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statsd_exporter/bridge_test.go
SuperQ e3378f8027
Update exporter-toolkit 
* Update Go to 1.23.
* Replace go-kit/log with slog.

Signed-off-by: SuperQ <superq@gmail.com>
2024-10-11 09:35:20 +02:00

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// Copyright 2013 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"fmt"
"log/slog"
"net"
"reflect"
"testing"
"time"
"github.com/prometheus/client_golang/prometheus"
dto "github.com/prometheus/client_model/go"
"github.com/prometheus/common/promslog"
"github.com/prometheus/statsd_exporter/pkg/clock"
"github.com/prometheus/statsd_exporter/pkg/event"
"github.com/prometheus/statsd_exporter/pkg/exporter"
"github.com/prometheus/statsd_exporter/pkg/line"
"github.com/prometheus/statsd_exporter/pkg/listener"
"github.com/prometheus/statsd_exporter/pkg/mapper"
)
func TestHandlePacket(t *testing.T) {
scenarios := []struct {
name string
in string
out event.Events
}{
{
name: "empty",
}, {
name: "simple counter",
in: "foo:2|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 2,
CLabels: map[string]string{},
},
},
}, {
name: "simple gauge",
in: "foo:3|g",
out: event.Events{
&event.GaugeEvent{
GMetricName: "foo",
GValue: 3,
GLabels: map[string]string{},
},
},
}, {
name: "gauge with sampling",
in: "foo:3|g|@0.2",
out: event.Events{
&event.GaugeEvent{
GMetricName: "foo",
GValue: 3,
GLabels: map[string]string{},
},
},
}, {
name: "gauge decrement",
in: "foo:-10|g",
out: event.Events{
&event.GaugeEvent{
GMetricName: "foo",
GValue: -10,
GRelative: true,
GLabels: map[string]string{},
},
},
}, {
name: "gauge increment",
in: "foo:+10|g",
out: event.Events{
&event.GaugeEvent{
GMetricName: "foo",
GValue: 10,
GRelative: true,
GLabels: map[string]string{},
},
},
}, {
name: "gauge set negative",
in: "foo:0|g\nfoo:-1|g",
out: event.Events{
&event.GaugeEvent{
GMetricName: "foo",
GValue: 0,
GRelative: false,
GLabels: map[string]string{},
},
&event.GaugeEvent{
GMetricName: "foo",
GValue: -1,
GRelative: true,
GLabels: map[string]string{},
},
},
}, {
// Test the sequence given here https://github.com/statsd/statsd/blob/master/docs/metric_types.md#gauges
name: "gauge up and down",
in: "gaugor:333|g\ngaugor:-10|g\ngaugor:+4|g",
out: event.Events{
&event.GaugeEvent{
GMetricName: "gaugor",
GValue: 333,
GRelative: false,
GLabels: map[string]string{},
},
&event.GaugeEvent{
GMetricName: "gaugor",
GValue: -10,
GRelative: true,
GLabels: map[string]string{},
},
&event.GaugeEvent{
GMetricName: "gaugor",
GValue: 4,
GRelative: true,
GLabels: map[string]string{},
},
},
}, {
name: "simple timer",
in: "foo:200|ms",
out: event.Events{
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.2,
OLabels: map[string]string{},
},
},
}, {
name: "simple histogram",
in: "foo:200|h",
out: event.Events{
&event.ObserverEvent{
OMetricName: "foo",
OValue: 200,
OLabels: map[string]string{},
},
},
}, {
name: "simple distribution",
in: "foo:200|d",
out: event.Events{
&event.ObserverEvent{
OMetricName: "foo",
OValue: 200,
OLabels: map[string]string{},
},
},
}, {
name: "distribution with sampling",
in: "foo:0.01|d|@0.2|#tag1:bar,#tag2:baz",
out: event.Events{
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.01,
OLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.01,
OLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.01,
OLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.01,
OLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.01,
OLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
},
}, {
name: "librato tag extension",
in: "foo#tag1=bar,tag2=baz:100|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 100,
CLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
},
}, {
name: "librato tag extension with tag keys unsupported by prometheus",
in: "foo#09digits=0,tag.with.dots=1:100|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 100,
CLabels: map[string]string{"_09digits": "0", "tag_with_dots": "1"},
},
},
}, {
name: "influxdb tag extension",
in: "foo,tag1=bar,tag2=baz:100|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 100,
CLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
},
}, {
name: "SignalFx tag extension",
in: "foo.[tag1=bar,tag2=baz]test:100|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo.test",
CValue: 100,
CLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
},
}, {
name: "SignalFx tag extension, tags at end of name",
in: "foo.test[tag1=bar,tag2=baz]:100|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo.test",
CValue: 100,
CLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
},
}, {
name: "SignalFx tag extension, tags at beginning of name",
in: "[tag1=bar,tag2=baz]foo.test:100|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo.test",
CValue: 100,
CLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
},
}, {
name: "SignalFx tag extension, no tags",
in: "foo.[]test:100|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo.test",
CValue: 100,
CLabels: map[string]string{},
},
},
}, {
name: "SignalFx tag extension, non-kv tags",
in: "foo.[tag1,tag2]test:100|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo.test",
CValue: 100,
CLabels: map[string]string{},
},
},
}, {
name: "SignalFx tag extension, missing closing bracket",
in: "[tag1=bar,tag2=bazfoo.test:100|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "[tag1=bar,tag2=bazfoo.test",
CValue: 100,
CLabels: map[string]string{},
},
},
}, {
name: "SignalFx tag extension, missing opening bracket",
in: "tag1=bar,tag2=baz]foo.test:100|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "tag1=bar,tag2=baz]foo.test",
CValue: 100,
CLabels: map[string]string{},
},
},
}, {
name: "influxdb tag extension with tag keys unsupported by prometheus",
in: "foo,09digits=0,tag.with.dots=1:100|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 100,
CLabels: map[string]string{"_09digits": "0", "tag_with_dots": "1"},
},
},
}, {
name: "datadog tag extension",
in: "foo:100|c|#tag1:bar,tag2:baz",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 100,
CLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
},
}, {
name: "datadog tag extension with # in all keys (as sent by datadog php client)",
in: "foo:100|c|#tag1:bar,#tag2:baz",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 100,
CLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
},
}, {
name: "datadog tag extension with tag keys unsupported by prometheus",
in: "foo:100|c|#09digits:0,tag.with.dots:1",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 100,
CLabels: map[string]string{"_09digits": "0", "tag_with_dots": "1"},
},
},
}, {
name: "datadog tag extension with valueless tags: ignored",
in: "foo:100|c|#tag_without_a_value",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 100,
CLabels: map[string]string{},
},
},
}, {
name: "datadog tag extension with valueless tags (edge case)",
in: "foo:100|c|#tag_without_a_value,tag:value",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 100,
CLabels: map[string]string{"tag": "value"},
},
},
}, {
name: "datadog tag extension with empty tags (edge case)",
in: "foo:100|c|#tag:value,,",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 100,
CLabels: map[string]string{"tag": "value"},
},
},
}, {
name: "datadog tag extension with sampling",
in: "foo:100|c|@0.1|#tag1:bar,#tag2:baz",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 1000,
CLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
},
}, {
name: "librato/dogstatsd mixed tag styles without sampling",
in: "foo#tag1=foo,tag3=bing:100|c|#tag1:bar,#tag2:baz",
out: event.Events{},
}, {
name: "signalfx/dogstatsd mixed tag styles without sampling",
in: "foo[tag1=foo,tag3=bing]:100|c|#tag1:bar,#tag2:baz",
out: event.Events{},
}, {
name: "influxdb/dogstatsd mixed tag styles without sampling",
in: "foo,tag1=foo,tag3=bing:100|c|#tag1:bar,#tag2:baz",
out: event.Events{},
}, {
name: "mixed tag styles with sampling",
in: "foo#tag1=foo,tag3=bing:100|c|@0.1|#tag1:bar,#tag2:baz",
out: event.Events{},
}, {
name: "histogram with sampling",
in: "foo:0.01|h|@0.2|#tag1:bar,#tag2:baz",
out: event.Events{
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.01,
OLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.01,
OLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.01,
OLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.01,
OLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.01,
OLabels: map[string]string{"tag1": "bar", "tag2": "baz"},
},
},
}, {
name: "datadog tag extension with multiple colons",
in: "foo:100|c|@0.1|#tag1:foo:bar",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 1000,
CLabels: map[string]string{"tag1": "foo:bar"},
},
},
}, {
name: "datadog tag extension with invalid utf8 tag values",
in: "foo:100|c|@0.1|#tag:\xc3\x28invalid",
}, {
name: "datadog tag extension with both valid and invalid utf8 tag values",
in: "foo:100|c|@0.1|#tag1:valid,tag2:\xc3\x28invalid",
}, {
name: "multiple metrics with invalid datadog utf8 tag values",
in: "foo:200|c|#tag:value\nfoo:300|c|#tag:\xc3\x28invalid",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 200,
CLabels: map[string]string{"tag": "value"},
},
},
}, {
name: "combined multiline metrics",
in: "foo:200|ms:300|ms:5|c|@0.1:6|g\nbar:1|c:5|ms",
out: event.Events{
&event.ObserverEvent{
OMetricName: "foo",
OValue: .200,
OLabels: map[string]string{},
},
&event.ObserverEvent{
OMetricName: "foo",
OValue: .300,
OLabels: map[string]string{},
},
&event.CounterEvent{
CMetricName: "foo",
CValue: 50,
CLabels: map[string]string{},
},
&event.GaugeEvent{
GMetricName: "foo",
GValue: 6,
GLabels: map[string]string{},
},
&event.CounterEvent{
CMetricName: "bar",
CValue: 1,
CLabels: map[string]string{},
},
&event.ObserverEvent{
OMetricName: "bar",
OValue: .005,
OLabels: map[string]string{},
},
},
}, {
name: "timings with sampling factor",
in: "foo.timing:0.5|ms|@0.1",
out: event.Events{
&event.ObserverEvent{OMetricName: "foo.timing", OValue: 0.0005, OLabels: map[string]string{}},
&event.ObserverEvent{OMetricName: "foo.timing", OValue: 0.0005, OLabels: map[string]string{}},
&event.ObserverEvent{OMetricName: "foo.timing", OValue: 0.0005, OLabels: map[string]string{}},
&event.ObserverEvent{OMetricName: "foo.timing", OValue: 0.0005, OLabels: map[string]string{}},
&event.ObserverEvent{OMetricName: "foo.timing", OValue: 0.0005, OLabels: map[string]string{}},
&event.ObserverEvent{OMetricName: "foo.timing", OValue: 0.0005, OLabels: map[string]string{}},
&event.ObserverEvent{OMetricName: "foo.timing", OValue: 0.0005, OLabels: map[string]string{}},
&event.ObserverEvent{OMetricName: "foo.timing", OValue: 0.0005, OLabels: map[string]string{}},
&event.ObserverEvent{OMetricName: "foo.timing", OValue: 0.0005, OLabels: map[string]string{}},
&event.ObserverEvent{OMetricName: "foo.timing", OValue: 0.0005, OLabels: map[string]string{}},
},
}, {
name: "bad line",
in: "foo",
}, {
name: "bad component",
in: "foo:1",
}, {
name: "bad value",
in: "foo:1o|c",
}, {
name: "illegal sampling factor",
in: "foo:1|c|@bar",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 1,
CLabels: map[string]string{},
},
},
}, {
name: "zero sampling factor",
in: "foo:2|c|@0",
out: event.Events{
&event.CounterEvent{
CMetricName: "foo",
CValue: 2,
CLabels: map[string]string{},
},
},
}, {
name: "illegal stat type",
in: "foo:2|t",
},
{
name: "empty metric name",
in: ":100|ms",
},
{
name: "empty component",
in: "foo:1|c|",
},
{
name: "invalid utf8",
in: "invalid\xc3\x28utf8:1|c",
},
{
name: "some invalid utf8",
in: "valid_utf8:1|c\ninvalid\xc3\x28utf8:1|c",
out: event.Events{
&event.CounterEvent{
CMetricName: "valid_utf8",
CValue: 1,
CLabels: map[string]string{},
},
},
}, {
name: "ms timer with conversion to seconds",
in: "foo:200|ms",
out: event.Events{
&event.ObserverEvent{
OMetricName: "foo",
OValue: 0.2,
OLabels: map[string]string{},
},
},
}, {
name: "histogram with no unit conversion",
in: "foo:200|h",
out: event.Events{
&event.ObserverEvent{
OMetricName: "foo",
OValue: 200,
OLabels: map[string]string{},
},
},
}, {
name: "distribution with no unit conversion",
in: "foo:200|d",
out: event.Events{
&event.ObserverEvent{
OMetricName: "foo",
OValue: 200,
OLabels: map[string]string{},
},
},
},
}
parser := line.NewParser()
parser.EnableDogstatsdParsing()
parser.EnableInfluxdbParsing()
parser.EnableLibratoParsing()
parser.EnableSignalFXParsing()
for k, l := range []statsDPacketHandler{&listener.StatsDUDPListener{
Conn: nil,
EventHandler: nil,
Logger: promslog.NewNopLogger(),
LineParser: parser,
UDPPackets: udpPackets,
UDPPacketDrops: udpPacketDrops,
LinesReceived: linesReceived,
EventsFlushed: eventsFlushed,
SampleErrors: *sampleErrors,
SamplesReceived: samplesReceived,
TagErrors: tagErrors,
TagsReceived: tagsReceived,
}, &mockStatsDTCPListener{listener.StatsDTCPListener{
Conn: nil,
EventHandler: nil,
Logger: promslog.NewNopLogger(),
LineParser: parser,
LinesReceived: linesReceived,
EventsFlushed: eventsFlushed,
SampleErrors: *sampleErrors,
SamplesReceived: samplesReceived,
TagErrors: tagErrors,
TagsReceived: tagsReceived,
TCPConnections: tcpConnections,
TCPErrors: tcpErrors,
TCPLineTooLong: tcpLineTooLong,
}, promslog.NewNopLogger()}} {
events := make(chan event.Events, 32)
l.SetEventHandler(&event.UnbufferedEventHandler{C: events})
for i, scenario := range scenarios {
l.HandlePacket([]byte(scenario.in))
le := len(events)
// Flatten actual events.
actual := event.Events{}
for j := 0; j < le; j++ {
actual = append(actual, <-events...)
}
if len(actual) != len(scenario.out) {
t.Fatalf("%d.%d. Expected %d events, got %d in scenario '%s'", k, i, len(scenario.out), len(actual), scenario.name)
}
for j, expected := range scenario.out {
if !reflect.DeepEqual(&expected, &actual[j]) {
t.Fatalf("%d.%d.%d. Expected %#v, got %#v in scenario '%s'", k, i, j, expected, actual[j], scenario.name)
}
}
}
}
}
type statsDPacketHandler interface {
HandlePacket(packet []byte)
SetEventHandler(eh event.EventHandler)
}
type mockStatsDTCPListener struct {
listener.StatsDTCPListener
*slog.Logger
}
func (ml *mockStatsDTCPListener) HandlePacket(packet []byte) {
// Forcing IPv4 because the TravisCI build environment does not have IPv6
// addresses.
lc, err := net.ListenTCP("tcp4", nil)
if err != nil {
panic(fmt.Sprintf("mockStatsDTCPListener: listen failed: %v", err))
}
defer lc.Close()
go func() {
cc, err := net.DialTCP("tcp", nil, lc.Addr().(*net.TCPAddr))
if err != nil {
panic(fmt.Sprintf("mockStatsDTCPListener: dial failed: %v", err))
}
defer cc.Close()
n, err := cc.Write(packet)
if err != nil || n != len(packet) {
panic(fmt.Sprintf("mockStatsDTCPListener: write failed: %v,%d", err, n))
}
}()
sc, err := lc.AcceptTCP()
if err != nil {
panic(fmt.Sprintf("mockStatsDTCPListener: accept failed: %v", err))
}
ml.HandleConn(sc)
}
// TestTtlExpiration validates expiration of time series.
// foobar metric without mapping should expire with default ttl of 1s
// bazqux metric should expire with ttl of 2s
func TestTtlExpiration(t *testing.T) {
// Mock a time.NewTicker
tickerCh := make(chan time.Time)
clock.ClockInstance = &clock.Clock{
TickerCh: tickerCh,
}
config := `
defaults:
ttl: 1s
mappings:
- match: bazqux.*
name: bazqux
ttl: 2s
`
// Create mapper from config and start an Exporter with a synchronous channel
testMapper := &mapper.MetricMapper{}
err := testMapper.InitFromYAMLString(config)
if err != nil {
t.Fatalf("Config load error: %s %s", config, err)
}
events := make(chan event.Events)
defer close(events)
go func() {
ex := exporter.NewExporter(prometheus.DefaultRegisterer, testMapper, promslog.NewNopLogger(), eventsActions, eventsUnmapped, errorEventStats, eventStats, conflictingEventStats, metricsCount)
ex.Listen(events)
}()
ev := event.Events{
// event with default ttl = 1s
&event.GaugeEvent{
GMetricName: "foobar",
GValue: 200,
},
// event with ttl = 2s from a mapping
&event.ObserverEvent{
OMetricName: "bazqux.main",
OValue: 42,
},
}
var metrics []*dto.MetricFamily
var foobarValue *float64
var bazquxValue *float64
// Step 1. Send events with statsd metrics.
// Send empty Events to wait for events are handled.
// saveLabelValues will use fake instant as a lastRegisteredAt time.
clock.ClockInstance.Instant = time.Unix(0, 0)
events <- ev
events <- event.Events{}
// Check values
metrics, err = prometheus.DefaultGatherer.Gather()
if err != nil {
t.Fatal("Gather should not fail")
}
foobarValue = getFloat64(metrics, "foobar", prometheus.Labels{})
bazquxValue = getFloat64(metrics, "bazqux", prometheus.Labels{})
if foobarValue == nil || bazquxValue == nil {
t.Fatalf("Gauge `foobar` and Summary `bazqux` should be gathered")
}
if *foobarValue != 200 {
t.Fatalf("Gauge `foobar` observation %f is not expected. Should be 200", *foobarValue)
}
if *bazquxValue != 42 {
t.Fatalf("Summary `bazqux` observation %f is not expected. Should be 42", *bazquxValue)
}
// Step 2. Increase Instant to emulate metrics expiration after 1s
clock.ClockInstance.Instant = time.Unix(1, 10)
clock.ClockInstance.TickerCh <- time.Unix(0, 0)
events <- event.Events{}
// Check values
metrics, err = prometheus.DefaultGatherer.Gather()
if err != nil {
t.Fatal("Gather should not fail")
}
foobarValue = getFloat64(metrics, "foobar", prometheus.Labels{})
bazquxValue = getFloat64(metrics, "bazqux", prometheus.Labels{})
if foobarValue != nil {
t.Fatalf("Gauge `foobar` should be expired")
}
if bazquxValue == nil {
t.Fatalf("Summary `bazqux` should be gathered")
}
if *bazquxValue != 42 {
t.Fatalf("Summary `bazqux` observation %f is not expected. Should be 42", *bazquxValue)
}
// Step 3. Increase Instant to emulate metrics expiration after 2s
clock.ClockInstance.Instant = time.Unix(2, 200)
clock.ClockInstance.TickerCh <- time.Unix(0, 0)
events <- event.Events{}
// Check values
metrics, err = prometheus.DefaultGatherer.Gather()
if err != nil {
t.Fatal("Gather should not fail")
}
foobarValue = getFloat64(metrics, "foobar", prometheus.Labels{})
bazquxValue = getFloat64(metrics, "bazqux", prometheus.Labels{})
if bazquxValue != nil {
t.Fatalf("Summary `bazqux` should be expired")
}
if foobarValue != nil {
t.Fatalf("Gauge `foobar` should not be gathered after expiration")
}
}
// 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
}
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