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323 lines
8.5 KiB
323 lines
8.5 KiB
// Copyright 2013 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 rules |
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import ( |
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"context" |
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"fmt" |
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"math" |
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"sort" |
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"testing" |
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"time" |
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|
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"github.com/go-kit/kit/log" |
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"github.com/prometheus/common/model" |
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|
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"github.com/prometheus/prometheus/pkg/labels" |
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"github.com/prometheus/prometheus/pkg/timestamp" |
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"github.com/prometheus/prometheus/pkg/value" |
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"github.com/prometheus/prometheus/promql" |
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"github.com/prometheus/prometheus/storage" |
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"github.com/prometheus/prometheus/util/testutil" |
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) |
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func TestAlertingRule(t *testing.T) { |
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suite, err := promql.NewTest(t, ` |
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load 5m |
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http_requests{job="app-server", instance="0", group="canary", severity="overwrite-me"} 75 85 95 105 105 95 85 |
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http_requests{job="app-server", instance="1", group="canary", severity="overwrite-me"} 80 90 100 110 120 130 140 |
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`) |
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testutil.Ok(t, err) |
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defer suite.Close() |
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err = suite.Run() |
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testutil.Ok(t, err) |
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expr, err := promql.ParseExpr(`http_requests{group="canary", job="app-server"} < 100`) |
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testutil.Ok(t, err) |
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rule := NewAlertingRule( |
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"HTTPRequestRateLow", |
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expr, |
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time.Minute, |
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labels.FromStrings("severity", "{{\"c\"}}ritical"), |
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nil, nil, |
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) |
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result := promql.Vector{ |
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{ |
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Metric: labels.FromStrings( |
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"__name__", "ALERTS", |
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"alertname", "HTTPRequestRateLow", |
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"alertstate", "pending", |
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"group", "canary", |
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"instance", "0", |
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"job", "app-server", |
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"severity", "critical", |
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), |
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Point: promql.Point{V: 1}, |
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}, |
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{ |
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Metric: labels.FromStrings( |
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"__name__", "ALERTS", |
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"alertname", "HTTPRequestRateLow", |
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"alertstate", "pending", |
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"group", "canary", |
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"instance", "1", |
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"job", "app-server", |
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"severity", "critical", |
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), |
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Point: promql.Point{V: 1}, |
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}, |
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{ |
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Metric: labels.FromStrings( |
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"__name__", "ALERTS", |
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"alertname", "HTTPRequestRateLow", |
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"alertstate", "firing", |
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"group", "canary", |
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"instance", "0", |
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"job", "app-server", |
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"severity", "critical", |
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), |
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Point: promql.Point{V: 1}, |
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}, |
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{ |
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Metric: labels.FromStrings( |
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"__name__", "ALERTS", |
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"alertname", "HTTPRequestRateLow", |
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"alertstate", "firing", |
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"group", "canary", |
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"instance", "1", |
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"job", "app-server", |
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"severity", "critical", |
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), |
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Point: promql.Point{V: 1}, |
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}, |
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} |
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baseTime := time.Unix(0, 0) |
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var tests = []struct { |
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time time.Duration |
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result promql.Vector |
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}{ |
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{ |
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time: 0, |
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result: result[:2], |
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}, { |
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time: 5 * time.Minute, |
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result: result[2:], |
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}, { |
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time: 10 * time.Minute, |
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result: result[2:3], |
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}, |
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{ |
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time: 15 * time.Minute, |
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result: nil, |
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}, |
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{ |
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time: 20 * time.Minute, |
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result: nil, |
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}, |
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{ |
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time: 25 * time.Minute, |
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result: result[:1], |
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}, |
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{ |
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time: 30 * time.Minute, |
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result: result[2:3], |
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}, |
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} |
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for i, test := range tests { |
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t.Logf("case %d", i) |
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evalTime := baseTime.Add(test.time) |
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res, err := rule.Eval(suite.Context(), evalTime, EngineQueryFunc(suite.QueryEngine()), nil) |
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testutil.Ok(t, err) |
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for i := range test.result { |
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test.result[i].T = timestamp.FromTime(evalTime) |
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} |
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testutil.Assert(t, len(test.result) == len(res), "%d. Number of samples in expected and actual output don't match (%d vs. %d)", i, len(test.result), len(res)) |
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sort.Slice(res, func(i, j int) bool { |
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return labels.Compare(res[i].Metric, res[j].Metric) < 0 |
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}) |
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testutil.Equals(t, test.result, res) |
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for _, aa := range rule.ActiveAlerts() { |
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testutil.Assert(t, aa.Labels.Get(model.MetricNameLabel) == "", "%s label set on active alert: %s", model.MetricNameLabel, aa.Labels) |
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} |
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} |
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} |
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func annotateWithTime(lines []string, ts time.Time) []string { |
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annotatedLines := []string{} |
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for _, line := range lines { |
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annotatedLines = append(annotatedLines, fmt.Sprintf(line, timestamp.FromTime(ts))) |
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} |
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return annotatedLines |
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} |
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func TestStaleness(t *testing.T) { |
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storage := testutil.NewStorage(t) |
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defer storage.Close() |
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engine := promql.NewEngine(storage, nil) |
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opts := &ManagerOptions{ |
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QueryFunc: EngineQueryFunc(engine), |
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Appendable: storage, |
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Context: context.Background(), |
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Logger: log.NewNopLogger(), |
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} |
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expr, err := promql.ParseExpr("a + 1") |
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testutil.Ok(t, err) |
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rule := NewRecordingRule("a_plus_one", expr, labels.Labels{}) |
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group := NewGroup("default", "", time.Second, []Rule{rule}, opts) |
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// A time series that has two samples and then goes stale. |
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app, _ := storage.Appender() |
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app.Add(labels.FromStrings(model.MetricNameLabel, "a"), 0, 1) |
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app.Add(labels.FromStrings(model.MetricNameLabel, "a"), 1000, 2) |
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app.Add(labels.FromStrings(model.MetricNameLabel, "a"), 2000, math.Float64frombits(value.StaleNaN)) |
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err = app.Commit() |
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testutil.Ok(t, err) |
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ctx := context.Background() |
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// Execute 3 times, 1 second apart. |
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group.Eval(ctx, time.Unix(0, 0)) |
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group.Eval(ctx, time.Unix(1, 0)) |
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group.Eval(ctx, time.Unix(2, 0)) |
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querier, err := storage.Querier(context.Background(), 0, 2000) |
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testutil.Ok(t, err) |
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defer querier.Close() |
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matcher, err := labels.NewMatcher(labels.MatchEqual, model.MetricNameLabel, "a_plus_one") |
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testutil.Ok(t, err) |
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set, err := querier.Select(matcher) |
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testutil.Ok(t, err) |
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samples, err := readSeriesSet(set) |
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testutil.Ok(t, err) |
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metric := labels.FromStrings(model.MetricNameLabel, "a_plus_one").String() |
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metricSample, ok := samples[metric] |
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testutil.Assert(t, ok, "Series %s not returned.", metric) |
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testutil.Assert(t, value.IsStaleNaN(metricSample[2].V), "Appended second sample not as expected. Wanted: stale NaN Got: %x", math.Float64bits(metricSample[2].V)) |
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metricSample[2].V = 42 // reflect.DeepEqual cannot handle NaN. |
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want := map[string][]promql.Point{ |
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metric: []promql.Point{{0, 2}, {1000, 3}, {2000, 42}}, |
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} |
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testutil.Equals(t, want, samples) |
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} |
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// Convert a SeriesSet into a form useable with reflect.DeepEqual. |
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func readSeriesSet(ss storage.SeriesSet) (map[string][]promql.Point, error) { |
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result := map[string][]promql.Point{} |
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for ss.Next() { |
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series := ss.At() |
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points := []promql.Point{} |
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it := series.Iterator() |
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for it.Next() { |
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t, v := it.At() |
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points = append(points, promql.Point{T: t, V: v}) |
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} |
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name := series.Labels().String() |
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result[name] = points |
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} |
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return result, ss.Err() |
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} |
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func TestCopyState(t *testing.T) { |
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oldGroup := &Group{ |
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rules: []Rule{ |
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NewAlertingRule("alert", nil, 0, nil, nil, nil), |
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NewRecordingRule("rule1", nil, nil), |
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NewRecordingRule("rule2", nil, nil), |
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NewRecordingRule("rule3", nil, nil), |
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NewRecordingRule("rule3", nil, nil), |
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}, |
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seriesInPreviousEval: []map[string]labels.Labels{ |
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map[string]labels.Labels{"a": nil}, |
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map[string]labels.Labels{"r1": nil}, |
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map[string]labels.Labels{"r2": nil}, |
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map[string]labels.Labels{"r3a": nil}, |
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map[string]labels.Labels{"r3b": nil}, |
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}, |
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evaluationTime: time.Second, |
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} |
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oldGroup.rules[0].(*AlertingRule).active[42] = nil |
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newGroup := &Group{ |
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rules: []Rule{ |
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NewRecordingRule("rule3", nil, nil), |
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NewRecordingRule("rule3", nil, nil), |
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NewRecordingRule("rule3", nil, nil), |
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NewAlertingRule("alert", nil, 0, nil, nil, nil), |
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NewRecordingRule("rule1", nil, nil), |
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NewRecordingRule("rule4", nil, nil), |
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}, |
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seriesInPreviousEval: make([]map[string]labels.Labels, 6), |
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} |
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newGroup.copyState(oldGroup) |
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want := []map[string]labels.Labels{ |
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map[string]labels.Labels{"r3a": nil}, |
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map[string]labels.Labels{"r3b": nil}, |
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nil, |
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map[string]labels.Labels{"a": nil}, |
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map[string]labels.Labels{"r1": nil}, |
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nil, |
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} |
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testutil.Equals(t, want, newGroup.seriesInPreviousEval) |
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testutil.Equals(t, oldGroup.rules[0], newGroup.rules[3]) |
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testutil.Equals(t, oldGroup.evaluationTime, newGroup.evaluationTime) |
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} |
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func TestUpdate(t *testing.T) { |
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expected := map[string]labels.Labels{ |
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"test": labels.FromStrings("name", "value"), |
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} |
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ruleManager := NewManager(&ManagerOptions{ |
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Context: context.Background(), |
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Logger: log.NewNopLogger(), |
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}) |
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ruleManager.Run() |
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err := ruleManager.Update(0, nil) |
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testutil.Ok(t, err) |
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for _, g := range ruleManager.groups { |
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g.seriesInPreviousEval = []map[string]labels.Labels{ |
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expected, |
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} |
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} |
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err = ruleManager.Update(0, nil) |
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testutil.Ok(t, err) |
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for _, g := range ruleManager.groups { |
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for _, actual := range g.seriesInPreviousEval { |
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testutil.Equals(t, expected, actual) |
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} |
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} |
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}
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