// Copyright 2013 The Prometheus Authors // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package rules import ( "context" "fmt" "io/fs" "math" "os" "path" "sort" "testing" "time" "github.com/go-kit/log" "github.com/prometheus/client_golang/prometheus" "github.com/prometheus/common/model" "github.com/stretchr/testify/require" "go.uber.org/atomic" "go.uber.org/goleak" "gopkg.in/yaml.v2" "github.com/prometheus/prometheus/model/histogram" "github.com/prometheus/prometheus/model/labels" "github.com/prometheus/prometheus/model/rulefmt" "github.com/prometheus/prometheus/model/timestamp" "github.com/prometheus/prometheus/model/value" "github.com/prometheus/prometheus/promql" "github.com/prometheus/prometheus/promql/parser" "github.com/prometheus/prometheus/storage" "github.com/prometheus/prometheus/tsdb" "github.com/prometheus/prometheus/tsdb/chunkenc" "github.com/prometheus/prometheus/util/teststorage" ) func TestMain(m *testing.M) { goleak.VerifyTestMain(m) } func TestAlertingRule(t *testing.T) { suite, err := promql.NewTest(t, ` load 5m http_requests{job="app-server", instance="0", group="canary", severity="overwrite-me"} 75 85 95 105 105 95 85 http_requests{job="app-server", instance="1", group="canary", severity="overwrite-me"} 80 90 100 110 120 130 140 `) require.NoError(t, err) defer suite.Close() err = suite.Run() require.NoError(t, err) expr, err := parser.ParseExpr(`http_requests{group="canary", job="app-server"} < 100`) require.NoError(t, err) rule := NewAlertingRule( "HTTPRequestRateLow", expr, time.Minute, labels.FromStrings("severity", "{{\"c\"}}ritical"), labels.EmptyLabels(), labels.EmptyLabels(), "", true, nil, ) result := promql.Vector{ promql.Sample{ Metric: labels.FromStrings( "__name__", "ALERTS", "alertname", "HTTPRequestRateLow", "alertstate", "pending", "group", "canary", "instance", "0", "job", "app-server", "severity", "critical", ), Point: promql.Point{V: 1}, }, promql.Sample{ Metric: labels.FromStrings( "__name__", "ALERTS", "alertname", "HTTPRequestRateLow", "alertstate", "pending", "group", "canary", "instance", "1", "job", "app-server", "severity", "critical", ), Point: promql.Point{V: 1}, }, promql.Sample{ Metric: labels.FromStrings( "__name__", "ALERTS", "alertname", "HTTPRequestRateLow", "alertstate", "firing", "group", "canary", "instance", "0", "job", "app-server", "severity", "critical", ), Point: promql.Point{V: 1}, }, promql.Sample{ Metric: labels.FromStrings( "__name__", "ALERTS", "alertname", "HTTPRequestRateLow", "alertstate", "firing", "group", "canary", "instance", "1", "job", "app-server", "severity", "critical", ), Point: promql.Point{V: 1}, }, } baseTime := time.Unix(0, 0) tests := []struct { time time.Duration result promql.Vector }{ { time: 0, result: result[:2], }, { time: 5 * time.Minute, result: result[2:], }, { time: 10 * time.Minute, result: result[2:3], }, { time: 15 * time.Minute, result: nil, }, { time: 20 * time.Minute, result: nil, }, { time: 25 * time.Minute, result: result[:1], }, { time: 30 * time.Minute, result: result[2:3], }, } for i, test := range tests { t.Logf("case %d", i) evalTime := baseTime.Add(test.time) res, err := rule.Eval(suite.Context(), 0, evalTime, EngineQueryFunc(suite.QueryEngine(), suite.Storage()), nil, 0) require.NoError(t, err) var filteredRes promql.Vector // After removing 'ALERTS_FOR_STATE' samples. for _, smpl := range res { smplName := smpl.Metric.Get("__name__") if smplName == "ALERTS" { filteredRes = append(filteredRes, smpl) } else { // If not 'ALERTS', it has to be 'ALERTS_FOR_STATE'. require.Equal(t, smplName, "ALERTS_FOR_STATE") } } for i := range test.result { test.result[i].T = timestamp.FromTime(evalTime) } require.Equal(t, len(test.result), len(filteredRes), "%d. Number of samples in expected and actual output don't match (%d vs. %d)", i, len(test.result), len(res)) sort.Slice(filteredRes, func(i, j int) bool { return labels.Compare(filteredRes[i].Metric, filteredRes[j].Metric) < 0 }) require.Equal(t, test.result, filteredRes) for _, aa := range rule.ActiveAlerts() { require.Zero(t, aa.Labels.Get(model.MetricNameLabel), "%s label set on active alert: %s", model.MetricNameLabel, aa.Labels) } } } func TestForStateAddSamples(t *testing.T) { for _, evalDelay := range []time.Duration{0, time.Minute} { t.Run(fmt.Sprintf("evalDelay %s", evalDelay.String()), func(t *testing.T) { suite, err := promql.NewTest(t, ` load 5m http_requests{job="app-server", instance="0", group="canary", severity="overwrite-me"} 75 85 95 105 105 95 85 http_requests{job="app-server", instance="1", group="canary", severity="overwrite-me"} 80 90 100 110 120 130 140 `) require.NoError(t, err) defer suite.Close() err = suite.Run() require.NoError(t, err) expr, err := parser.ParseExpr(`http_requests{group="canary", job="app-server"} < 100`) require.NoError(t, err) rule := NewAlertingRule( "HTTPRequestRateLow", expr, time.Minute, labels.FromStrings("severity", "{{\"c\"}}ritical"), labels.EmptyLabels(), labels.EmptyLabels(), "", true, nil, ) result := promql.Vector{ promql.Sample{ Metric: labels.FromStrings( "__name__", "ALERTS_FOR_STATE", "alertname", "HTTPRequestRateLow", "group", "canary", "instance", "0", "job", "app-server", "severity", "critical", ), Point: promql.Point{V: 1}, }, promql.Sample{ Metric: labels.FromStrings( "__name__", "ALERTS_FOR_STATE", "alertname", "HTTPRequestRateLow", "group", "canary", "instance", "1", "job", "app-server", "severity", "critical", ), Point: promql.Point{V: 1}, }, promql.Sample{ Metric: labels.FromStrings( "__name__", "ALERTS_FOR_STATE", "alertname", "HTTPRequestRateLow", "group", "canary", "instance", "0", "job", "app-server", "severity", "critical", ), Point: promql.Point{V: 1}, }, promql.Sample{ Metric: labels.FromStrings( "__name__", "ALERTS_FOR_STATE", "alertname", "HTTPRequestRateLow", "group", "canary", "instance", "1", "job", "app-server", "severity", "critical", ), Point: promql.Point{V: 1}, }, } baseTime := time.Unix(0, 0) tests := []struct { time time.Duration result promql.Vector persistThisTime bool // If true, it means this 'time' is persisted for 'for'. }{ { time: 0, result: append(promql.Vector{}, result[:2]...), persistThisTime: true, }, { time: 5 * time.Minute, result: append(promql.Vector{}, result[2:]...), }, { time: 10 * time.Minute, result: append(promql.Vector{}, result[2:3]...), }, { time: 15 * time.Minute, result: nil, }, { time: 20 * time.Minute, result: nil, }, { time: 25 * time.Minute, result: append(promql.Vector{}, result[:1]...), persistThisTime: true, }, { time: 30 * time.Minute, result: append(promql.Vector{}, result[2:3]...), }, } var forState float64 for i, test := range tests { t.Logf("case %d", i) evalTime := baseTime.Add(test.time).Add(evalDelay) if test.persistThisTime { forState = float64(evalTime.Unix()) } if test.result == nil { forState = float64(value.StaleNaN) } res, err := rule.Eval(suite.Context(), evalDelay, evalTime, EngineQueryFunc(suite.QueryEngine(), suite.Storage()), nil, 0) require.NoError(t, err) var filteredRes promql.Vector // After removing 'ALERTS' samples. for _, smpl := range res { smplName := smpl.Metric.Get("__name__") if smplName == "ALERTS_FOR_STATE" { filteredRes = append(filteredRes, smpl) } else { // If not 'ALERTS_FOR_STATE', it has to be 'ALERTS'. require.Equal(t, smplName, "ALERTS") } } for i := range test.result { test.result[i].T = timestamp.FromTime(evalTime.Add(-evalDelay)) // Updating the expected 'for' state. if test.result[i].V >= 0 { test.result[i].V = forState } } require.Equal(t, len(test.result), len(filteredRes), "%d. Number of samples in expected and actual output don't match (%d vs. %d)", i, len(test.result), len(res)) sort.Slice(filteredRes, func(i, j int) bool { return labels.Compare(filteredRes[i].Metric, filteredRes[j].Metric) < 0 }) require.Equal(t, test.result, filteredRes) for _, aa := range rule.ActiveAlerts() { require.Zero(t, aa.Labels.Get(model.MetricNameLabel), "%s label set on active alert: %s", model.MetricNameLabel, aa.Labels) } } }) } } // sortAlerts sorts `[]*Alert` w.r.t. the Labels. func sortAlerts(items []*Alert) { sort.Slice(items, func(i, j int) bool { return labels.Compare(items[i].Labels, items[j].Labels) <= 0 }) } func TestForStateRestore(t *testing.T) { suite, err := promql.NewTest(t, ` load 5m http_requests{job="app-server", instance="0", group="canary", severity="overwrite-me"} 75 85 50 0 0 25 0 0 40 0 120 http_requests{job="app-server", instance="1", group="canary", severity="overwrite-me"} 125 90 60 0 0 25 0 0 40 0 130 `) require.NoError(t, err) defer suite.Close() err = suite.Run() require.NoError(t, err) expr, err := parser.ParseExpr(`http_requests{group="canary", job="app-server"} < 100`) require.NoError(t, err) opts := &ManagerOptions{ QueryFunc: EngineQueryFunc(suite.QueryEngine(), suite.Storage()), Appendable: suite.Storage(), Queryable: suite.Storage(), Context: context.Background(), Logger: log.NewNopLogger(), NotifyFunc: func(ctx context.Context, expr string, alerts ...*Alert) {}, OutageTolerance: 30 * time.Minute, ForGracePeriod: 10 * time.Minute, } alertForDuration := 25 * time.Minute // Initial run before prometheus goes down. rule := NewAlertingRule( "HTTPRequestRateLow", expr, alertForDuration, labels.FromStrings("severity", "critical"), labels.EmptyLabels(), labels.EmptyLabels(), "", true, nil, ) group := NewGroup(GroupOptions{ Name: "default", Interval: time.Second, Rules: []Rule{rule}, ShouldRestore: true, Opts: opts, }) groups := make(map[string]*Group) groups["default;"] = group initialRuns := []time.Duration{0, 5 * time.Minute} baseTime := time.Unix(0, 0) for _, duration := range initialRuns { evalTime := baseTime.Add(duration) group.Eval(suite.Context(), evalTime) } exp := rule.ActiveAlerts() for _, aa := range exp { require.Zero(t, aa.Labels.Get(model.MetricNameLabel), "%s label set on active alert: %s", model.MetricNameLabel, aa.Labels) } sort.Slice(exp, func(i, j int) bool { return labels.Compare(exp[i].Labels, exp[j].Labels) < 0 }) // Prometheus goes down here. We create new rules and groups. type testInput struct { restoreDuration time.Duration alerts []*Alert num int noRestore bool gracePeriod bool downDuration time.Duration } tests := []testInput{ { // Normal restore (alerts were not firing). restoreDuration: 15 * time.Minute, alerts: rule.ActiveAlerts(), downDuration: 10 * time.Minute, }, { // Testing Outage Tolerance. restoreDuration: 40 * time.Minute, noRestore: true, num: 2, }, { // No active alerts. restoreDuration: 50 * time.Minute, alerts: []*Alert{}, }, } testFunc := func(tst testInput, evalDelay time.Duration) { newRule := NewAlertingRule( "HTTPRequestRateLow", expr, alertForDuration, labels.FromStrings("severity", "critical"), labels.EmptyLabels(), labels.EmptyLabels(), "", false, nil, ) newGroup := NewGroup(GroupOptions{ Name: "default", Interval: time.Second, Rules: []Rule{newRule}, ShouldRestore: true, Opts: opts, EvaluationDelay: &evalDelay, }) newGroups := make(map[string]*Group) newGroups["default;"] = newGroup restoreTime := baseTime.Add(tst.restoreDuration).Add(evalDelay) // First eval before restoration. newGroup.Eval(suite.Context(), restoreTime) // Restore happens here. newGroup.RestoreForState(restoreTime) got := newRule.ActiveAlerts() for _, aa := range got { require.Zero(t, aa.Labels.Get(model.MetricNameLabel), "%s label set on active alert: %s", model.MetricNameLabel, aa.Labels) } sort.Slice(got, func(i, j int) bool { return labels.Compare(got[i].Labels, got[j].Labels) < 0 }) // Checking if we have restored it correctly. if tst.noRestore { require.Equal(t, tst.num, len(got)) for _, e := range got { require.Equal(t, e.ActiveAt, restoreTime) } } else if tst.gracePeriod { require.Equal(t, tst.num, len(got)) for _, e := range got { require.Equal(t, opts.ForGracePeriod, e.ActiveAt.Add(alertForDuration).Sub(restoreTime)) } } else { exp := tst.alerts require.Equal(t, len(exp), len(got)) sortAlerts(exp) sortAlerts(got) for i, e := range exp { require.Equal(t, e.Labels, got[i].Labels) // Difference in time should be within 1e6 ns, i.e. 1ms // (due to conversion between ns & ms, float64 & int64). activeAtDiff := evalDelay.Seconds() + float64(e.ActiveAt.Unix()+int64(tst.downDuration/time.Second)-got[i].ActiveAt.Unix()) require.Equal(t, 0.0, math.Abs(activeAtDiff), "'for' state restored time is wrong") } } } for _, evalDelay := range []time.Duration{0, time.Minute} { for _, tst := range tests { testFunc(tst, evalDelay) } } // Testing the grace period. for _, duration := range []time.Duration{10 * time.Minute, 15 * time.Minute, 20 * time.Minute} { evalTime := baseTime.Add(duration) group.Eval(suite.Context(), evalTime) } for _, evalDelay := range []time.Duration{0, time.Minute} { testFunc(testInput{ restoreDuration: 25 * time.Minute, alerts: []*Alert{}, gracePeriod: true, num: 2, }, evalDelay) } } func TestStaleness(t *testing.T) { for _, evalDelay := range []time.Duration{0, time.Minute} { st := teststorage.New(t) defer st.Close() engineOpts := promql.EngineOpts{ Logger: nil, Reg: nil, MaxSamples: 10, Timeout: 10 * time.Second, } engine := promql.NewEngine(engineOpts) opts := &ManagerOptions{ QueryFunc: EngineQueryFunc(engine, st), Appendable: st, Queryable: st, Context: context.Background(), Logger: log.NewNopLogger(), } expr, err := parser.ParseExpr("a + 1") require.NoError(t, err) rule := NewRecordingRule("a_plus_one", expr, labels.Labels{}) group := NewGroup(GroupOptions{ Name: "default", Interval: time.Second, Rules: []Rule{rule}, ShouldRestore: true, Opts: opts, EvaluationDelay: &evalDelay, }) // A time series that has two samples and then goes stale. app := st.Appender(context.Background()) app.Append(0, labels.FromStrings(model.MetricNameLabel, "a"), 0, 1) app.Append(0, labels.FromStrings(model.MetricNameLabel, "a"), 1000, 2) app.Append(0, labels.FromStrings(model.MetricNameLabel, "a"), 2000, math.Float64frombits(value.StaleNaN)) err = app.Commit() require.NoError(t, err) ctx := context.Background() // Execute 3 times, 1 second apart. group.Eval(ctx, time.Unix(0, 0).Add(evalDelay)) group.Eval(ctx, time.Unix(1, 0).Add(evalDelay)) group.Eval(ctx, time.Unix(2, 0).Add(evalDelay)) querier, err := st.Querier(context.Background(), 0, 2000) require.NoError(t, err) defer querier.Close() matcher, err := labels.NewMatcher(labels.MatchEqual, model.MetricNameLabel, "a_plus_one") require.NoError(t, err) set := querier.Select(false, nil, matcher) samples, err := readSeriesSet(set) require.NoError(t, err) metric := labels.FromStrings(model.MetricNameLabel, "a_plus_one").String() metricSample, ok := samples[metric] require.True(t, ok, "Series %s not returned.", metric) require.True(t, value.IsStaleNaN(metricSample[2].V), "Appended second sample not as expected. Wanted: stale NaN Got: %x", math.Float64bits(metricSample[2].V)) metricSample[2].V = 42 // require.Equal cannot handle NaN. want := map[string][]promql.Point{ metric: {{T: 0, V: 2}, {T: 1000, V: 3}, {T: 2000, V: 42}}, } require.Equal(t, want, samples) } } // Convert a SeriesSet into a form usable with require.Equal. func readSeriesSet(ss storage.SeriesSet) (map[string][]promql.Point, error) { result := map[string][]promql.Point{} var it chunkenc.Iterator for ss.Next() { series := ss.At() points := []promql.Point{} it := series.Iterator(it) for it.Next() == chunkenc.ValFloat { t, v := it.At() points = append(points, promql.Point{T: t, V: v}) } name := series.Labels().String() result[name] = points } return result, ss.Err() } func TestCopyState(t *testing.T) { oldGroup := &Group{ rules: []Rule{ NewAlertingRule("alert", nil, 0, labels.EmptyLabels(), labels.EmptyLabels(), labels.EmptyLabels(), "", true, nil), NewRecordingRule("rule1", nil, labels.EmptyLabels()), NewRecordingRule("rule2", nil, labels.EmptyLabels()), NewRecordingRule("rule3", nil, labels.FromStrings("l1", "v1")), NewRecordingRule("rule3", nil, labels.FromStrings("l1", "v2")), NewRecordingRule("rule3", nil, labels.FromStrings("l1", "v3")), NewAlertingRule("alert2", nil, 0, labels.FromStrings("l2", "v1"), labels.EmptyLabels(), labels.EmptyLabels(), "", true, nil), }, seriesInPreviousEval: []map[string]labels.Labels{ {}, {}, {}, {"r3a": labels.FromStrings("l1", "v1")}, {"r3b": labels.FromStrings("l1", "v2")}, {"r3c": labels.FromStrings("l1", "v3")}, {"a2": labels.FromStrings("l2", "v1")}, }, evaluationTime: time.Second, } oldGroup.rules[0].(*AlertingRule).active[42] = nil newGroup := &Group{ rules: []Rule{ NewRecordingRule("rule3", nil, labels.FromStrings("l1", "v0")), NewRecordingRule("rule3", nil, labels.FromStrings("l1", "v1")), NewRecordingRule("rule3", nil, labels.FromStrings("l1", "v2")), NewAlertingRule("alert", nil, 0, labels.EmptyLabels(), labels.EmptyLabels(), labels.EmptyLabels(), "", true, nil), NewRecordingRule("rule1", nil, labels.EmptyLabels()), NewAlertingRule("alert2", nil, 0, labels.FromStrings("l2", "v0"), labels.EmptyLabels(), labels.EmptyLabels(), "", true, nil), NewAlertingRule("alert2", nil, 0, labels.FromStrings("l2", "v1"), labels.EmptyLabels(), labels.EmptyLabels(), "", true, nil), NewRecordingRule("rule4", nil, labels.EmptyLabels()), }, seriesInPreviousEval: make([]map[string]labels.Labels, 8), } newGroup.CopyState(oldGroup) want := []map[string]labels.Labels{ nil, {"r3a": labels.FromStrings("l1", "v1")}, {"r3b": labels.FromStrings("l1", "v2")}, {}, {}, nil, {"a2": labels.FromStrings("l2", "v1")}, nil, } require.Equal(t, want, newGroup.seriesInPreviousEval) require.Equal(t, oldGroup.rules[0], newGroup.rules[3]) require.Equal(t, oldGroup.evaluationTime, newGroup.evaluationTime) require.Equal(t, oldGroup.lastEvaluation, newGroup.lastEvaluation) require.Equal(t, []labels.Labels{labels.FromStrings("l1", "v3")}, newGroup.staleSeries) } func TestDeletedRuleMarkedStale(t *testing.T) { st := teststorage.New(t) defer st.Close() oldGroup := &Group{ rules: []Rule{ NewRecordingRule("rule1", nil, labels.FromStrings("l1", "v1")), }, seriesInPreviousEval: []map[string]labels.Labels{ {"r1": labels.FromStrings("l1", "v1")}, }, } newGroup := &Group{ rules: []Rule{}, seriesInPreviousEval: []map[string]labels.Labels{}, opts: &ManagerOptions{ Appendable: st, }, } newGroup.CopyState(oldGroup) newGroup.Eval(context.Background(), time.Unix(0, 0)) querier, err := st.Querier(context.Background(), 0, 2000) require.NoError(t, err) defer querier.Close() matcher, err := labels.NewMatcher(labels.MatchEqual, "l1", "v1") require.NoError(t, err) set := querier.Select(false, nil, matcher) samples, err := readSeriesSet(set) require.NoError(t, err) metric := labels.FromStrings("l1", "v1").String() metricSample, ok := samples[metric] require.True(t, ok, "Series %s not returned.", metric) require.True(t, value.IsStaleNaN(metricSample[0].V), "Appended sample not as expected. Wanted: stale NaN Got: %x", math.Float64bits(metricSample[0].V)) } func TestUpdate(t *testing.T) { files := []string{"fixtures/rules.yaml"} expected := map[string]labels.Labels{ "test": labels.FromStrings("name", "value"), } st := teststorage.New(t) defer st.Close() opts := promql.EngineOpts{ Logger: nil, Reg: nil, MaxSamples: 10, Timeout: 10 * time.Second, } engine := promql.NewEngine(opts) ruleManager := NewManager(&ManagerOptions{ Appendable: st, Queryable: st, QueryFunc: EngineQueryFunc(engine, st), Context: context.Background(), Logger: log.NewNopLogger(), }) ruleManager.start() defer ruleManager.Stop() err := ruleManager.Update(10*time.Second, files, labels.EmptyLabels(), "", nil) require.NoError(t, err) require.Greater(t, len(ruleManager.groups), 0, "expected non-empty rule groups") ogs := map[string]*Group{} for h, g := range ruleManager.groups { g.seriesInPreviousEval = []map[string]labels.Labels{ expected, } ogs[h] = g } err = ruleManager.Update(10*time.Second, files, labels.EmptyLabels(), "", nil) require.NoError(t, err) for h, g := range ruleManager.groups { for _, actual := range g.seriesInPreviousEval { require.Equal(t, expected, actual) } // Groups are the same because of no updates. require.Equal(t, ogs[h], g) } // Groups will be recreated if updated. rgs, errs := rulefmt.ParseFile("fixtures/rules.yaml") require.Equal(t, 0, len(errs), "file parsing failures") tmpFile, err := os.CreateTemp("", "rules.test.*.yaml") require.NoError(t, err) defer os.Remove(tmpFile.Name()) defer tmpFile.Close() err = ruleManager.Update(10*time.Second, []string{tmpFile.Name()}, labels.EmptyLabels(), "", nil) require.NoError(t, err) for h, g := range ruleManager.groups { ogs[h] = g } // Update interval and reload. for i, g := range rgs.Groups { if g.Interval != 0 { rgs.Groups[i].Interval = g.Interval * 2 } else { rgs.Groups[i].Interval = model.Duration(10) } } reloadAndValidate(rgs, t, tmpFile, ruleManager, expected, ogs) // Update limit and reload. for i := range rgs.Groups { rgs.Groups[i].Limit = 1 } reloadAndValidate(rgs, t, tmpFile, ruleManager, expected, ogs) // Change group rules and reload. for i, g := range rgs.Groups { for j, r := range g.Rules { rgs.Groups[i].Rules[j].Expr.SetString(fmt.Sprintf("%s * 0", r.Expr.Value)) } } reloadAndValidate(rgs, t, tmpFile, ruleManager, expected, ogs) // Change group source tenants and reload. for i := range rgs.Groups { rgs.Groups[i].SourceTenants = []string{"tenant-2"} } reloadAndValidate(rgs, t, tmpFile, ruleManager, expected, ogs) } func TestUpdate_AlwaysRestore(t *testing.T) { st := teststorage.New(t) defer st.Close() ruleManager := NewManager(&ManagerOptions{ Appendable: st, Queryable: st, Context: context.Background(), Logger: log.NewNopLogger(), AlwaysRestoreAlertState: true, }) ruleManager.start() defer ruleManager.Stop() err := ruleManager.Update(10*time.Second, []string{"fixtures/rules_alerts.yaml"}, nil, "", nil) require.NoError(t, err) for _, g := range ruleManager.groups { require.True(t, g.shouldRestore) g.shouldRestore = false // set to false to check if Update will set it to true again } // Use different file, so groups haven't changed, therefore, we expect state restoration err = ruleManager.Update(10*time.Second, []string{"fixtures/rules_alerts2.yaml"}, nil, "", nil) for _, g := range ruleManager.groups { require.True(t, g.shouldRestore) } require.NoError(t, err) } func TestUpdate_AlwaysRestoreDoesntAffectUnchangedGroups(t *testing.T) { files := []string{"fixtures/rules_alerts.yaml"} st := teststorage.New(t) defer st.Close() ruleManager := NewManager(&ManagerOptions{ Appendable: st, Queryable: st, Context: context.Background(), Logger: log.NewNopLogger(), AlwaysRestoreAlertState: true, }) ruleManager.start() defer ruleManager.Stop() err := ruleManager.Update(10*time.Second, files, nil, "", nil) require.NoError(t, err) for _, g := range ruleManager.groups { require.True(t, g.shouldRestore) g.shouldRestore = false // set to false to check if Update will set it to true again } // Use the same file, so groups haven't changed, therefore, we don't expect state restoration err = ruleManager.Update(10*time.Second, files, nil, "", nil) for _, g := range ruleManager.groups { require.False(t, g.shouldRestore) } require.NoError(t, err) } func TestUpdateSetsSourceTenants(t *testing.T) { st := teststorage.New(t) defer st.Close() opts := promql.EngineOpts{ Logger: nil, Reg: nil, MaxSamples: 10, Timeout: 10 * time.Second, } engine := promql.NewEngine(opts) ruleManager := NewManager(&ManagerOptions{ Appendable: st, Queryable: st, QueryFunc: EngineQueryFunc(engine, st), Context: context.Background(), Logger: log.NewNopLogger(), }) ruleManager.start() defer ruleManager.Stop() rgs, errs := rulefmt.ParseFile("fixtures/rules_with_source_tenants.yaml") require.Empty(t, errs, "file parsing failures") tmpFile, err := os.CreateTemp("", "rules.test.*.yaml") require.NoError(t, err) defer os.Remove(tmpFile.Name()) defer tmpFile.Close() reloadRules(rgs, t, tmpFile, ruleManager, 0) // check that all source tenants were actually set require.Len(t, ruleManager.groups, len(rgs.Groups)) for _, expectedGroup := range rgs.Groups { actualGroup, ok := ruleManager.groups[GroupKey(tmpFile.Name(), expectedGroup.Name)] require.True(t, ok, "actual groups don't contain at one of the expected groups") require.ElementsMatch(t, expectedGroup.SourceTenants, actualGroup.SourceTenants()) } } func TestGroupEvaluationContextFuncIsCalledWhenSupplied(t *testing.T) { type testContextKeyType string var testContextKey testContextKeyType = "TestGroupEvaluationContextFuncIsCalledWhenSupplied" oldContextTestValue := context.Background().Value(testContextKey) contextTestValueChannel := make(chan interface{}) mockQueryFunc := func(ctx context.Context, qs string, t time.Time) (promql.Vector, error) { contextTestValueChannel <- ctx.Value(testContextKey) return promql.Vector{}, nil } mockContextWrapFunc := func(ctx context.Context, g *Group) context.Context { return context.WithValue(ctx, testContextKey, 42) } st := teststorage.New(t) defer st.Close() ruleManager := NewManager(&ManagerOptions{ Appendable: st, Queryable: st, QueryFunc: mockQueryFunc, Context: context.Background(), Logger: log.NewNopLogger(), GroupEvaluationContextFunc: mockContextWrapFunc, }) rgs, errs := rulefmt.ParseFile("fixtures/rules_with_source_tenants.yaml") require.Empty(t, errs, "file parsing failures") tmpFile, err := os.CreateTemp("", "rules.test.*.yaml") require.NoError(t, err) defer os.Remove(tmpFile.Name()) defer tmpFile.Close() // no filesystem is harmed when running this test, set the interval low reloadRules(rgs, t, tmpFile, ruleManager, 10*time.Millisecond) ruleManager.start() defer ruleManager.Stop() // check that all source tenants were actually set require.Len(t, ruleManager.groups, len(rgs.Groups)) require.Nil(t, oldContextTestValue, "Context contained test key before the test, impossible") newContextTestValue := <-contextTestValueChannel require.Equal(t, 42, newContextTestValue, "Context does not contain the correct value that should be injected") } // ruleGroupsTest for running tests over rules. type ruleGroupsTest struct { Groups []ruleGroupTest `yaml:"groups"` } // ruleGroupTest forms a testing struct for running tests over rules. type ruleGroupTest struct { Name string `yaml:"name"` Interval model.Duration `yaml:"interval,omitempty"` Limit int `yaml:"limit,omitempty"` Rules []rulefmt.Rule `yaml:"rules"` SourceTenants []string `yaml:"source_tenants,omitempty"` } func formatRules(r *rulefmt.RuleGroups) ruleGroupsTest { grps := r.Groups tmp := []ruleGroupTest{} for _, g := range grps { rtmp := []rulefmt.Rule{} for _, r := range g.Rules { rtmp = append(rtmp, rulefmt.Rule{ Record: r.Record.Value, Alert: r.Alert.Value, Expr: r.Expr.Value, For: r.For, Labels: r.Labels, Annotations: r.Annotations, }) } tmp = append(tmp, ruleGroupTest{ Name: g.Name, Interval: g.Interval, Limit: g.Limit, Rules: rtmp, SourceTenants: g.SourceTenants, }) } return ruleGroupsTest{ Groups: tmp, } } func reloadRules(rgs *rulefmt.RuleGroups, t *testing.T, tmpFile *os.File, ruleManager *Manager, interval time.Duration) { if interval == 0 { interval = 10 * time.Second } bs, err := yaml.Marshal(formatRules(rgs)) require.NoError(t, err) _, _ = tmpFile.Seek(0, 0) _, err = tmpFile.Write(bs) require.NoError(t, err) err = ruleManager.Update(interval, []string{tmpFile.Name()}, nil, "", nil) require.NoError(t, err) } func reloadAndValidate(rgs *rulefmt.RuleGroups, t *testing.T, tmpFile *os.File, ruleManager *Manager, expected map[string]labels.Labels, ogs map[string]*Group) { reloadRules(rgs, t, tmpFile, ruleManager, 0) for h, g := range ruleManager.groups { if ogs[h] == g { t.Fail() } ogs[h] = g } } func TestNotify(t *testing.T) { storage := teststorage.New(t) defer storage.Close() engineOpts := promql.EngineOpts{ Logger: nil, Reg: nil, MaxSamples: 10, Timeout: 10 * time.Second, } engine := promql.NewEngine(engineOpts) var lastNotified []*Alert notifyFunc := func(ctx context.Context, expr string, alerts ...*Alert) { lastNotified = alerts } opts := &ManagerOptions{ QueryFunc: EngineQueryFunc(engine, storage), Appendable: storage, Queryable: storage, Context: context.Background(), Logger: log.NewNopLogger(), NotifyFunc: notifyFunc, ResendDelay: 2 * time.Second, } expr, err := parser.ParseExpr("a > 1") require.NoError(t, err) rule := NewAlertingRule("aTooHigh", expr, 0, labels.Labels{}, labels.Labels{}, labels.EmptyLabels(), "", true, log.NewNopLogger()) group := NewGroup(GroupOptions{ Name: "alert", Interval: time.Second, Rules: []Rule{rule}, ShouldRestore: true, Opts: opts, }) app := storage.Appender(context.Background()) app.Append(0, labels.FromStrings(model.MetricNameLabel, "a"), 1000, 2) app.Append(0, labels.FromStrings(model.MetricNameLabel, "a"), 2000, 3) app.Append(0, labels.FromStrings(model.MetricNameLabel, "a"), 5000, 3) app.Append(0, labels.FromStrings(model.MetricNameLabel, "a"), 6000, 0) err = app.Commit() require.NoError(t, err) ctx := context.Background() // Alert sent right away group.Eval(ctx, time.Unix(1, 0)) require.Equal(t, 1, len(lastNotified)) require.NotZero(t, lastNotified[0].ValidUntil, "ValidUntil should not be zero") // Alert is not sent 1s later group.Eval(ctx, time.Unix(2, 0)) require.Equal(t, 0, len(lastNotified)) // Alert is resent at t=5s group.Eval(ctx, time.Unix(5, 0)) require.Equal(t, 1, len(lastNotified)) // Resolution alert sent right away group.Eval(ctx, time.Unix(6, 0)) require.Equal(t, 1, len(lastNotified)) } func TestMetricsUpdate(t *testing.T) { files := []string{"fixtures/rules.yaml", "fixtures/rules2.yaml"} metricNames := []string{ "prometheus_rule_evaluations_total", "prometheus_rule_evaluation_failures_total", "prometheus_rule_group_interval_seconds", "prometheus_rule_group_last_duration_seconds", "prometheus_rule_group_last_evaluation_timestamp_seconds", "prometheus_rule_group_rules", } storage := teststorage.New(t) defer storage.Close() registry := prometheus.NewRegistry() opts := promql.EngineOpts{ Logger: nil, Reg: nil, MaxSamples: 10, Timeout: 10 * time.Second, } engine := promql.NewEngine(opts) ruleManager := NewManager(&ManagerOptions{ Appendable: storage, Queryable: storage, QueryFunc: EngineQueryFunc(engine, storage), Context: context.Background(), Logger: log.NewNopLogger(), Registerer: registry, }) ruleManager.start() defer ruleManager.Stop() countMetrics := func() int { ms, err := registry.Gather() require.NoError(t, err) var metrics int for _, m := range ms { s := m.GetName() for _, n := range metricNames { if s == n { metrics += len(m.Metric) break } } } return metrics } cases := []struct { files []string metrics int }{ { files: files, metrics: 12, }, { files: files[:1], metrics: 6, }, { files: files[:0], metrics: 0, }, { files: files[1:], metrics: 6, }, } for i, c := range cases { err := ruleManager.Update(time.Second, c.files, labels.EmptyLabels(), "", nil) require.NoError(t, err) time.Sleep(2 * time.Second) require.Equal(t, c.metrics, countMetrics(), "test %d: invalid count of metrics", i) } } func TestGroupStalenessOnRemoval(t *testing.T) { if testing.Short() { t.Skip("skipping test in short mode.") } files := []string{"fixtures/rules2.yaml"} sameFiles := []string{"fixtures/rules2_copy.yaml"} storage := teststorage.New(t) defer storage.Close() opts := promql.EngineOpts{ Logger: nil, Reg: nil, MaxSamples: 10, Timeout: 10 * time.Second, } engine := promql.NewEngine(opts) ruleManager := NewManager(&ManagerOptions{ Appendable: storage, Queryable: storage, QueryFunc: EngineQueryFunc(engine, storage), Context: context.Background(), Logger: log.NewNopLogger(), }) var stopped bool ruleManager.start() defer func() { if !stopped { ruleManager.Stop() } }() cases := []struct { files []string staleNaN int }{ { files: files, staleNaN: 0, }, { // When we remove the files, it should produce a staleness marker. files: files[:0], staleNaN: 1, }, { // Rules that produce the same metrics but in a different file // should not produce staleness marker. files: sameFiles, staleNaN: 0, }, { // Staleness marker should be present as we don't have any rules // loaded anymore. files: files[:0], staleNaN: 1, }, { // Add rules back so we have rules loaded when we stop the manager // and check for the absence of staleness markers. files: sameFiles, staleNaN: 0, }, } var totalStaleNaN int for i, c := range cases { err := ruleManager.Update(time.Second, c.files, labels.EmptyLabels(), "", nil) require.NoError(t, err) time.Sleep(3 * time.Second) totalStaleNaN += c.staleNaN require.Equal(t, totalStaleNaN, countStaleNaN(t, storage), "test %d/%q: invalid count of staleness markers", i, c.files) } ruleManager.Stop() stopped = true require.Equal(t, totalStaleNaN, countStaleNaN(t, storage), "invalid count of staleness markers after stopping the engine") } func TestMetricsStalenessOnManagerShutdown(t *testing.T) { if testing.Short() { t.Skip("skipping test in short mode.") } files := []string{"fixtures/rules2.yaml"} storage := teststorage.New(t) defer storage.Close() opts := promql.EngineOpts{ Logger: nil, Reg: nil, MaxSamples: 10, Timeout: 10 * time.Second, } engine := promql.NewEngine(opts) ruleManager := NewManager(&ManagerOptions{ Appendable: storage, Queryable: storage, QueryFunc: EngineQueryFunc(engine, storage), Context: context.Background(), Logger: log.NewNopLogger(), }) var stopped bool ruleManager.start() defer func() { if !stopped { ruleManager.Stop() } }() err := ruleManager.Update(2*time.Second, files, labels.EmptyLabels(), "", nil) time.Sleep(4 * time.Second) require.NoError(t, err) start := time.Now() err = ruleManager.Update(3*time.Second, files[:0], labels.EmptyLabels(), "", nil) require.NoError(t, err) ruleManager.Stop() stopped = true require.True(t, time.Since(start) < 1*time.Second, "rule manager does not stop early") time.Sleep(5 * time.Second) require.Equal(t, 0, countStaleNaN(t, storage), "invalid count of staleness markers after stopping the engine") } func countStaleNaN(t *testing.T, st storage.Storage) int { var c int querier, err := st.Querier(context.Background(), 0, time.Now().Unix()*1000) require.NoError(t, err) defer querier.Close() matcher, err := labels.NewMatcher(labels.MatchEqual, model.MetricNameLabel, "test_2") require.NoError(t, err) set := querier.Select(false, nil, matcher) samples, err := readSeriesSet(set) require.NoError(t, err) metric := labels.FromStrings(model.MetricNameLabel, "test_2").String() metricSample, ok := samples[metric] require.True(t, ok, "Series %s not returned.", metric) for _, s := range metricSample { if value.IsStaleNaN(s.V) { c++ } } return c } func TestGroupHasAlertingRules(t *testing.T) { tests := []struct { group *Group want bool }{ { group: &Group{ name: "HasAlertingRule", rules: []Rule{ NewAlertingRule("alert", nil, 0, labels.EmptyLabels(), labels.EmptyLabels(), labels.EmptyLabels(), "", true, nil), NewRecordingRule("record", nil, labels.EmptyLabels()), }, }, want: true, }, { group: &Group{ name: "HasNoRule", rules: []Rule{}, }, want: false, }, { group: &Group{ name: "HasOnlyRecordingRule", rules: []Rule{ NewRecordingRule("record", nil, labels.EmptyLabels()), }, }, want: false, }, } for i, test := range tests { got := test.group.HasAlertingRules() require.Equal(t, test.want, got, "test case %d failed, expected:%t got:%t", i, test.want, got) } } func TestRuleHealthUpdates(t *testing.T) { st := teststorage.New(t) defer st.Close() engineOpts := promql.EngineOpts{ Logger: nil, Reg: nil, MaxSamples: 10, Timeout: 10 * time.Second, } engine := promql.NewEngine(engineOpts) opts := &ManagerOptions{ QueryFunc: EngineQueryFunc(engine, st), Appendable: st, Queryable: st, Context: context.Background(), Logger: log.NewNopLogger(), } expr, err := parser.ParseExpr("a + 1") require.NoError(t, err) rule := NewRecordingRule("a_plus_one", expr, labels.Labels{}) group := NewGroup(GroupOptions{ Name: "default", Interval: time.Second, Rules: []Rule{rule}, ShouldRestore: true, Opts: opts, }) // A time series that has two samples. app := st.Appender(context.Background()) app.Append(0, labels.FromStrings(model.MetricNameLabel, "a"), 0, 1) app.Append(0, labels.FromStrings(model.MetricNameLabel, "a"), 1000, 2) err = app.Commit() require.NoError(t, err) ctx := context.Background() rules := group.Rules()[0] require.NoError(t, rules.LastError()) require.Equal(t, HealthUnknown, rules.Health()) // Execute 2 times, it should be all green. group.Eval(ctx, time.Unix(0, 0)) group.Eval(ctx, time.Unix(1, 0)) rules = group.Rules()[0] require.NoError(t, rules.LastError()) require.Equal(t, HealthGood, rules.Health()) // Now execute the rule in the past again, this should cause append failures. group.Eval(ctx, time.Unix(0, 0)) rules = group.Rules()[0] require.EqualError(t, rules.LastError(), storage.ErrOutOfOrderSample.Error()) require.Equal(t, HealthBad, rules.Health()) } func TestGroup_Equals(t *testing.T) { testExpression, err := parser.ParseExpr("up") require.NoError(t, err) tests := []struct { name string groupOne *Group groupTwo *Group areEqual bool }{ { name: "identical configs", groupOne: &Group{ name: "example_group", rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, }, }, groupTwo: &Group{ name: "example_group", rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, }, }, areEqual: true, }, { name: "differently ordered source tenants (should still be equivalent)", groupOne: &Group{ name: "example_group", sourceTenants: []string{"tenant-2", "tenant-1"}, rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, }, }, groupTwo: &Group{ name: "example_group", sourceTenants: []string{"tenant-1", "tenant-2"}, rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, }, }, areEqual: true, }, { name: "different rule length", groupOne: &Group{ name: "example_group", rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, }, }, groupTwo: &Group{ name: "example_group", rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, }, }, areEqual: false, }, { name: "different rule labels", groupOne: &Group{ name: "example_group", rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, }, }, groupTwo: &Group{ name: "example_group", rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"1": "2", "3": "4"}), }, }, }, areEqual: false, }, { name: "different source tenants", groupOne: &Group{ name: "example_group", sourceTenants: []string{"tenant-1", "tenant-3"}, rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, }, }, groupTwo: &Group{ name: "example_group", sourceTenants: []string{"tenant-1", "tenant-2"}, rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, }, }, areEqual: false, }, { name: "repeating source tenants", groupOne: &Group{ name: "example_group", sourceTenants: []string{"tenant-1", "tenant-2"}, rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, }, }, groupTwo: &Group{ name: "example_group", sourceTenants: []string{"tenant-1", "tenant-1"}, rules: []Rule{ &RecordingRule{ name: "one", vector: testExpression, labels: labels.FromMap(map[string]string{"a": "b", "c": "d"}), }, }, }, areEqual: false, }, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { require.Equal(t, tt.areEqual, tt.groupOne.Equals(tt.groupTwo)) require.Equal(t, tt.areEqual, tt.groupTwo.Equals(tt.groupOne)) }) } } func TestGroup_EvaluationDelay(t *testing.T) { config := ` groups: - name: group1 evaluation_delay: 2m - name: group2 evaluation_delay: 0s - name: group3 ` dir := t.TempDir() fname := path.Join(dir, "rules.yaml") err := os.WriteFile(fname, []byte(config), fs.ModePerm) require.NoError(t, err) m := NewManager(&ManagerOptions{ Logger: log.NewNopLogger(), DefaultEvaluationDelay: func() time.Duration { return time.Minute }, }) m.start() err = m.Update(time.Second, []string{fname}, nil, "", nil) require.NoError(t, err) rgs := m.RuleGroups() sort.Slice(rgs, func(i, j int) bool { return rgs[i].Name() < rgs[j].Name() }) // From config. require.Equal(t, 2*time.Minute, rgs[0].EvaluationDelay()) // Setting 0 in config is detected. require.Equal(t, time.Duration(0), rgs[1].EvaluationDelay()) // Default when nothing is set. require.Equal(t, time.Minute, rgs[2].EvaluationDelay()) m.Stop() } func TestUpdateMissedEvalMetrics(t *testing.T) { suite, err := promql.NewTest(t, ` load 5m http_requests{instance="0"} 75 85 50 0 0 25 0 0 40 0 120 `) require.NoError(t, err) defer suite.Close() err = suite.Run() require.NoError(t, err) expr, err := parser.ParseExpr(`http_requests{group="canary", job="app-server"} < 100`) require.NoError(t, err) testValue := 1 overrideFunc := func(g *Group, lastEvalTimestamp time.Time, log log.Logger) error { testValue = 2 return nil } type testInput struct { overrideFunc func(g *Group, lastEvalTimestamp time.Time, logger log.Logger) error expectedValue int } tests := []testInput{ // testValue should still have value of 1 since overrideFunc is nil. { overrideFunc: nil, expectedValue: 1, }, // testValue should be incremented to 2 since overrideFunc is called. { overrideFunc: overrideFunc, expectedValue: 2, }, } testFunc := func(tst testInput) { opts := &ManagerOptions{ QueryFunc: EngineQueryFunc(suite.QueryEngine(), suite.Storage()), Appendable: suite.Storage(), Queryable: suite.Storage(), Context: context.Background(), Logger: log.NewNopLogger(), NotifyFunc: func(ctx context.Context, expr string, alerts ...*Alert) {}, OutageTolerance: 30 * time.Minute, ForGracePeriod: 10 * time.Minute, } activeAlert := &Alert{ State: StateFiring, ActiveAt: time.Now(), } m := map[uint64]*Alert{} m[1] = activeAlert rule := &AlertingRule{ name: "HTTPRequestRateLow", vector: expr, holdDuration: 5 * time.Minute, labels: labels.FromStrings("severity", "critical"), annotations: labels.EmptyLabels(), externalLabels: nil, externalURL: "", active: m, logger: nil, restored: atomic.NewBool(true), health: atomic.NewString(string(HealthUnknown)), evaluationTimestamp: atomic.NewTime(time.Time{}), evaluationDuration: atomic.NewDuration(0), lastError: atomic.NewError(nil), } group := NewGroup(GroupOptions{ Name: "default", Interval: time.Second, Rules: []Rule{rule}, ShouldRestore: true, Opts: opts, RuleGroupPostProcessFunc: tst.overrideFunc, }) go func() { group.run(opts.Context) }() time.Sleep(3 * time.Second) group.stop() require.Equal(t, tst.expectedValue, testValue) } for _, tst := range tests { testFunc(tst) } } func TestNativeHistogramsInRecordingRules(t *testing.T) { suite, err := promql.NewTest(t, "") require.NoError(t, err) t.Cleanup(suite.Close) err = suite.Run() require.NoError(t, err) // Add some histograms. db := suite.TSDB() hists := tsdb.GenerateTestHistograms(5) ts := time.Now() app := db.Appender(context.Background()) for i, h := range hists { l := labels.FromStrings("__name__", "histogram_metric", "idx", fmt.Sprintf("%d", i)) _, err := app.AppendHistogram(0, l, ts.UnixMilli(), h.Copy(), nil) require.NoError(t, err) } require.NoError(t, app.Commit()) opts := &ManagerOptions{ QueryFunc: EngineQueryFunc(suite.QueryEngine(), suite.Storage()), Appendable: suite.Storage(), Queryable: suite.Storage(), Context: context.Background(), Logger: log.NewNopLogger(), } expr, err := parser.ParseExpr("sum(histogram_metric)") require.NoError(t, err) rule := NewRecordingRule("sum:histogram_metric", expr, labels.Labels{}) group := NewGroup(GroupOptions{ Name: "default", Interval: time.Hour, Rules: []Rule{rule}, ShouldRestore: true, Opts: opts, }) group.Eval(context.Background(), ts.Add(10*time.Second)) q, err := db.Querier(context.Background(), ts.UnixMilli(), ts.Add(20*time.Second).UnixMilli()) require.NoError(t, err) ss := q.Select(false, nil, labels.MustNewMatcher(labels.MatchEqual, "__name__", "sum:histogram_metric")) require.True(t, ss.Next()) s := ss.At() require.False(t, ss.Next()) require.Equal(t, labels.FromStrings("__name__", "sum:histogram_metric"), s.Labels()) expHist := hists[0].ToFloat() for _, h := range hists[1:] { expHist = expHist.Add(h.ToFloat()) } expHist.CounterResetHint = histogram.GaugeType it := s.Iterator(nil) require.Equal(t, chunkenc.ValFloatHistogram, it.Next()) tsp, fh := it.AtFloatHistogram() require.Equal(t, ts.Add(10*time.Second).UnixMilli(), tsp) require.Equal(t, expHist, fh) require.Equal(t, chunkenc.ValNone, it.Next()) }