
-		prometheus.CounterOpts{
-			Name: "statsd_exporter_relay_lines_relayed_total",
-			Help: "The number of lines that were buffered to be relayed.",
-		},
-		[]string{"target"},
-	)
 )
 
 // NewRelay creates a statsd UDP relay. It can be used to send copies of statsd raw
@@ -86,9 +76,8 @@ func NewRelay(l log.Logger, target string, packetLength uint) (*Relay, error) {
 		logger:        l,
 		packetLength:  packetLength,
 
-		packetsTotal:      relayPacketsTotal.WithLabelValues(target),
+		packetsTotal:   relayPacketsTotal.WithLabelValues(target),
-		longLinesTotal:    relayLongLinesTotal.WithLabelValues(target),
+		longLinesTotal: relayLongLinesTotal.WithLabelValues(target),
-		relayedLinesTotal: relayLinesRelayedTotal.WithLabelValues(target),
 	}
 
 	// Startup the UDP sender.
@@ -102,7 +91,7 @@ func (r *Relay) relayOutput() {
 	var buffer bytes.Buffer
 	var err error
 
-	relayInterval := clock.NewTicker(1 * time.Second)
+	relayInterval := time.NewTicker(1 * time.Second)
 	defer relayInterval.Stop()
 
 	for {
@@ -162,6 +151,5 @@ func (r *Relay) RelayLine(l string) {
 	if !strings.HasSuffix(l, "\n") {
 		l = l + "\n"
 	}
-	r.relayedLinesTotal.Inc()
 	r.bufferChannel <- []byte(l)
 }

pkg/relay/relay_test.go

@@ -1,154 +0,0 @@
-package relay
-
-import (
-	"fmt"
-	"testing"
-	"time"
-
-	"github.com/go-kit/log"
-	"github.com/prometheus/client_golang/prometheus"
-	dto "github.com/prometheus/client_model/go"
-	"github.com/prometheus/statsd_exporter/pkg/clock"
-	"github.com/stvp/go-udp-testing"
-)
-
-func TestRelay_RelayLine(t *testing.T) {
-	type args struct {
-		lines    []string
-		expected string
-	}
-
-	tests := []struct {
-		name string
-		args args
-	}{
-		{
-			name: "multiple lines",
-			args: args{
-				lines:    []string{"foo5:100|c|#tag1:bar,#tag2:baz", "foo2:200|c|#tag1:bar,#tag2:baz"},
-				expected: "foo5:100|c|#tag1:bar,#tag2:baz\n",
-			},
-		},
-	}
-
-	for _, tt := range tests {
-		udp.SetAddr(":1160")
-		t.Run(tt.name, func(t *testing.T) {
-			tickerCh := make(chan time.Time)
-			clock.ClockInstance = &clock.Clock{
-				TickerCh: tickerCh,
-			}
-			clock.ClockInstance.Instant = time.Unix(0, 0)
-
-			logger := log.NewNopLogger()
-			r, err := NewRelay(
-				logger,
-				"localhost:1160",
-				200,
-			)
-
-			if err != nil {
-				t.Errorf("Did not expect error while creating relay.")
-			}
-
-			udp.ShouldReceive(t, tt.args.expected, func() {
-				for _, line := range tt.args.lines {
-					r.RelayLine(line)
-				}
-				// Tick time forward to trigger a packet send.
-				clock.ClockInstance.Instant = time.Unix(1, 10)
-				clock.ClockInstance.TickerCh <- time.Unix(0, 0)
-			})
-
-			metrics, err := prometheus.DefaultGatherer.Gather()
-			if err != nil {
-				t.Fatalf("Cannot gather from DefaultGatherer: %v", err)
-			}
-
-			metricNames := map[string]float64{
-				"statsd_exporter_relay_long_lines_total":    0,
-				"statsd_exporter_relay_lines_relayed_total": float64(len(tt.args.lines)),
-			}
-			for metricName, expectedValue := range metricNames {
-				metric := getFloat64(metrics, metricName, prometheus.Labels{"target": "localhost:1160"})
-
-				if metric == nil {
-					t.Fatalf("Could not find time series with first label set for metric: %s", metricName)
-				}
-				if *metric != expectedValue {
-					t.Errorf("Expected metric %s to be %f, got %f", metricName, expectedValue, *metric)
-				}
-			}
-
-			prometheus.Unregister(relayLongLinesTotal)
-			prometheus.Unregister(relayLinesRelayedTotal)
-		})
-	}
-}
-
-// getFloat64 search for metric by name in array of MetricFamily and then search a value by labels.
-// Method returns a value or nil if metric is not found.
-func getFloat64(metrics []*dto.MetricFamily, name string, labels prometheus.Labels) *float64 {
-	var metricFamily *dto.MetricFamily
-	for _, m := range metrics {
-		if *m.Name == name {
-			metricFamily = m
-			break
-		}
-	}
-	if metricFamily == nil {
-		return nil
-	}
-
-	var metric *dto.Metric
-	labelStr := fmt.Sprintf("%v", labels)
-	for _, m := range metricFamily.Metric {
-		l := labelPairsAsLabels(m.GetLabel())
-		ls := fmt.Sprintf("%v", l)
-		if labelStr == ls {
-			metric = m
-			break
-		}
-	}
-	if metric == nil {
-		return nil
-	}
-
-	var value float64
-	if metric.Gauge != nil {
-		value = metric.Gauge.GetValue()
-		return &value
-	}
-	if metric.Counter != nil {
-		value = metric.Counter.GetValue()
-		return &value
-	}
-	if metric.Histogram != nil {
-		value = metric.Histogram.GetSampleSum()
-		return &value
-	}
-	if metric.Summary != nil {
-		value = metric.Summary.GetSampleSum()
-		return &value
-	}
-	if metric.Untyped != nil {
-		value = metric.Untyped.GetValue()
-		return &value
-	}
-	panic(fmt.Errorf("collected a non-gauge/counter/histogram/summary/untyped metric: %s", metric))
-}
-
-func labelPairsAsLabels(pairs []*dto.LabelPair) (labels prometheus.Labels) {
-	labels = prometheus.Labels{}
-	for _, pair := range pairs {
-		if pair.Name == nil {
-			continue
-		}
-		value := ""
-		if pair.Value != nil {
-			value = *pair.Value
-		}
-		labels[*pair.Name] = value
-	}
-	return
-}