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prometheus/scrape/manager_test.go

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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 (
"bytes"
"context"
"errors"
"fmt"
"net/http"
"net/http/httptest"
"net/url"
"os"
"sort"
"strconv"
"sync"
"testing"
"time"
"github.com/gogo/protobuf/proto"
"github.com/prometheus/client_golang/prometheus"
dto "github.com/prometheus/client_model/go"
"github.com/prometheus/common/expfmt"
"github.com/prometheus/common/model"
"github.com/prometheus/common/promslog"
"github.com/stretchr/testify/require"
"google.golang.org/protobuf/types/known/timestamppb"
"gopkg.in/yaml.v2"
"github.com/prometheus/prometheus/model/timestamp"
"github.com/prometheus/prometheus/config"
"github.com/prometheus/prometheus/discovery"
_ "github.com/prometheus/prometheus/discovery/file"
"github.com/prometheus/prometheus/discovery/targetgroup"
"github.com/prometheus/prometheus/model/histogram"
"github.com/prometheus/prometheus/model/labels"
"github.com/prometheus/prometheus/model/relabel"
"github.com/prometheus/prometheus/tsdb/tsdbutil"
"github.com/prometheus/prometheus/util/runutil"
"github.com/prometheus/prometheus/util/testutil"
)
func init() {
// This can be removed when the default validation scheme in common is updated.
model.NameValidationScheme = model.UTF8Validation
}
func TestPopulateLabels(t *testing.T) {
cases := []struct {
in labels.Labels
cfg *config.ScrapeConfig
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",
model.InstanceLabel: "1.2.3.4",
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]",
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),
},
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",
}),
},
// verify that the default port is not removed (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),
},
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: "/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",
}),
},
// verify that the default port is not removed (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),
},
res: labels.FromMap(map[string]string{
model.AddressLabel: "1.2.3.4:443",
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)
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, 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,
symbolTable: labels.NewSymbolTable(),
}
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, 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, 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, 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())
}
func setupScrapeManager(t *testing.T, honorTimestamps, enableCTZeroIngestion bool) (*collectResultAppender, *Manager) {
app := &collectResultAppender{}
scrapeManager, err := NewManager(
&Options{
EnableCreatedTimestampZeroIngestion: enableCTZeroIngestion,
skipOffsetting: true,
},
promslog.New(&promslog.Config{}),
nil,
&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),
ScrapeProtocols: []config.ScrapeProtocol{config.OpenMetricsText1_0_0, config.PrometheusProto},
},
ScrapeConfigs: []*config.ScrapeConfig{{JobName: "test", HonorTimestamps: honorTimestamps}},
}))
return app, scrapeManager
}
func setupTestServer(t *testing.T, typ string, toWrite []byte) *httptest.Server {
once := sync.Once{}
server := httptest.NewServer(
http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fail := true
once.Do(func() {
fail = false
w.Header().Set("Content-Type", typ)
w.Write(toWrite)
})
if fail {
w.WriteHeader(http.StatusInternalServerError)
}
}),
)
t.Cleanup(func() { server.Close() })
return server
}
// TestManagerCTZeroIngestion tests scrape manager for various CT cases.
func TestManagerCTZeroIngestion(t *testing.T) {
const (
// _total suffix is required, otherwise expfmt with OMText will mark metric as "unknown"
expectedMetricName = "expected_metric_total"
expectedCreatedMetricName = "expected_metric_created"
expectedSampleValue = 17.0
)
for _, testFormat := range []config.ScrapeProtocol{config.PrometheusProto, config.OpenMetricsText1_0_0} {
t.Run(fmt.Sprintf("format=%s", testFormat), func(t *testing.T) {
for _, testWithCT := range []bool{false, true} {
t.Run(fmt.Sprintf("withCT=%v", testWithCT), func(t *testing.T) {
for _, testCTZeroIngest := range []bool{false, true} {
t.Run(fmt.Sprintf("ctZeroIngest=%v", testCTZeroIngest), func(t *testing.T) {
sampleTs := time.Now()
ctTs := time.Time{}
if testWithCT {
ctTs = sampleTs.Add(-2 * time.Minute)
}
// TODO(bwplotka): Add more types than just counter?
encoded := prepareTestEncodedCounter(t, testFormat, expectedMetricName, expectedSampleValue, sampleTs, ctTs)
app, scrapeManager := setupScrapeManager(t, true, testCTZeroIngest)
// Perform the test.
doOneScrape(t, scrapeManager, app, setupTestServer(t, config.ScrapeProtocolsHeaders[testFormat], encoded))
// Verify results.
// Verify what we got vs expectations around CT injection.
samples := findSamplesForMetric(app.resultFloats, expectedMetricName)
if testWithCT && testCTZeroIngest {
require.Len(t, samples, 2)
require.Equal(t, 0.0, samples[0].f)
require.Equal(t, timestamp.FromTime(ctTs), samples[0].t)
require.Equal(t, expectedSampleValue, samples[1].f)
require.Equal(t, timestamp.FromTime(sampleTs), samples[1].t)
} else {
require.Len(t, samples, 1)
require.Equal(t, expectedSampleValue, samples[0].f)
require.Equal(t, timestamp.FromTime(sampleTs), samples[0].t)
}
// Verify what we got vs expectations around additional _created series for OM text.
// enableCTZeroInjection also kills that _created line.
createdSeriesSamples := findSamplesForMetric(app.resultFloats, expectedCreatedMetricName)
if testFormat == config.OpenMetricsText1_0_0 && testWithCT && !testCTZeroIngest {
// For OM Text, when counter has CT, and feature flag disabled we should see _created lines.
require.Len(t, createdSeriesSamples, 1)
// Conversion taken from common/expfmt.writeOpenMetricsFloat.
// We don't check the ct timestamp as explicit ts was not implemented in expfmt.Encoder,
// but exists in OM https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#:~:text=An%20example%20with%20a%20Metric%20with%20no%20labels%2C%20and%20a%20MetricPoint%20with%20a%20timestamp%20and%20a%20created
// We can implement this, but we want to potentially get rid of OM 1.0 CT lines
require.Equal(t, float64(timestamppb.New(ctTs).AsTime().UnixNano())/1e9, createdSeriesSamples[0].f)
} else {
require.Empty(t, createdSeriesSamples)
}
})
}
})
}
})
}
}
func prepareTestEncodedCounter(t *testing.T, format config.ScrapeProtocol, mName string, v float64, ts, ct time.Time) (encoded []byte) {
t.Helper()
counter := &dto.Counter{Value: proto.Float64(v)}
if !ct.IsZero() {
counter.CreatedTimestamp = timestamppb.New(ct)
}
ctrType := dto.MetricType_COUNTER
inputMetric := &dto.MetricFamily{
Name: proto.String(mName),
Type: &ctrType,
Metric: []*dto.Metric{{
TimestampMs: proto.Int64(timestamp.FromTime(ts)),
Counter: counter,
}},
}
switch format {
case config.PrometheusProto:
return protoMarshalDelimited(t, inputMetric)
case config.OpenMetricsText1_0_0:
buf := &bytes.Buffer{}
require.NoError(t, expfmt.NewEncoder(buf, expfmt.NewFormat(expfmt.TypeOpenMetrics), expfmt.WithCreatedLines(), expfmt.WithUnit()).Encode(inputMetric))
_, _ = buf.WriteString("# EOF")
t.Log("produced OM text to expose:", buf.String())
return buf.Bytes()
default:
t.Fatalf("not implemented format: %v", format)
return nil
}
}
func doOneScrape(t *testing.T, manager *Manager, appender *collectResultAppender, server *httptest.Server) {
t.Helper()
serverURL, err := url.Parse(server.URL)
require.NoError(t, err)
// Add fake target directly into tsets + reload
manager.updateTsets(map[string][]*targetgroup.Group{
"test": {{
Targets: []model.LabelSet{{
model.SchemeLabel: model.LabelValue(serverURL.Scheme),
model.AddressLabel: model.LabelValue(serverURL.Host),
}},
}},
})
manager.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 {
appender.mtx.Lock()
defer appender.mtx.Unlock()
// Check if scrape happened and grab the relevant samples.
if len(appender.resultFloats) > 0 {
return nil
}
return errors.New("expected some float samples, got none")
}), "after 1 minute")
manager.Stop()
}
func findSamplesForMetric(floats []floatSample, metricName string) (ret []floatSample) {
for _, f := range floats {
if f.metric.Get(model.MetricNameLabel) == metricName {
ret = append(ret, f)
}
}
return ret
}
// generateTestHistogram generates the same thing as tsdbutil.GenerateTestHistogram,
// but in the form of dto.Histogram.
func generateTestHistogram(i int) *dto.Histogram {
helper := tsdbutil.GenerateTestHistogram(i)
h := &dto.Histogram{}
h.SampleCount = proto.Uint64(helper.Count)
h.SampleSum = proto.Float64(helper.Sum)
h.Schema = proto.Int32(helper.Schema)
h.ZeroThreshold = proto.Float64(helper.ZeroThreshold)
h.ZeroCount = proto.Uint64(helper.ZeroCount)
h.PositiveSpan = make([]*dto.BucketSpan, len(helper.PositiveSpans))
for i, span := range helper.PositiveSpans {
h.PositiveSpan[i] = &dto.BucketSpan{
Offset: proto.Int32(span.Offset),
Length: proto.Uint32(span.Length),
}
}
h.PositiveDelta = helper.PositiveBuckets
h.NegativeSpan = make([]*dto.BucketSpan, len(helper.NegativeSpans))
for i, span := range helper.NegativeSpans {
h.NegativeSpan[i] = &dto.BucketSpan{
Offset: proto.Int32(span.Offset),
Length: proto.Uint32(span.Length),
}
}
h.NegativeDelta = helper.NegativeBuckets
return h
}
func TestManagerCTZeroIngestionHistogram(t *testing.T) {
const mName = "expected_histogram"
for _, tc := range []struct {
name string
inputHistSample *dto.Histogram
enableCTZeroIngestion bool
}{
{
name: "disabled with CT on histogram",
inputHistSample: func() *dto.Histogram {
h := generateTestHistogram(0)
h.CreatedTimestamp = timestamppb.Now()
return h
}(),
enableCTZeroIngestion: false,
},
{
name: "enabled with CT on histogram",
inputHistSample: func() *dto.Histogram {
h := generateTestHistogram(0)
h.CreatedTimestamp = timestamppb.Now()
return h
}(),
enableCTZeroIngestion: true,
},
{
name: "enabled without CT on histogram",
inputHistSample: func() *dto.Histogram {
h := generateTestHistogram(0)
return h
}(),
enableCTZeroIngestion: true,
},
} {
t.Run(tc.name, func(t *testing.T) {
app := &collectResultAppender{}
scrapeManager, err := NewManager(
&Options{
EnableCreatedTimestampZeroIngestion: tc.enableCTZeroIngestion,
EnableNativeHistogramsIngestion: true,
skipOffsetting: true,
},
promslog.New(&promslog.Config{}),
nil,
&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 // TODO(bwplotka): Kill or use?
once.Do(func() {
fail = false
w.Header().Set("Content-Type", `application/vnd.google.protobuf; proto=io.prometheus.client.MetricFamily; encoding=delimited`)
ctrType := dto.MetricType_HISTOGRAM
w.Write(protoMarshalDelimited(t, &dto.MetricFamily{
Name: proto.String(mName),
Type: &ctrType,
Metric: []*dto.Metric{{Histogram: tc.inputHistSample}},
}))
})
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()
var got []histogramSample
// 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 {
app.mtx.Lock()
defer app.mtx.Unlock()
// Check if scrape happened and grab the relevant histograms, they have to be there - or it's a bug
// and it's not worth waiting.
for _, h := range app.resultHistograms {
if h.metric.Get(model.MetricNameLabel) == mName {
got = append(got, h)
}
}
if len(app.resultHistograms) > 0 {
return nil
}
return errors.New("expected some histogram samples, got none")
}), "after 1 minute")
scrapeManager.Stop()
// Check for zero samples, assuming we only injected always one histogram sample.
// Did it contain CT to inject? If yes, was CT zero enabled?
if tc.inputHistSample.CreatedTimestamp.IsValid() && tc.enableCTZeroIngestion {
require.Len(t, got, 2)
// Zero sample.
require.Equal(t, histogram.Histogram{}, *got[0].h)
// Quick soft check to make sure it's the same sample or at least not zero.
require.Equal(t, tc.inputHistSample.GetSampleSum(), got[1].h.Sum)
return
}
// Expect only one, valid sample.
require.Len(t, got, 1)
// Quick soft check to make sure it's the same sample or at least not zero.
require.Equal(t, tc.inputHistSample.GetSampleSum(), got[0].h.Sum)
})
}
}
func TestUnregisterMetrics(t *testing.T) {
reg := prometheus.NewRegistry()
// Check that all metrics can be unregistered, allowing a second manager to be created.
for i := 0; i < 2; i++ {
opts := Options{}
manager, err := NewManager(&opts, nil, nil, nil, reg)
require.NotNil(t, manager)
require.NoError(t, err)
// Unregister all metrics.
manager.UnregisterMetrics()
}
}
func applyConfig(
t *testing.T,
config string,
scrapeManager *Manager,
discoveryManager *discovery.Manager,
) {
t.Helper()
cfg := loadConfiguration(t, config)
require.NoError(t, scrapeManager.ApplyConfig(cfg))
c := make(map[string]discovery.Configs)
scfgs, err := cfg.GetScrapeConfigs()
require.NoError(t, err)
for _, v := range scfgs {
c[v.JobName] = v.ServiceDiscoveryConfigs
}
require.NoError(t, discoveryManager.ApplyConfig(c))
}
func runManagers(t *testing.T, ctx context.Context) (*discovery.Manager, *Manager) {
t.Helper()
reg := prometheus.NewRegistry()
sdMetrics, err := discovery.RegisterSDMetrics(reg, discovery.NewRefreshMetrics(reg))
require.NoError(t, err)
discoveryManager := discovery.NewManager(
ctx,
promslog.NewNopLogger(),
reg,
sdMetrics,
discovery.Updatert(100*time.Millisecond),
)
scrapeManager, err := NewManager(
&Options{DiscoveryReloadInterval: model.Duration(100 * time.Millisecond)},
nil,
nil,
nopAppendable{},
prometheus.NewRegistry(),
)
require.NoError(t, err)
go discoveryManager.Run()
go scrapeManager.Run(discoveryManager.SyncCh())
return discoveryManager, scrapeManager
}
func writeIntoFile(t *testing.T, content, filePattern string) *os.File {
t.Helper()
file, err := os.CreateTemp("", filePattern)
require.NoError(t, err)
_, err = file.WriteString(content)
require.NoError(t, err)
return file
}
func requireTargets(
t *testing.T,
scrapeManager *Manager,
jobName string,
waitToAppear bool,
expectedTargets []string,
) {
t.Helper()
require.Eventually(t, func() bool {
targets, ok := scrapeManager.TargetsActive()[jobName]
if !ok {
if waitToAppear {
return false
}
t.Fatalf("job %s shouldn't be dropped", jobName)
}
if expectedTargets == nil {
return targets == nil
}
if len(targets) != len(expectedTargets) {
return false
}
sTargets := []string{}
for _, t := range targets {
sTargets = append(sTargets, t.String())
}
sort.Strings(expectedTargets)
sort.Strings(sTargets)
for i, t := range sTargets {
if t != expectedTargets[i] {
return false
}
}
return true
}, 1*time.Second, 100*time.Millisecond)
}
// TestTargetDisappearsAfterProviderRemoved makes sure that when a provider is dropped, (only) its targets are dropped.
func TestTargetDisappearsAfterProviderRemoved(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
myJob := "my-job"
myJobSDTargetURL := "my:9876"
myJobStaticTargetURL := "my:5432"
sdFileContent := fmt.Sprintf(`[{"targets": ["%s"]}]`, myJobSDTargetURL)
sDFile := writeIntoFile(t, sdFileContent, "*targets.json")
baseConfig := `
scrape_configs:
- job_name: %s
static_configs:
- targets: ['%s']
file_sd_configs:
- files: ['%s']
`
discoveryManager, scrapeManager := runManagers(t, ctx)
defer scrapeManager.Stop()
applyConfig(
t,
fmt.Sprintf(
baseConfig,
myJob,
myJobStaticTargetURL,
sDFile.Name(),
),
scrapeManager,
discoveryManager,
)
// Make sure the jobs targets are taken into account
requireTargets(
t,
scrapeManager,
myJob,
true,
[]string{
fmt.Sprintf("http://%s/metrics", myJobSDTargetURL),
fmt.Sprintf("http://%s/metrics", myJobStaticTargetURL),
},
)
// Apply a new config where a provider is removed
baseConfig = `
scrape_configs:
- job_name: %s
static_configs:
- targets: ['%s']
`
applyConfig(
t,
fmt.Sprintf(
baseConfig,
myJob,
myJobStaticTargetURL,
),
scrapeManager,
discoveryManager,
)
// Make sure the corresponding target was dropped
requireTargets(
t,
scrapeManager,
myJob,
false,
[]string{
fmt.Sprintf("http://%s/metrics", myJobStaticTargetURL),
},
)
// Apply a new config with no providers
baseConfig = `
scrape_configs:
- job_name: %s
`
applyConfig(
t,
fmt.Sprintf(
baseConfig,
myJob,
),
scrapeManager,
discoveryManager,
)
// Make sure the corresponding target was dropped
requireTargets(
t,
scrapeManager,
myJob,
false,
nil,
)
}
// TestOnlyProviderStaleTargetsAreDropped makes sure that when a job has only one provider with multiple targets
// and when the provider can no longer discover some of those targets, only those stale targets are dropped.
func TestOnlyProviderStaleTargetsAreDropped(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
jobName := "my-job"
jobTarget1URL := "foo:9876"
jobTarget2URL := "foo:5432"
sdFile1Content := fmt.Sprintf(`[{"targets": ["%s"]}]`, jobTarget1URL)
sdFile2Content := fmt.Sprintf(`[{"targets": ["%s"]}]`, jobTarget2URL)
sDFile1 := writeIntoFile(t, sdFile1Content, "*targets.json")
sDFile2 := writeIntoFile(t, sdFile2Content, "*targets.json")
baseConfig := `
scrape_configs:
- job_name: %s
file_sd_configs:
- files: ['%s', '%s']
`
discoveryManager, scrapeManager := runManagers(t, ctx)
defer scrapeManager.Stop()
applyConfig(
t,
fmt.Sprintf(baseConfig, jobName, sDFile1.Name(), sDFile2.Name()),
scrapeManager,
discoveryManager,
)
// Make sure the job's targets are taken into account
requireTargets(
t,
scrapeManager,
jobName,
true,
[]string{
fmt.Sprintf("http://%s/metrics", jobTarget1URL),
fmt.Sprintf("http://%s/metrics", jobTarget2URL),
},
)
// Apply the same config for the same job but with a non existing file to make the provider
// unable to discover some targets
applyConfig(
t,
fmt.Sprintf(baseConfig, jobName, sDFile1.Name(), "/idontexistdoi.json"),
scrapeManager,
discoveryManager,
)
// The old target should get dropped
requireTargets(
t,
scrapeManager,
jobName,
false,
[]string{fmt.Sprintf("http://%s/metrics", jobTarget1URL)},
)
}
// TestProviderStaleTargetsAreDropped makes sure that when a job has only one provider and when that provider
// should no longer discover targets, the targets of that provider are dropped.
// See: https://github.com/prometheus/prometheus/issues/12858
func TestProviderStaleTargetsAreDropped(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
jobName := "my-job"
jobTargetURL := "foo:9876"
sdFileContent := fmt.Sprintf(`[{"targets": ["%s"]}]`, jobTargetURL)
sDFile := writeIntoFile(t, sdFileContent, "*targets.json")
baseConfig := `
scrape_configs:
- job_name: %s
file_sd_configs:
- files: ['%s']
`
discoveryManager, scrapeManager := runManagers(t, ctx)
defer scrapeManager.Stop()
applyConfig(
t,
fmt.Sprintf(baseConfig, jobName, sDFile.Name()),
scrapeManager,
discoveryManager,
)
// Make sure the job's targets are taken into account
requireTargets(
t,
scrapeManager,
jobName,
true,
[]string{
fmt.Sprintf("http://%s/metrics", jobTargetURL),
},
)
// Apply the same config for the same job but with a non existing file to make the provider
// unable to discover some targets
applyConfig(
t,
fmt.Sprintf(baseConfig, jobName, "/idontexistdoi.json"),
scrapeManager,
discoveryManager,
)
// The old target should get dropped
requireTargets(
t,
scrapeManager,
jobName,
false,
nil,
)
}
// TestOnlyStaleTargetsAreDropped makes sure that when a job has multiple providers, when one of them should no
// longer discover targets, only the stale targets of that provider are dropped.
func TestOnlyStaleTargetsAreDropped(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
myJob := "my-job"
myJobSDTargetURL := "my:9876"
myJobStaticTargetURL := "my:5432"
otherJob := "other-job"
otherJobTargetURL := "other:1234"
sdFileContent := fmt.Sprintf(`[{"targets": ["%s"]}]`, myJobSDTargetURL)
sDFile := writeIntoFile(t, sdFileContent, "*targets.json")
baseConfig := `
scrape_configs:
- job_name: %s
static_configs:
- targets: ['%s']
file_sd_configs:
- files: ['%s']
- job_name: %s
static_configs:
- targets: ['%s']
`
discoveryManager, scrapeManager := runManagers(t, ctx)
defer scrapeManager.Stop()
// Apply the initial config with an existing file
applyConfig(
t,
fmt.Sprintf(
baseConfig,
myJob,
myJobStaticTargetURL,
sDFile.Name(),
otherJob,
otherJobTargetURL,
),
scrapeManager,
discoveryManager,
)
// Make sure the jobs targets are taken into account
requireTargets(
t,
scrapeManager,
myJob,
true,
[]string{
fmt.Sprintf("http://%s/metrics", myJobSDTargetURL),
fmt.Sprintf("http://%s/metrics", myJobStaticTargetURL),
},
)
requireTargets(
t,
scrapeManager,
otherJob,
true,
[]string{fmt.Sprintf("http://%s/metrics", otherJobTargetURL)},
)
// Apply the same config with a non existing file for myJob
applyConfig(
t,
fmt.Sprintf(
baseConfig,
myJob,
myJobStaticTargetURL,
"/idontexistdoi.json",
otherJob,
otherJobTargetURL,
),
scrapeManager,
discoveryManager,
)
// Only the SD target should get dropped for myJob
requireTargets(
t,
scrapeManager,
myJob,
false,
[]string{
fmt.Sprintf("http://%s/metrics", myJobStaticTargetURL),
},
)
// The otherJob should keep its target
requireTargets(
t,
scrapeManager,
otherJob,
false,
[]string{fmt.Sprintf("http://%s/metrics", otherJobTargetURL)},
)
}
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