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prometheus/scrape/manager_test.go
Bryan Boreham 17f48f2b3b Tests: use replacement DeepEquals in more places 
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
2024-02-08 19:32:33 +00:00

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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 scrape
import (
"context"
"fmt"
"net/http"
"net/http/httptest"
"net/url"
"os"
"strconv"
"sync"
"testing"
"time"
"github.com/go-kit/log"
"github.com/gogo/protobuf/proto"
"github.com/prometheus/client_golang/prometheus"
dto "github.com/prometheus/client_model/go"
"github.com/prometheus/common/model"
"github.com/stretchr/testify/require"
"google.golang.org/protobuf/types/known/timestamppb"
"gopkg.in/yaml.v2"
"github.com/prometheus/prometheus/config"
"github.com/prometheus/prometheus/discovery"
"github.com/prometheus/prometheus/discovery/targetgroup"
"github.com/prometheus/prometheus/model/labels"
"github.com/prometheus/prometheus/model/relabel"
"github.com/prometheus/prometheus/util/runutil"
"github.com/prometheus/prometheus/util/testutil"
)
func TestPopulateLabels(t *testing.T) {
cases := []struct {
in labels.Labels
cfg *config.ScrapeConfig
noDefaultPort bool
res labels.Labels
resOrig labels.Labels
err string
}{
// Regular population of scrape config options.
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:1000",
"custom": "value",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
res: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:1000",
model.InstanceLabel: "1.2.3.4:1000",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
"custom": "value",
}),
resOrig: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:1000",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
"custom": "value",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
}),
},
// Pre-define/overwrite scrape config labels.
// Leave out port and expect it to be defaulted to scheme.
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4",
model.SchemeLabel: "http",
model.MetricsPathLabel: "/custom",
model.JobLabel: "custom-job",
model.ScrapeIntervalLabel: "2s",
model.ScrapeTimeoutLabel: "2s",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
res: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:80",
model.InstanceLabel: "1.2.3.4:80",
model.SchemeLabel: "http",
model.MetricsPathLabel: "/custom",
model.JobLabel: "custom-job",
model.ScrapeIntervalLabel: "2s",
model.ScrapeTimeoutLabel: "2s",
}),
resOrig: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4",
model.SchemeLabel: "http",
model.MetricsPathLabel: "/custom",
model.JobLabel: "custom-job",
model.ScrapeIntervalLabel: "2s",
model.ScrapeTimeoutLabel: "2s",
}),
},
// Provide instance label. HTTPS port default for IPv6.
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "[::1]",
model.InstanceLabel: "custom-instance",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
res: labels.FromMap(map[string]string{
model.AddressLabel: "[::1]:443",
model.InstanceLabel: "custom-instance",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
}),
resOrig: labels.FromMap(map[string]string{
model.AddressLabel: "[::1]",
model.InstanceLabel: "custom-instance",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
}),
},
// Address label missing.
{
in: labels.FromStrings("custom", "value"),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
res: labels.EmptyLabels(),
resOrig: labels.EmptyLabels(),
err: "no address",
},
// Address label missing, but added in relabelling.
{
in: labels.FromStrings("custom", "host:1234"),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
RelabelConfigs: []*relabel.Config{
{
Action: relabel.Replace,
Regex: relabel.MustNewRegexp("(.*)"),
SourceLabels: model.LabelNames{"custom"},
Replacement: "${1}",
TargetLabel: string(model.AddressLabel),
},
},
},
res: labels.FromMap(map[string]string{
model.AddressLabel: "host:1234",
model.InstanceLabel: "host:1234",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
"custom": "host:1234",
}),
resOrig: labels.FromMap(map[string]string{
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
"custom": "host:1234",
}),
},
// Address label missing, but added in relabelling.
{
in: labels.FromStrings("custom", "host:1234"),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
RelabelConfigs: []*relabel.Config{
{
Action: relabel.Replace,
Regex: relabel.MustNewRegexp("(.*)"),
SourceLabels: model.LabelNames{"custom"},
Replacement: "${1}",
TargetLabel: string(model.AddressLabel),
},
},
},
res: labels.FromMap(map[string]string{
model.AddressLabel: "host:1234",
model.InstanceLabel: "host:1234",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
"custom": "host:1234",
}),
resOrig: labels.FromMap(map[string]string{
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
"custom": "host:1234",
}),
},
// Invalid UTF-8 in label.
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:1000",
"custom": "\xbd",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
res: labels.EmptyLabels(),
resOrig: labels.EmptyLabels(),
err: "invalid label value for \"custom\": \"\\xbd\"",
},
// Invalid duration in interval label.
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:1000",
model.ScrapeIntervalLabel: "2notseconds",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
res: labels.EmptyLabels(),
resOrig: labels.EmptyLabels(),
err: "error parsing scrape interval: unknown unit \"notseconds\" in duration \"2notseconds\"",
},
// Invalid duration in timeout label.
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:1000",
model.ScrapeTimeoutLabel: "2notseconds",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
res: labels.EmptyLabels(),
resOrig: labels.EmptyLabels(),
err: "error parsing scrape timeout: unknown unit \"notseconds\" in duration \"2notseconds\"",
},
// 0 interval in timeout label.
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:1000",
model.ScrapeIntervalLabel: "0s",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
res: labels.EmptyLabels(),
resOrig: labels.EmptyLabels(),
err: "scrape interval cannot be 0",
},
// 0 duration in timeout label.
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:1000",
model.ScrapeTimeoutLabel: "0s",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
res: labels.EmptyLabels(),
resOrig: labels.EmptyLabels(),
err: "scrape timeout cannot be 0",
},
// Timeout less than interval.
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:1000",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "2s",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
res: labels.EmptyLabels(),
resOrig: labels.EmptyLabels(),
err: "scrape timeout cannot be greater than scrape interval (\"2s\" > \"1s\")",
},
// Don't attach default port.
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
noDefaultPort: true,
res: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4",
model.InstanceLabel: "1.2.3.4",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
}),
resOrig: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
}),
},
// Remove default port (http).
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:80",
}),
cfg: &config.ScrapeConfig{
Scheme: "http",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
noDefaultPort: true,
res: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4",
model.InstanceLabel: "1.2.3.4:80",
model.SchemeLabel: "http",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
}),
resOrig: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:80",
model.SchemeLabel: "http",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
}),
},
// Remove default port (https).
{
in: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:443",
}),
cfg: &config.ScrapeConfig{
Scheme: "https",
MetricsPath: "/metrics",
JobName: "job",
ScrapeInterval: model.Duration(time.Second),
ScrapeTimeout: model.Duration(time.Second),
},
noDefaultPort: true,
res: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4",
model.InstanceLabel: "1.2.3.4:443",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
}),
resOrig: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:443",
model.SchemeLabel: "https",
model.MetricsPathLabel: "/metrics",
model.JobLabel: "job",
model.ScrapeIntervalLabel: "1s",
model.ScrapeTimeoutLabel: "1s",
}),
},
}
for _, c := range cases {
in := c.in.Copy()
res, orig, err := PopulateLabels(labels.NewBuilder(c.in), c.cfg, c.noDefaultPort)
if c.err != "" {
require.EqualError(t, err, c.err)
} else {
require.NoError(t, err)
}
require.Equal(t, c.in, in)
testutil.RequireEqual(t, c.res, res)
testutil.RequireEqual(t, c.resOrig, orig)
}
}
func loadConfiguration(t testing.TB, c string) *config.Config {
t.Helper()
cfg := &config.Config{}
err := yaml.UnmarshalStrict([]byte(c), cfg)
require.NoError(t, err, "Unable to load YAML config.")
return cfg
}
func noopLoop() loop {
return &testLoop{
startFunc: func(interval, timeout time.Duration, errc chan<- error) {},
stopFunc: func() {},
}
}
func TestManagerApplyConfig(t *testing.T) {
// Valid initial configuration.
cfgText1 := `
scrape_configs:
- job_name: job1
static_configs:
- targets: ["foo:9090"]
`
// Invalid configuration.
cfgText2 := `
scrape_configs:
- job_name: job1
scheme: https
static_configs:
- targets: ["foo:9090"]
tls_config:
ca_file: /not/existing/ca/file
`
// Valid configuration.
cfgText3 := `
scrape_configs:
- job_name: job1
scheme: https
static_configs:
- targets: ["foo:9090"]
`
var (
cfg1 = loadConfiguration(t, cfgText1)
cfg2 = loadConfiguration(t, cfgText2)
cfg3 = loadConfiguration(t, cfgText3)
ch = make(chan struct{}, 1)
testRegistry = prometheus.NewRegistry()
)
opts := Options{}
scrapeManager, err := NewManager(&opts, nil, nil, testRegistry)
require.NoError(t, err)
newLoop := func(scrapeLoopOptions) loop {
ch <- struct{}{}
return noopLoop()
}
sp := &scrapePool{
appendable: &nopAppendable{},
activeTargets: map[uint64]*Target{
1: {},
},
loops: map[uint64]loop{
1: noopLoop(),
},
newLoop: newLoop,
logger: nil,
config: cfg1.ScrapeConfigs[0],
client: http.DefaultClient,
metrics: scrapeManager.metrics,
}
scrapeManager.scrapePools = map[string]*scrapePool{
"job1": sp,
}
// Apply the initial configuration.
err = scrapeManager.ApplyConfig(cfg1)
require.NoError(t, err, "Unable to apply configuration.")
select {
case <-ch:
require.FailNow(t, "Reload happened.")
default:
}
// Apply a configuration for which the reload fails.
err = scrapeManager.ApplyConfig(cfg2)
require.Error(t, err, "Expecting error but got none.")
select {
case <-ch:
require.FailNow(t, "Reload happened.")
default:
}
// Apply a configuration for which the reload succeeds.
err = scrapeManager.ApplyConfig(cfg3)
require.NoError(t, err, "Unable to apply configuration.")
select {
case <-ch:
default:
require.FailNow(t, "Reload didn't happen.")
}
// Re-applying the same configuration shouldn't trigger a reload.
err = scrapeManager.ApplyConfig(cfg3)
require.NoError(t, err, "Unable to apply configuration.")
select {
case <-ch:
require.FailNow(t, "Reload happened.")
default:
}
}
func TestManagerTargetsUpdates(t *testing.T) {
opts := Options{}
testRegistry := prometheus.NewRegistry()
m, err := NewManager(&opts, nil, nil, testRegistry)
require.NoError(t, err)
ts := make(chan map[string][]*targetgroup.Group)
go m.Run(ts)
defer m.Stop()
tgSent := make(map[string][]*targetgroup.Group)
for x := 0; x < 10; x++ {
tgSent[strconv.Itoa(x)] = []*targetgroup.Group{
{
Source: strconv.Itoa(x),
},
}
select {
case ts <- tgSent:
case <-time.After(10 * time.Millisecond):
require.Fail(t, "Scrape manager's channel remained blocked after the set threshold.")
}
}
m.mtxScrape.Lock()
tsetActual := m.targetSets
m.mtxScrape.Unlock()
// Make sure all updates have been received.
require.Equal(t, tgSent, tsetActual)
select {
case <-m.triggerReload:
default:
require.Fail(t, "No scrape loops reload was triggered after targets update.")
}
}
func TestSetOffsetSeed(t *testing.T) {
getConfig := func(prometheus string) *config.Config {
cfgText := `
global:
external_labels:
prometheus: '` + prometheus + `'
`
cfg := &config.Config{}
err := yaml.UnmarshalStrict([]byte(cfgText), cfg)
require.NoError(t, err, "Unable to load YAML config cfgYaml.")
return cfg
}
opts := Options{}
testRegistry := prometheus.NewRegistry()
scrapeManager, err := NewManager(&opts, nil, nil, testRegistry)
require.NoError(t, err)
// Load the first config.
cfg1 := getConfig("ha1")
err = scrapeManager.setOffsetSeed(cfg1.GlobalConfig.ExternalLabels)
require.NoError(t, err)
offsetSeed1 := scrapeManager.offsetSeed
require.NotZero(t, offsetSeed1, "Offset seed has to be a hash of uint64.")
// Load the first config.
cfg2 := getConfig("ha2")
require.NoError(t, scrapeManager.setOffsetSeed(cfg2.GlobalConfig.ExternalLabels))
offsetSeed2 := scrapeManager.offsetSeed
require.NotEqual(t, offsetSeed1, offsetSeed2, "Offset seed should not be the same on different set of external labels.")
}
func TestManagerScrapePools(t *testing.T) {
cfgText1 := `
scrape_configs:
- job_name: job1
static_configs:
- targets: ["foo:9090"]
- job_name: job2
static_configs:
- targets: ["foo:9091", "foo:9092"]
`
cfgText2 := `
scrape_configs:
- job_name: job1
static_configs:
- targets: ["foo:9090", "foo:9094"]
- job_name: job3
static_configs:
- targets: ["foo:9093"]
`
var (
cfg1 = loadConfiguration(t, cfgText1)
cfg2 = loadConfiguration(t, cfgText2)
testRegistry = prometheus.NewRegistry()
)
reload := func(scrapeManager *Manager, cfg *config.Config) {
newLoop := func(scrapeLoopOptions) loop {
return noopLoop()
}
scrapeManager.scrapePools = map[string]*scrapePool{}
for _, sc := range cfg.ScrapeConfigs {
_, cancel := context.WithCancel(context.Background())
defer cancel()
sp := &scrapePool{
appendable: &nopAppendable{},
activeTargets: map[uint64]*Target{},
loops: map[uint64]loop{
1: noopLoop(),
},
newLoop: newLoop,
logger: nil,
config: sc,
client: http.DefaultClient,
cancel: cancel,
}
for _, c := range sc.ServiceDiscoveryConfigs {
staticConfig := c.(discovery.StaticConfig)
for _, group := range staticConfig {
for i := range group.Targets {
sp.activeTargets[uint64(i)] = &Target{}
}
}
}
scrapeManager.scrapePools[sc.JobName] = sp
}
}
opts := Options{}
scrapeManager, err := NewManager(&opts, nil, nil, testRegistry)
require.NoError(t, err)
reload(scrapeManager, cfg1)
require.ElementsMatch(t, []string{"job1", "job2"}, scrapeManager.ScrapePools())
reload(scrapeManager, cfg2)
require.ElementsMatch(t, []string{"job1", "job3"}, scrapeManager.ScrapePools())
}
// TestManagerCTZeroIngestion tests scrape manager for CT cases.
func TestManagerCTZeroIngestion(t *testing.T) {
const mName = "expected_counter"
for _, tc := range []struct {
name string
counterSample *dto.Counter
enableCTZeroIngestion bool
expectedValues []float64
}{
{
name: "disabled with CT on counter",
counterSample: &dto.Counter{
Value: proto.Float64(1.0),
// Timestamp does not matter as long as it exists in this test.
CreatedTimestamp: timestamppb.Now(),
},
expectedValues: []float64{1.0},
},
{
name: "enabled with CT on counter",
counterSample: &dto.Counter{
Value: proto.Float64(1.0),
// Timestamp does not matter as long as it exists in this test.
CreatedTimestamp: timestamppb.Now(),
},
enableCTZeroIngestion: true,
expectedValues: []float64{0.0, 1.0},
},
{
name: "enabled without CT on counter",
counterSample: &dto.Counter{
Value: proto.Float64(1.0),
},
enableCTZeroIngestion: true,
expectedValues: []float64{1.0},
},
} {
t.Run(tc.name, func(t *testing.T) {
app := &collectResultAppender{}
scrapeManager, err := NewManager(
&Options{
EnableCreatedTimestampZeroIngestion: tc.enableCTZeroIngestion,
skipOffsetting: true,
},
log.NewLogfmtLogger(os.Stderr),
&collectResultAppendable{app},
prometheus.NewRegistry(),
)
require.NoError(t, err)
require.NoError(t, scrapeManager.ApplyConfig(&config.Config{
GlobalConfig: config.GlobalConfig{
// Disable regular scrapes.
ScrapeInterval: model.Duration(9999 * time.Minute),
ScrapeTimeout: model.Duration(5 * time.Second),
// Ensure the proto is chosen. We need proto as it's the only protocol
// with the CT parsing support.
ScrapeProtocols: []config.ScrapeProtocol{config.PrometheusProto},
},
ScrapeConfigs: []*config.ScrapeConfig{{JobName: "test"}},
}))
once := sync.Once{}
// Start fake HTTP target to that allow one scrape only.
server := httptest.NewServer(
http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fail := true
once.Do(func() {
fail = false
w.Header().Set("Content-Type", `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=delimited`)
ctrType := dto.MetricType_COUNTER
w.Write(protoMarshalDelimited(t, &dto.MetricFamily{
Name: proto.String(mName),
Type: &ctrType,
Metric: []*dto.Metric{{Counter: tc.counterSample}},
}))
})
if fail {
w.WriteHeader(http.StatusInternalServerError)
}
}),
)
defer server.Close()
serverURL, err := url.Parse(server.URL)
require.NoError(t, err)
// Add fake target directly into tsets + reload. Normally users would use
// Manager.Run and wait for minimum 5s refresh interval.
scrapeManager.updateTsets(map[string][]*targetgroup.Group{
"test": {{
Targets: []model.LabelSet{{
model.SchemeLabel: model.LabelValue(serverURL.Scheme),
model.AddressLabel: model.LabelValue(serverURL.Host),
}},
}},
})
scrapeManager.reload()
// Wait for one scrape.
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Minute)
defer cancel()
require.NoError(t, runutil.Retry(100*time.Millisecond, ctx.Done(), func() error {
if countFloatSamples(app, mName) != len(tc.expectedValues) {
return fmt.Errorf("expected %v samples", tc.expectedValues)
}
return nil
}), "after 1 minute")
scrapeManager.Stop()
require.Equal(t, tc.expectedValues, getResultFloats(app, mName))
})
}
}
func countFloatSamples(a *collectResultAppender, expectedMetricName string) (count int) {
a.mtx.Lock()
defer a.mtx.Unlock()
for _, f := range a.resultFloats {
if f.metric.Get(model.MetricNameLabel) == expectedMetricName {
count++
}
}
return count
}
func getResultFloats(app *collectResultAppender, expectedMetricName string) (result []float64) {
app.mtx.Lock()
defer app.mtx.Unlock()
for _, f := range app.resultFloats {
if f.metric.Get(model.MetricNameLabel) == expectedMetricName {
result = append(result, f.f)
}
}
return result
}
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