mirror of https://github.com/prometheus/prometheus
3595 lines
102 KiB
Go
3595 lines
102 KiB
Go
// Copyright 2016 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package scrape
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import (
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"bytes"
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"compress/gzip"
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"context"
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"encoding/binary"
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"errors"
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"fmt"
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"io"
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"math"
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"net/http"
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"net/http/httptest"
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"net/url"
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"strconv"
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"strings"
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"sync"
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"testing"
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"time"
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"github.com/go-kit/log"
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"github.com/gogo/protobuf/proto"
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"github.com/google/go-cmp/cmp"
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"github.com/prometheus/client_golang/prometheus"
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dto "github.com/prometheus/client_model/go"
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config_util "github.com/prometheus/common/config"
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"github.com/prometheus/common/model"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/discovery/targetgroup"
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"github.com/prometheus/prometheus/model/exemplar"
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"github.com/prometheus/prometheus/model/histogram"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/model/relabel"
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"github.com/prometheus/prometheus/model/textparse"
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"github.com/prometheus/prometheus/model/timestamp"
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"github.com/prometheus/prometheus/model/value"
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"github.com/prometheus/prometheus/storage"
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"github.com/prometheus/prometheus/tsdb/chunkenc"
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"github.com/prometheus/prometheus/util/pool"
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"github.com/prometheus/prometheus/util/teststorage"
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"github.com/prometheus/prometheus/util/testutil"
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)
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func TestMain(m *testing.M) {
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testutil.TolerantVerifyLeak(m)
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}
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func newTestScrapeMetrics(t testing.TB) *scrapeMetrics {
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reg := prometheus.NewRegistry()
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metrics, err := newScrapeMetrics(reg)
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require.NoError(t, err)
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return metrics
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}
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func TestNewScrapePool(t *testing.T) {
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var (
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app = &nopAppendable{}
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cfg = &config.ScrapeConfig{}
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sp, _ = newScrapePool(cfg, app, 0, nil, nil, &Options{}, newTestScrapeMetrics(t))
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)
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a, ok := sp.appendable.(*nopAppendable)
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require.True(t, ok, "Failure to append.")
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require.Equal(t, app, a, "Wrong sample appender.")
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require.Equal(t, cfg, sp.config, "Wrong scrape config.")
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require.NotNil(t, sp.newLoop, "newLoop function not initialized.")
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}
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func TestDroppedTargetsList(t *testing.T) {
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var (
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app = &nopAppendable{}
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cfg = &config.ScrapeConfig{
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JobName: "dropMe",
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ScrapeInterval: model.Duration(1),
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RelabelConfigs: []*relabel.Config{
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{
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Action: relabel.Drop,
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Regex: relabel.MustNewRegexp("dropMe"),
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SourceLabels: model.LabelNames{"job"},
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},
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},
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}
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tgs = []*targetgroup.Group{
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{
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Targets: []model.LabelSet{
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{model.AddressLabel: "127.0.0.1:9090"},
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{model.AddressLabel: "127.0.0.1:9091"},
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},
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},
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}
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sp, _ = newScrapePool(cfg, app, 0, nil, nil, &Options{}, newTestScrapeMetrics(t))
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expectedLabelSetString = "{__address__=\"127.0.0.1:9090\", __scrape_interval__=\"0s\", __scrape_timeout__=\"0s\", job=\"dropMe\"}"
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expectedLength = 2
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)
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sp.Sync(tgs)
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sp.Sync(tgs)
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require.Len(t, sp.droppedTargets, expectedLength)
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require.Equal(t, expectedLength, sp.droppedTargetsCount)
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require.Equal(t, expectedLabelSetString, sp.droppedTargets[0].DiscoveredLabels().String())
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// Check that count is still correct when we don't retain all dropped targets.
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sp.config.KeepDroppedTargets = 1
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sp.Sync(tgs)
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require.Len(t, sp.droppedTargets, 1)
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require.Equal(t, expectedLength, sp.droppedTargetsCount)
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}
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// TestDiscoveredLabelsUpdate checks that DiscoveredLabels are updated
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// even when new labels don't affect the target `hash`.
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func TestDiscoveredLabelsUpdate(t *testing.T) {
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sp := &scrapePool{
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metrics: newTestScrapeMetrics(t),
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}
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// These are used when syncing so need this to avoid a panic.
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sp.config = &config.ScrapeConfig{
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ScrapeInterval: model.Duration(1),
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ScrapeTimeout: model.Duration(1),
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}
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sp.activeTargets = make(map[uint64]*Target)
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t1 := &Target{
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discoveredLabels: labels.FromStrings("label", "name"),
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}
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sp.activeTargets[t1.hash()] = t1
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t2 := &Target{
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discoveredLabels: labels.FromStrings("labelNew", "nameNew"),
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}
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sp.sync([]*Target{t2})
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require.Equal(t, t2.DiscoveredLabels(), sp.activeTargets[t1.hash()].DiscoveredLabels())
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}
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type testLoop struct {
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startFunc func(interval, timeout time.Duration, errc chan<- error)
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stopFunc func()
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forcedErr error
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forcedErrMtx sync.Mutex
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runOnce bool
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interval time.Duration
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timeout time.Duration
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}
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func (l *testLoop) run(errc chan<- error) {
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if l.runOnce {
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panic("loop must be started only once")
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}
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l.runOnce = true
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l.startFunc(l.interval, l.timeout, errc)
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}
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func (l *testLoop) disableEndOfRunStalenessMarkers() {
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}
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func (l *testLoop) setForcedError(err error) {
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l.forcedErrMtx.Lock()
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defer l.forcedErrMtx.Unlock()
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l.forcedErr = err
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}
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func (l *testLoop) getForcedError() error {
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l.forcedErrMtx.Lock()
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defer l.forcedErrMtx.Unlock()
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return l.forcedErr
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}
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func (l *testLoop) stop() {
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l.stopFunc()
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}
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func (l *testLoop) getCache() *scrapeCache {
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return nil
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}
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func TestScrapePoolStop(t *testing.T) {
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sp := &scrapePool{
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activeTargets: map[uint64]*Target{},
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loops: map[uint64]loop{},
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cancel: func() {},
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client: http.DefaultClient,
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metrics: newTestScrapeMetrics(t),
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}
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var mtx sync.Mutex
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stopped := map[uint64]bool{}
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numTargets := 20
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// Stopping the scrape pool must call stop() on all scrape loops,
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// clean them and the respective targets up. It must wait until each loop's
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// stop function returned before returning itself.
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for i := 0; i < numTargets; i++ {
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t := &Target{
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labels: labels.FromStrings(model.AddressLabel, fmt.Sprintf("example.com:%d", i)),
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}
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l := &testLoop{}
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d := time.Duration((i+1)*20) * time.Millisecond
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l.stopFunc = func() {
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time.Sleep(d)
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mtx.Lock()
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stopped[t.hash()] = true
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mtx.Unlock()
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}
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sp.activeTargets[t.hash()] = t
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sp.loops[t.hash()] = l
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}
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done := make(chan struct{})
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stopTime := time.Now()
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go func() {
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sp.stop()
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close(done)
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}()
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select {
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case <-time.After(5 * time.Second):
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require.Fail(t, "scrapeLoop.stop() did not return as expected")
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case <-done:
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// This should have taken at least as long as the last target slept.
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require.GreaterOrEqual(t, time.Since(stopTime), time.Duration(numTargets*20)*time.Millisecond, "scrapeLoop.stop() exited before all targets stopped")
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}
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mtx.Lock()
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require.Len(t, stopped, numTargets, "Unexpected number of stopped loops")
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mtx.Unlock()
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require.Empty(t, sp.activeTargets, "Targets were not cleared on stopping: %d left", len(sp.activeTargets))
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require.Empty(t, sp.loops, "Loops were not cleared on stopping: %d left", len(sp.loops))
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}
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func TestScrapePoolReload(t *testing.T) {
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var mtx sync.Mutex
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numTargets := 20
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stopped := map[uint64]bool{}
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reloadCfg := &config.ScrapeConfig{
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ScrapeInterval: model.Duration(3 * time.Second),
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ScrapeTimeout: model.Duration(2 * time.Second),
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}
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// On starting to run, new loops created on reload check whether their preceding
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// equivalents have been stopped.
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newLoop := func(opts scrapeLoopOptions) loop {
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l := &testLoop{interval: time.Duration(reloadCfg.ScrapeInterval), timeout: time.Duration(reloadCfg.ScrapeTimeout)}
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l.startFunc = func(interval, timeout time.Duration, errc chan<- error) {
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require.Equal(t, 3*time.Second, interval, "Unexpected scrape interval")
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require.Equal(t, 2*time.Second, timeout, "Unexpected scrape timeout")
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mtx.Lock()
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targetScraper := opts.scraper.(*targetScraper)
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require.True(t, stopped[targetScraper.hash()], "Scrape loop for %v not stopped yet", targetScraper)
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mtx.Unlock()
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}
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return l
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}
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sp := &scrapePool{
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appendable: &nopAppendable{},
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activeTargets: map[uint64]*Target{},
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loops: map[uint64]loop{},
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newLoop: newLoop,
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logger: nil,
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client: http.DefaultClient,
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metrics: newTestScrapeMetrics(t),
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}
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// Reloading a scrape pool with a new scrape configuration must stop all scrape
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// loops and start new ones. A new loop must not be started before the preceding
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// one terminated.
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for i := 0; i < numTargets; i++ {
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labels := labels.FromStrings(model.AddressLabel, fmt.Sprintf("example.com:%d", i))
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t := &Target{
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labels: labels,
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discoveredLabels: labels,
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}
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l := &testLoop{}
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d := time.Duration((i+1)*20) * time.Millisecond
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l.stopFunc = func() {
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time.Sleep(d)
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mtx.Lock()
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stopped[t.hash()] = true
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mtx.Unlock()
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}
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sp.activeTargets[t.hash()] = t
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sp.loops[t.hash()] = l
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}
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done := make(chan struct{})
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beforeTargets := map[uint64]*Target{}
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for h, t := range sp.activeTargets {
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beforeTargets[h] = t
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}
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reloadTime := time.Now()
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go func() {
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sp.reload(reloadCfg)
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close(done)
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}()
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select {
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case <-time.After(5 * time.Second):
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require.FailNow(t, "scrapeLoop.reload() did not return as expected")
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case <-done:
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// This should have taken at least as long as the last target slept.
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require.GreaterOrEqual(t, time.Since(reloadTime), time.Duration(numTargets*20)*time.Millisecond, "scrapeLoop.stop() exited before all targets stopped")
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}
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mtx.Lock()
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require.Len(t, stopped, numTargets, "Unexpected number of stopped loops")
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mtx.Unlock()
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require.Equal(t, sp.activeTargets, beforeTargets, "Reloading affected target states unexpectedly")
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require.Len(t, sp.loops, numTargets, "Unexpected number of stopped loops after reload")
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}
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func TestScrapePoolReloadPreserveRelabeledIntervalTimeout(t *testing.T) {
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reloadCfg := &config.ScrapeConfig{
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ScrapeInterval: model.Duration(3 * time.Second),
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ScrapeTimeout: model.Duration(2 * time.Second),
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}
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newLoop := func(opts scrapeLoopOptions) loop {
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l := &testLoop{interval: opts.interval, timeout: opts.timeout}
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l.startFunc = func(interval, timeout time.Duration, errc chan<- error) {
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require.Equal(t, 5*time.Second, interval, "Unexpected scrape interval")
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require.Equal(t, 3*time.Second, timeout, "Unexpected scrape timeout")
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}
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return l
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}
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sp := &scrapePool{
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appendable: &nopAppendable{},
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activeTargets: map[uint64]*Target{
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1: {
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labels: labels.FromStrings(model.ScrapeIntervalLabel, "5s", model.ScrapeTimeoutLabel, "3s"),
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},
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},
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loops: map[uint64]loop{
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1: noopLoop(),
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},
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newLoop: newLoop,
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logger: nil,
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client: http.DefaultClient,
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metrics: newTestScrapeMetrics(t),
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}
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err := sp.reload(reloadCfg)
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if err != nil {
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t.Fatalf("unable to reload configuration: %s", err)
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}
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}
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func TestScrapePoolTargetLimit(t *testing.T) {
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var wg sync.WaitGroup
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// On starting to run, new loops created on reload check whether their preceding
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// equivalents have been stopped.
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newLoop := func(opts scrapeLoopOptions) loop {
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wg.Add(1)
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l := &testLoop{
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startFunc: func(interval, timeout time.Duration, errc chan<- error) {
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wg.Done()
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},
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stopFunc: func() {},
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}
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return l
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}
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sp := &scrapePool{
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appendable: &nopAppendable{},
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activeTargets: map[uint64]*Target{},
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loops: map[uint64]loop{},
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newLoop: newLoop,
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logger: log.NewNopLogger(),
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client: http.DefaultClient,
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metrics: newTestScrapeMetrics(t),
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}
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tgs := []*targetgroup.Group{}
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for i := 0; i < 50; i++ {
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tgs = append(tgs,
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&targetgroup.Group{
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Targets: []model.LabelSet{
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{model.AddressLabel: model.LabelValue(fmt.Sprintf("127.0.0.1:%d", 9090+i))},
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},
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},
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)
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}
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var limit uint
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reloadWithLimit := func(l uint) {
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limit = l
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require.NoError(t, sp.reload(&config.ScrapeConfig{
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ScrapeInterval: model.Duration(3 * time.Second),
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ScrapeTimeout: model.Duration(2 * time.Second),
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TargetLimit: l,
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}))
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}
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var targets int
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loadTargets := func(n int) {
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targets = n
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sp.Sync(tgs[:n])
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}
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validateIsRunning := func() {
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wg.Wait()
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for _, l := range sp.loops {
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require.True(t, l.(*testLoop).runOnce, "loop should be running")
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}
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}
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validateErrorMessage := func(shouldErr bool) {
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for _, l := range sp.loops {
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lerr := l.(*testLoop).getForcedError()
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if shouldErr {
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require.Error(t, lerr, "error was expected for %d targets with a limit of %d", targets, limit)
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require.Equal(t, fmt.Sprintf("target_limit exceeded (number of targets: %d, limit: %d)", targets, limit), lerr.Error())
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} else {
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require.NoError(t, lerr)
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}
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}
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}
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reloadWithLimit(0)
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loadTargets(50)
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validateIsRunning()
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// Simulate an initial config with a limit.
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sp.config.TargetLimit = 30
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limit = 30
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loadTargets(50)
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validateIsRunning()
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validateErrorMessage(true)
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reloadWithLimit(50)
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validateIsRunning()
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validateErrorMessage(false)
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reloadWithLimit(40)
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validateIsRunning()
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validateErrorMessage(true)
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loadTargets(30)
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validateIsRunning()
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validateErrorMessage(false)
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loadTargets(40)
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validateIsRunning()
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validateErrorMessage(false)
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loadTargets(41)
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validateIsRunning()
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validateErrorMessage(true)
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reloadWithLimit(0)
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validateIsRunning()
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validateErrorMessage(false)
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reloadWithLimit(51)
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validateIsRunning()
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validateErrorMessage(false)
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tgs = append(tgs,
|
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&targetgroup.Group{
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Targets: []model.LabelSet{
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{model.AddressLabel: model.LabelValue("127.0.0.1:1090")},
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},
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},
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&targetgroup.Group{
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Targets: []model.LabelSet{
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{model.AddressLabel: model.LabelValue("127.0.0.1:1090")},
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},
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},
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)
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sp.Sync(tgs)
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validateIsRunning()
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validateErrorMessage(false)
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}
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|
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func TestScrapePoolAppender(t *testing.T) {
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cfg := &config.ScrapeConfig{}
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app := &nopAppendable{}
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sp, _ := newScrapePool(cfg, app, 0, nil, nil, &Options{}, newTestScrapeMetrics(t))
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|
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loop := sp.newLoop(scrapeLoopOptions{
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target: &Target{},
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})
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appl, ok := loop.(*scrapeLoop)
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require.True(t, ok, "Expected scrapeLoop but got %T", loop)
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wrapped := appender(appl.appender(context.Background()), 0, 0, nativeHistogramMaxSchema)
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tl, ok := wrapped.(*timeLimitAppender)
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require.True(t, ok, "Expected timeLimitAppender but got %T", wrapped)
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_, ok = tl.Appender.(nopAppender)
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require.True(t, ok, "Expected base appender but got %T", tl.Appender)
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|
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sampleLimit := 100
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loop = sp.newLoop(scrapeLoopOptions{
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target: &Target{},
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sampleLimit: sampleLimit,
|
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})
|
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appl, ok = loop.(*scrapeLoop)
|
|
require.True(t, ok, "Expected scrapeLoop but got %T", loop)
|
|
|
|
wrapped = appender(appl.appender(context.Background()), sampleLimit, 0, nativeHistogramMaxSchema)
|
|
|
|
sl, ok := wrapped.(*limitAppender)
|
|
require.True(t, ok, "Expected limitAppender but got %T", wrapped)
|
|
|
|
tl, ok = sl.Appender.(*timeLimitAppender)
|
|
require.True(t, ok, "Expected timeLimitAppender but got %T", sl.Appender)
|
|
|
|
_, ok = tl.Appender.(nopAppender)
|
|
require.True(t, ok, "Expected base appender but got %T", tl.Appender)
|
|
|
|
wrapped = appender(appl.appender(context.Background()), sampleLimit, 100, nativeHistogramMaxSchema)
|
|
|
|
bl, ok := wrapped.(*bucketLimitAppender)
|
|
require.True(t, ok, "Expected bucketLimitAppender but got %T", wrapped)
|
|
|
|
sl, ok = bl.Appender.(*limitAppender)
|
|
require.True(t, ok, "Expected limitAppender but got %T", bl)
|
|
|
|
tl, ok = sl.Appender.(*timeLimitAppender)
|
|
require.True(t, ok, "Expected timeLimitAppender but got %T", sl.Appender)
|
|
|
|
_, ok = tl.Appender.(nopAppender)
|
|
require.True(t, ok, "Expected base appender but got %T", tl.Appender)
|
|
|
|
wrapped = appender(appl.appender(context.Background()), sampleLimit, 100, 0)
|
|
|
|
ml, ok := wrapped.(*maxSchemaAppender)
|
|
require.True(t, ok, "Expected maxSchemaAppender but got %T", wrapped)
|
|
|
|
bl, ok = ml.Appender.(*bucketLimitAppender)
|
|
require.True(t, ok, "Expected bucketLimitAppender but got %T", wrapped)
|
|
|
|
sl, ok = bl.Appender.(*limitAppender)
|
|
require.True(t, ok, "Expected limitAppender but got %T", bl)
|
|
|
|
tl, ok = sl.Appender.(*timeLimitAppender)
|
|
require.True(t, ok, "Expected timeLimitAppender but got %T", sl.Appender)
|
|
|
|
_, ok = tl.Appender.(nopAppender)
|
|
require.True(t, ok, "Expected base appender but got %T", tl.Appender)
|
|
}
|
|
|
|
func TestScrapePoolRaces(t *testing.T) {
|
|
interval, _ := model.ParseDuration("1s")
|
|
timeout, _ := model.ParseDuration("500ms")
|
|
newConfig := func() *config.ScrapeConfig {
|
|
return &config.ScrapeConfig{ScrapeInterval: interval, ScrapeTimeout: timeout}
|
|
}
|
|
sp, _ := newScrapePool(newConfig(), &nopAppendable{}, 0, nil, nil, &Options{}, newTestScrapeMetrics(t))
|
|
tgts := []*targetgroup.Group{
|
|
{
|
|
Targets: []model.LabelSet{
|
|
{model.AddressLabel: "127.0.0.1:9090"},
|
|
{model.AddressLabel: "127.0.0.2:9090"},
|
|
{model.AddressLabel: "127.0.0.3:9090"},
|
|
{model.AddressLabel: "127.0.0.4:9090"},
|
|
{model.AddressLabel: "127.0.0.5:9090"},
|
|
{model.AddressLabel: "127.0.0.6:9090"},
|
|
{model.AddressLabel: "127.0.0.7:9090"},
|
|
{model.AddressLabel: "127.0.0.8:9090"},
|
|
},
|
|
},
|
|
}
|
|
|
|
sp.Sync(tgts)
|
|
active := sp.ActiveTargets()
|
|
dropped := sp.DroppedTargets()
|
|
expectedActive, expectedDropped := len(tgts[0].Targets), 0
|
|
|
|
require.Len(t, active, expectedActive, "Invalid number of active targets")
|
|
require.Len(t, dropped, expectedDropped, "Invalid number of dropped targets")
|
|
|
|
for i := 0; i < 20; i++ {
|
|
time.Sleep(10 * time.Millisecond)
|
|
sp.reload(newConfig())
|
|
}
|
|
sp.stop()
|
|
}
|
|
|
|
func TestScrapePoolScrapeLoopsStarted(t *testing.T) {
|
|
var wg sync.WaitGroup
|
|
newLoop := func(opts scrapeLoopOptions) loop {
|
|
wg.Add(1)
|
|
l := &testLoop{
|
|
startFunc: func(interval, timeout time.Duration, errc chan<- error) {
|
|
wg.Done()
|
|
},
|
|
stopFunc: func() {},
|
|
}
|
|
return l
|
|
}
|
|
sp := &scrapePool{
|
|
appendable: &nopAppendable{},
|
|
activeTargets: map[uint64]*Target{},
|
|
loops: map[uint64]loop{},
|
|
newLoop: newLoop,
|
|
logger: nil,
|
|
client: http.DefaultClient,
|
|
metrics: newTestScrapeMetrics(t),
|
|
}
|
|
|
|
tgs := []*targetgroup.Group{
|
|
{
|
|
Targets: []model.LabelSet{
|
|
{model.AddressLabel: model.LabelValue("127.0.0.1:9090")},
|
|
},
|
|
},
|
|
{
|
|
Targets: []model.LabelSet{
|
|
{model.AddressLabel: model.LabelValue("127.0.0.1:9090")},
|
|
},
|
|
},
|
|
}
|
|
|
|
require.NoError(t, sp.reload(&config.ScrapeConfig{
|
|
ScrapeInterval: model.Duration(3 * time.Second),
|
|
ScrapeTimeout: model.Duration(2 * time.Second),
|
|
}))
|
|
sp.Sync(tgs)
|
|
|
|
require.Len(t, sp.loops, 1)
|
|
|
|
wg.Wait()
|
|
for _, l := range sp.loops {
|
|
require.True(t, l.(*testLoop).runOnce, "loop should be running")
|
|
}
|
|
}
|
|
|
|
func newBasicScrapeLoop(t testing.TB, ctx context.Context, scraper scraper, app func(ctx context.Context) storage.Appender, interval time.Duration) *scrapeLoop {
|
|
return newScrapeLoop(ctx,
|
|
scraper,
|
|
nil, nil,
|
|
nopMutator,
|
|
nopMutator,
|
|
app,
|
|
nil,
|
|
0,
|
|
true,
|
|
false,
|
|
true,
|
|
0, 0, nativeHistogramMaxSchema,
|
|
nil,
|
|
interval,
|
|
time.Hour,
|
|
false,
|
|
false,
|
|
false,
|
|
false,
|
|
nil,
|
|
false,
|
|
newTestScrapeMetrics(t),
|
|
false,
|
|
)
|
|
}
|
|
|
|
func TestScrapeLoopStopBeforeRun(t *testing.T) {
|
|
scraper := &testScraper{}
|
|
sl := newBasicScrapeLoop(t, context.Background(), scraper, nil, 1)
|
|
|
|
// The scrape pool synchronizes on stopping scrape loops. However, new scrape
|
|
// loops are started asynchronously. Thus it's possible, that a loop is stopped
|
|
// again before having started properly.
|
|
// Stopping not-yet-started loops must block until the run method was called and exited.
|
|
// The run method must exit immediately.
|
|
|
|
stopDone := make(chan struct{})
|
|
go func() {
|
|
sl.stop()
|
|
close(stopDone)
|
|
}()
|
|
|
|
select {
|
|
case <-stopDone:
|
|
require.FailNow(t, "Stopping terminated before run exited successfully.")
|
|
case <-time.After(500 * time.Millisecond):
|
|
}
|
|
|
|
// Running the scrape loop must exit before calling the scraper even once.
|
|
scraper.scrapeFunc = func(context.Context, io.Writer) error {
|
|
require.FailNow(t, "Scraper was called for terminated scrape loop.")
|
|
return nil
|
|
}
|
|
|
|
runDone := make(chan struct{})
|
|
go func() {
|
|
sl.run(nil)
|
|
close(runDone)
|
|
}()
|
|
|
|
select {
|
|
case <-runDone:
|
|
case <-time.After(1 * time.Second):
|
|
require.FailNow(t, "Running terminated scrape loop did not exit.")
|
|
}
|
|
|
|
select {
|
|
case <-stopDone:
|
|
case <-time.After(1 * time.Second):
|
|
require.FailNow(t, "Stopping did not terminate after running exited.")
|
|
}
|
|
}
|
|
|
|
func nopMutator(l labels.Labels) labels.Labels { return l }
|
|
|
|
func TestScrapeLoopStop(t *testing.T) {
|
|
var (
|
|
signal = make(chan struct{}, 1)
|
|
appender = &collectResultAppender{}
|
|
scraper = &testScraper{}
|
|
app = func(ctx context.Context) storage.Appender { return appender }
|
|
)
|
|
|
|
sl := newBasicScrapeLoop(t, context.Background(), scraper, app, 10*time.Millisecond)
|
|
|
|
// Terminate loop after 2 scrapes.
|
|
numScrapes := 0
|
|
|
|
scraper.scrapeFunc = func(ctx context.Context, w io.Writer) error {
|
|
numScrapes++
|
|
if numScrapes == 2 {
|
|
go sl.stop()
|
|
<-sl.ctx.Done()
|
|
}
|
|
w.Write([]byte("metric_a 42\n"))
|
|
return ctx.Err()
|
|
}
|
|
|
|
go func() {
|
|
sl.run(nil)
|
|
signal <- struct{}{}
|
|
}()
|
|
|
|
select {
|
|
case <-signal:
|
|
case <-time.After(5 * time.Second):
|
|
require.FailNow(t, "Scrape wasn't stopped.")
|
|
}
|
|
|
|
// We expected 1 actual sample for each scrape plus 5 for report samples.
|
|
// At least 2 scrapes were made, plus the final stale markers.
|
|
require.GreaterOrEqual(t, len(appender.resultFloats), 6*3, "Expected at least 3 scrapes with 6 samples each.")
|
|
require.Zero(t, len(appender.resultFloats)%6, "There is a scrape with missing samples.")
|
|
// All samples in a scrape must have the same timestamp.
|
|
var ts int64
|
|
for i, s := range appender.resultFloats {
|
|
switch {
|
|
case i%6 == 0:
|
|
ts = s.t
|
|
case s.t != ts:
|
|
t.Fatalf("Unexpected multiple timestamps within single scrape")
|
|
}
|
|
}
|
|
// All samples from the last scrape must be stale markers.
|
|
for _, s := range appender.resultFloats[len(appender.resultFloats)-5:] {
|
|
require.True(t, value.IsStaleNaN(s.f), "Appended last sample not as expected. Wanted: stale NaN Got: %x", math.Float64bits(s.f))
|
|
}
|
|
}
|
|
|
|
func TestScrapeLoopRun(t *testing.T) {
|
|
var (
|
|
signal = make(chan struct{}, 1)
|
|
errc = make(chan error)
|
|
|
|
scraper = &testScraper{}
|
|
app = func(ctx context.Context) storage.Appender { return &nopAppender{} }
|
|
scrapeMetrics = newTestScrapeMetrics(t)
|
|
)
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newScrapeLoop(ctx,
|
|
scraper,
|
|
nil, nil,
|
|
nopMutator,
|
|
nopMutator,
|
|
app,
|
|
nil,
|
|
0,
|
|
true,
|
|
false,
|
|
true,
|
|
0, 0, nativeHistogramMaxSchema,
|
|
nil,
|
|
time.Second,
|
|
time.Hour,
|
|
false,
|
|
false,
|
|
false,
|
|
false,
|
|
nil,
|
|
false,
|
|
scrapeMetrics,
|
|
false,
|
|
)
|
|
|
|
// The loop must terminate during the initial offset if the context
|
|
// is canceled.
|
|
scraper.offsetDur = time.Hour
|
|
|
|
go func() {
|
|
sl.run(errc)
|
|
signal <- struct{}{}
|
|
}()
|
|
|
|
// Wait to make sure we are actually waiting on the offset.
|
|
time.Sleep(1 * time.Second)
|
|
|
|
cancel()
|
|
select {
|
|
case <-signal:
|
|
case <-time.After(5 * time.Second):
|
|
require.FailNow(t, "Cancellation during initial offset failed.")
|
|
case err := <-errc:
|
|
require.FailNow(t, "Unexpected error: %s", err)
|
|
}
|
|
|
|
// The provided timeout must cause cancellation of the context passed down to the
|
|
// scraper. The scraper has to respect the context.
|
|
scraper.offsetDur = 0
|
|
|
|
block := make(chan struct{})
|
|
scraper.scrapeFunc = func(ctx context.Context, _ io.Writer) error {
|
|
select {
|
|
case <-block:
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
ctx, cancel = context.WithCancel(context.Background())
|
|
sl = newBasicScrapeLoop(t, ctx, scraper, app, time.Second)
|
|
sl.timeout = 100 * time.Millisecond
|
|
|
|
go func() {
|
|
sl.run(errc)
|
|
signal <- struct{}{}
|
|
}()
|
|
|
|
select {
|
|
case err := <-errc:
|
|
require.ErrorIs(t, err, context.DeadlineExceeded)
|
|
case <-time.After(3 * time.Second):
|
|
require.FailNow(t, "Expected timeout error but got none.")
|
|
}
|
|
|
|
// We already caught the timeout error and are certainly in the loop.
|
|
// Let the scrapes returns immediately to cause no further timeout errors
|
|
// and check whether canceling the parent context terminates the loop.
|
|
close(block)
|
|
cancel()
|
|
|
|
select {
|
|
case <-signal:
|
|
// Loop terminated as expected.
|
|
case err := <-errc:
|
|
require.FailNow(t, "Unexpected error: %s", err)
|
|
case <-time.After(3 * time.Second):
|
|
require.FailNow(t, "Loop did not terminate on context cancellation")
|
|
}
|
|
}
|
|
|
|
func TestScrapeLoopForcedErr(t *testing.T) {
|
|
var (
|
|
signal = make(chan struct{}, 1)
|
|
errc = make(chan error)
|
|
|
|
scraper = &testScraper{}
|
|
app = func(ctx context.Context) storage.Appender { return &nopAppender{} }
|
|
)
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, ctx, scraper, app, time.Second)
|
|
|
|
forcedErr := fmt.Errorf("forced err")
|
|
sl.setForcedError(forcedErr)
|
|
|
|
scraper.scrapeFunc = func(context.Context, io.Writer) error {
|
|
require.FailNow(t, "Should not be scraped.")
|
|
return nil
|
|
}
|
|
|
|
go func() {
|
|
sl.run(errc)
|
|
signal <- struct{}{}
|
|
}()
|
|
|
|
select {
|
|
case err := <-errc:
|
|
require.ErrorIs(t, err, forcedErr)
|
|
case <-time.After(3 * time.Second):
|
|
require.FailNow(t, "Expected forced error but got none.")
|
|
}
|
|
cancel()
|
|
|
|
select {
|
|
case <-signal:
|
|
case <-time.After(5 * time.Second):
|
|
require.FailNow(t, "Scrape not stopped.")
|
|
}
|
|
}
|
|
|
|
func TestScrapeLoopMetadata(t *testing.T) {
|
|
var (
|
|
signal = make(chan struct{})
|
|
scraper = &testScraper{}
|
|
scrapeMetrics = newTestScrapeMetrics(t)
|
|
cache = newScrapeCache(scrapeMetrics)
|
|
)
|
|
defer close(signal)
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newScrapeLoop(ctx,
|
|
scraper,
|
|
nil, nil,
|
|
nopMutator,
|
|
nopMutator,
|
|
func(ctx context.Context) storage.Appender { return nopAppender{} },
|
|
cache,
|
|
0,
|
|
true,
|
|
false,
|
|
true,
|
|
0, 0, nativeHistogramMaxSchema,
|
|
nil,
|
|
0,
|
|
0,
|
|
false,
|
|
false,
|
|
false,
|
|
false,
|
|
nil,
|
|
false,
|
|
scrapeMetrics,
|
|
false,
|
|
)
|
|
defer cancel()
|
|
|
|
slApp := sl.appender(ctx)
|
|
total, _, _, err := sl.append(slApp, []byte(`# TYPE test_metric counter
|
|
# HELP test_metric some help text
|
|
# UNIT test_metric metric
|
|
test_metric 1
|
|
# TYPE test_metric_no_help gauge
|
|
# HELP test_metric_no_type other help text
|
|
# EOF`), "application/openmetrics-text", time.Now())
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
require.Equal(t, 1, total)
|
|
|
|
md, ok := cache.GetMetadata("test_metric")
|
|
require.True(t, ok, "expected metadata to be present")
|
|
require.Equal(t, model.MetricTypeCounter, md.Type, "unexpected metric type")
|
|
require.Equal(t, "some help text", md.Help)
|
|
require.Equal(t, "metric", md.Unit)
|
|
|
|
md, ok = cache.GetMetadata("test_metric_no_help")
|
|
require.True(t, ok, "expected metadata to be present")
|
|
require.Equal(t, model.MetricTypeGauge, md.Type, "unexpected metric type")
|
|
require.Equal(t, "", md.Help)
|
|
require.Equal(t, "", md.Unit)
|
|
|
|
md, ok = cache.GetMetadata("test_metric_no_type")
|
|
require.True(t, ok, "expected metadata to be present")
|
|
require.Equal(t, model.MetricTypeUnknown, md.Type, "unexpected metric type")
|
|
require.Equal(t, "other help text", md.Help)
|
|
require.Equal(t, "", md.Unit)
|
|
}
|
|
|
|
func simpleTestScrapeLoop(t testing.TB) (context.Context, *scrapeLoop) {
|
|
// Need a full storage for correct Add/AddFast semantics.
|
|
s := teststorage.New(t)
|
|
t.Cleanup(func() { s.Close() })
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, ctx, &testScraper{}, s.Appender, 0)
|
|
t.Cleanup(func() { cancel() })
|
|
|
|
return ctx, sl
|
|
}
|
|
|
|
func TestScrapeLoopSeriesAdded(t *testing.T) {
|
|
ctx, sl := simpleTestScrapeLoop(t)
|
|
|
|
slApp := sl.appender(ctx)
|
|
total, added, seriesAdded, err := sl.append(slApp, []byte("test_metric 1\n"), "", time.Time{})
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
require.Equal(t, 1, total)
|
|
require.Equal(t, 1, added)
|
|
require.Equal(t, 1, seriesAdded)
|
|
|
|
slApp = sl.appender(ctx)
|
|
total, added, seriesAdded, err = sl.append(slApp, []byte("test_metric 1\n"), "", time.Time{})
|
|
require.NoError(t, slApp.Commit())
|
|
require.NoError(t, err)
|
|
require.Equal(t, 1, total)
|
|
require.Equal(t, 1, added)
|
|
require.Equal(t, 0, seriesAdded)
|
|
}
|
|
|
|
func TestScrapeLoopFailWithInvalidLabelsAfterRelabel(t *testing.T) {
|
|
s := teststorage.New(t)
|
|
defer s.Close()
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
|
|
target := &Target{
|
|
labels: labels.FromStrings("pod_label_invalid_012", "test"),
|
|
}
|
|
relabelConfig := []*relabel.Config{{
|
|
Action: relabel.LabelMap,
|
|
Regex: relabel.MustNewRegexp("pod_label_invalid_(.+)"),
|
|
Separator: ";",
|
|
Replacement: "$1",
|
|
}}
|
|
sl := newBasicScrapeLoop(t, ctx, &testScraper{}, s.Appender, 0)
|
|
sl.sampleMutator = func(l labels.Labels) labels.Labels {
|
|
return mutateSampleLabels(l, target, true, relabelConfig)
|
|
}
|
|
|
|
slApp := sl.appender(ctx)
|
|
total, added, seriesAdded, err := sl.append(slApp, []byte("test_metric 1\n"), "", time.Time{})
|
|
require.ErrorContains(t, err, "invalid metric name or label names")
|
|
require.NoError(t, slApp.Rollback())
|
|
require.Equal(t, 1, total)
|
|
require.Equal(t, 0, added)
|
|
require.Equal(t, 0, seriesAdded)
|
|
}
|
|
|
|
func makeTestMetrics(n int) []byte {
|
|
// Construct a metrics string to parse
|
|
sb := bytes.Buffer{}
|
|
for i := 0; i < n; i++ {
|
|
fmt.Fprintf(&sb, "# TYPE metric_a gauge\n")
|
|
fmt.Fprintf(&sb, "# HELP metric_a help text\n")
|
|
fmt.Fprintf(&sb, "metric_a{foo=\"%d\",bar=\"%d\"} 1\n", i, i*100)
|
|
}
|
|
return sb.Bytes()
|
|
}
|
|
|
|
func BenchmarkScrapeLoopAppend(b *testing.B) {
|
|
ctx, sl := simpleTestScrapeLoop(b)
|
|
|
|
slApp := sl.appender(ctx)
|
|
metrics := makeTestMetrics(100)
|
|
ts := time.Time{}
|
|
|
|
b.ResetTimer()
|
|
|
|
for i := 0; i < b.N; i++ {
|
|
ts = ts.Add(time.Second)
|
|
_, _, _, _ = sl.append(slApp, metrics, "", ts)
|
|
}
|
|
}
|
|
|
|
func BenchmarkScrapeLoopAppendOM(b *testing.B) {
|
|
ctx, sl := simpleTestScrapeLoop(b)
|
|
|
|
slApp := sl.appender(ctx)
|
|
metrics := makeTestMetrics(100)
|
|
ts := time.Time{}
|
|
|
|
b.ResetTimer()
|
|
|
|
for i := 0; i < b.N; i++ {
|
|
ts = ts.Add(time.Second)
|
|
_, _, _, _ = sl.append(slApp, metrics, "application/openmetrics-text", ts)
|
|
}
|
|
}
|
|
|
|
func TestScrapeLoopRunCreatesStaleMarkersOnFailedScrape(t *testing.T) {
|
|
appender := &collectResultAppender{}
|
|
var (
|
|
signal = make(chan struct{}, 1)
|
|
scraper = &testScraper{}
|
|
app = func(ctx context.Context) storage.Appender { return appender }
|
|
)
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, ctx, scraper, app, 10*time.Millisecond)
|
|
// Succeed once, several failures, then stop.
|
|
numScrapes := 0
|
|
|
|
scraper.scrapeFunc = func(ctx context.Context, w io.Writer) error {
|
|
numScrapes++
|
|
|
|
switch numScrapes {
|
|
case 1:
|
|
w.Write([]byte("metric_a 42\n"))
|
|
return nil
|
|
case 5:
|
|
cancel()
|
|
}
|
|
return errors.New("scrape failed")
|
|
}
|
|
|
|
go func() {
|
|
sl.run(nil)
|
|
signal <- struct{}{}
|
|
}()
|
|
|
|
select {
|
|
case <-signal:
|
|
case <-time.After(5 * time.Second):
|
|
require.FailNow(t, "Scrape wasn't stopped.")
|
|
}
|
|
|
|
// 1 successfully scraped sample, 1 stale marker after first fail, 5 report samples for
|
|
// each scrape successful or not.
|
|
require.Len(t, appender.resultFloats, 27, "Appended samples not as expected:\n%s", appender)
|
|
require.Equal(t, 42.0, appender.resultFloats[0].f, "Appended first sample not as expected")
|
|
require.True(t, value.IsStaleNaN(appender.resultFloats[6].f),
|
|
"Appended second sample not as expected. Wanted: stale NaN Got: %x", math.Float64bits(appender.resultFloats[6].f))
|
|
}
|
|
|
|
func TestScrapeLoopRunCreatesStaleMarkersOnParseFailure(t *testing.T) {
|
|
appender := &collectResultAppender{}
|
|
var (
|
|
signal = make(chan struct{}, 1)
|
|
scraper = &testScraper{}
|
|
app = func(ctx context.Context) storage.Appender { return appender }
|
|
numScrapes = 0
|
|
)
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, ctx, scraper, app, 10*time.Millisecond)
|
|
|
|
// Succeed once, several failures, then stop.
|
|
scraper.scrapeFunc = func(ctx context.Context, w io.Writer) error {
|
|
numScrapes++
|
|
switch numScrapes {
|
|
case 1:
|
|
w.Write([]byte("metric_a 42\n"))
|
|
return nil
|
|
case 2:
|
|
w.Write([]byte("7&-\n"))
|
|
return nil
|
|
case 3:
|
|
cancel()
|
|
}
|
|
return errors.New("scrape failed")
|
|
}
|
|
|
|
go func() {
|
|
sl.run(nil)
|
|
signal <- struct{}{}
|
|
}()
|
|
|
|
select {
|
|
case <-signal:
|
|
case <-time.After(5 * time.Second):
|
|
require.FailNow(t, "Scrape wasn't stopped.")
|
|
}
|
|
|
|
// 1 successfully scraped sample, 1 stale marker after first fail, 5 report samples for
|
|
// each scrape successful or not.
|
|
require.Len(t, appender.resultFloats, 17, "Appended samples not as expected:\n%s", appender)
|
|
require.Equal(t, 42.0, appender.resultFloats[0].f, "Appended first sample not as expected")
|
|
require.True(t, value.IsStaleNaN(appender.resultFloats[6].f),
|
|
"Appended second sample not as expected. Wanted: stale NaN Got: %x", math.Float64bits(appender.resultFloats[6].f))
|
|
}
|
|
|
|
func TestScrapeLoopCache(t *testing.T) {
|
|
s := teststorage.New(t)
|
|
defer s.Close()
|
|
|
|
appender := &collectResultAppender{}
|
|
var (
|
|
signal = make(chan struct{}, 1)
|
|
scraper = &testScraper{}
|
|
app = func(ctx context.Context) storage.Appender { appender.next = s.Appender(ctx); return appender }
|
|
)
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
// Decreasing the scrape interval could make the test fail, as multiple scrapes might be initiated at identical millisecond timestamps.
|
|
// See https://github.com/prometheus/prometheus/issues/12727.
|
|
sl := newBasicScrapeLoop(t, ctx, scraper, app, 100*time.Millisecond)
|
|
|
|
numScrapes := 0
|
|
|
|
scraper.scrapeFunc = func(ctx context.Context, w io.Writer) error {
|
|
switch numScrapes {
|
|
case 1, 2:
|
|
_, ok := sl.cache.series["metric_a"]
|
|
require.True(t, ok, "metric_a missing from cache after scrape %d", numScrapes)
|
|
_, ok = sl.cache.series["metric_b"]
|
|
require.True(t, ok, "metric_b missing from cache after scrape %d", numScrapes)
|
|
case 3:
|
|
_, ok := sl.cache.series["metric_a"]
|
|
require.True(t, ok, "metric_a missing from cache after scrape %d", numScrapes)
|
|
_, ok = sl.cache.series["metric_b"]
|
|
require.False(t, ok, "metric_b present in cache after scrape %d", numScrapes)
|
|
}
|
|
|
|
numScrapes++
|
|
switch numScrapes {
|
|
case 1:
|
|
w.Write([]byte("metric_a 42\nmetric_b 43\n"))
|
|
return nil
|
|
case 3:
|
|
w.Write([]byte("metric_a 44\n"))
|
|
return nil
|
|
case 4:
|
|
cancel()
|
|
}
|
|
return fmt.Errorf("scrape failed")
|
|
}
|
|
|
|
go func() {
|
|
sl.run(nil)
|
|
signal <- struct{}{}
|
|
}()
|
|
|
|
select {
|
|
case <-signal:
|
|
case <-time.After(5 * time.Second):
|
|
require.FailNow(t, "Scrape wasn't stopped.")
|
|
}
|
|
|
|
// 1 successfully scraped sample, 1 stale marker after first fail, 5 report samples for
|
|
// each scrape successful or not.
|
|
require.Len(t, appender.resultFloats, 26, "Appended samples not as expected:\n%s", appender)
|
|
}
|
|
|
|
func TestScrapeLoopCacheMemoryExhaustionProtection(t *testing.T) {
|
|
s := teststorage.New(t)
|
|
defer s.Close()
|
|
|
|
sapp := s.Appender(context.Background())
|
|
|
|
appender := &collectResultAppender{next: sapp}
|
|
var (
|
|
signal = make(chan struct{}, 1)
|
|
scraper = &testScraper{}
|
|
app = func(ctx context.Context) storage.Appender { return appender }
|
|
)
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, ctx, scraper, app, 10*time.Millisecond)
|
|
|
|
numScrapes := 0
|
|
|
|
scraper.scrapeFunc = func(ctx context.Context, w io.Writer) error {
|
|
numScrapes++
|
|
if numScrapes < 5 {
|
|
s := ""
|
|
for i := 0; i < 500; i++ {
|
|
s = fmt.Sprintf("%smetric_%d_%d 42\n", s, i, numScrapes)
|
|
}
|
|
w.Write([]byte(fmt.Sprintf(s + "&")))
|
|
} else {
|
|
cancel()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
go func() {
|
|
sl.run(nil)
|
|
signal <- struct{}{}
|
|
}()
|
|
|
|
select {
|
|
case <-signal:
|
|
case <-time.After(5 * time.Second):
|
|
require.FailNow(t, "Scrape wasn't stopped.")
|
|
}
|
|
|
|
require.LessOrEqual(t, len(sl.cache.series), 2000, "More than 2000 series cached.")
|
|
}
|
|
|
|
func TestScrapeLoopAppend(t *testing.T) {
|
|
tests := []struct {
|
|
title string
|
|
honorLabels bool
|
|
scrapeLabels string
|
|
discoveryLabels []string
|
|
expLset labels.Labels
|
|
expValue float64
|
|
}{
|
|
{
|
|
// When "honor_labels" is not set
|
|
// label name collision is handler by adding a prefix.
|
|
title: "Label name collision",
|
|
honorLabels: false,
|
|
scrapeLabels: `metric{n="1"} 0`,
|
|
discoveryLabels: []string{"n", "2"},
|
|
expLset: labels.FromStrings("__name__", "metric", "exported_n", "1", "n", "2"),
|
|
expValue: 0,
|
|
}, {
|
|
// When "honor_labels" is not set
|
|
// exported label from discovery don't get overwritten
|
|
title: "Label name collision",
|
|
honorLabels: false,
|
|
scrapeLabels: `metric 0`,
|
|
discoveryLabels: []string{"n", "2", "exported_n", "2"},
|
|
expLset: labels.FromStrings("__name__", "metric", "n", "2", "exported_n", "2"),
|
|
expValue: 0,
|
|
}, {
|
|
// Labels with no value need to be removed as these should not be ingested.
|
|
title: "Delete Empty labels",
|
|
honorLabels: false,
|
|
scrapeLabels: `metric{n=""} 0`,
|
|
discoveryLabels: nil,
|
|
expLset: labels.FromStrings("__name__", "metric"),
|
|
expValue: 0,
|
|
}, {
|
|
// Honor Labels should ignore labels with the same name.
|
|
title: "Honor Labels",
|
|
honorLabels: true,
|
|
scrapeLabels: `metric{n1="1", n2="2"} 0`,
|
|
discoveryLabels: []string{"n1", "0"},
|
|
expLset: labels.FromStrings("__name__", "metric", "n1", "1", "n2", "2"),
|
|
expValue: 0,
|
|
}, {
|
|
title: "Stale - NaN",
|
|
honorLabels: false,
|
|
scrapeLabels: `metric NaN`,
|
|
discoveryLabels: nil,
|
|
expLset: labels.FromStrings("__name__", "metric"),
|
|
expValue: math.Float64frombits(value.NormalNaN),
|
|
},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
app := &collectResultAppender{}
|
|
|
|
discoveryLabels := &Target{
|
|
labels: labels.FromStrings(test.discoveryLabels...),
|
|
}
|
|
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
sl.sampleMutator = func(l labels.Labels) labels.Labels {
|
|
return mutateSampleLabels(l, discoveryLabels, test.honorLabels, nil)
|
|
}
|
|
sl.reportSampleMutator = func(l labels.Labels) labels.Labels {
|
|
return mutateReportSampleLabels(l, discoveryLabels)
|
|
}
|
|
|
|
now := time.Now()
|
|
|
|
slApp := sl.appender(context.Background())
|
|
_, _, _, err := sl.append(slApp, []byte(test.scrapeLabels), "", now)
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
expected := []floatSample{
|
|
{
|
|
metric: test.expLset,
|
|
t: timestamp.FromTime(now),
|
|
f: test.expValue,
|
|
},
|
|
}
|
|
|
|
t.Logf("Test:%s", test.title)
|
|
requireEqual(t, expected, app.resultFloats)
|
|
}
|
|
}
|
|
|
|
func requireEqual(t *testing.T, expected, actual interface{}, msgAndArgs ...interface{}) {
|
|
testutil.RequireEqualWithOptions(t, expected, actual,
|
|
[]cmp.Option{cmp.Comparer(equalFloatSamples), cmp.AllowUnexported(histogramSample{})},
|
|
msgAndArgs...)
|
|
}
|
|
|
|
func TestScrapeLoopAppendForConflictingPrefixedLabels(t *testing.T) {
|
|
testcases := map[string]struct {
|
|
targetLabels []string
|
|
exposedLabels string
|
|
expected []string
|
|
}{
|
|
"One target label collides with existing label": {
|
|
targetLabels: []string{"foo", "2"},
|
|
exposedLabels: `metric{foo="1"} 0`,
|
|
expected: []string{"__name__", "metric", "exported_foo", "1", "foo", "2"},
|
|
},
|
|
|
|
"One target label collides with existing label, plus target label already with prefix 'exported'": {
|
|
targetLabels: []string{"foo", "2", "exported_foo", "3"},
|
|
exposedLabels: `metric{foo="1"} 0`,
|
|
expected: []string{"__name__", "metric", "exported_exported_foo", "1", "exported_foo", "3", "foo", "2"},
|
|
},
|
|
"One target label collides with existing label, plus existing label already with prefix 'exported": {
|
|
targetLabels: []string{"foo", "3"},
|
|
exposedLabels: `metric{foo="1", exported_foo="2"} 0`,
|
|
expected: []string{"__name__", "metric", "exported_exported_foo", "1", "exported_foo", "2", "foo", "3"},
|
|
},
|
|
"One target label collides with existing label, both already with prefix 'exported'": {
|
|
targetLabels: []string{"exported_foo", "2"},
|
|
exposedLabels: `metric{exported_foo="1"} 0`,
|
|
expected: []string{"__name__", "metric", "exported_exported_foo", "1", "exported_foo", "2"},
|
|
},
|
|
"Two target labels collide with existing labels, both with and without prefix 'exported'": {
|
|
targetLabels: []string{"foo", "3", "exported_foo", "4"},
|
|
exposedLabels: `metric{foo="1", exported_foo="2"} 0`,
|
|
expected: []string{
|
|
"__name__", "metric", "exported_exported_foo", "1", "exported_exported_exported_foo",
|
|
"2", "exported_foo", "4", "foo", "3",
|
|
},
|
|
},
|
|
"Extreme example": {
|
|
targetLabels: []string{"foo", "0", "exported_exported_foo", "1", "exported_exported_exported_foo", "2"},
|
|
exposedLabels: `metric{foo="3", exported_foo="4", exported_exported_exported_foo="5"} 0`,
|
|
expected: []string{
|
|
"__name__", "metric",
|
|
"exported_exported_exported_exported_exported_foo", "5",
|
|
"exported_exported_exported_exported_foo", "3",
|
|
"exported_exported_exported_foo", "2",
|
|
"exported_exported_foo", "1",
|
|
"exported_foo", "4",
|
|
"foo", "0",
|
|
},
|
|
},
|
|
}
|
|
|
|
for name, tc := range testcases {
|
|
t.Run(name, func(t *testing.T) {
|
|
app := &collectResultAppender{}
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
sl.sampleMutator = func(l labels.Labels) labels.Labels {
|
|
return mutateSampleLabels(l, &Target{labels: labels.FromStrings(tc.targetLabels...)}, false, nil)
|
|
}
|
|
slApp := sl.appender(context.Background())
|
|
_, _, _, err := sl.append(slApp, []byte(tc.exposedLabels), "", time.Date(2000, 1, 1, 1, 0, 0, 0, time.UTC))
|
|
require.NoError(t, err)
|
|
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
requireEqual(t, []floatSample{
|
|
{
|
|
metric: labels.FromStrings(tc.expected...),
|
|
t: timestamp.FromTime(time.Date(2000, 1, 1, 1, 0, 0, 0, time.UTC)),
|
|
f: 0,
|
|
},
|
|
}, app.resultFloats)
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestScrapeLoopAppendCacheEntryButErrNotFound(t *testing.T) {
|
|
// collectResultAppender's AddFast always returns ErrNotFound if we don't give it a next.
|
|
app := &collectResultAppender{}
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
|
|
fakeRef := storage.SeriesRef(1)
|
|
expValue := float64(1)
|
|
metric := []byte(`metric{n="1"} 1`)
|
|
p, warning := textparse.New(metric, "", false)
|
|
require.NoError(t, warning)
|
|
|
|
var lset labels.Labels
|
|
p.Next()
|
|
p.Metric(&lset)
|
|
hash := lset.Hash()
|
|
|
|
// Create a fake entry in the cache
|
|
sl.cache.addRef(metric, fakeRef, lset, hash)
|
|
now := time.Now()
|
|
|
|
slApp := sl.appender(context.Background())
|
|
_, _, _, err := sl.append(slApp, metric, "", now)
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
expected := []floatSample{
|
|
{
|
|
metric: lset,
|
|
t: timestamp.FromTime(now),
|
|
f: expValue,
|
|
},
|
|
}
|
|
|
|
require.Equal(t, expected, app.resultFloats)
|
|
}
|
|
|
|
func TestScrapeLoopAppendSampleLimit(t *testing.T) {
|
|
resApp := &collectResultAppender{}
|
|
app := &limitAppender{Appender: resApp, limit: 1}
|
|
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
sl.sampleMutator = func(l labels.Labels) labels.Labels {
|
|
if l.Has("deleteme") {
|
|
return labels.EmptyLabels()
|
|
}
|
|
return l
|
|
}
|
|
sl.sampleLimit = app.limit
|
|
|
|
// Get the value of the Counter before performing the append.
|
|
beforeMetric := dto.Metric{}
|
|
err := sl.metrics.targetScrapeSampleLimit.Write(&beforeMetric)
|
|
require.NoError(t, err)
|
|
|
|
beforeMetricValue := beforeMetric.GetCounter().GetValue()
|
|
|
|
now := time.Now()
|
|
slApp := sl.appender(context.Background())
|
|
total, added, seriesAdded, err := sl.append(app, []byte("metric_a 1\nmetric_b 1\nmetric_c 1\n"), "", now)
|
|
require.ErrorIs(t, err, errSampleLimit)
|
|
require.NoError(t, slApp.Rollback())
|
|
require.Equal(t, 3, total)
|
|
require.Equal(t, 3, added)
|
|
require.Equal(t, 1, seriesAdded)
|
|
|
|
// Check that the Counter has been incremented a single time for the scrape,
|
|
// not multiple times for each sample.
|
|
metric := dto.Metric{}
|
|
err = sl.metrics.targetScrapeSampleLimit.Write(&metric)
|
|
require.NoError(t, err)
|
|
|
|
value := metric.GetCounter().GetValue()
|
|
change := value - beforeMetricValue
|
|
require.Equal(t, 1.0, change, "Unexpected change of sample limit metric: %f", change)
|
|
|
|
// And verify that we got the samples that fit under the limit.
|
|
want := []floatSample{
|
|
{
|
|
metric: labels.FromStrings(model.MetricNameLabel, "metric_a"),
|
|
t: timestamp.FromTime(now),
|
|
f: 1,
|
|
},
|
|
}
|
|
requireEqual(t, want, resApp.rolledbackFloats, "Appended samples not as expected:\n%s", appender)
|
|
|
|
now = time.Now()
|
|
slApp = sl.appender(context.Background())
|
|
total, added, seriesAdded, err = sl.append(slApp, []byte("metric_a 1\nmetric_b 1\nmetric_c{deleteme=\"yes\"} 1\nmetric_d 1\nmetric_e 1\nmetric_f 1\nmetric_g 1\nmetric_h{deleteme=\"yes\"} 1\nmetric_i{deleteme=\"yes\"} 1\n"), "", now)
|
|
require.ErrorIs(t, err, errSampleLimit)
|
|
require.NoError(t, slApp.Rollback())
|
|
require.Equal(t, 9, total)
|
|
require.Equal(t, 6, added)
|
|
require.Equal(t, 0, seriesAdded)
|
|
}
|
|
|
|
func TestScrapeLoop_HistogramBucketLimit(t *testing.T) {
|
|
resApp := &collectResultAppender{}
|
|
app := &bucketLimitAppender{Appender: resApp, limit: 2}
|
|
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
sl.sampleMutator = func(l labels.Labels) labels.Labels {
|
|
if l.Has("deleteme") {
|
|
return labels.EmptyLabels()
|
|
}
|
|
return l
|
|
}
|
|
sl.sampleLimit = app.limit
|
|
|
|
metric := dto.Metric{}
|
|
err := sl.metrics.targetScrapeNativeHistogramBucketLimit.Write(&metric)
|
|
require.NoError(t, err)
|
|
beforeMetricValue := metric.GetCounter().GetValue()
|
|
|
|
nativeHistogram := prometheus.NewHistogramVec(
|
|
prometheus.HistogramOpts{
|
|
Namespace: "testing",
|
|
Name: "example_native_histogram",
|
|
Help: "This is used for testing",
|
|
ConstLabels: map[string]string{"some": "value"},
|
|
NativeHistogramBucketFactor: 1.1, // 10% increase from bucket to bucket
|
|
NativeHistogramMaxBucketNumber: 100, // intentionally higher than the limit we'll use in the scraper
|
|
},
|
|
[]string{"size"},
|
|
)
|
|
registry := prometheus.NewRegistry()
|
|
registry.Register(nativeHistogram)
|
|
nativeHistogram.WithLabelValues("S").Observe(1.0)
|
|
nativeHistogram.WithLabelValues("M").Observe(1.0)
|
|
nativeHistogram.WithLabelValues("L").Observe(1.0)
|
|
nativeHistogram.WithLabelValues("M").Observe(10.0)
|
|
nativeHistogram.WithLabelValues("L").Observe(10.0) // in different bucket since > 1*1.1
|
|
|
|
gathered, err := registry.Gather()
|
|
require.NoError(t, err)
|
|
require.NotEmpty(t, gathered)
|
|
|
|
histogramMetricFamily := gathered[0]
|
|
msg, err := MetricFamilyToProtobuf(histogramMetricFamily)
|
|
require.NoError(t, err)
|
|
|
|
now := time.Now()
|
|
total, added, seriesAdded, err := sl.append(app, msg, "application/vnd.google.protobuf", now)
|
|
require.NoError(t, err)
|
|
require.Equal(t, 3, total)
|
|
require.Equal(t, 3, added)
|
|
require.Equal(t, 3, seriesAdded)
|
|
|
|
err = sl.metrics.targetScrapeNativeHistogramBucketLimit.Write(&metric)
|
|
require.NoError(t, err)
|
|
metricValue := metric.GetCounter().GetValue()
|
|
require.Equal(t, beforeMetricValue, metricValue)
|
|
beforeMetricValue = metricValue
|
|
|
|
nativeHistogram.WithLabelValues("L").Observe(100.0) // in different bucket since > 10*1.1
|
|
|
|
gathered, err = registry.Gather()
|
|
require.NoError(t, err)
|
|
require.NotEmpty(t, gathered)
|
|
|
|
histogramMetricFamily = gathered[0]
|
|
msg, err = MetricFamilyToProtobuf(histogramMetricFamily)
|
|
require.NoError(t, err)
|
|
|
|
now = time.Now()
|
|
total, added, seriesAdded, err = sl.append(app, msg, "application/vnd.google.protobuf", now)
|
|
require.NoError(t, err)
|
|
require.Equal(t, 3, total)
|
|
require.Equal(t, 3, added)
|
|
require.Equal(t, 3, seriesAdded)
|
|
|
|
err = sl.metrics.targetScrapeNativeHistogramBucketLimit.Write(&metric)
|
|
require.NoError(t, err)
|
|
metricValue = metric.GetCounter().GetValue()
|
|
require.Equal(t, beforeMetricValue, metricValue)
|
|
beforeMetricValue = metricValue
|
|
|
|
nativeHistogram.WithLabelValues("L").Observe(100000.0) // in different bucket since > 10*1.1
|
|
|
|
gathered, err = registry.Gather()
|
|
require.NoError(t, err)
|
|
require.NotEmpty(t, gathered)
|
|
|
|
histogramMetricFamily = gathered[0]
|
|
msg, err = MetricFamilyToProtobuf(histogramMetricFamily)
|
|
require.NoError(t, err)
|
|
|
|
now = time.Now()
|
|
total, added, seriesAdded, err = sl.append(app, msg, "application/vnd.google.protobuf", now)
|
|
if !errors.Is(err, errBucketLimit) {
|
|
t.Fatalf("Did not see expected histogram bucket limit error: %s", err)
|
|
}
|
|
require.NoError(t, app.Rollback())
|
|
require.Equal(t, 3, total)
|
|
require.Equal(t, 3, added)
|
|
require.Equal(t, 0, seriesAdded)
|
|
|
|
err = sl.metrics.targetScrapeNativeHistogramBucketLimit.Write(&metric)
|
|
require.NoError(t, err)
|
|
metricValue = metric.GetCounter().GetValue()
|
|
require.Equal(t, beforeMetricValue+1, metricValue)
|
|
}
|
|
|
|
func TestScrapeLoop_ChangingMetricString(t *testing.T) {
|
|
// This is a regression test for the scrape loop cache not properly maintaining
|
|
// IDs when the string representation of a metric changes across a scrape. Thus
|
|
// we use a real storage appender here.
|
|
s := teststorage.New(t)
|
|
defer s.Close()
|
|
|
|
capp := &collectResultAppender{}
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return capp }, 0)
|
|
|
|
now := time.Now()
|
|
slApp := sl.appender(context.Background())
|
|
_, _, _, err := sl.append(slApp, []byte(`metric_a{a="1",b="1"} 1`), "", now)
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
slApp = sl.appender(context.Background())
|
|
_, _, _, err = sl.append(slApp, []byte(`metric_a{b="1",a="1"} 2`), "", now.Add(time.Minute))
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
want := []floatSample{
|
|
{
|
|
metric: labels.FromStrings("__name__", "metric_a", "a", "1", "b", "1"),
|
|
t: timestamp.FromTime(now),
|
|
f: 1,
|
|
},
|
|
{
|
|
metric: labels.FromStrings("__name__", "metric_a", "a", "1", "b", "1"),
|
|
t: timestamp.FromTime(now.Add(time.Minute)),
|
|
f: 2,
|
|
},
|
|
}
|
|
require.Equal(t, want, capp.resultFloats, "Appended samples not as expected:\n%s", appender)
|
|
}
|
|
|
|
func TestScrapeLoopAppendStaleness(t *testing.T) {
|
|
app := &collectResultAppender{}
|
|
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
|
|
now := time.Now()
|
|
slApp := sl.appender(context.Background())
|
|
_, _, _, err := sl.append(slApp, []byte("metric_a 1\n"), "", now)
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
slApp = sl.appender(context.Background())
|
|
_, _, _, err = sl.append(slApp, []byte(""), "", now.Add(time.Second))
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
want := []floatSample{
|
|
{
|
|
metric: labels.FromStrings(model.MetricNameLabel, "metric_a"),
|
|
t: timestamp.FromTime(now),
|
|
f: 1,
|
|
},
|
|
{
|
|
metric: labels.FromStrings(model.MetricNameLabel, "metric_a"),
|
|
t: timestamp.FromTime(now.Add(time.Second)),
|
|
f: math.Float64frombits(value.StaleNaN),
|
|
},
|
|
}
|
|
requireEqual(t, want, app.resultFloats, "Appended samples not as expected:\n%s", appender)
|
|
}
|
|
|
|
func TestScrapeLoopAppendNoStalenessIfTimestamp(t *testing.T) {
|
|
app := &collectResultAppender{}
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
now := time.Now()
|
|
slApp := sl.appender(context.Background())
|
|
_, _, _, err := sl.append(slApp, []byte("metric_a 1 1000\n"), "", now)
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
slApp = sl.appender(context.Background())
|
|
_, _, _, err = sl.append(slApp, []byte(""), "", now.Add(time.Second))
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
want := []floatSample{
|
|
{
|
|
metric: labels.FromStrings(model.MetricNameLabel, "metric_a"),
|
|
t: 1000,
|
|
f: 1,
|
|
},
|
|
}
|
|
require.Equal(t, want, app.resultFloats, "Appended samples not as expected:\n%s", appender)
|
|
}
|
|
|
|
func TestScrapeLoopAppendStalenessIfTrackTimestampStaleness(t *testing.T) {
|
|
app := &collectResultAppender{}
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
sl.trackTimestampsStaleness = true
|
|
|
|
now := time.Now()
|
|
slApp := sl.appender(context.Background())
|
|
_, _, _, err := sl.append(slApp, []byte("metric_a 1 1000\n"), "", now)
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
slApp = sl.appender(context.Background())
|
|
_, _, _, err = sl.append(slApp, []byte(""), "", now.Add(time.Second))
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
want := []floatSample{
|
|
{
|
|
metric: labels.FromStrings(model.MetricNameLabel, "metric_a"),
|
|
t: 1000,
|
|
f: 1,
|
|
},
|
|
{
|
|
metric: labels.FromStrings(model.MetricNameLabel, "metric_a"),
|
|
t: timestamp.FromTime(now.Add(time.Second)),
|
|
f: math.Float64frombits(value.StaleNaN),
|
|
},
|
|
}
|
|
requireEqual(t, want, app.resultFloats, "Appended samples not as expected:\n%s", appender)
|
|
}
|
|
|
|
func TestScrapeLoopAppendExemplar(t *testing.T) {
|
|
tests := []struct {
|
|
title string
|
|
scrapeClassicHistograms bool
|
|
scrapeText string
|
|
contentType string
|
|
discoveryLabels []string
|
|
floats []floatSample
|
|
histograms []histogramSample
|
|
exemplars []exemplar.Exemplar
|
|
}{
|
|
{
|
|
title: "Metric without exemplars",
|
|
scrapeText: "metric_total{n=\"1\"} 0\n# EOF",
|
|
contentType: "application/openmetrics-text",
|
|
discoveryLabels: []string{"n", "2"},
|
|
floats: []floatSample{{
|
|
metric: labels.FromStrings("__name__", "metric_total", "exported_n", "1", "n", "2"),
|
|
f: 0,
|
|
}},
|
|
},
|
|
{
|
|
title: "Metric with exemplars",
|
|
scrapeText: "metric_total{n=\"1\"} 0 # {a=\"abc\"} 1.0\n# EOF",
|
|
contentType: "application/openmetrics-text",
|
|
discoveryLabels: []string{"n", "2"},
|
|
floats: []floatSample{{
|
|
metric: labels.FromStrings("__name__", "metric_total", "exported_n", "1", "n", "2"),
|
|
f: 0,
|
|
}},
|
|
exemplars: []exemplar.Exemplar{
|
|
{Labels: labels.FromStrings("a", "abc"), Value: 1},
|
|
},
|
|
},
|
|
{
|
|
title: "Metric with exemplars and TS",
|
|
scrapeText: "metric_total{n=\"1\"} 0 # {a=\"abc\"} 1.0 10000\n# EOF",
|
|
contentType: "application/openmetrics-text",
|
|
discoveryLabels: []string{"n", "2"},
|
|
floats: []floatSample{{
|
|
metric: labels.FromStrings("__name__", "metric_total", "exported_n", "1", "n", "2"),
|
|
f: 0,
|
|
}},
|
|
exemplars: []exemplar.Exemplar{
|
|
{Labels: labels.FromStrings("a", "abc"), Value: 1, Ts: 10000000, HasTs: true},
|
|
},
|
|
},
|
|
{
|
|
title: "Two metrics and exemplars",
|
|
scrapeText: `metric_total{n="1"} 1 # {t="1"} 1.0 10000
|
|
metric_total{n="2"} 2 # {t="2"} 2.0 20000
|
|
# EOF`,
|
|
contentType: "application/openmetrics-text",
|
|
floats: []floatSample{{
|
|
metric: labels.FromStrings("__name__", "metric_total", "n", "1"),
|
|
f: 1,
|
|
}, {
|
|
metric: labels.FromStrings("__name__", "metric_total", "n", "2"),
|
|
f: 2,
|
|
}},
|
|
exemplars: []exemplar.Exemplar{
|
|
{Labels: labels.FromStrings("t", "1"), Value: 1, Ts: 10000000, HasTs: true},
|
|
{Labels: labels.FromStrings("t", "2"), Value: 2, Ts: 20000000, HasTs: true},
|
|
},
|
|
},
|
|
{
|
|
title: "Native histogram with three exemplars",
|
|
scrapeText: `name: "test_histogram"
|
|
help: "Test histogram with many buckets removed to keep it manageable in size."
|
|
type: HISTOGRAM
|
|
metric: <
|
|
histogram: <
|
|
sample_count: 175
|
|
sample_sum: 0.0008280461746287094
|
|
bucket: <
|
|
cumulative_count: 2
|
|
upper_bound: -0.0004899999999999998
|
|
>
|
|
bucket: <
|
|
cumulative_count: 4
|
|
upper_bound: -0.0003899999999999998
|
|
exemplar: <
|
|
label: <
|
|
name: "dummyID"
|
|
value: "59727"
|
|
>
|
|
value: -0.00039
|
|
timestamp: <
|
|
seconds: 1625851155
|
|
nanos: 146848499
|
|
>
|
|
>
|
|
>
|
|
bucket: <
|
|
cumulative_count: 16
|
|
upper_bound: -0.0002899999999999998
|
|
exemplar: <
|
|
label: <
|
|
name: "dummyID"
|
|
value: "5617"
|
|
>
|
|
value: -0.00029
|
|
>
|
|
>
|
|
bucket: <
|
|
cumulative_count: 32
|
|
upper_bound: -0.0001899999999999998
|
|
exemplar: <
|
|
label: <
|
|
name: "dummyID"
|
|
value: "58215"
|
|
>
|
|
value: -0.00019
|
|
timestamp: <
|
|
seconds: 1625851055
|
|
nanos: 146848599
|
|
>
|
|
>
|
|
>
|
|
schema: 3
|
|
zero_threshold: 2.938735877055719e-39
|
|
zero_count: 2
|
|
negative_span: <
|
|
offset: -162
|
|
length: 1
|
|
>
|
|
negative_span: <
|
|
offset: 23
|
|
length: 4
|
|
>
|
|
negative_delta: 1
|
|
negative_delta: 3
|
|
negative_delta: -2
|
|
negative_delta: -1
|
|
negative_delta: 1
|
|
positive_span: <
|
|
offset: -161
|
|
length: 1
|
|
>
|
|
positive_span: <
|
|
offset: 8
|
|
length: 3
|
|
>
|
|
positive_delta: 1
|
|
positive_delta: 2
|
|
positive_delta: -1
|
|
positive_delta: -1
|
|
>
|
|
timestamp_ms: 1234568
|
|
>
|
|
|
|
`,
|
|
contentType: "application/vnd.google.protobuf",
|
|
histograms: []histogramSample{{
|
|
t: 1234568,
|
|
h: &histogram.Histogram{
|
|
Count: 175,
|
|
ZeroCount: 2,
|
|
Sum: 0.0008280461746287094,
|
|
ZeroThreshold: 2.938735877055719e-39,
|
|
Schema: 3,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: -161, Length: 1},
|
|
{Offset: 8, Length: 3},
|
|
},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: -162, Length: 1},
|
|
{Offset: 23, Length: 4},
|
|
},
|
|
PositiveBuckets: []int64{1, 2, -1, -1},
|
|
NegativeBuckets: []int64{1, 3, -2, -1, 1},
|
|
},
|
|
}},
|
|
exemplars: []exemplar.Exemplar{
|
|
// Native histogram exemplars are arranged by timestamp, and those with missing timestamps are dropped.
|
|
{Labels: labels.FromStrings("dummyID", "58215"), Value: -0.00019, Ts: 1625851055146, HasTs: true},
|
|
{Labels: labels.FromStrings("dummyID", "59727"), Value: -0.00039, Ts: 1625851155146, HasTs: true},
|
|
},
|
|
},
|
|
{
|
|
title: "Native histogram with three exemplars scraped as classic histogram",
|
|
scrapeText: `name: "test_histogram"
|
|
help: "Test histogram with many buckets removed to keep it manageable in size."
|
|
type: HISTOGRAM
|
|
metric: <
|
|
histogram: <
|
|
sample_count: 175
|
|
sample_sum: 0.0008280461746287094
|
|
bucket: <
|
|
cumulative_count: 2
|
|
upper_bound: -0.0004899999999999998
|
|
>
|
|
bucket: <
|
|
cumulative_count: 4
|
|
upper_bound: -0.0003899999999999998
|
|
exemplar: <
|
|
label: <
|
|
name: "dummyID"
|
|
value: "59727"
|
|
>
|
|
value: -0.00039
|
|
timestamp: <
|
|
seconds: 1625851155
|
|
nanos: 146848499
|
|
>
|
|
>
|
|
>
|
|
bucket: <
|
|
cumulative_count: 16
|
|
upper_bound: -0.0002899999999999998
|
|
exemplar: <
|
|
label: <
|
|
name: "dummyID"
|
|
value: "5617"
|
|
>
|
|
value: -0.00029
|
|
>
|
|
>
|
|
bucket: <
|
|
cumulative_count: 32
|
|
upper_bound: -0.0001899999999999998
|
|
exemplar: <
|
|
label: <
|
|
name: "dummyID"
|
|
value: "58215"
|
|
>
|
|
value: -0.00019
|
|
timestamp: <
|
|
seconds: 1625851055
|
|
nanos: 146848599
|
|
>
|
|
>
|
|
>
|
|
schema: 3
|
|
zero_threshold: 2.938735877055719e-39
|
|
zero_count: 2
|
|
negative_span: <
|
|
offset: -162
|
|
length: 1
|
|
>
|
|
negative_span: <
|
|
offset: 23
|
|
length: 4
|
|
>
|
|
negative_delta: 1
|
|
negative_delta: 3
|
|
negative_delta: -2
|
|
negative_delta: -1
|
|
negative_delta: 1
|
|
positive_span: <
|
|
offset: -161
|
|
length: 1
|
|
>
|
|
positive_span: <
|
|
offset: 8
|
|
length: 3
|
|
>
|
|
positive_delta: 1
|
|
positive_delta: 2
|
|
positive_delta: -1
|
|
positive_delta: -1
|
|
>
|
|
timestamp_ms: 1234568
|
|
>
|
|
|
|
`,
|
|
scrapeClassicHistograms: true,
|
|
contentType: "application/vnd.google.protobuf",
|
|
floats: []floatSample{
|
|
{metric: labels.FromStrings("__name__", "test_histogram_count"), t: 1234568, f: 175},
|
|
{metric: labels.FromStrings("__name__", "test_histogram_sum"), t: 1234568, f: 0.0008280461746287094},
|
|
{metric: labels.FromStrings("__name__", "test_histogram_bucket", "le", "-0.0004899999999999998"), t: 1234568, f: 2},
|
|
{metric: labels.FromStrings("__name__", "test_histogram_bucket", "le", "-0.0003899999999999998"), t: 1234568, f: 4},
|
|
{metric: labels.FromStrings("__name__", "test_histogram_bucket", "le", "-0.0002899999999999998"), t: 1234568, f: 16},
|
|
{metric: labels.FromStrings("__name__", "test_histogram_bucket", "le", "-0.0001899999999999998"), t: 1234568, f: 32},
|
|
{metric: labels.FromStrings("__name__", "test_histogram_bucket", "le", "+Inf"), t: 1234568, f: 175},
|
|
},
|
|
histograms: []histogramSample{{
|
|
t: 1234568,
|
|
h: &histogram.Histogram{
|
|
Count: 175,
|
|
ZeroCount: 2,
|
|
Sum: 0.0008280461746287094,
|
|
ZeroThreshold: 2.938735877055719e-39,
|
|
Schema: 3,
|
|
PositiveSpans: []histogram.Span{
|
|
{Offset: -161, Length: 1},
|
|
{Offset: 8, Length: 3},
|
|
},
|
|
NegativeSpans: []histogram.Span{
|
|
{Offset: -162, Length: 1},
|
|
{Offset: 23, Length: 4},
|
|
},
|
|
PositiveBuckets: []int64{1, 2, -1, -1},
|
|
NegativeBuckets: []int64{1, 3, -2, -1, 1},
|
|
},
|
|
}},
|
|
exemplars: []exemplar.Exemplar{
|
|
// Native histogram one is arranged by timestamp.
|
|
// Exemplars with missing timestamps are dropped for native histograms.
|
|
{Labels: labels.FromStrings("dummyID", "58215"), Value: -0.00019, Ts: 1625851055146, HasTs: true},
|
|
{Labels: labels.FromStrings("dummyID", "59727"), Value: -0.00039, Ts: 1625851155146, HasTs: true},
|
|
// Classic histogram one is in order of appearance.
|
|
// Exemplars with missing timestamps are supported for classic histograms.
|
|
{Labels: labels.FromStrings("dummyID", "59727"), Value: -0.00039, Ts: 1625851155146, HasTs: true},
|
|
{Labels: labels.FromStrings("dummyID", "5617"), Value: -0.00029, Ts: 1234568, HasTs: false},
|
|
{Labels: labels.FromStrings("dummyID", "58215"), Value: -0.00019, Ts: 1625851055146, HasTs: true},
|
|
},
|
|
},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
t.Run(test.title, func(t *testing.T) {
|
|
app := &collectResultAppender{}
|
|
|
|
discoveryLabels := &Target{
|
|
labels: labels.FromStrings(test.discoveryLabels...),
|
|
}
|
|
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
sl.sampleMutator = func(l labels.Labels) labels.Labels {
|
|
return mutateSampleLabels(l, discoveryLabels, false, nil)
|
|
}
|
|
sl.reportSampleMutator = func(l labels.Labels) labels.Labels {
|
|
return mutateReportSampleLabels(l, discoveryLabels)
|
|
}
|
|
sl.scrapeClassicHistograms = test.scrapeClassicHistograms
|
|
|
|
now := time.Now()
|
|
|
|
for i := range test.floats {
|
|
if test.floats[i].t != 0 {
|
|
continue
|
|
}
|
|
test.floats[i].t = timestamp.FromTime(now)
|
|
}
|
|
|
|
// We need to set the timestamp for expected exemplars that does not have a timestamp.
|
|
for i := range test.exemplars {
|
|
if test.exemplars[i].Ts == 0 {
|
|
test.exemplars[i].Ts = timestamp.FromTime(now)
|
|
}
|
|
}
|
|
|
|
buf := &bytes.Buffer{}
|
|
if test.contentType == "application/vnd.google.protobuf" {
|
|
// In case of protobuf, we have to create the binary representation.
|
|
pb := &dto.MetricFamily{}
|
|
// From text to proto message.
|
|
require.NoError(t, proto.UnmarshalText(test.scrapeText, pb))
|
|
// From proto message to binary protobuf.
|
|
protoBuf, err := proto.Marshal(pb)
|
|
require.NoError(t, err)
|
|
|
|
// Write first length, then binary protobuf.
|
|
varintBuf := binary.AppendUvarint(nil, uint64(len(protoBuf)))
|
|
buf.Write(varintBuf)
|
|
buf.Write(protoBuf)
|
|
} else {
|
|
buf.WriteString(test.scrapeText)
|
|
}
|
|
|
|
_, _, _, err := sl.append(app, buf.Bytes(), test.contentType, now)
|
|
require.NoError(t, err)
|
|
require.NoError(t, app.Commit())
|
|
requireEqual(t, test.floats, app.resultFloats)
|
|
requireEqual(t, test.histograms, app.resultHistograms)
|
|
requireEqual(t, test.exemplars, app.resultExemplars)
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestScrapeLoopAppendExemplarSeries(t *testing.T) {
|
|
scrapeText := []string{`metric_total{n="1"} 1 # {t="1"} 1.0 10000
|
|
# EOF`, `metric_total{n="1"} 2 # {t="2"} 2.0 20000
|
|
# EOF`}
|
|
samples := []floatSample{{
|
|
metric: labels.FromStrings("__name__", "metric_total", "n", "1"),
|
|
f: 1,
|
|
}, {
|
|
metric: labels.FromStrings("__name__", "metric_total", "n", "1"),
|
|
f: 2,
|
|
}}
|
|
exemplars := []exemplar.Exemplar{
|
|
{Labels: labels.FromStrings("t", "1"), Value: 1, Ts: 10000000, HasTs: true},
|
|
{Labels: labels.FromStrings("t", "2"), Value: 2, Ts: 20000000, HasTs: true},
|
|
}
|
|
discoveryLabels := &Target{
|
|
labels: labels.FromStrings(),
|
|
}
|
|
|
|
app := &collectResultAppender{}
|
|
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
sl.sampleMutator = func(l labels.Labels) labels.Labels {
|
|
return mutateSampleLabels(l, discoveryLabels, false, nil)
|
|
}
|
|
sl.reportSampleMutator = func(l labels.Labels) labels.Labels {
|
|
return mutateReportSampleLabels(l, discoveryLabels)
|
|
}
|
|
|
|
now := time.Now()
|
|
|
|
for i := range samples {
|
|
ts := now.Add(time.Second * time.Duration(i))
|
|
samples[i].t = timestamp.FromTime(ts)
|
|
}
|
|
|
|
// We need to set the timestamp for expected exemplars that does not have a timestamp.
|
|
for i := range exemplars {
|
|
if exemplars[i].Ts == 0 {
|
|
ts := now.Add(time.Second * time.Duration(i))
|
|
exemplars[i].Ts = timestamp.FromTime(ts)
|
|
}
|
|
}
|
|
|
|
for i, st := range scrapeText {
|
|
_, _, _, err := sl.append(app, []byte(st), "application/openmetrics-text", timestamp.Time(samples[i].t))
|
|
require.NoError(t, err)
|
|
require.NoError(t, app.Commit())
|
|
}
|
|
|
|
requireEqual(t, samples, app.resultFloats)
|
|
requireEqual(t, exemplars, app.resultExemplars)
|
|
}
|
|
|
|
func TestScrapeLoopRunReportsTargetDownOnScrapeError(t *testing.T) {
|
|
var (
|
|
scraper = &testScraper{}
|
|
appender = &collectResultAppender{}
|
|
app = func(ctx context.Context) storage.Appender { return appender }
|
|
)
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, ctx, scraper, app, 10*time.Millisecond)
|
|
|
|
scraper.scrapeFunc = func(ctx context.Context, w io.Writer) error {
|
|
cancel()
|
|
return errors.New("scrape failed")
|
|
}
|
|
|
|
sl.run(nil)
|
|
require.Equal(t, 0.0, appender.resultFloats[0].f, "bad 'up' value")
|
|
}
|
|
|
|
func TestScrapeLoopRunReportsTargetDownOnInvalidUTF8(t *testing.T) {
|
|
var (
|
|
scraper = &testScraper{}
|
|
appender = &collectResultAppender{}
|
|
app = func(ctx context.Context) storage.Appender { return appender }
|
|
)
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, ctx, scraper, app, 10*time.Millisecond)
|
|
|
|
scraper.scrapeFunc = func(ctx context.Context, w io.Writer) error {
|
|
cancel()
|
|
w.Write([]byte("a{l=\"\xff\"} 1\n"))
|
|
return nil
|
|
}
|
|
|
|
sl.run(nil)
|
|
require.Equal(t, 0.0, appender.resultFloats[0].f, "bad 'up' value")
|
|
}
|
|
|
|
type errorAppender struct {
|
|
collectResultAppender
|
|
}
|
|
|
|
func (app *errorAppender) Append(ref storage.SeriesRef, lset labels.Labels, t int64, v float64) (storage.SeriesRef, error) {
|
|
switch lset.Get(model.MetricNameLabel) {
|
|
case "out_of_order":
|
|
return 0, storage.ErrOutOfOrderSample
|
|
case "amend":
|
|
return 0, storage.ErrDuplicateSampleForTimestamp
|
|
case "out_of_bounds":
|
|
return 0, storage.ErrOutOfBounds
|
|
default:
|
|
return app.collectResultAppender.Append(ref, lset, t, v)
|
|
}
|
|
}
|
|
|
|
func TestScrapeLoopAppendGracefullyIfAmendOrOutOfOrderOrOutOfBounds(t *testing.T) {
|
|
app := &errorAppender{}
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
|
|
now := time.Unix(1, 0)
|
|
slApp := sl.appender(context.Background())
|
|
total, added, seriesAdded, err := sl.append(slApp, []byte("out_of_order 1\namend 1\nnormal 1\nout_of_bounds 1\n"), "", now)
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
want := []floatSample{
|
|
{
|
|
metric: labels.FromStrings(model.MetricNameLabel, "normal"),
|
|
t: timestamp.FromTime(now),
|
|
f: 1,
|
|
},
|
|
}
|
|
requireEqual(t, want, app.resultFloats, "Appended samples not as expected:\n%s", appender)
|
|
require.Equal(t, 4, total)
|
|
require.Equal(t, 4, added)
|
|
require.Equal(t, 1, seriesAdded)
|
|
}
|
|
|
|
func TestScrapeLoopOutOfBoundsTimeError(t *testing.T) {
|
|
app := &collectResultAppender{}
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil,
|
|
func(ctx context.Context) storage.Appender {
|
|
return &timeLimitAppender{
|
|
Appender: app,
|
|
maxTime: timestamp.FromTime(time.Now().Add(10 * time.Minute)),
|
|
}
|
|
},
|
|
0,
|
|
)
|
|
|
|
now := time.Now().Add(20 * time.Minute)
|
|
slApp := sl.appender(context.Background())
|
|
total, added, seriesAdded, err := sl.append(slApp, []byte("normal 1\n"), "", now)
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
require.Equal(t, 1, total)
|
|
require.Equal(t, 1, added)
|
|
require.Equal(t, 0, seriesAdded)
|
|
}
|
|
|
|
func TestTargetScraperScrapeOK(t *testing.T) {
|
|
const (
|
|
configTimeout = 1500 * time.Millisecond
|
|
expectedTimeout = "1.5"
|
|
)
|
|
|
|
var protobufParsing bool
|
|
|
|
server := httptest.NewServer(
|
|
http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
if protobufParsing {
|
|
accept := r.Header.Get("Accept")
|
|
require.True(t, strings.HasPrefix(accept, "application/vnd.google.protobuf;"),
|
|
"Expected Accept header to prefer application/vnd.google.protobuf.")
|
|
}
|
|
|
|
timeout := r.Header.Get("X-Prometheus-Scrape-Timeout-Seconds")
|
|
require.Equal(t, expectedTimeout, timeout, "Expected scrape timeout header.")
|
|
|
|
w.Header().Set("Content-Type", `text/plain; version=0.0.4`)
|
|
w.Write([]byte("metric_a 1\nmetric_b 2\n"))
|
|
}),
|
|
)
|
|
defer server.Close()
|
|
|
|
serverURL, err := url.Parse(server.URL)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
runTest := func(acceptHeader string) {
|
|
ts := &targetScraper{
|
|
Target: &Target{
|
|
labels: labels.FromStrings(
|
|
model.SchemeLabel, serverURL.Scheme,
|
|
model.AddressLabel, serverURL.Host,
|
|
),
|
|
},
|
|
client: http.DefaultClient,
|
|
timeout: configTimeout,
|
|
acceptHeader: acceptHeader,
|
|
}
|
|
var buf bytes.Buffer
|
|
|
|
resp, err := ts.scrape(context.Background())
|
|
require.NoError(t, err)
|
|
contentType, err := ts.readResponse(context.Background(), resp, &buf)
|
|
require.NoError(t, err)
|
|
require.Equal(t, "text/plain; version=0.0.4", contentType)
|
|
require.Equal(t, "metric_a 1\nmetric_b 2\n", buf.String())
|
|
}
|
|
|
|
runTest(acceptHeader(config.DefaultScrapeProtocols))
|
|
protobufParsing = true
|
|
runTest(acceptHeader(config.DefaultProtoFirstScrapeProtocols))
|
|
}
|
|
|
|
func TestTargetScrapeScrapeCancel(t *testing.T) {
|
|
block := make(chan struct{})
|
|
|
|
server := httptest.NewServer(
|
|
http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
<-block
|
|
}),
|
|
)
|
|
defer server.Close()
|
|
|
|
serverURL, err := url.Parse(server.URL)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
ts := &targetScraper{
|
|
Target: &Target{
|
|
labels: labels.FromStrings(
|
|
model.SchemeLabel, serverURL.Scheme,
|
|
model.AddressLabel, serverURL.Host,
|
|
),
|
|
},
|
|
client: http.DefaultClient,
|
|
acceptHeader: acceptHeader(config.DefaultGlobalConfig.ScrapeProtocols),
|
|
}
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
|
|
errc := make(chan error, 1)
|
|
|
|
go func() {
|
|
time.Sleep(1 * time.Second)
|
|
cancel()
|
|
}()
|
|
|
|
go func() {
|
|
_, err := ts.scrape(ctx)
|
|
switch {
|
|
case err == nil:
|
|
errc <- errors.New("Expected error but got nil")
|
|
case !errors.Is(ctx.Err(), context.Canceled):
|
|
errc <- fmt.Errorf("Expected context cancellation error but got: %w", ctx.Err())
|
|
default:
|
|
close(errc)
|
|
}
|
|
}()
|
|
|
|
select {
|
|
case <-time.After(5 * time.Second):
|
|
require.FailNow(t, "Scrape function did not return unexpectedly.")
|
|
case err := <-errc:
|
|
require.NoError(t, err)
|
|
}
|
|
// If this is closed in a defer above the function the test server
|
|
// doesn't terminate and the test doesn't complete.
|
|
close(block)
|
|
}
|
|
|
|
func TestTargetScrapeScrapeNotFound(t *testing.T) {
|
|
server := httptest.NewServer(
|
|
http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
w.WriteHeader(http.StatusNotFound)
|
|
}),
|
|
)
|
|
defer server.Close()
|
|
|
|
serverURL, err := url.Parse(server.URL)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
ts := &targetScraper{
|
|
Target: &Target{
|
|
labels: labels.FromStrings(
|
|
model.SchemeLabel, serverURL.Scheme,
|
|
model.AddressLabel, serverURL.Host,
|
|
),
|
|
},
|
|
client: http.DefaultClient,
|
|
acceptHeader: acceptHeader(config.DefaultGlobalConfig.ScrapeProtocols),
|
|
}
|
|
|
|
resp, err := ts.scrape(context.Background())
|
|
require.NoError(t, err)
|
|
_, err = ts.readResponse(context.Background(), resp, io.Discard)
|
|
require.Contains(t, err.Error(), "404", "Expected \"404 NotFound\" error but got: %s", err)
|
|
}
|
|
|
|
func TestTargetScraperBodySizeLimit(t *testing.T) {
|
|
const (
|
|
bodySizeLimit = 15
|
|
responseBody = "metric_a 1\nmetric_b 2\n"
|
|
)
|
|
var gzipResponse bool
|
|
server := httptest.NewServer(
|
|
http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
w.Header().Set("Content-Type", `text/plain; version=0.0.4`)
|
|
if gzipResponse {
|
|
w.Header().Set("Content-Encoding", "gzip")
|
|
gw := gzip.NewWriter(w)
|
|
defer gw.Close()
|
|
gw.Write([]byte(responseBody))
|
|
return
|
|
}
|
|
w.Write([]byte(responseBody))
|
|
}),
|
|
)
|
|
defer server.Close()
|
|
|
|
serverURL, err := url.Parse(server.URL)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
ts := &targetScraper{
|
|
Target: &Target{
|
|
labels: labels.FromStrings(
|
|
model.SchemeLabel, serverURL.Scheme,
|
|
model.AddressLabel, serverURL.Host,
|
|
),
|
|
},
|
|
client: http.DefaultClient,
|
|
bodySizeLimit: bodySizeLimit,
|
|
acceptHeader: acceptHeader(config.DefaultGlobalConfig.ScrapeProtocols),
|
|
metrics: newTestScrapeMetrics(t),
|
|
}
|
|
var buf bytes.Buffer
|
|
|
|
// Target response uncompressed body, scrape with body size limit.
|
|
resp, err := ts.scrape(context.Background())
|
|
require.NoError(t, err)
|
|
_, err = ts.readResponse(context.Background(), resp, &buf)
|
|
require.ErrorIs(t, err, errBodySizeLimit)
|
|
require.Equal(t, bodySizeLimit, buf.Len())
|
|
// Target response gzip compressed body, scrape with body size limit.
|
|
gzipResponse = true
|
|
buf.Reset()
|
|
resp, err = ts.scrape(context.Background())
|
|
require.NoError(t, err)
|
|
_, err = ts.readResponse(context.Background(), resp, &buf)
|
|
require.ErrorIs(t, err, errBodySizeLimit)
|
|
require.Equal(t, bodySizeLimit, buf.Len())
|
|
// Target response uncompressed body, scrape without body size limit.
|
|
gzipResponse = false
|
|
buf.Reset()
|
|
ts.bodySizeLimit = 0
|
|
resp, err = ts.scrape(context.Background())
|
|
require.NoError(t, err)
|
|
_, err = ts.readResponse(context.Background(), resp, &buf)
|
|
require.NoError(t, err)
|
|
require.Len(t, responseBody, buf.Len())
|
|
// Target response gzip compressed body, scrape without body size limit.
|
|
gzipResponse = true
|
|
buf.Reset()
|
|
resp, err = ts.scrape(context.Background())
|
|
require.NoError(t, err)
|
|
_, err = ts.readResponse(context.Background(), resp, &buf)
|
|
require.NoError(t, err)
|
|
require.Len(t, responseBody, buf.Len())
|
|
}
|
|
|
|
// testScraper implements the scraper interface and allows setting values
|
|
// returned by its methods. It also allows setting a custom scrape function.
|
|
type testScraper struct {
|
|
offsetDur time.Duration
|
|
|
|
lastStart time.Time
|
|
lastDuration time.Duration
|
|
lastError error
|
|
|
|
scrapeErr error
|
|
scrapeFunc func(context.Context, io.Writer) error
|
|
}
|
|
|
|
func (ts *testScraper) offset(time.Duration, uint64) time.Duration {
|
|
return ts.offsetDur
|
|
}
|
|
|
|
func (ts *testScraper) Report(start time.Time, duration time.Duration, err error) {
|
|
ts.lastStart = start
|
|
ts.lastDuration = duration
|
|
ts.lastError = err
|
|
}
|
|
|
|
func (ts *testScraper) scrape(ctx context.Context) (*http.Response, error) {
|
|
return nil, ts.scrapeErr
|
|
}
|
|
|
|
func (ts *testScraper) readResponse(ctx context.Context, resp *http.Response, w io.Writer) (string, error) {
|
|
if ts.scrapeFunc != nil {
|
|
return "", ts.scrapeFunc(ctx, w)
|
|
}
|
|
return "", ts.scrapeErr
|
|
}
|
|
|
|
func TestScrapeLoop_RespectTimestamps(t *testing.T) {
|
|
s := teststorage.New(t)
|
|
defer s.Close()
|
|
|
|
app := s.Appender(context.Background())
|
|
capp := &collectResultAppender{next: app}
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return capp }, 0)
|
|
|
|
now := time.Now()
|
|
slApp := sl.appender(context.Background())
|
|
_, _, _, err := sl.append(slApp, []byte(`metric_a{a="1",b="1"} 1 0`), "", now)
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
want := []floatSample{
|
|
{
|
|
metric: labels.FromStrings("__name__", "metric_a", "a", "1", "b", "1"),
|
|
t: 0,
|
|
f: 1,
|
|
},
|
|
}
|
|
require.Equal(t, want, capp.resultFloats, "Appended samples not as expected:\n%s", appender)
|
|
}
|
|
|
|
func TestScrapeLoop_DiscardTimestamps(t *testing.T) {
|
|
s := teststorage.New(t)
|
|
defer s.Close()
|
|
|
|
app := s.Appender(context.Background())
|
|
|
|
capp := &collectResultAppender{next: app}
|
|
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return capp }, 0)
|
|
sl.honorTimestamps = false
|
|
|
|
now := time.Now()
|
|
slApp := sl.appender(context.Background())
|
|
_, _, _, err := sl.append(slApp, []byte(`metric_a{a="1",b="1"} 1 0`), "", now)
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
want := []floatSample{
|
|
{
|
|
metric: labels.FromStrings("__name__", "metric_a", "a", "1", "b", "1"),
|
|
t: timestamp.FromTime(now),
|
|
f: 1,
|
|
},
|
|
}
|
|
require.Equal(t, want, capp.resultFloats, "Appended samples not as expected:\n%s", appender)
|
|
}
|
|
|
|
func TestScrapeLoopDiscardDuplicateLabels(t *testing.T) {
|
|
s := teststorage.New(t)
|
|
defer s.Close()
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, ctx, &testScraper{}, s.Appender, 0)
|
|
defer cancel()
|
|
|
|
// We add a good and a bad metric to check that both are discarded.
|
|
slApp := sl.appender(ctx)
|
|
_, _, _, err := sl.append(slApp, []byte("test_metric{le=\"500\"} 1\ntest_metric{le=\"600\",le=\"700\"} 1\n"), "", time.Time{})
|
|
require.Error(t, err)
|
|
require.NoError(t, slApp.Rollback())
|
|
|
|
q, err := s.Querier(time.Time{}.UnixNano(), 0)
|
|
require.NoError(t, err)
|
|
series := q.Select(ctx, false, nil, labels.MustNewMatcher(labels.MatchRegexp, "__name__", ".*"))
|
|
require.False(t, series.Next(), "series found in tsdb")
|
|
require.NoError(t, series.Err())
|
|
|
|
// We add a good metric to check that it is recorded.
|
|
slApp = sl.appender(ctx)
|
|
_, _, _, err = sl.append(slApp, []byte("test_metric{le=\"500\"} 1\n"), "", time.Time{})
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
q, err = s.Querier(time.Time{}.UnixNano(), 0)
|
|
require.NoError(t, err)
|
|
series = q.Select(ctx, false, nil, labels.MustNewMatcher(labels.MatchEqual, "le", "500"))
|
|
require.True(t, series.Next(), "series not found in tsdb")
|
|
require.NoError(t, series.Err())
|
|
require.False(t, series.Next(), "more than one series found in tsdb")
|
|
}
|
|
|
|
func TestScrapeLoopDiscardUnnamedMetrics(t *testing.T) {
|
|
s := teststorage.New(t)
|
|
defer s.Close()
|
|
|
|
app := s.Appender(context.Background())
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, context.Background(), &testScraper{}, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
sl.sampleMutator = func(l labels.Labels) labels.Labels {
|
|
if l.Has("drop") {
|
|
return labels.FromStrings("no", "name") // This label set will trigger an error.
|
|
}
|
|
return l
|
|
}
|
|
defer cancel()
|
|
|
|
slApp := sl.appender(context.Background())
|
|
_, _, _, err := sl.append(slApp, []byte("nok 1\nnok2{drop=\"drop\"} 1\n"), "", time.Time{})
|
|
require.Error(t, err)
|
|
require.NoError(t, slApp.Rollback())
|
|
require.Equal(t, errNameLabelMandatory, err)
|
|
|
|
q, err := s.Querier(time.Time{}.UnixNano(), 0)
|
|
require.NoError(t, err)
|
|
series := q.Select(ctx, false, nil, labels.MustNewMatcher(labels.MatchRegexp, "__name__", ".*"))
|
|
require.False(t, series.Next(), "series found in tsdb")
|
|
require.NoError(t, series.Err())
|
|
}
|
|
|
|
func TestReusableConfig(t *testing.T) {
|
|
variants := []*config.ScrapeConfig{
|
|
{
|
|
JobName: "prometheus",
|
|
ScrapeTimeout: model.Duration(15 * time.Second),
|
|
},
|
|
{
|
|
JobName: "httpd",
|
|
ScrapeTimeout: model.Duration(15 * time.Second),
|
|
},
|
|
{
|
|
JobName: "prometheus",
|
|
ScrapeTimeout: model.Duration(5 * time.Second),
|
|
},
|
|
{
|
|
JobName: "prometheus",
|
|
MetricsPath: "/metrics",
|
|
},
|
|
{
|
|
JobName: "prometheus",
|
|
MetricsPath: "/metrics2",
|
|
},
|
|
{
|
|
JobName: "prometheus",
|
|
ScrapeTimeout: model.Duration(5 * time.Second),
|
|
MetricsPath: "/metrics2",
|
|
},
|
|
{
|
|
JobName: "prometheus",
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
MetricsPath: "/metrics2",
|
|
},
|
|
{
|
|
JobName: "prometheus",
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
SampleLimit: 1000,
|
|
MetricsPath: "/metrics2",
|
|
},
|
|
}
|
|
|
|
match := [][]int{
|
|
{0, 2},
|
|
{4, 5},
|
|
{4, 6},
|
|
{4, 7},
|
|
{5, 6},
|
|
{5, 7},
|
|
{6, 7},
|
|
}
|
|
noMatch := [][]int{
|
|
{1, 2},
|
|
{0, 4},
|
|
{3, 4},
|
|
}
|
|
|
|
for i, m := range match {
|
|
require.True(t, reusableCache(variants[m[0]], variants[m[1]]), "match test %d", i)
|
|
require.True(t, reusableCache(variants[m[1]], variants[m[0]]), "match test %d", i)
|
|
require.True(t, reusableCache(variants[m[1]], variants[m[1]]), "match test %d", i)
|
|
require.True(t, reusableCache(variants[m[0]], variants[m[0]]), "match test %d", i)
|
|
}
|
|
for i, m := range noMatch {
|
|
require.False(t, reusableCache(variants[m[0]], variants[m[1]]), "not match test %d", i)
|
|
require.False(t, reusableCache(variants[m[1]], variants[m[0]]), "not match test %d", i)
|
|
}
|
|
}
|
|
|
|
func TestReuseScrapeCache(t *testing.T) {
|
|
var (
|
|
app = &nopAppendable{}
|
|
cfg = &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
ScrapeTimeout: model.Duration(5 * time.Second),
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
MetricsPath: "/metrics",
|
|
}
|
|
sp, _ = newScrapePool(cfg, app, 0, nil, nil, &Options{}, newTestScrapeMetrics(t))
|
|
t1 = &Target{
|
|
discoveredLabels: labels.FromStrings("labelNew", "nameNew", "labelNew1", "nameNew1", "labelNew2", "nameNew2"),
|
|
}
|
|
proxyURL, _ = url.Parse("http://localhost:2128")
|
|
)
|
|
defer sp.stop()
|
|
sp.sync([]*Target{t1})
|
|
|
|
steps := []struct {
|
|
keep bool
|
|
newConfig *config.ScrapeConfig
|
|
}{
|
|
{
|
|
keep: true,
|
|
newConfig: &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
ScrapeTimeout: model.Duration(5 * time.Second),
|
|
MetricsPath: "/metrics",
|
|
},
|
|
},
|
|
{
|
|
keep: false,
|
|
newConfig: &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
ScrapeTimeout: model.Duration(15 * time.Second),
|
|
MetricsPath: "/metrics2",
|
|
},
|
|
},
|
|
{
|
|
keep: true,
|
|
newConfig: &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
SampleLimit: 400,
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
ScrapeTimeout: model.Duration(15 * time.Second),
|
|
MetricsPath: "/metrics2",
|
|
},
|
|
},
|
|
{
|
|
keep: false,
|
|
newConfig: &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
HonorTimestamps: true,
|
|
SampleLimit: 400,
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
ScrapeTimeout: model.Duration(15 * time.Second),
|
|
MetricsPath: "/metrics2",
|
|
},
|
|
},
|
|
{
|
|
keep: true,
|
|
newConfig: &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
HonorTimestamps: true,
|
|
SampleLimit: 400,
|
|
HTTPClientConfig: config_util.HTTPClientConfig{
|
|
ProxyConfig: config_util.ProxyConfig{ProxyURL: config_util.URL{URL: proxyURL}},
|
|
},
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
ScrapeTimeout: model.Duration(15 * time.Second),
|
|
MetricsPath: "/metrics2",
|
|
},
|
|
},
|
|
{
|
|
keep: false,
|
|
newConfig: &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
HonorTimestamps: true,
|
|
HonorLabels: true,
|
|
SampleLimit: 400,
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
ScrapeTimeout: model.Duration(15 * time.Second),
|
|
MetricsPath: "/metrics2",
|
|
},
|
|
},
|
|
{
|
|
keep: false,
|
|
newConfig: &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
ScrapeTimeout: model.Duration(15 * time.Second),
|
|
MetricsPath: "/metrics",
|
|
LabelLimit: 1,
|
|
},
|
|
},
|
|
{
|
|
keep: false,
|
|
newConfig: &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
ScrapeTimeout: model.Duration(15 * time.Second),
|
|
MetricsPath: "/metrics",
|
|
LabelLimit: 15,
|
|
},
|
|
},
|
|
{
|
|
keep: false,
|
|
newConfig: &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
ScrapeTimeout: model.Duration(15 * time.Second),
|
|
MetricsPath: "/metrics",
|
|
LabelLimit: 15,
|
|
LabelNameLengthLimit: 5,
|
|
},
|
|
},
|
|
{
|
|
keep: false,
|
|
newConfig: &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
ScrapeTimeout: model.Duration(15 * time.Second),
|
|
MetricsPath: "/metrics",
|
|
LabelLimit: 15,
|
|
LabelNameLengthLimit: 5,
|
|
LabelValueLengthLimit: 7,
|
|
},
|
|
},
|
|
}
|
|
|
|
cacheAddr := func(sp *scrapePool) map[uint64]string {
|
|
r := make(map[uint64]string)
|
|
for fp, l := range sp.loops {
|
|
r[fp] = fmt.Sprintf("%p", l.getCache())
|
|
}
|
|
return r
|
|
}
|
|
|
|
for i, s := range steps {
|
|
initCacheAddr := cacheAddr(sp)
|
|
sp.reload(s.newConfig)
|
|
for fp, newCacheAddr := range cacheAddr(sp) {
|
|
if s.keep {
|
|
require.Equal(t, initCacheAddr[fp], newCacheAddr, "step %d: old cache and new cache are not the same", i)
|
|
} else {
|
|
require.NotEqual(t, initCacheAddr[fp], newCacheAddr, "step %d: old cache and new cache are the same", i)
|
|
}
|
|
}
|
|
initCacheAddr = cacheAddr(sp)
|
|
sp.reload(s.newConfig)
|
|
for fp, newCacheAddr := range cacheAddr(sp) {
|
|
require.Equal(t, initCacheAddr[fp], newCacheAddr, "step %d: reloading the exact config invalidates the cache", i)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestScrapeAddFast(t *testing.T) {
|
|
s := teststorage.New(t)
|
|
defer s.Close()
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, ctx, &testScraper{}, s.Appender, 0)
|
|
defer cancel()
|
|
|
|
slApp := sl.appender(ctx)
|
|
_, _, _, err := sl.append(slApp, []byte("up 1\n"), "", time.Time{})
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
|
|
// Poison the cache. There is just one entry, and one series in the
|
|
// storage. Changing the ref will create a 'not found' error.
|
|
for _, v := range sl.getCache().series {
|
|
v.ref++
|
|
}
|
|
|
|
slApp = sl.appender(ctx)
|
|
_, _, _, err = sl.append(slApp, []byte("up 1\n"), "", time.Time{}.Add(time.Second))
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
}
|
|
|
|
func TestReuseCacheRace(t *testing.T) {
|
|
var (
|
|
app = &nopAppendable{}
|
|
cfg = &config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
ScrapeTimeout: model.Duration(5 * time.Second),
|
|
ScrapeInterval: model.Duration(5 * time.Second),
|
|
MetricsPath: "/metrics",
|
|
}
|
|
buffers = pool.New(1e3, 100e6, 3, func(sz int) interface{} { return make([]byte, 0, sz) })
|
|
sp, _ = newScrapePool(cfg, app, 0, nil, buffers, &Options{}, newTestScrapeMetrics(t))
|
|
t1 = &Target{
|
|
discoveredLabels: labels.FromStrings("labelNew", "nameNew"),
|
|
}
|
|
)
|
|
defer sp.stop()
|
|
sp.sync([]*Target{t1})
|
|
|
|
start := time.Now()
|
|
for i := uint(1); i > 0; i++ {
|
|
if time.Since(start) > 5*time.Second {
|
|
break
|
|
}
|
|
sp.reload(&config.ScrapeConfig{
|
|
JobName: "Prometheus",
|
|
ScrapeTimeout: model.Duration(1 * time.Millisecond),
|
|
ScrapeInterval: model.Duration(1 * time.Millisecond),
|
|
MetricsPath: "/metrics",
|
|
SampleLimit: i,
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestCheckAddError(t *testing.T) {
|
|
var appErrs appendErrors
|
|
sl := scrapeLoop{l: log.NewNopLogger(), metrics: newTestScrapeMetrics(t)}
|
|
sl.checkAddError(nil, nil, nil, storage.ErrOutOfOrderSample, nil, nil, &appErrs)
|
|
require.Equal(t, 1, appErrs.numOutOfOrder)
|
|
}
|
|
|
|
func TestScrapeReportSingleAppender(t *testing.T) {
|
|
s := teststorage.New(t)
|
|
defer s.Close()
|
|
|
|
var (
|
|
signal = make(chan struct{}, 1)
|
|
scraper = &testScraper{}
|
|
)
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, ctx, scraper, s.Appender, 10*time.Millisecond)
|
|
|
|
numScrapes := 0
|
|
|
|
scraper.scrapeFunc = func(ctx context.Context, w io.Writer) error {
|
|
numScrapes++
|
|
if numScrapes%4 == 0 {
|
|
return fmt.Errorf("scrape failed")
|
|
}
|
|
w.Write([]byte("metric_a 44\nmetric_b 44\nmetric_c 44\nmetric_d 44\n"))
|
|
return nil
|
|
}
|
|
|
|
go func() {
|
|
sl.run(nil)
|
|
signal <- struct{}{}
|
|
}()
|
|
|
|
start := time.Now()
|
|
for time.Since(start) < 3*time.Second {
|
|
q, err := s.Querier(time.Time{}.UnixNano(), time.Now().UnixNano())
|
|
require.NoError(t, err)
|
|
series := q.Select(ctx, false, nil, labels.MustNewMatcher(labels.MatchRegexp, "__name__", ".+"))
|
|
|
|
c := 0
|
|
for series.Next() {
|
|
i := series.At().Iterator(nil)
|
|
for i.Next() != chunkenc.ValNone {
|
|
c++
|
|
}
|
|
}
|
|
|
|
require.Equal(t, 0, c%9, "Appended samples not as expected: %d", c)
|
|
q.Close()
|
|
}
|
|
cancel()
|
|
|
|
select {
|
|
case <-signal:
|
|
case <-time.After(5 * time.Second):
|
|
require.FailNow(t, "Scrape wasn't stopped.")
|
|
}
|
|
}
|
|
|
|
func TestScrapeReportLimit(t *testing.T) {
|
|
s := teststorage.New(t)
|
|
defer s.Close()
|
|
|
|
cfg := &config.ScrapeConfig{
|
|
JobName: "test",
|
|
SampleLimit: 5,
|
|
Scheme: "http",
|
|
ScrapeInterval: model.Duration(100 * time.Millisecond),
|
|
ScrapeTimeout: model.Duration(100 * time.Millisecond),
|
|
}
|
|
|
|
var (
|
|
scrapes int
|
|
scrapedTwice = make(chan bool)
|
|
)
|
|
|
|
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
fmt.Fprint(w, "metric_a 44\nmetric_b 44\nmetric_c 44\nmetric_d 44\n")
|
|
scrapes++
|
|
if scrapes == 2 {
|
|
close(scrapedTwice)
|
|
}
|
|
}))
|
|
defer ts.Close()
|
|
|
|
sp, err := newScrapePool(cfg, s, 0, nil, nil, &Options{}, newTestScrapeMetrics(t))
|
|
require.NoError(t, err)
|
|
defer sp.stop()
|
|
|
|
testURL, err := url.Parse(ts.URL)
|
|
require.NoError(t, err)
|
|
sp.Sync([]*targetgroup.Group{
|
|
{
|
|
Targets: []model.LabelSet{{model.AddressLabel: model.LabelValue(testURL.Host)}},
|
|
},
|
|
})
|
|
|
|
select {
|
|
case <-time.After(5 * time.Second):
|
|
t.Fatalf("target was not scraped twice")
|
|
case <-scrapedTwice:
|
|
// If the target has been scraped twice, report samples from the first
|
|
// scrape have been inserted in the database.
|
|
}
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
q, err := s.Querier(time.Time{}.UnixNano(), time.Now().UnixNano())
|
|
require.NoError(t, err)
|
|
defer q.Close()
|
|
series := q.Select(ctx, false, nil, labels.MustNewMatcher(labels.MatchRegexp, "__name__", "up"))
|
|
|
|
var found bool
|
|
for series.Next() {
|
|
i := series.At().Iterator(nil)
|
|
for i.Next() == chunkenc.ValFloat {
|
|
_, v := i.At()
|
|
require.Equal(t, 1.0, v)
|
|
found = true
|
|
}
|
|
}
|
|
|
|
require.True(t, found)
|
|
}
|
|
|
|
func TestScrapeLoopLabelLimit(t *testing.T) {
|
|
tests := []struct {
|
|
title string
|
|
scrapeLabels string
|
|
discoveryLabels []string
|
|
labelLimits labelLimits
|
|
expectErr bool
|
|
}{
|
|
{
|
|
title: "Valid number of labels",
|
|
scrapeLabels: `metric{l1="1", l2="2"} 0`,
|
|
discoveryLabels: nil,
|
|
labelLimits: labelLimits{labelLimit: 5},
|
|
expectErr: false,
|
|
}, {
|
|
title: "Too many labels",
|
|
scrapeLabels: `metric{l1="1", l2="2", l3="3", l4="4", l5="5", l6="6"} 0`,
|
|
discoveryLabels: nil,
|
|
labelLimits: labelLimits{labelLimit: 5},
|
|
expectErr: true,
|
|
}, {
|
|
title: "Too many labels including discovery labels",
|
|
scrapeLabels: `metric{l1="1", l2="2", l3="3", l4="4"} 0`,
|
|
discoveryLabels: []string{"l5", "5", "l6", "6"},
|
|
labelLimits: labelLimits{labelLimit: 5},
|
|
expectErr: true,
|
|
}, {
|
|
title: "Valid labels name length",
|
|
scrapeLabels: `metric{l1="1", l2="2"} 0`,
|
|
discoveryLabels: nil,
|
|
labelLimits: labelLimits{labelNameLengthLimit: 10},
|
|
expectErr: false,
|
|
}, {
|
|
title: "Label name too long",
|
|
scrapeLabels: `metric{label_name_too_long="0"} 0`,
|
|
discoveryLabels: nil,
|
|
labelLimits: labelLimits{labelNameLengthLimit: 10},
|
|
expectErr: true,
|
|
}, {
|
|
title: "Discovery label name too long",
|
|
scrapeLabels: `metric{l1="1", l2="2"} 0`,
|
|
discoveryLabels: []string{"label_name_too_long", "0"},
|
|
labelLimits: labelLimits{labelNameLengthLimit: 10},
|
|
expectErr: true,
|
|
}, {
|
|
title: "Valid labels value length",
|
|
scrapeLabels: `metric{l1="1", l2="2"} 0`,
|
|
discoveryLabels: nil,
|
|
labelLimits: labelLimits{labelValueLengthLimit: 10},
|
|
expectErr: false,
|
|
}, {
|
|
title: "Label value too long",
|
|
scrapeLabels: `metric{l1="label_value_too_long"} 0`,
|
|
discoveryLabels: nil,
|
|
labelLimits: labelLimits{labelValueLengthLimit: 10},
|
|
expectErr: true,
|
|
}, {
|
|
title: "Discovery label value too long",
|
|
scrapeLabels: `metric{l1="1", l2="2"} 0`,
|
|
discoveryLabels: []string{"l1", "label_value_too_long"},
|
|
labelLimits: labelLimits{labelValueLengthLimit: 10},
|
|
expectErr: true,
|
|
},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
app := &collectResultAppender{}
|
|
|
|
discoveryLabels := &Target{
|
|
labels: labels.FromStrings(test.discoveryLabels...),
|
|
}
|
|
|
|
sl := newBasicScrapeLoop(t, context.Background(), nil, func(ctx context.Context) storage.Appender { return app }, 0)
|
|
sl.sampleMutator = func(l labels.Labels) labels.Labels {
|
|
return mutateSampleLabels(l, discoveryLabels, false, nil)
|
|
}
|
|
sl.reportSampleMutator = func(l labels.Labels) labels.Labels {
|
|
return mutateReportSampleLabels(l, discoveryLabels)
|
|
}
|
|
sl.labelLimits = &test.labelLimits
|
|
|
|
slApp := sl.appender(context.Background())
|
|
_, _, _, err := sl.append(slApp, []byte(test.scrapeLabels), "", time.Now())
|
|
|
|
t.Logf("Test:%s", test.title)
|
|
if test.expectErr {
|
|
require.Error(t, err)
|
|
} else {
|
|
require.NoError(t, err)
|
|
require.NoError(t, slApp.Commit())
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestTargetScrapeIntervalAndTimeoutRelabel(t *testing.T) {
|
|
interval, _ := model.ParseDuration("2s")
|
|
timeout, _ := model.ParseDuration("500ms")
|
|
config := &config.ScrapeConfig{
|
|
ScrapeInterval: interval,
|
|
ScrapeTimeout: timeout,
|
|
RelabelConfigs: []*relabel.Config{
|
|
{
|
|
SourceLabels: model.LabelNames{model.ScrapeIntervalLabel},
|
|
Regex: relabel.MustNewRegexp("2s"),
|
|
Replacement: "3s",
|
|
TargetLabel: model.ScrapeIntervalLabel,
|
|
Action: relabel.Replace,
|
|
},
|
|
{
|
|
SourceLabels: model.LabelNames{model.ScrapeTimeoutLabel},
|
|
Regex: relabel.MustNewRegexp("500ms"),
|
|
Replacement: "750ms",
|
|
TargetLabel: model.ScrapeTimeoutLabel,
|
|
Action: relabel.Replace,
|
|
},
|
|
},
|
|
}
|
|
sp, _ := newScrapePool(config, &nopAppendable{}, 0, nil, nil, &Options{}, newTestScrapeMetrics(t))
|
|
tgts := []*targetgroup.Group{
|
|
{
|
|
Targets: []model.LabelSet{{model.AddressLabel: "127.0.0.1:9090"}},
|
|
},
|
|
}
|
|
|
|
sp.Sync(tgts)
|
|
defer sp.stop()
|
|
|
|
require.Equal(t, "3s", sp.ActiveTargets()[0].labels.Get(model.ScrapeIntervalLabel))
|
|
require.Equal(t, "750ms", sp.ActiveTargets()[0].labels.Get(model.ScrapeTimeoutLabel))
|
|
}
|
|
|
|
// Testing whether we can remove trailing .0 from histogram 'le' and summary 'quantile' labels.
|
|
func TestLeQuantileReLabel(t *testing.T) {
|
|
simpleStorage := teststorage.New(t)
|
|
defer simpleStorage.Close()
|
|
|
|
config := &config.ScrapeConfig{
|
|
JobName: "test",
|
|
MetricRelabelConfigs: []*relabel.Config{
|
|
{
|
|
SourceLabels: model.LabelNames{"le", "__name__"},
|
|
Regex: relabel.MustNewRegexp("(\\d+)\\.0+;.*_bucket"),
|
|
Replacement: relabel.DefaultRelabelConfig.Replacement,
|
|
Separator: relabel.DefaultRelabelConfig.Separator,
|
|
TargetLabel: "le",
|
|
Action: relabel.Replace,
|
|
},
|
|
{
|
|
SourceLabels: model.LabelNames{"quantile"},
|
|
Regex: relabel.MustNewRegexp("(\\d+)\\.0+"),
|
|
Replacement: relabel.DefaultRelabelConfig.Replacement,
|
|
Separator: relabel.DefaultRelabelConfig.Separator,
|
|
TargetLabel: "quantile",
|
|
Action: relabel.Replace,
|
|
},
|
|
},
|
|
SampleLimit: 100,
|
|
Scheme: "http",
|
|
ScrapeInterval: model.Duration(100 * time.Millisecond),
|
|
ScrapeTimeout: model.Duration(100 * time.Millisecond),
|
|
}
|
|
|
|
metricsText := `
|
|
# HELP test_histogram This is a histogram with default buckets
|
|
# TYPE test_histogram histogram
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="0.005"} 0
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="0.01"} 0
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="0.025"} 0
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="0.05"} 0
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="0.1"} 0
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="0.25"} 0
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="0.5"} 0
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="1.0"} 0
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="2.5"} 0
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="5.0"} 0
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="10.0"} 0
|
|
test_histogram_bucket{address="0.0.0.0",port="5001",le="+Inf"} 0
|
|
test_histogram_sum{address="0.0.0.0",port="5001"} 0
|
|
test_histogram_count{address="0.0.0.0",port="5001"} 0
|
|
# HELP test_summary Number of inflight requests sampled at a regular interval. Quantile buckets keep track of inflight requests over the last 60s.
|
|
# TYPE test_summary summary
|
|
test_summary{quantile="0.5"} 0
|
|
test_summary{quantile="0.9"} 0
|
|
test_summary{quantile="0.95"} 0
|
|
test_summary{quantile="0.99"} 0
|
|
test_summary{quantile="1.0"} 1
|
|
test_summary_sum 1
|
|
test_summary_count 199
|
|
`
|
|
|
|
// The expected "le" values do not have the trailing ".0".
|
|
expectedLeValues := []string{"0.005", "0.01", "0.025", "0.05", "0.1", "0.25", "0.5", "1", "2.5", "5", "10", "+Inf"}
|
|
|
|
// The expected "quantile" values do not have the trailing ".0".
|
|
expectedQuantileValues := []string{"0.5", "0.9", "0.95", "0.99", "1"}
|
|
|
|
scrapeCount := 0
|
|
scraped := make(chan bool)
|
|
|
|
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
fmt.Fprint(w, metricsText)
|
|
scrapeCount++
|
|
if scrapeCount > 2 {
|
|
close(scraped)
|
|
}
|
|
}))
|
|
defer ts.Close()
|
|
|
|
sp, err := newScrapePool(config, simpleStorage, 0, nil, nil, &Options{}, newTestScrapeMetrics(t))
|
|
require.NoError(t, err)
|
|
defer sp.stop()
|
|
|
|
testURL, err := url.Parse(ts.URL)
|
|
require.NoError(t, err)
|
|
sp.Sync([]*targetgroup.Group{
|
|
{
|
|
Targets: []model.LabelSet{{model.AddressLabel: model.LabelValue(testURL.Host)}},
|
|
},
|
|
})
|
|
require.Len(t, sp.ActiveTargets(), 1)
|
|
|
|
select {
|
|
case <-time.After(5 * time.Second):
|
|
t.Fatalf("target was not scraped")
|
|
case <-scraped:
|
|
}
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
q, err := simpleStorage.Querier(time.Time{}.UnixNano(), time.Now().UnixNano())
|
|
require.NoError(t, err)
|
|
defer q.Close()
|
|
|
|
checkValues := func(labelName string, expectedValues []string, series storage.SeriesSet) {
|
|
foundLeValues := map[string]bool{}
|
|
|
|
for series.Next() {
|
|
s := series.At()
|
|
v := s.Labels().Get(labelName)
|
|
require.NotContains(t, foundLeValues, v, "duplicate label value found")
|
|
foundLeValues[v] = true
|
|
}
|
|
|
|
require.Equal(t, len(expectedValues), len(foundLeValues), "number of label values not as expected")
|
|
for _, v := range expectedValues {
|
|
require.Contains(t, foundLeValues, v, "label value not found")
|
|
}
|
|
}
|
|
|
|
series := q.Select(ctx, false, nil, labels.MustNewMatcher(labels.MatchRegexp, "__name__", "test_histogram_bucket"))
|
|
checkValues("le", expectedLeValues, series)
|
|
|
|
series = q.Select(ctx, false, nil, labels.MustNewMatcher(labels.MatchRegexp, "__name__", "test_summary"))
|
|
checkValues("quantile", expectedQuantileValues, series)
|
|
}
|
|
|
|
func TestScrapeLoopRunCreatesStaleMarkersOnFailedScrapeForTimestampedMetrics(t *testing.T) {
|
|
appender := &collectResultAppender{}
|
|
var (
|
|
signal = make(chan struct{}, 1)
|
|
scraper = &testScraper{}
|
|
app = func(ctx context.Context) storage.Appender { return appender }
|
|
)
|
|
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
sl := newBasicScrapeLoop(t, ctx, scraper, app, 10*time.Millisecond)
|
|
sl.trackTimestampsStaleness = true
|
|
// Succeed once, several failures, then stop.
|
|
numScrapes := 0
|
|
|
|
scraper.scrapeFunc = func(ctx context.Context, w io.Writer) error {
|
|
numScrapes++
|
|
|
|
switch numScrapes {
|
|
case 1:
|
|
w.Write([]byte(fmt.Sprintf("metric_a 42 %d\n", time.Now().UnixNano()/int64(time.Millisecond))))
|
|
return nil
|
|
case 5:
|
|
cancel()
|
|
}
|
|
return errors.New("scrape failed")
|
|
}
|
|
|
|
go func() {
|
|
sl.run(nil)
|
|
signal <- struct{}{}
|
|
}()
|
|
|
|
select {
|
|
case <-signal:
|
|
case <-time.After(5 * time.Second):
|
|
t.Fatalf("Scrape wasn't stopped.")
|
|
}
|
|
|
|
// 1 successfully scraped sample, 1 stale marker after first fail, 5 report samples for
|
|
// each scrape successful or not.
|
|
require.Len(t, appender.resultFloats, 27, "Appended samples not as expected:\n%s", appender)
|
|
require.Equal(t, 42.0, appender.resultFloats[0].f, "Appended first sample not as expected")
|
|
require.True(t, value.IsStaleNaN(appender.resultFloats[6].f),
|
|
"Appended second sample not as expected. Wanted: stale NaN Got: %x", math.Float64bits(appender.resultFloats[6].f))
|
|
}
|
|
|
|
func TestScrapeLoopCompression(t *testing.T) {
|
|
simpleStorage := teststorage.New(t)
|
|
defer simpleStorage.Close()
|
|
|
|
metricsText := makeTestMetrics(10)
|
|
|
|
for _, tc := range []struct {
|
|
enableCompression bool
|
|
acceptEncoding string
|
|
}{
|
|
{
|
|
enableCompression: true,
|
|
acceptEncoding: "gzip",
|
|
},
|
|
{
|
|
enableCompression: false,
|
|
acceptEncoding: "identity",
|
|
},
|
|
} {
|
|
t.Run(fmt.Sprintf("compression=%v,acceptEncoding=%s", tc.enableCompression, tc.acceptEncoding), func(t *testing.T) {
|
|
scraped := make(chan bool)
|
|
|
|
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
require.Equal(t, tc.acceptEncoding, r.Header.Get("Accept-Encoding"), "invalid value of the Accept-Encoding header")
|
|
fmt.Fprint(w, metricsText)
|
|
close(scraped)
|
|
}))
|
|
defer ts.Close()
|
|
|
|
config := &config.ScrapeConfig{
|
|
JobName: "test",
|
|
SampleLimit: 100,
|
|
Scheme: "http",
|
|
ScrapeInterval: model.Duration(100 * time.Millisecond),
|
|
ScrapeTimeout: model.Duration(100 * time.Millisecond),
|
|
EnableCompression: tc.enableCompression,
|
|
}
|
|
|
|
sp, err := newScrapePool(config, simpleStorage, 0, nil, nil, &Options{}, newTestScrapeMetrics(t))
|
|
require.NoError(t, err)
|
|
defer sp.stop()
|
|
|
|
testURL, err := url.Parse(ts.URL)
|
|
require.NoError(t, err)
|
|
sp.Sync([]*targetgroup.Group{
|
|
{
|
|
Targets: []model.LabelSet{{model.AddressLabel: model.LabelValue(testURL.Host)}},
|
|
},
|
|
})
|
|
require.Len(t, sp.ActiveTargets(), 1)
|
|
|
|
select {
|
|
case <-time.After(5 * time.Second):
|
|
t.Fatalf("target was not scraped")
|
|
case <-scraped:
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestPickSchema(t *testing.T) {
|
|
tcs := []struct {
|
|
factor float64
|
|
schema int32
|
|
}{
|
|
{
|
|
factor: 65536,
|
|
schema: -4,
|
|
},
|
|
{
|
|
factor: 256,
|
|
schema: -3,
|
|
},
|
|
{
|
|
factor: 16,
|
|
schema: -2,
|
|
},
|
|
{
|
|
factor: 4,
|
|
schema: -1,
|
|
},
|
|
{
|
|
factor: 2,
|
|
schema: 0,
|
|
},
|
|
{
|
|
factor: 1.4,
|
|
schema: 1,
|
|
},
|
|
{
|
|
factor: 1.1,
|
|
schema: 2,
|
|
},
|
|
{
|
|
factor: 1.09,
|
|
schema: 3,
|
|
},
|
|
{
|
|
factor: 1.04,
|
|
schema: 4,
|
|
},
|
|
{
|
|
factor: 1.02,
|
|
schema: 5,
|
|
},
|
|
{
|
|
factor: 1.01,
|
|
schema: 6,
|
|
},
|
|
{
|
|
factor: 1.005,
|
|
schema: 7,
|
|
},
|
|
{
|
|
factor: 1.002,
|
|
schema: 8,
|
|
},
|
|
// The default value of native_histogram_min_bucket_factor
|
|
{
|
|
factor: 0,
|
|
schema: 8,
|
|
},
|
|
}
|
|
|
|
for _, tc := range tcs {
|
|
schema := pickSchema(tc.factor)
|
|
require.Equal(t, tc.schema, schema)
|
|
}
|
|
}
|
|
|
|
func BenchmarkTargetScraperGzip(b *testing.B) {
|
|
scenarios := []struct {
|
|
metricsCount int
|
|
body []byte
|
|
}{
|
|
{metricsCount: 1},
|
|
{metricsCount: 100},
|
|
{metricsCount: 1000},
|
|
{metricsCount: 10000},
|
|
{metricsCount: 100000},
|
|
}
|
|
|
|
for i := 0; i < len(scenarios); i++ {
|
|
var buf bytes.Buffer
|
|
var name string
|
|
gw := gzip.NewWriter(&buf)
|
|
for j := 0; j < scenarios[i].metricsCount; j++ {
|
|
name = fmt.Sprintf("go_memstats_alloc_bytes_total_%d", j)
|
|
fmt.Fprintf(gw, "# HELP %s Total number of bytes allocated, even if freed.\n", name)
|
|
fmt.Fprintf(gw, "# TYPE %s counter\n", name)
|
|
fmt.Fprintf(gw, "%s %d\n", name, i*j)
|
|
}
|
|
gw.Close()
|
|
scenarios[i].body = buf.Bytes()
|
|
}
|
|
|
|
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
w.Header().Set("Content-Type", `text/plain; version=0.0.4`)
|
|
w.Header().Set("Content-Encoding", "gzip")
|
|
for _, scenario := range scenarios {
|
|
if strconv.Itoa(scenario.metricsCount) == r.URL.Query()["count"][0] {
|
|
w.Write(scenario.body)
|
|
return
|
|
}
|
|
}
|
|
w.WriteHeader(http.StatusBadRequest)
|
|
})
|
|
|
|
server := httptest.NewServer(handler)
|
|
defer server.Close()
|
|
|
|
serverURL, err := url.Parse(server.URL)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
client, err := config_util.NewClientFromConfig(config_util.DefaultHTTPClientConfig, "test_job")
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
for _, scenario := range scenarios {
|
|
b.Run(fmt.Sprintf("metrics=%d", scenario.metricsCount), func(b *testing.B) {
|
|
ts := &targetScraper{
|
|
Target: &Target{
|
|
labels: labels.FromStrings(
|
|
model.SchemeLabel, serverURL.Scheme,
|
|
model.AddressLabel, serverURL.Host,
|
|
),
|
|
params: url.Values{"count": []string{strconv.Itoa(scenario.metricsCount)}},
|
|
},
|
|
client: client,
|
|
timeout: time.Second,
|
|
}
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
_, err = ts.scrape(context.Background())
|
|
require.NoError(b, err)
|
|
}
|
|
})
|
|
}
|
|
}
|