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269 lines
9.2 KiB
269 lines
9.2 KiB
// Copyright 2020 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 main
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import (
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"context"
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"math"
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"os"
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"path/filepath"
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"testing"
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"time"
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v1 "github.com/prometheus/client_golang/api/prometheus/v1"
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"github.com/prometheus/common/model"
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"github.com/prometheus/common/promslog"
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"github.com/stretchr/testify/require"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/tsdb"
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"github.com/prometheus/prometheus/tsdb/chunkenc"
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)
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type mockQueryRangeAPI struct {
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samples model.Matrix
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}
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func (mockAPI mockQueryRangeAPI) QueryRange(_ context.Context, query string, r v1.Range, opts ...v1.Option) (model.Value, v1.Warnings, error) {
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return mockAPI.samples, v1.Warnings{}, nil
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}
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const defaultBlockDuration = time.Duration(tsdb.DefaultBlockDuration) * time.Millisecond
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// TestBackfillRuleIntegration is an integration test that runs all the rule importer code to confirm the parts work together.
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func TestBackfillRuleIntegration(t *testing.T) {
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t.Parallel()
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const (
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testMaxSampleCount = 50
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testValue = 123
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testValue2 = 98
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)
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var (
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start = time.Date(2009, time.November, 10, 6, 34, 0, 0, time.UTC)
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testTime = model.Time(start.Add(-9 * time.Hour).Unix())
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testTime2 = model.Time(start.Add(-8 * time.Hour).Unix())
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twentyFourHourDuration, _ = time.ParseDuration("24h")
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)
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testCases := []struct {
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name string
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runcount int
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maxBlockDuration time.Duration
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expectedBlockCount int
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expectedSeriesCount int
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expectedSampleCount int
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samples []*model.SampleStream
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}{
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{"no samples", 1, defaultBlockDuration, 0, 0, 0, []*model.SampleStream{}},
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{"run importer once", 1, defaultBlockDuration, 8, 4, 4, []*model.SampleStream{{Metric: model.Metric{"name1": "val1"}, Values: []model.SamplePair{{Timestamp: testTime, Value: testValue}}}}},
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{"run importer with dup name label", 1, defaultBlockDuration, 8, 4, 4, []*model.SampleStream{{Metric: model.Metric{"__name__": "val1", "name1": "val1"}, Values: []model.SamplePair{{Timestamp: testTime, Value: testValue}}}}},
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{"one importer twice", 2, defaultBlockDuration, 8, 4, 8, []*model.SampleStream{{Metric: model.Metric{"name1": "val1"}, Values: []model.SamplePair{{Timestamp: testTime, Value: testValue}, {Timestamp: testTime2, Value: testValue2}}}}},
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{"run importer once with larger blocks", 1, twentyFourHourDuration, 4, 4, 4, []*model.SampleStream{{Metric: model.Metric{"name1": "val1"}, Values: []model.SamplePair{{Timestamp: testTime, Value: testValue}}}}},
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}
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for _, tt := range testCases {
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t.Run(tt.name, func(t *testing.T) {
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t.Parallel()
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tmpDir := t.TempDir()
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ctx := context.Background()
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// Execute the test more than once to simulate running the rule importer twice with the same data.
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// We expect duplicate blocks with the same series are created when run more than once.
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for i := 0; i < tt.runcount; i++ {
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ruleImporter, err := newTestRuleImporter(ctx, start, tmpDir, tt.samples, tt.maxBlockDuration)
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require.NoError(t, err)
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path1 := filepath.Join(tmpDir, "test.file")
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require.NoError(t, createSingleRuleTestFiles(path1))
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path2 := filepath.Join(tmpDir, "test2.file")
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require.NoError(t, createMultiRuleTestFiles(path2))
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// Confirm that the rule files were loaded in correctly.
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errs := ruleImporter.loadGroups(ctx, []string{path1, path2})
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for _, err := range errs {
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require.NoError(t, err)
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}
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require.Len(t, ruleImporter.groups, 3)
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group1 := ruleImporter.groups[path1+";group0"]
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require.NotNil(t, group1)
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const defaultInterval = 60
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require.Equal(t, defaultInterval*time.Second, group1.Interval())
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gRules := group1.Rules()
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require.Len(t, gRules, 1)
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require.Equal(t, "rule1", gRules[0].Name())
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require.Equal(t, "ruleExpr", gRules[0].Query().String())
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require.Equal(t, 1, gRules[0].Labels().Len())
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group2 := ruleImporter.groups[path2+";group2"]
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require.NotNil(t, group2)
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require.Equal(t, defaultInterval*time.Second, group2.Interval())
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g2Rules := group2.Rules()
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require.Len(t, g2Rules, 2)
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require.Equal(t, "grp2_rule1", g2Rules[0].Name())
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require.Equal(t, "grp2_rule1_expr", g2Rules[0].Query().String())
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require.Equal(t, 0, g2Rules[0].Labels().Len())
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// Backfill all recording rules then check the blocks to confirm the correct data was created.
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errs = ruleImporter.importAll(ctx)
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for _, err := range errs {
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require.NoError(t, err)
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}
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opts := tsdb.DefaultOptions()
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db, err := tsdb.Open(tmpDir, nil, nil, opts, nil)
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require.NoError(t, err)
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blocks := db.Blocks()
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require.Len(t, blocks, (i+1)*tt.expectedBlockCount)
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q, err := db.Querier(math.MinInt64, math.MaxInt64)
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require.NoError(t, err)
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selectedSeries := q.Select(ctx, false, nil, labels.MustNewMatcher(labels.MatchRegexp, "", ".*"))
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var seriesCount, samplesCount int
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for selectedSeries.Next() {
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seriesCount++
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series := selectedSeries.At()
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if series.Labels().Len() != 3 {
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require.Equal(t, 2, series.Labels().Len())
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x := labels.FromStrings("__name__", "grp2_rule1", "name1", "val1")
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require.Equal(t, x, series.Labels())
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} else {
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require.Equal(t, 3, series.Labels().Len())
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}
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it := series.Iterator(nil)
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for it.Next() == chunkenc.ValFloat {
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samplesCount++
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ts, v := it.At()
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if v == testValue {
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require.Equal(t, int64(testTime), ts)
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} else {
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require.Equal(t, int64(testTime2), ts)
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}
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}
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require.NoError(t, it.Err())
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}
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require.NoError(t, selectedSeries.Err())
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require.Equal(t, tt.expectedSeriesCount, seriesCount)
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require.Equal(t, tt.expectedSampleCount, samplesCount)
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require.NoError(t, q.Close())
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require.NoError(t, db.Close())
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}
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})
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}
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}
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func newTestRuleImporter(_ context.Context, start time.Time, tmpDir string, testSamples model.Matrix, maxBlockDuration time.Duration) (*ruleImporter, error) {
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logger := promslog.NewNopLogger()
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cfg := ruleImporterConfig{
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outputDir: tmpDir,
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start: start.Add(-10 * time.Hour),
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end: start.Add(-7 * time.Hour),
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evalInterval: 60 * time.Second,
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maxBlockDuration: maxBlockDuration,
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}
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return newRuleImporter(logger, cfg, mockQueryRangeAPI{
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samples: testSamples,
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}), nil
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}
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func createSingleRuleTestFiles(path string) error {
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recordingRules := `groups:
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- name: group0
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rules:
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- record: rule1
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expr: ruleExpr
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labels:
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testlabel11: testlabelvalue11
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`
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return os.WriteFile(path, []byte(recordingRules), 0o777)
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}
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func createMultiRuleTestFiles(path string) error {
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recordingRules := `groups:
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- name: group1
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rules:
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- record: grp1_rule1
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expr: grp1_rule1_expr
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labels:
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testlabel11: testlabelvalue12
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- name: group2
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rules:
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- record: grp2_rule1
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expr: grp2_rule1_expr
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- record: grp2_rule2
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expr: grp2_rule2_expr
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labels:
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testlabel11: testlabelvalue13
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`
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return os.WriteFile(path, []byte(recordingRules), 0o777)
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}
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// TestBackfillLabels confirms that the labels in the rule file override the labels from the metrics
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// received from Prometheus Query API, including the __name__ label.
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func TestBackfillLabels(t *testing.T) {
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t.Parallel()
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tmpDir := t.TempDir()
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ctx := context.Background()
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start := time.Date(2009, time.November, 10, 6, 34, 0, 0, time.UTC)
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mockAPISamples := []*model.SampleStream{
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{
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Metric: model.Metric{"name1": "override-me", "__name__": "override-me-too"},
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Values: []model.SamplePair{{Timestamp: model.TimeFromUnixNano(start.UnixNano()), Value: 123}},
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},
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}
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ruleImporter, err := newTestRuleImporter(ctx, start, tmpDir, mockAPISamples, defaultBlockDuration)
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require.NoError(t, err)
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path := filepath.Join(tmpDir, "test.file")
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recordingRules := `groups:
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- name: group0
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rules:
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- record: rulename
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expr: ruleExpr
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labels:
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name1: value-from-rule
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`
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require.NoError(t, os.WriteFile(path, []byte(recordingRules), 0o777))
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errs := ruleImporter.loadGroups(ctx, []string{path})
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for _, err := range errs {
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require.NoError(t, err)
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}
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errs = ruleImporter.importAll(ctx)
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for _, err := range errs {
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require.NoError(t, err)
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}
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opts := tsdb.DefaultOptions()
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db, err := tsdb.Open(tmpDir, nil, nil, opts, nil)
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require.NoError(t, err)
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q, err := db.Querier(math.MinInt64, math.MaxInt64)
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require.NoError(t, err)
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t.Run("correct-labels", func(t *testing.T) {
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t.Parallel()
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selectedSeries := q.Select(ctx, false, nil, labels.MustNewMatcher(labels.MatchRegexp, "", ".*"))
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for selectedSeries.Next() {
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series := selectedSeries.At()
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expectedLabels := labels.FromStrings("__name__", "rulename", "name1", "value-from-rule")
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require.Equal(t, expectedLabels, series.Labels())
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}
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require.NoError(t, selectedSeries.Err())
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require.NoError(t, q.Close())
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require.NoError(t, db.Close())
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})
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}
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